AMD XC3S1000-5FG320C

Overview

XC3S1000-5FG320C from AMD (formerly Xilinx) is a Spartan-3 FPGA with 1,000,000 system gates, 17,280 logic cells, and 128 I/O pins in a 320-pin Fine-Pitch Ball Grid Array (FBGA) package. It operates at -5 speed grade (4 ns CLB delay), supports SelectIO™ standards up to 622 Mbps, and targets high-volume embedded control and interface bridging applications.

For engineers reviewing the XC3S1000-5FG320C datasheet, pinout, applications, or equivalent options, key selection factors include I/O voltage flexibility (1.2 V to 3.3 V), distributed RAM capacity (720 Kbits), and support for DDR/DDR2 SDRAM interfaces in cost-sensitive industrial designs.

Technical Context

The XC3S1000-5FG320C implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), block RAM (18 Kbits × 40), and dedicated digital clock managers (DCMs) providing phase-matched clock synthesis and jitter reduction. It integrates 8 global clock networks and supports internal configuration via Master Serial or JTAG modes.

It features SelectIO™ technology enabling single-ended standards (LVTTL, LVCMOS) and differential standards (LVDS, RSDS) on the same bank, with programmable slew rate and drive strength per I/O. Configuration is performed through external PROM or processor-controlled slave parallel mode.

Key Specifications

Pinout & Package

XC3S1000-5FG320C is housed in a 320-pin Fine-Pitch Ball Grid Array (FBGA) package with 20 × 20 array, 0.8 mm pitch, and 27 mm × 27 mm body size. Thermal pad is not present; package is RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3S1000-5FG320C, the -4 variant trades timing performance for lower power and cost, while the -1500 variant retains pin compatibility and speed but adds logic capacity-making both viable for incremental design evolution rather than drop-in replacement.

Availability

XC3S1000-5FG320C is available at Aetrix Electronics and suitable for industrial motion control, legacy bus interface bridging, and video signal formatting requiring stable component supply and long-term manufacturing continuity.

Supply support for XC3S1000-5FG320C 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 now develops adaptive computing platforms including FPGAs, ACAPs, and software tools for heterogeneous acceleration.

The Spartan-3 family, including XC3S1000-5FG320C, was designed for cost-sensitive, high-volume applications requiring reconfigurable logic with predictable timing and low-power operation in industrial and embedded systems.

FAQ

What is the maximum operating frequency supported by XC3S1000-5FG320C?

The XC3S1000-5FG320C has a -5 speed grade specifying a 4 ns CLB propagation delay, enabling reliable operation at 250 MHz system clock frequency. Actual achievable frequency depends on design routing, resource utilization, and I/O timing constraints. The device includes four Digital Clock Managers (DCMs) that support frequency multiplication up to 320 MHz for internal logic domains.

Does XC3S1000-5FG320C support JTAG boundary-scan testing?

Yes, XC3S1000-5FG320C fully supports IEEE 1149.1 JTAG boundary-scan testing via dedicated TCK, TMS, TDI, and TDO pins. JTAG is used for device programming, debugging, and interconnect verification. The TDO pin is three-state controlled by TMS, and the JTAG chain can include multiple Xilinx devices sharing the same test access port.

Can XC3S1000-5FG320C be configured using an external microcontroller?

Yes, XC3S1000-5FG320C supports Slave Parallel configuration mode, allowing an external microcontroller to load the bitstream via its data bus and control signals (e.g., INIT_B, PROGRAM_B, DONE). This enables field updates and dynamic reconfiguration without requiring dedicated PROM or serial flash memory.

What I/O standards are supported by XC3S1000-5FG320C?

XC3S1000-5FG320C supports single-ended standards including LVTTL, LVCMOS (1.2 V to 3.3 V), and PCI, plus differential standards LVDS and RSDS. Each I/O bank is independently configurable for voltage level and standard. Termination resistors are not integrated; external termination is required for differential signaling.

Is XC3S1000-5FG320C still in active production?

XC3S1000-5FG320C is no longer in active production by AMD/Xilinx but remains available through authorized distributors and Aetrix Electronics' extended lifecycle program. Obsolescence mitigation includes verified second-source alternatives, long-term inventory holding, and engineering support for migration paths to Spartan-6 or Artix-7 families.