Altera’s 28-nm Stratix® V FPGAs include innovations such as an enhanced
core architecture, integrated transceivers up to 28.05 gigabits per second
(Gbps), and a unique array of integrated hard intellectual property (IP)
With these innovations, Stratix V FPGAs deliver a new class of
application-targeted devices optimized for:
applications and protocols, including
PCI Express® (PCIe®) Gen3
for 40G/100G and beyond
high-precision digital signal processing (DSP) applications
Stratix V devices are available in four variants (GT, GX, GS, and E),
each targeted for a different set of applications. For higher volume
production, you can prototype with Stratix V FPGAs and use the low-risk,
low-cost path to
HardCopy® V ASICs.
The Stratix V device family contains the GT, GX, GS, and E
Stratix V GT devices, with both 28.05-Gbps and 12.5-Gbps
transceivers, are optimized for applications that require ultra-high bandwidth
and performance in areas such as 40G/100G/400G optical communications systems
and optical test systems. 28.05-Gbps and 12.5-Gbps transceivers are also known
as GT and GX channels, respectively.
Stratix V GX devices offer up to 66 integrated transceivers with
14.1-Gbps data rate capability. These transceivers also support backplane and
optical interface applications. These devices are optimized for
high-performance, high-bandwidth applications such as 40G/100G optical
transport, packet processing, and traffic management found in wireline,
military communications, and network test equipment markets.
Stratix V GS devices have an abundance of variable precision DSP
blocks, supporting up to 3,926 18x18 or 1,963 27x27 multipliers. In addition,
Stratix V GS devices offer integrated transceivers with 14.1-Gbps data rate
capability. These transceivers also support backplane and optical interface
applications. These devices are optimized for transceiver-based DSP-centric
applications found in wireline, military, broadcast, and high-performance
Stratix V E devices offer the highest logic density within the
Stratix V family with nearly one million logic elements (LEs) in the largest
device. These devices are optimized for applications such as ASIC and system
emulation, diagnostic imaging, and instrumentation.
Common to all Stratix V family variants are a rich set of
high-performance building blocks, including a redesigned adaptive logic module
(ALM), 20 Kbit (M20K) embedded memory blocks, variable precision DSP blocks,
and fractional phase-locked loops (PLLs). All of these building blocks are
interconnected by Altera’s superior multi-track routing architecture and
comprehensive fabric clocking network.
Also common to Stratix V devices is the new Embedded HardCopy Block,
which is a customizable hard IP block that leverages Altera’s unique HardCopy
ASIC capabilities. The Embedded HardCopy Block in Stratix V FPGAs is used to
harden IP instantiation of PCIe Gen3, Gen2, and Gen1.
Stratix V Features Summary
Table 1. Summary of Features for Stratix V Devices
28-nm TSMC process
0.85-V or 0.9-V
Low-power serial transceivers
transceivers on Stratix V GT devices
dispersion compensation (EDC) for XFP, SFP+, QSFP, CFP optical module support
and decision feedback equalization
pre-emphasis and de-emphasis
reconfiguration of individual channels
instrumentation (EyeQ non-intrusive data eye monitoring)
second (Mbps) to 12.5-Gbps data rate capability
1.2-V to 3.3-V
interfacing for all Stratix V devices
Embedded HardCopy Block
PCIe Gen3, Gen2,
and Gen1 complete protocol stack, x1/x2/x4/x8 end point and root port
Embedded transceiver hard IP
physical coding sublayer (PCS)
(GbE) and XAUI PCS
10G Ethernet PCS
RapidIO® (SRIO) PCS
Radio Interface (CPRI) PCS
Optical Networking (GPON) PCS
integrated PowerPlay Power Analysis
High-performance core fabric
Enhanced ALM with
architecture reduces congestion and improves compile times
Embedded memory blocks
M20K: 20-Kbit with
hard error correction code (ECC)
Variable precision DSP blocks
Up to 600 MHz
signal processing with precision ranging from 9x9 up to 54x54
New native 27x27
and cascade for systolic finite impulse responses (FIRs)
of outputs allows more independent multipliers
with third-order delta-sigma modulation
synthesis, clock delay compensation, and zero delay buffer (ZDB)
and peripheral clock networks
networks can be powered down to reduce dynamic power
parallel flash interface
encryption standard (AES) design security features
densities with identical package footprints enables seamless migration between
different FPGA densities
with on-package decoupling capacitors
RoHS-compliant lead-free options
HardCopy V migration
Stratix V Family Plan
The following tables list the features of the different Stratix V devices.
