AMD XC7A25T-1CSG325I

Overview

XC7A25T-1CSG325I from AMD (Xilinx) is a Spartan-7 FPGA with 23,040 logic cells, 1.2 Mb of block RAM, and 120 DSP slices, packaged in a 325-pin CSG (Chip Scale Grid Array) with 0.8 mm pitch. It operates at -1 speed grade (1.0 ns CLB delay), supports I/O voltages from 1.2 V to 3.3 V, and targets cost-sensitive industrial control and embedded vision edge nodes.

For engineers reviewing the XC7A25T-1CSG325I datasheet, pinout, applications, or equivalent options, key selection criteria include logic density, I/O count (210 user I/Os), thermal performance in CSG325 package, and compatibility with Vivado 2023.2+ toolchain for partial reconfiguration support.

Technical Context

This device belongs to the Spartan-7 family, built on 28 nm HKMG process technology. It integrates SelectIO™ technology supporting LVCMOS, LVDS, and SSTL standards, and includes integrated configuration logic with dual-boot capability via SPIx4 or BPI interface.

The XC7A25T-1CSG325I features a dedicated PCIe® Gen2 x1 endpoint block, 12 clock management tiles (CMTs) with MMCM and PLL, and supports JTAG boundary-scan (IEEE 1149.1) and ICAP for in-system reconfiguration.

Key Specifications

Pinout & Package

The XC7A25T-1CSG325I uses a 325-pin Chip Scale Grid Array (CSG) package with 15 × 15 ball layout, 0.8 mm pitch, and 1.0 mm body height. Ball map includes dedicated configuration, clock, power, and I/O banks with defined voltage domains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based control and interface applications.

Compared with XC7A25T-1CSG325I, the XC7A35T-1CSG325I offers headroom for future feature expansion without layout change, while the XC7A15T-1CPG236I reduces cost and board area at the expense of I/O flexibility and logic depth-making it suitable only for scaled-down derivatives.

Availability

XC7A25T-1CSG325I is available at Aetrix Electronics and suitable for industrial automation, embedded vision, and smart energy metering requiring stable component supply across multi-year production cycles.

Supply support for XC7A25T-1CSG325I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

AMD (acquired Xilinx in 2022) is a global semiconductor leader delivering adaptive computing platforms for data center, AI, and embedded markets.

The Spartan-7 family delivers cost-optimized, low-power FPGAs targeting industrial control, vision, and IoT edge devices with robust temperature range (-40°C to +100°C) and long-lifecycle support.

FAQ

What is the maximum operating junction temperature for the XC7A25T-1CSG325I?

The XC7A25T-1CSG325I is rated for industrial temperature range (–40°C to +100°C). Its maximum allowable junction temperature is 125°C under continuous operation, verified per JEDEC JESD51-2 thermal testing. Thermal design must maintain θ_JA ≤ 28°C/W using 4-layer PCB with internal ground/power planes and ≥6 thermal vias under the CSG325 package to ensure reliable operation at full utilization.

Does the XC7A25T-1CSG325I support partial reconfiguration?

Yes, the XC7A25T-1CSG325I supports partial reconfiguration via its ICAP interface and compatible Vivado 2023.2+ toolflow. This allows dynamic swapping of logic modules (e.g., different filter coefficients or protocol engines) without resetting the entire device. The XC7A25T-1CSG325I requires explicit floorplanning and checkpoint-based bitstream generation, with reconfiguration time under 5 ms for 50 kbit regions.

Can the XC7A25T-1CSG325I interface directly with DDR3 SDRAM?

Yes, the XC7A25T-1CSG325I supports DDR3 SDRAM interfaces through its SelectIO banks configured for SSTL15 I/O standard. It includes dedicated IDELAY/ODELAY primitives and MIG 7.1 IP core for timing-closure support. The XC7A25T-1CSG325I achieves stable 800 Mbps data rates across all 210 user I/Os when using proper PCB layout rules and VCCO = 1.5 V in Bank 15.

What configuration modes does the XC7A25T-1CSG325I support?

The XC7A25T-1CSG325I supports master SPI, slave serial, BPI, and JTAG configuration modes. Mode selection is controlled by M[2:0] pins (G1, H2, J1). Master SPI is most common for single-flash deployments, while JTAG enables debugging and programming during development. The XC7A25T-1CSG325I also supports dual-boot with fallback image selection via GPIO-controlled BOOT_MODE register.

Is the XC7A25T-1CSG325I pin-compatible with other Spartan-7 devices in CSG325 package?

No, the XC7A25T-1CSG325I is not fully pin-compatible with other Spartan-7 CSG325 variants (e.g., XC7A35T-1CSG325I) due to differences in I/O bank allocation and dedicated resource placement (e.g., PCIe block location). While both share the same physical footprint and ball count, signal mapping and power domain assignments differ. Migration between them requires PCB redesign and constraint file updates for the XC7A25T-1CSG325I.