AMD XC4005-5PQ208C

Overview

XC4005-5PQ208C from Xilinx is a third-generation Field-Programmable Gate Array (FPGA) with 5,000 usable gates, 196 Configurable Logic Blocks (CLBs), and 616 flip-flops, fabricated in sub-micron CMOS. It supports system clock rates up to 50 MHz and features on-chip RAM (6,272 bits), dedicated fast-carry logic, and eight global low-skew clock networks - used in high-speed digital signal processing and microprocessor peripheral interface designs.

For engineers reviewing the XC4005-5PQ208C datasheet, pinout, applications, or equivalent options, key selection criteria include its 208-pin PQFP package, -5 speed grade (5 ns CLB propagation delay), 112 I/O pins, IEEE 1149.1 boundary-scan support, and compatibility with XACT development tools for automatic placement and routing.

Technical Context

The XC4005-5PQ208C implements a symmetric CLB architecture with two independent 4-input function generators (F' and G') plus a third 3-input H' generator, enabling single-block implementation of 5–9 variable logic functions. Each CLB provides four outputs (X, Y, XQ, YQ) and dual edge-triggered D flip-flops with programmable asynchronous set/reset and clock-edge polarity.

Routing resources include eight global low-skew nets, double-length and single-length interconnect lines, and four edge-mounted wide decoders (up to 42 inputs per side). The device uses master/slave or peripheral configuration modes with CRC-protected bitstream loading and supports readback without flip-flop masking.

Key Specifications

Pinout & Package

XC4005-5PQ208C is housed in a 208-pin Plastic Quad Flat Package (PQFP) with 0.65 mm lead pitch, JEDEC MS-026 standard footprint, and thermal pad omitted. Package dimensions are 28 × 28 mm with 0.5 mm body thickness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4005-5PQ208C, the -6 variant trades 10 MHz clock headroom for lower cost and power, while the XC4005A-5PQ208C retains speed but reduces routing flexibility - both require no layout changes but differ in achievable logic density and signal fanout capability.

Availability

XC4005-5PQ208C is available at Aetrix Electronics and suitable for industrial motion control, legacy bus bridging, microprocessor peripheral interfacing, and digital signal processing accelerator applications requiring stable component supply across extended production lifecycles.

Supply support for XC4005-5PQ208C 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

Xilinx, founded in 1984, pioneered commercial FPGA technology and developed the XC4000 family as its third-generation high-density programmable logic platform.

The XC4000 family was designed to deliver reconfigurable logic density up to 25,000 gates with integrated RAM, fast carry, and robust software tooling - targeting embedded control, communications, and signal processing systems requiring hardware adaptability.

FAQ

What is the maximum guaranteed system clock frequency for XC4005-5PQ208C?

The XC4005-5PQ208C is rated for synchronous system clock operation up to 50 MHz under worst-case commercial temperature and voltage conditions. This is derived from its -5 speed grade, specifying 5 ns CLB propagation delay and validated through Xilinx's timing analysis tools using the XACT design suite. Real-world performance depends on routing congestion and logic depth, but the device consistently achieves 45–50 MHz in verified microprocessor interface and DSP accelerator implementations.

Does XC4005-5PQ208C support in-system programming via JTAG?

Yes, XC4005-5PQ208C includes full IEEE 1149.1-compliant boundary-scan logic, enabling in-system programming, debugging, and board-level test. The TCK/TMS/TDI/TDO pins allow configuration bitstream loading directly into SRAM cells without requiring external PROMs, and support readback of configuration data for verification. This capability is integral to field-upgradeable systems and production test automation.

How many bits of on-chip RAM does XC4005-5PQ208C provide, and how is it structured?

XC4005-5PQ208C provides 6,272 bits of user-accessible on-chip RAM, distributed across its 196 CLBs. Each CLB can configure its F' and G' look-up tables as either a 16×2-bit or 32×1-bit synchronous read/write memory array. Addressing uses F1–F4/G1–G4 as address lines; data I/O and write enable are routed through redefined CLB control pins (H1, DIN, S/R). This distributed RAM enables efficient FIFOs, status registers, and DMA buffers without external memory chips.

Can XC4005-5PQ208C replace multiple discrete logic devices in a design?

Yes, XC4005-5PQ208C routinely replaces 5–12 discrete logic devices including PALs, counters, multiplexers, and bus transceivers. Its 196 CLBs, 616 flip-flops, and 112 I/O pins support complex glue logic functions such as address decoding (up to 42 bits), wait-state generation, and bidirectional bus arbitration - all implemented in a single 28×28 mm PQFP package with no external timing constraints.

What configuration modes does XC4005-5PQ208C support?

XC4005-5PQ208C supports six configuration modes: Master Serial, Slave Serial, Master Parallel (8-bit), Slave Parallel (8-bit), Peripheral Asynchronous, and Peripheral Synchronous. Configuration data can be loaded from external PROMs (serial or byte-parallel), microprocessors (via data bus), or JTAG interface. All modes include CRC error checking, and startup can be synchronized to any user-defined clock signal - critical for deterministic system boot behavior.