The information in this section is correct at the time of publication. For the latest information and to get more details, refer to the Altera Product Selector.
Table 2. Stratix V GT Device Features
Logic Elements (K)
PCIe hard IP Blocks
M20K Memory Blocks
M20K Memory (MBits)
Variable Precision Multipliers (18x18)
Variable Precision Multipliers (27x27)
DDR3 SDRAM x72 DIMM Interfaces
User I/Os1, Full-Duplex LVDS, 28.05/12.5-Gbps Transceivers
1 The number of GPIOs does not include transceiver I/Os. In the Quartus II software, the number of user I/Os includes transceiver I/Os.
2 Packages are flipchip ball grid array (1.0-mm pitch).
3 Each package row offers pin migration (common board footprint) for all devices in the row.
4 Migration between select Stratix V GT devices and Stratix V GX devices is available. For more information, refer to Table 5 and to AN 644: Migration Between Stratix V GX and Stratix V GT Devices.
5 The F1517 package contains 24 PLLs. The other packages with this device contain 20 PLLs.
6 These are the maximum number of x72 interfaces available. The actual number of interfaces depends on the device package.
7 LVDS counts are full duplex channels. Each full duplex channel is one transmitter (TX) pair plus one receiver (RX) pair.
8 A superscript H after the number of transceivers indicates that this device is only available in a hybrid package. Hybrid packages are slightly larger than conventional FBGAs. Refer to Altera’s packaging documentation for more information.
9 Migration between select Stratix V GX devices and Stratix V GS devices is available. For more information, refer to Table 5.
10 All devices in this column are in the HF35 package and have twenty-four 14.1-Gbps transceivers.
11 Different devices within this column have small differences in the overall package height. When multiple Stratix V devices with different package heights are placed on a single board, a single-piece heatsink may not cover the devices evenly. Refer to AN 670: Thermal Solutions to Address Height Variation in Stratix V Packages.
12 The 5SGTC5/7 devices in the KF40 package have four 28.05-Gbps transceivers and thirty-two 12.5-Gbps transceivers. Other devices in this column are in the NF40 package and have forty-eight 14.1-Gbps transceivers.
13 For more information, refer to AN 644: Migration Between Stratix V GX and Stratix V GT Devices.
Low-Power Serial Transceivers
Stratix V FPGAs deliver the industry’s most flexible
transceivers with the highest bandwidth from 600 Mbps to 28.05 Gbps, low bit
error ratio (BER), and low power.
Stratix V transceivers have many enhancements to improve
flexibility and robustness. These enhancements include robust analog receiver
clock and data recovery (CDR), advanced pre-emphasis, and equalization. In
addition, each channel provides full featured embedded PCS hard IP to simplify
the design, lower the power, and save valuable core resources.
Stratix V transceivers are compliant with a wide range of standard
protocols and data rates and are equipped with a variety of signal conditioning
features to support backplane, optical module, and chip-to-chip applications.
Stratix V transceivers are located on the left and right sides of the
device, as shown in the figure below. The transceivers are isolated from the
rest of the chip to prevent core and I/O noise from coupling into the
transceivers, thereby ensuring optimal signal integrity. The transceiver
channels consist of the physical medium attachment (PMA), PCS, and high-speed
clock networks. You can also configure unused transceiver PMA channels as
additional transmitter PLLs.
Figure 1. Stratix V GT, GX, and GS Device Chip View.
