XC7K410T FPGA: Pinout, I/O Banks and Package Selection

February 21, 2026 · Published by WWDParts

XC7K410T combines 406,720 logic cells with a maximum of 500 ordinary user I/O and 16 GTX serial lanes. The package changes how many of those interfaces reach the board. A 410T design therefore needs a bank-and-pin budget as well as a logic-utilization budget. This guide focuses on that decision, including the difference between the 676-ball and 900-ball options.

Device resources and package choices

CLB slices / LUTs / registers	63,550 / 254,200 / 508,400
DSP48E1 slices	1,540
Block RAM	795 blocks of 36 Kb; 28,620 Kb total
Clock management / PCIe	10 CMTs; one PCIe block supporting up to x8 Gen2
FBG676 or FFG676	400 user I/O: 250 HR + 150 HP; 8 GTX; 27 × 27 mm
FBG900 or FFG900	500 user I/O: 350 HR + 150 HP; 16 GTX; 31 × 31 mm

Resource and package references: AMD 7 Series Overview, DS180 v2.6.1 Tables 6–7 and AMD CLB Resources, UG474 v1.9. The 63,550 figure counts slices, not CLBs. DS180 does not list XC7K410T in FFG1156. Do not infer an extra package option or 600 user I/O from a different Kintex-7 device.

Plan bank voltages before assigning pins

HR and HP banks are not interchangeable. DS180 gives HR voltage support from 1.2 to 3.3 V and HP support from 1.2 to 1.8 V; the chosen I/O standard imposes more specific requirements. AMD SelectIO Resources, UG471 lists the supported standards and their VCCO, VREF and termination conditions. A bank supply does not act as an independent voltage converter on each pin.

Consider a preliminary board requirement of 180 single-ended 3.3 V output signals and 120 single-ended 1.8 V output signals. A 676-ball option has enough HR and HP capacity for these raw totals: allocating the former to HR leaves 70 HR pins, while allocating the latter to HP leaves 30 HP pins. The arithmetic does not prove the pin plan. Clocks, configuration use, reference pins, bank placement and other interfaces can consume or constrain the apparent remainder.

Create a pin-plan worksheet with one row per signal group: direction, I/O standard, supply, clock source, required bank and pin count. Import the assignments into Vivado and resolve I/O compatibility checks before routing the PCB. If the design also needs twelve GTX lanes, the 676-ball option fails that independent requirement despite passing the preliminary parallel-I/O count; a listed 900-ball option exposes sixteen.

A shared footprint does not imply the same serial rate

FBG900 and FFG900 expose the same lane count in the overview, but their electrical limits differ. AMD Kintex-7 Electrical Characteristics, DS182 v2.19 Table 56 limits FBG900 to 6.6 Gb/s. The 12.5 Gb/s figure applies to the specified -3 FF conditions, with the associated transceiver-supply requirement. The full order code, package and electrical table must all agree with the intended link rate.

Use the exact AMD Kintex-7 package and pinout files for the ball assignment. Package balls include supplies and dedicated functions, not just user signals. Do not add an exposed-pad connection or central ground slug to a BGA footprint on the basis of a generic thermal description. Follow the manufacturer package drawing and develop the cooling solution from the actual workload and board construction.

Memory and migration checks

The 28,620 Kb memory figure is the sum of physical block-RAM capacity. Width, depth and parity use determine the implemented capacity; AMD Memory Resources, UG473 v1.14 describes the available organizations. Record inferred RAM blocks after synthesis instead of treating the headline capacity as a flat byte-addressable buffer.

Moving to XC7K325T cannot be approved by a single utilization percentage. In particular, its 840 DSP slices are substantially fewer than the 410T’s 1,540. A hypothetical design using 1,000 DSP slices will not fit that smaller DSP budget even if LUT utilization is low. Check memory shapes, bank assignments, clocks and implemented timing as separate constraints; regenerate and validate the target bitstream.

Before releasing the board

Resolve the complete ordering code, including speed and temperature grade, and archive the exact pin file used.
Check every bank supply and I/O standard together, including configuration and startup conditions.
Implement the memory and serial interfaces for the selected device; verify timing and reset behavior under traffic.
Estimate power for the intended activity and then measure board temperatures. No fixed factory lead time or wattage follows from the device name.

Ordering and manufacturer references

Send the full XC7K410T ordering code, quantity, required delivery date and any packaging or documentation requirements through the WWDParts RFQ list. Price, availability and delivery terms are confirmed in the written quotation.

Technical content reviewed October 14, 2026. The budgets and validation steps here are engineering examples, not measured performance, qualification results or replacement approvals. Use the applicable manufacturer document revision and exact order code for design release.