AMD XC7A15T-3CSG325E

Overview

XC7A15T-3CSG325E from AMD (Xilinx) is a Spartan-7 FPGA featuring 15,824 logic cells, 1.2 Mb of block RAM, and 120 DSP slices, packaged in a 325-pin CSGA (Chip Scale Grid Array) with 0.8 mm pitch. It operates at -3 speed grade (fastest), 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 XC7A15T-3CSG325E datasheet, pinout, applications, or equivalent options, key selection factors include logic density, I/O count (210 user I/Os), thermal performance in CSGA packaging, and compatibility with Vivado 2023.2+ toolchain for partial reconfiguration support.

Technical Context

The XC7A15T-3CSG325E implements a 28 nm HKMG process-based architecture with integrated configuration memory, dual-register LUTs, and dedicated carry chains for arithmetic. It includes SelectIO technology supporting LVCMOS, LVDS, and SSTL standards across all banks.

Configuration is performed via Master SPI or JTAG, with bitstream encryption and HMAC authentication enabled. The device lacks integrated transceivers but supports source-synchronous interfaces up to 1.25 Gbps using IDELAY/ODELAY primitives and IODELAY2 blocks.

Key Specifications

Pinout & Package

The XC7A15T-3CSG325E uses a 325-pin Chip Scale Grid Array (CSGA) package with 19×19 ball array, including power, ground, configuration, and user I/O balls. Ball pitch is 0.8 mm; thermal pad is exposed on underside for PCB heat transfer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC7A15T-3CSG325E, the XC7A35T-3CSG325I offers scalability within identical footprint and thermal envelope, while the XC7A15T-2CSG325I trades timing performance for reduced power and cost-enabling tiered product variants from a single layout.

Availability

XC7A15T-3CSG325E is available at Aetrix Electronics and suitable for industrial automation, embedded vision, and motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for XC7A15T-3CSG325E 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 FPGA solutions targeting industrial, automotive, and consumer edge applications with robust I/O and security features.

FAQ

What is the maximum supported I/O standard voltage for XC7A15T-3CSG325E?

The XC7A15T-3CSG325E supports I/O standards from 1.2 V to 3.3 V across its 12 configurable I/O banks. Each bank has independent VCCO and reference voltage (VRN/VRP) settings, enabling mixed-voltage operation-e.g., interfacing with both 1.8 V sensors and 3.3 V legacy peripherals simultaneously on the same device.

Does XC7A15T-3CSG325E support JTAG boundary scan testing?

Yes, XC7A15T-3CSG325E fully supports IEEE 1149.1 JTAG boundary scan for PCB-level interconnect testing. Its TAP controller implements mandatory instructions (SAMPLE/PRELOAD, EXTEST, BYPASS) and device-specific IDCODE, enabling automated test fixture integration and manufacturing defect detection without requiring functional firmware.

Can XC7A15T-3CSG325E be configured via serial SPI flash?

Yes, XC7A15T-3CSG325E supports Master SPI configuration mode using industry-standard quad-SPI flash devices. The device boots directly from external flash upon power-up, with automatic fallback to JTAG if configuration fails-ensuring robust field deployment and remote firmware updates without requiring host processor intervention.

Is partial reconfiguration supported on XC7A15T-3CSG325E?

Yes, XC7A15T-3CSG325E supports partial reconfiguration through Vivado's PR flow. This allows dynamic replacement of logic modules (e.g., communication protocol engines or filter coefficients) while the rest of the design remains operational-enabling field-upgradable functionality in deployed XC7A15T-3CSG325E-based systems without system reset.

What thermal management guidance applies to XC7A15T-3CSG325E in CSGA packaging?

XC7A15T-3CSG325E in 325-pin CSGA requires a minimum 4-layer PCB with internal ground/power planes and thermal vias under the exposed thermal pad. AMD specifies 6–8 thermal vias (0.3 mm diameter, 0.5 mm pitch) connected to inner ground plane for ≤1.5 °C/W junction-to-board thermal resistance in natural convection environments.