This figure represents one variant of a Stratix V device with
transceivers. Other variants may have a different floorplan than the one shown
The following table lists the PMA features for the Stratix V
Table 7. Transceiver PMA Features
28.05 Gbps and 12.5 Gbps (Stratix V GT devices) and 14.1 Gbps
(Stratix V GX and GS devices)
12.5 Gbps (Stratix V GX, GS, and GT devices)
Cable driving support
PCIe cable and eSATA applications
Optical module support with EDC
10G Form-factor Pluggable (XFP), Small Form-factor Pluggable
(SFP+), Quad Small Form-factor Pluggable (QSFP), CXP, 100G Pluggable (CFP),
100G Form-factor Pluggable
Continuous Time Linear Equalization (CTLE)
Receiver 4-stage linear equalization to support
Decision Feedback Equalization (DFE)
Receiver 5-tap digital equalizer to minimize losses and
Adaptive equalization (AEQ)
Adaptive engine to automatically adjust equalization to
compensate for changes over time
PLL-based clock recovery
Superior jitter tolerance versus phase interpolation
Programmable deserialization and word alignment
Flexible deserialization width and configurable word alignment
Transmitter equalization (pre-emphasis)
Transmitter driver 4-tap pre-emphasis and de-emphasis for
protocol compliance under lossy conditions
Ring and LC oscillator transmitter PLLs
Choice of transmitter PLLs per channel, optimized for specific
protocols and applications
On-chip instrumentation (EyeQ data-eye monitor)
Allows non-intrusive on-chip monitoring of both width and
height of the data eye
Allows reconfiguration of single channels without affecting
operation of other channels
Compliance with over 50 industry standard protocols in the
range of 600 Mbps to 28.05 Gbps
The Stratix V core logic connects to the PCS through an 8-, 10-, 16-,
20-, 32-, 40-, 64-, or 66-bit interface, depending on the transceiver data rate
and protocol. Stratix V devices contain PCS hard IP to support PCIe Gen3, Gen2,
Gen1, Interlaken, 10GE, XAUI, GbE, SRIO, CPRI, and GPON protocols. All other
standard and proprietary protocols are supported through the transceiver PCS
hard IP. The following table lists the transceiver PCS features.
Same as custom PHY plus XAUI state machine for bonding four
Same as custom PHY plus XAUI state machine for re-aligning
1.25 to 6.25
Same as custom PHY plus SRIO V2.1 compliant x2 and x4 channel
Same as custom PHY plus SRIO V2.1compliant x2 and x4 deskew
0.6144 to 9.83
Same as custom PHY plus TX deterministic latency
Same as custom PHY plus RX deterministic latency
1.25, 2.5, and 10
Same as custom PHY
Same as custom PHY
PCIe Gen3, Gen2, and Gen1 Hard IP (Embedded HardCopy Block)
Stratix V devices have PCIe hard IP designed for performance,
ease-of-use, and increased functionality.
The PCIe hard IP consists of the PCS, data link, and
transaction layers. The PCIe hard IP supports Gen3, Gen2, and Gen1 end point
and root port up to x8 lane configurations.
The Stratix V PCIe hard IP operates independently from the core logic,
which allows the PCIe link to wake up and complete link training in less than
100 ms while the Stratix V device completes loading the programming file for
the rest of the FPGA. The PCIe hard IP also provides added functionality, which
helps support emerging features such as Single Root I/O Virtualization (SR-IOV)
or optional protocol extensions. In addition, the Stratix V device PCIe hard IP
has improved end-to-end data path protection using ECC and enables device CvP.
In all Stratix V devices, the primary PCIe hard IP that supports CvP
is always in the bottom left corner of the device (IOBANK_B0L) when viewing the
die from the top.
External Memory and GPIO
Each Stratix V I/O block has a hard FIFO that improves the
resynchronization margin as data is transferred from the external memory to the
The hard FIFO also lowers PHY latency, resulting in higher random
access performance. GPIOs include on-chip dynamic termination to reduce the
number of external components and minimize reflections. On-package decoupling
capacitors suppress noise on the power lines, which reduce noise coupling into
the I/Os. Memory banks are isolated to prevent core noise from coupling to the
output, thus reducing jitter and providing optimal signal integrity.
