AMD XC4005-5PC84C

Overview

XC4005-5PC84C from Xilinx is a third-generation Field-Programmable Gate Array (FPGA) with 5,000 usable gates, 196 Configurable Logic Blocks (CLBs), 616 flip-flops, and 112 user I/O pins in an 84-pin plastic leaded chip carrier (PLCC) package. It supports system clock rates up to 50 MHz and implements wide-input logic functions (up to 9 inputs per CLB), fast carry arithmetic, and on-chip RAM for distributed memory applications in digital signal processing and microprocessor interface systems.

For engineers reviewing the XC4005-5PC84C datasheet, pinout, applications, or equivalent options, key selection criteria include its -5 speed grade (5 ns CLB propagation delay), PLCC-84 mechanical compatibility, IEEE 1149.1 boundary-scan support, 12 mA output sink capability, and configurable I/O slew rate - all critical for embedded control, protocol bridging, and reconfigurable data-path designs.

Technical Context

The XC4005-5PC84C implements a symmetric CLB architecture with two independent 4-input function generators (F' and G') plus a third 3-input H' generator combining F', G', and an external input - enabling single-block implementation of 5–9 variable logic functions. Each CLB contains two edge-triggered D flip-flops with programmable asynchronous set/reset, shared clock (K), and clock enable (EC).

Routing resources include eight global low-skew nets for clocks or control signals, double-length and longline interconnects for high-speed bus routing, and four edge-mounted wide decoders (up to 42 inputs each) for fast address decoding. I/O blocks support programmable input setup time, output slew-rate control, and 12 mA per-output sink current with wire-AND pairing capability.

Key Specifications

Pinout & Package

XC4005-5PC84C is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, 0.050" lead pitch, and 1.27 mm lead spacing. The package is surface-mount compatible and features a ceramic base with molded plastic body, rated for industrial temperature range (0°C to 70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4005-5PC84C, the -6 variant trades 10% speed margin for lower power and cost, while the XC4005A-5PC84C removes on-chip RAM and routing flexibility - making the original XC4005-5PC84C the only option supporting both high-speed arithmetic and distributed memory in PLCC-84 form factor.

Availability

XC4005-5PC84C is available at Aetrix Electronics and suitable for industrial protocol bridging, reconfigurable test instrumentation, and microprocessor bus interface applications requiring stable component supply across extended product lifecycles.

Supply support for XC4005-5PC84C 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 product line was designed to deliver scalable, reprogrammable logic density (2k–25k gates) with integrated RAM, fast carry, and boundary-scan - targeting embedded control, communications, and DSP acceleration where ASIC development cost and time were prohibitive.

FAQ

What is the maximum guaranteed system clock frequency for XC4005-5PC84C?

The XC4005-5PC84C is rated for synchronous system clock rates up to 50 MHz under industrial temperature conditions. This performance derives from its -5 speed grade, which specifies 5 ns CLB propagation delay and supports critical paths with ≤20 ns total routing + logic delay. Actual achievable clock frequency depends on design topology, placement density, and I/O timing constraints - verified via Xilinx XACT place-and-route timing analysis. XC4005-5PC84C maintains this rating across its full 0°C to 70°C operating range when powered at 5.0 V ±5%.

Does XC4005-5PC84C support in-system programming (ISP)?

XC4005-5PC84C supports configuration reload via its PROGRAM and INIT pins but does not implement true in-system programming as defined for flash-based devices. Configuration is loaded from external serial or parallel PROM during power-up or upon command, and the device retains no non-volatile configuration memory. Reprogramming requires external configuration source and valid CCLK/DIN signals - enabling field updates but not autonomous self-reconfiguration. XC4005-5PC84C relies on external memory for bitstream storage, and its SRAM-based configuration is volatile across power cycles.

Can XC4005-5PC84C implement synchronous FIFOs using on-chip resources?

Yes, XC4005-5PC84C can implement synchronous FIFOs using CLB-based RAM: each CLB supports 16×2 or 32×1 read/write memory arrays, and the device contains 196 CLBs yielding up to 6,272 bits of distributed RAM. A 16-byte (128-bit) FIFO requires four CLBs for storage plus six for address counters and control logic, as documented in Xilinx Application Note XAPP026. XC4005-5PC84C provides dedicated carry logic and pipelined flip-flops to meet full-speed read/write timing - achieving zero-cycle write-to-read turnaround in properly constrained designs.

What JTAG capabilities does XC4005-5PC84C provide?

XC4005-5PC84C implements full IEEE 1149.1 boundary-scan logic with TDI, TDO, TMS, TCK, and optional TRST pins. It supports EXTEST, SAMPLE/PRELOAD, and BYPASS instructions for board-level interconnect testing, and enables readback of configuration bitstream and flip-flop states. JTAG access requires compliance with Xilinx's TAP controller specification and is supported by XACT software for programming and debugging. XC4005-5PC84C does not support INTEST for internal logic testing - boundary-scan is limited to I/O pin visibility and configuration verification.

Is XC4005-5PC84C pin-compatible with other XC4000-series PLCC-84 devices?

XC4005-5PC84C is pin-compatible with all XC4000-family devices in the PLCC-84 package, including XC4004A-5PC84C, XC4005H-5PC84C, and XC4006-5PC84C. Power (VCC/GND), configuration (CCLK/DIN/PROGRAM/INIT), and JTAG pins occupy identical locations. I/O pin assignments are consistent across the family, though functional availability (e.g., dedicated decoders or RAM) varies by density grade. XC4005-5PC84C may be substituted for lower-density variants without PCB modification, but higher-density variants require design validation due to increased internal routing resource demands.