AMD XC3S500E-4PQG208I

Overview

XC3S500E-4PQG208I from AMD (formerly Xilinx) is a Spartan-3E FPGA with 500,000 system gates, 11,200 logic cells, and embedded block RAM totaling 360 kbits. It operates at -4 speed grade (4.9 ns CLB delay), supports LVCMOS/LVTTL I/O standards, and is packaged in a 208-pin PQFP. It is used in industrial motor control interface modules requiring deterministic timing and reconfigurable logic.

For engineers reviewing the XC3S500E-4PQG208I datasheet, pinout, applications, or equivalent options, key selection criteria include logic density, I/O count (141 user I/Os), embedded RAM capacity, speed grade timing compliance, and PQFP thermal and routing constraints for cost-sensitive industrial designs.

Technical Context

The XC3S500E-4PQG208I implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, and dedicated multipliers. It includes eight global clock networks and supports SelectIO™ technology for single-ended and differential signaling up to 333 Mbps.

It integrates 22 dedicated digital clock managers (DCMs) for phase-matched clock synthesis, jitter reduction, and frequency synthesis - enabling precise clock domain crossing in servo drive feedback loops and encoder interface subsystems.

Key Specifications

Pinout & Package

XC3S500E-4PQG208I is housed in a 208-pin Plastic Quad Flat Pack (PQFP) with 0.5 mm pitch, 28 × 28 mm body size, and JEDEC-standard thermal profile suitable for convection-cooled industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3S500E-4PQG208I, XC3S400-4PQ208C offers lower cost and power at reduced logic density and memory, while XC3S1000-4PQG208I delivers headroom for feature expansion but requires careful thermal and configuration memory planning.

Availability

XC3S500E-4PQG208I is available at Aetrix Electronics and suitable for industrial motor control, PLC expansion, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for XC3S500E-4PQG208I 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 FPGA family for cost-optimized, high-volume industrial applications.

The Spartan-3E family was designed specifically for high-gate-count, low-cost reconfigurable logic in industrial automation, test instrumentation, and embedded vision systems.

FAQ

What is the operating temperature range for XC3S500E-4PQG208I?

The XC3S500E-4PQG208I is rated for industrial temperature operation from –40°C to +100°C ambient, validated per Xilinx DS312 specification. This range ensures reliable functionality in motor control cabinets, factory-floor PLC enclosures, and outdoor test equipment housings where passive cooling is used. The PQG208 package's thermal resistance (θ_JA = 36.5°C/W) supports this rating under defined airflow conditions.

Does XC3S500E-4PQG208I support JTAG boundary-scan testing?

Yes, XC3S500E-4PQG208I fully supports IEEE 1149.1 JTAG boundary-scan for PCB-level interconnect testing and in-system programming. Its TAP controller implements mandatory instructions (SAMPLE/PRELOAD, EXTEST, BYPASS) and device-specific instructions (ISC_ENABLE, ISC_PROGRAM). JTAG pins (TCK, TMS, TDI, TDO) are dedicated and electrically isolated from user I/O banks.

How many configuration modes does XC3S500E-4PQG208I support?

XC3S500E-4PQG208I supports three primary configuration modes: Master Serial (using on-board SPI PROM), Slave Serial (driven by external processor), and JTAG (for debugging and programming). Mode selection is controlled by M2:M0 pins at power-up, and all modes use the same 1.2 V core voltage and configuration bitstream format defined in Xilinx UG332.

Can XC3S500E-4PQG208I implement a UART peripheral with hardware flow control?

Yes, XC3S500E-4PQG208I can implement a full-duplex UART with RTS/CTS hardware flow control using its LUT-based logic and block RAM for TX/RX FIFOs. Reference designs in Xilinx Application Note XAPP225 demonstrate 115.2 kbps operation with ±1% baud accuracy using DCM-derived clocks, leveraging the device's 141 I/Os for signal routing and level translation.

Is XC3S500E-4PQG208I compatible with Xilinx ISE Design Suite 14.7?

Yes, XC3S500E-4PQG208I is fully supported in Xilinx ISE Design Suite 14.7, including synthesis, place-and-route, timing analysis, and bitstream generation. Device-specific libraries, simulation models (VHDL/Verilog), and constraint editors for PQG208 pin mapping are included. No newer toolchain is required for legacy design maintenance or re-spin projects.