The external memory interface block uses advanced calibration
algorithms to compensate for process, voltage and temperature (PVT) variations
in the FPGA and external memory components. The advanced algorithms ensure
maximum bandwidth and a robust timing margin across all conditions. Stratix V
devices deliver a complete memory solution with the High Performance Memory
Controller II (HPMC II) and UniPHY
MegaCore® IP that simplifies a design for today’s
advanced memory modules. The following table lists external memory interface
Table 9. External Memory Interface Performance. The specifications listed in this table are performance targets.
For a current achievable performance, use the
External Memory Interface Spec Estimator.
Stratix V devices use an improved ALM to implement logic
functions more efficiently.
The Stratix V ALM has eight inputs with a fracturable look-up
table (LUT), two dedicated embedded adders, and four dedicated
The Stratix V ALM has the following enhancements:
Packs 6% more logic when
compared with the ALM found in Stratix IV devices.
Implements select 7-input
LUT-based functions, all 6-input logic functions, and two independent functions
consisting of smaller LUT sizes (such as two independent 4-input LUTs) to
optimize core usage.
Adds more registers (four
registers per 8-input fracturable LUT). More registers allow Stratix V devices
to maximize core performance at a higher core logic usage and provides easier
timing closure for register-rich and heavily pipelined designs.
The Quartus II software leverages the Stratix V ALM logic structure to
deliver the highest performance, optimal logic usage, and lowest compile times.
The Quartus II software simplifies design re-use because it automatically maps
legacy Stratix designs into the new Stratix V ALM architecture.
The Stratix V device core clock network is designed to support
800-MHz fabric operations and 1,066-MHz and 1,600-Mbps external memory
The clock network architecture is based on Altera’s proven global,
quadrant, and peripheral clock structure, which is supported by dedicated clock
input pins and fractional clock synthesis PLLs. The Quartus II software
identifies all unused sections of the clock network and powers them down, which
reduces power consumption.
Stratix V devices contain up to 32 fractional PLLs.
You can use the fractional PLLs to reduce both the number of
oscillators required on the board and the clock pins used in the FPGA by
synthesizing multiple clock frequencies from a single reference clock source.
In addition, you can use the fractional PLLs for clock network delay
compensation, zero delay buffering, and transmitter clocking for transceivers.
Fractional PLLs can be individually configured for integer mode or fractional
mode with third-order delta-sigma modulation.
Stratix V devices contain two types of embedded memory blocks:
MLAB (640-bit) and M20K (20-Kbit).
MLAB blocks are ideal for wide and shallow memories. M20K
blocks are useful for supporting larger memory configurations and include
Both types of memory blocks operate up to 600 MHz and can be
configured to be a single- or dual-port RAM, FIFO, ROM, or shift register.
These memory blocks are flexible and support a number of memory configurations,
as shown in the following table.
Table 10. Embedded Memory Block Configuration
MLAB (640 Bits)
M20K (20,480 Bits)
The Quartus II software simplifies design re-use by automatically
mapping memory blocks from legacy Stratix devices into the Stratix V memory
Variable Precision DSP Block
Stratix V FPGAs feature the industry’s first variable precision
DSP block that you can configure to natively support signal processing with
precision ranging from 9x9 to 36x36.
You can independently configure each DSP block at compile time as
either a dual 18x18 multiply accumulate or a single 27x27 multiply accumulate.
With a dedicated 64-bit cascade bus, you can cascade multiple variable
precision DSP blocks to implement even higher precision DSP functions
efficiently. The following table describes how variable precision is
accommodated within a DSP block or by using multiple blocks.
High precision fixed or single precision floating point
2 variable precision DSP blocks
Very high precision fixed point
Complex multiplication is common in DSP algorithms. One of the most
popular applications of complex multipliers is the fast Fourier transform (FFT)
algorithm, which increases precision requirements on only one side of the
multiplier. The variable precision DSP block is designed to support the FFT
algorithm with a proportional increase in DSP resources with precision growth.
The following table lists complex multiplication with variable precision DSP
Table 12. Complex Multiplication with Variable Precision DSP Blocks
Multiplier Size (bits)
DSP Block Resources
2 variable precision DSP blocks
Resource optimized FFTs
3 variable precision DSP blocks
Accommodate bit growth through FFT stages
4 variable precision DSP blocks
Highest precision FFT stages
4 variable precision DSP blocks
Single precision floating point
For FFT applications with high dynamic range requirements, only the
Altera® FFT MegaCore offers an option of single
precision floating point implementation, with the resource usage and
performance similar to high-precision fixed point implementations.
