AMD XC6SLX16-3FT256I

Overview

XC6SLX16-3FT256I from AMD (formerly Xilinx) is a Spartan-6 FPGA featuring 14,579 logic cells, 576 Kbits of block RAM, and 186 user I/Os in a 256-pin FTBGA package. It operates at -3 speed grade (1.2 V core, industrial temperature range -40°C to +100°C) and targets cost-sensitive embedded control and interface bridging applications.

For engineers reviewing the XC6SLX16-3FT256I datasheet, pinout, applications, or equivalent options, key selection factors include I/O count, block RAM depth, speed grade timing margins, industrial temperature support, and FTBGA256 mechanical compatibility.

Technical Context

The XC6SLX16-3FT256I implements a hierarchical FPGA architecture with six-input LUTs, distributed RAM, and dedicated DSP48A1 slices supporting 18×18-bit multiply-accumulate operations. It integrates dual 10-bit ADCs and supports SelectIO standards including LVCMOS, LVDS, and SSTL.

Configuration is performed via Master SPI or JTAG, with bitstream encryption and CRC error checking enabled. The device supports partial reconfiguration and includes integrated clock management with DCMs for frequency synthesis and phase alignment.

Key Specifications

Pinout & Package

XC6SLX16-3FT256I is housed in a 17 mm × 17 mm, 1.0 mm pitch FTBGA256 package with 186 user-configurable I/O pins, 10 dedicated configuration pins (including M0–M2, INIT_B, PROGRAM_B, CCLK, DIN, DOUT, DONE), and 8 power/ground pairs for core and I/O banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6SLX16-3FT256I, XC6SLX25-3FT256I offers headroom for future feature expansion within identical thermal and mechanical constraints, while XC6SLX16-2FT256C reduces BOM cost and power in ambient-controlled settings but sacrifices industrial reliability.

Availability

XC6SLX16-3FT256I is available at Aetrix Electronics and suitable for industrial automation, automotive diagnostics, medical imaging subsystems, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for XC6SLX16-3FT256I 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 and continues development and support of the Spartan-6 FPGA family for cost-optimized, low-power programmable logic solutions.

The Spartan-6 family was designed for high-volume embedded applications requiring flexible I/O, moderate logic density, and industrial-grade reliability-particularly in industrial control, video processing, and communications infrastructure.

FAQ

What is the maximum supported DDR3 memory interface speed for XC6SLX16-3FT256I?

The XC6SLX16-3FT256I supports DDR3 SDRAM interfaces up to 667 Mbps data rate (333 MHz clock) when operating at the -3 speed grade. This is validated in Xilinx UG382 and confirmed by timing analysis tools targeting the FTBGA256 package. The XC6SLX16-3FT256I achieves this using its dedicated I/O logic and DCM-based clocking architecture.

Does XC6SLX16-3FT256I support JTAG boundary-scan testing?

Yes, XC6SLX16-3FT256I fully supports IEEE 1149.1 JTAG boundary-scan for PCB-level interconnect testing. Its TAP controller implements mandatory instructions (SAMPLE/PRELOAD, EXTEST, BYPASS) and optional IDCODE. The XC6SLX16-3FT256I uses dedicated TCK, TMS, TDI, and TDO pins routed to the FTBGA256 package corners for robust scan chain integration.

Can XC6SLX16-3FT256I be configured via SPI flash without external microcontroller assistance?

Yes, XC6SLX16-3FT256I supports Master SPI configuration mode, allowing autonomous boot from standard SPI NOR flash devices like Micron MT25QL series. In this mode, the XC6SLX16-3FT256I drives the SPI clock and reads configuration data directly after power-up, eliminating need for external controllers or firmware.

What is the purpose of the dual 10-bit ADCs in XC6SLX16-3FT256I?

The dual 10-bit ADCs in XC6SLX16-3FT256I provide on-die analog monitoring of internal supply voltages (VCCINT, VCCAUX) and external signals such as board temperature or sensor outputs. They operate independently at up to 1 MSPS and interface directly to FPGA logic via AXI-Stream, enabling real-time health monitoring without external converters.

Is XC6SLX16-3FT256I pin-compatible with other Spartan-6 devices in FTBGA256 package?

XC6SLX16-3FT256I shares the same FTBGA256 footprint and pinout with XC6SLX25-3FT256I and XC6SLX45-3FT256I, enabling scalable logic density upgrades on identical PCBs. However, unused I/O pins differ between variants, so designs must constrain only the XC6SLX16-3FT256I's 186 user I/Os to ensure functional compatibility.