AMD XC2S50-5PQG208I

Overview

XC2S50-5PQG208I from AMD (formerly Xilinx) is a Spartan-II family FPGA with 50,000 system gates, 117 I/O pins, and a 5 ns input/output delay specification. It features configurable logic blocks (CLBs), distributed RAM, and dedicated carry logic, deployed in industrial control systems requiring reconfigurable digital logic.

For engineers reviewing the XC2S50-5PQG208I datasheet, pinout, applications, or equivalent options, key selection factors include I/O count, propagation delay, operating temperature range, configuration interface type, and package thermal characteristics.

Technical Context

The XC2S50-5PQG208I implements a fine-grained, SRAM-based architecture with 1728 configurable logic blocks and up to 24 Kbits of distributed RAM. Its I/O structure supports LVCMOS, LVTTL, and PCI-compliant signaling standards with programmable slew rate and drive strength.

Configuration occurs via serial mode using an external PROM or parallel slave mode with a microprocessor. The device requires external power sequencing: VCCINT = 2.5 V ± 3%, VCCO = 3.3 V ± 5%, and supports JTAG boundary-scan testing per IEEE 1149.1.

Key Specifications

Pinout & Package

PQG208 is a 208-pin plastic quad flat pack (PQFP) with 0.5 mm lead pitch, 28 × 28 mm body size, and an exposed thermal pad on the underside for enhanced heat dissipation in sustained logic operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC2S50-5PQG208I, the XC2S50-6PQ208C offers lower cost but sacrifices industrial temperature support and 1 ns timing margin, while the XC3S50-4PQ208I provides architectural improvements at the expense of compatibility and board-level redesign effort.

Availability

XC2S50-5PQG208I is available at Aetrix Electronics and suitable for industrial motion control, automated test equipment, and medical imaging interface applications requiring stable component supply across extended product lifecycles.

Supply support for XC2S50-5PQG208I 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, adaptive SoCs, and AI engines for heterogeneous compute acceleration.

The Spartan-II family, including XC2S50-5PQG208I, was originally designed for cost-sensitive, high-volume embedded logic applications requiring reconfigurable digital functionality with industrial-grade reliability.

FAQ

What is the maximum operating frequency supported by the XC2S50-5PQG208I?

The XC2S50-5PQG208I does not specify a single maximum clock frequency due to architecture-dependent path delays. Its 5 ns input-to-output propagation delay enables internal logic paths to operate reliably at system clock frequencies up to approximately 125 MHz under typical conditions, assuming proper timing closure and placement constraints during synthesis and place-and-route.

Does the XC2S50-5PQG208I require external configuration memory?

Yes, the XC2S50-5PQG208I is SRAM-based and loses its configuration upon power loss. It requires external non-volatile memory (e.g., Xilinx XC18V02 or compatible PROM) to store the bitstream, which is loaded automatically at power-up in master serial mode or triggered manually via PROGRAM_B.

Can the XC2S50-5PQG208I operate with a single 3.3 V supply?

No. The XC2S50-5PQG208I requires two separate supply rails: 2.5 V ± 3% for the core logic (VCCINT) and 3.3 V ± 5% for I/O banks (VCCO). Using only 3.3 V on VCCINT will exceed absolute maximum ratings and cause functional failure or permanent damage.

Is JTAG debugging supported on the XC2S50-5PQG208I?

Yes, the XC2S50-5PQG208I fully supports IEEE 1149.1 JTAG boundary-scan through dedicated TCK, TMS, TDI, and TDO pins. This enables in-circuit programming, configuration verification, and interconnect testing without requiring additional debug hardware beyond a standard JTAG adapter.

What package variant does PQG208 indicate for the XC2S50-5PQG208I?

PQG208 denotes a 208-pin plastic quad flat pack with gull-wing leads, 0.5 mm pitch, and an exposed thermal pad on the underside. The "G" suffix specifically identifies the thermally enhanced version optimized for improved heat dissipation in sustained logic operation compared to standard PQFP variants.