Other new features include:
64-bit accumulator, the
largest in the industry
Hard pre-adder, available
in both 18- and 27-bit modes
Cascaded output adders for
efficient systolic FIR filters
Efficient support for
single- and double-precision floating point arithmetic
Ability to infer all the
DSP block modes through HDL code using the Altera Complete Design Suite
The variable precision DSP block is ideal for higher bit precision in
high-performance DSP applications. At the same time, the variable precision DSP
block can efficiently support the many existing 18-bit DSP applications, such
as high definition video processing and remote radio heads. Stratix V FPGAs,
with the variable precision DSP block architecture, are the only FPGA family
that can efficiently support many different precision levels, up to and
including floating point implementations. This flexibility results in increased
system performance, reduced power consumption, and reduced architecture
constraints for system algorithm designers.
Stratix V devices leverage FPGA architectural features and
process technology advancements to reduce total power consumption by up to 30%
when compared with Stratix IV devices at the same performance level.
Stratix V devices continue to provide programmable power technology,
introduced in earlier generations of Stratix FPGA families. The Quartus II
software PowerPlay feature identifies critical timing paths in a design and
biases core logic in that path for high performance. PowerPlay also identifies
non-critical timing paths and biases core logic in that path for low power
instead of high performance. PowerPlay automatically biases core logic to meet
performance and optimize power consumption.
Additionally, Stratix V devices have a number of hard IP blocks that
reduce logic resources and deliver substantial power savings when compared with
soft implementations. The list includes PCIe Gen1/Gen2/Gen3, Interlaken PCS,
hard I/O FIFOs, and transceivers. Hard IP blocks consume up to 50% less power
than equivalent soft implementations.
Stratix V transceivers are designed for power efficiency. The
transceiver channels consume 50% less power than Stratix IV FPGAs. The
transceiver PMA consumes approximately 90 mW at 6.5 Gbps and 170 mW at
The Quartus II software incremental compilation feature reduces
compilation time by up to 70% and preserves performance to ease timing closure.
Incremental compilation supports top-down, bottom-up, and team-based
design flows. Incremental compilation facilitates modular hierarchical and
team-based design flows where a team of designers work in parallel on a design.
Different designers or IP providers can develop and optimize different blocks
of the design independently, which you can then import into the top-level
Enhanced Configuration and CvP
Stratix V device configuration is enhanced for ease-of-use,
speed, and cost.
Stratix V devices support a new 4-bit bus active serial mode (ASx4).
ASx4 supports up to a 400Mbps data rate using small low-cost quad interface
Flash devices. ASx4 mode is easy to use and offers an ideal balance between
cost and speed. Finally, the fast passive parallel (FPP) interface is enhanced
to support 8-, 16-, and 32-bit data widths to meet a wide range of performance
and cost goals.
You can configure Stratix V FPGAs using CvP with PCIe. CvP with PCIe
divides the configuration process into two parts: the PCIe hard IP and
periphery and the core logic fabric. CvP uses a much smaller amount of external
memory (flash or ROM) because CvP has to store only the configuration file for
the PCIe hard IP and periphery. The 100-ms power-up to active time (for PCIe)
is much easier to achieve when only the PCIe hard IP and periphery are loaded.
After the PCIe hard IP and periphery are loaded and the root port is booted up,
application software running on the root port can send the configuration file
for the FPGA fabric across the PCIe link where the file is loaded into the
FPGA. The FPGA is then fully configured and functional.
The following table lists the configuration modes available for
Stratix V devices.
Table 13. Configuration Modes for Stratix V Devices
14 Remote update support with the Parallel Flash
15 The maximum clock rate is 125 MHz for x8
and x16 FPP, but only 100 MHz for x32 FPP.
Partial reconfiguration allows you to reconfigure part of the
FPGA while other sections continue to operate.
This capability is required in systems where uptime is critical
because partial reconfiguration allows you to make updates or adjust
functionality without disrupting services. While lowering power and cost,
partial reconfiguration also increases the effective logic density by removing
the necessity to place FPGA functions that do not operate simultaneously.
Instead, you can store these functions in external memory and load them as
required. This capability reduces the size of the FPGA by allowing multiple
applications on a single FPGA, saving board space and reducing power.
You no longer need to know all the details of the FPGA architecture to
perform partial reconfiguration. Altera simplifies the process by extending the
power of incremental compilation used in earlier versions of the Quartus II
Partial reconfiguration is supported in the following configurations:
through the FPP x16 I/O interface
Soft internal core, such
Nios® II processor.
Automatic Single Event Upset Error Detection and Correction
Stratix V devices offer single event upset (SEU) error detection
and correction circuitry that is robust and easy to use.
The correction circuitry includes protection for configuration RAM
(CRAM) programming bits and user memories. The CRAM is protected by a
continuously running cyclical redundancy check (CRC) error detection circuit
with integrated ECC that automatically corrects one or double-adjacent bit
errors and detects higher order multi-bit errors. When more than two errors
occur, correction is available through a core programming file reload that
refreshes a design while the FPGA is operating.
The physical layout of the FPGA is optimized to make the majority of
multi-bit upsets appear as independent single- or double-adjacent bit errors,
which are automatically corrected by the integrated CRAM ECC circuitry. In
addition to the CRAM protection in Stratix V devices, user memories include
integrated ECC circuitry and are layout-optimized to enable error detection of
3-bit errors and correction for 2-bit errors.
HardCopy V Devices
HardCopy V ASICs offer the lowest risk and lowest total cost in
ASIC designs with embedded high-speed transceivers.
You can prototype and debug with Stratix V FPGAs, then use
HardCopy V ASICs for volume production. The proven turnkey process creates a
functionally equivalent HardCopy V ASIC with or without embedded transceivers
to meet all timing constraints in as little as 12 weeks.
The powerful combination of Stratix V FPGAs and HardCopy V ASICs can
help you meet your design requirements. Whether you plan for ASIC production
and require the lowest-risk, lowest-cost path from specification to production
or require a cost reduction path for your FPGA-based systems, Altera provides
the optimal solution for power, performance, and device bandwidth.
This section describes ordering information for Stratix V GT, GX,
GS, and E devices.
The following figure shows the ordering codes for Stratix V devices.
Figure 2. Ordering Information for Stratix V Devices
Document Revision History
Table 14. Document Revision History
Changed heading in the "Ordering Information for
Stratix V Devices" figure to "Embedded Hard IP Block
Added ALM counts and device package sizes to the four device family features tables.
In the "Stratix V GX Device Features" table, changed the number of DDR3 SDRAM x72 DIMM Interfaces for the 5SGXA3 and 5SGXA4
devices to 6. Also added footnote to this row.
Deleted listings for 40GBASE-R and 100GBASE-R Ethernet from the "Transceiver PCS Features" table in the "Low-Power Serial
Added YY code to the Optional Suffix category in the "Ordering Information for Stratix V Devices" figure.
Updated "Variable precision DSP blocks" section of the
"Features Summary" table to 600 MHz performance.
section of the "Features Summary" table to 1.6 Gbps LVDS.
speed to 800 MHz in the "Features Summary" and the "Clocking" sections.
Added link to
Altera Product Selector in the "Stratix V Family Plan" section.
533 MHz to
Migration List Across All Stratix V Device Variants" table.
Added link to the
known document issues in the Knowledge Base.
Added a note about
the number of I/Os to each table in the "Stratix V Family Plan" section.
"Ordering Information for Stratix V Devices" figure.
Updated Table 6
and Table 13.
Updated Figure 2.
to stand-alone format and removed from the Stratix V handbook.
Changed title of
document to Stratix V Device Overview
Updated Figure 1.
Minor text edits.
Updated Table 1–2,
Table 1–3, Table 1–4, and Table 1–5.
Single Event Upset Error Detection and Correction” on page 18.
Minor text edits.
Updated Table 1–2 and Table 1–3.
Changed Stratix V
GT transceiver speed from 28 Gbps to 28.05 Gbps.