AMD XC4008E-4PQ208C

Overview

XC4008E-4PQ208C from Xilinx is a Field-Programmable Gate Array (FPGA) with 8,000 usable gates, 208-pin Plastic Quad Flat Package (PQFP), -4 speed grade (15 ns CLB propagation delay), and commercial temperature range (0°C to 70°C). It implements synchronous digital logic in embedded control, protocol bridging, and data path acceleration.

For engineers reviewing the XC4008E-4PQ208C datasheet, pinout, applications, or equivalent options, key selection criteria include gate count, I/O count (168 user I/Os), speed grade timing, PQ208 package compatibility, and Spartan-E family configuration interface requirements.

Technical Context

The XC4008E-4PQ208C uses a configurable logic block (CLB) architecture with four-input lookup tables (LUTs), dedicated carry logic, and flip-flops with synchronous reset. It supports in-system configuration via JTAG boundary-scan (IEEE 1149.1) and serial PROM loading.

It integrates 168 user-programmable I/O pins with programmable slew rate and drive strength, and supports LVTTL and LVCMOS signaling standards. Configuration memory is SRAM-based and requires external initialization on power-up.

Key Specifications

Pinout & Package

XC4008E-4PQ208C is housed in a 208-pin Plastic Quad Flat Package (PQFP) with 0.5 mm lead pitch, 28 mm × 28 mm body size, and standard JEDEC MO-137AC footprint. Pin numbering follows counter-clockwise sequence starting from top-left corner (Pin 1 marked).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4008E-4PQ208C, the -3 variant improves worst-case path timing by 2.5 ns but increases power slightly; the XCS10-4PQ208C reduces I/O count and removes standard JTAG, trading flexibility for lower unit cost in volume production.

Availability

XC4008E-4PQ208C is available at Aetrix Electronics and suitable for industrial PLC expansion, medical data acquisition, and test equipment signal conditioning requiring stable component supply across multi-year production cycles.

Supply support for XC4008E-4PQ208C 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, now part of AMD, pioneered commercial FPGA technology and developed scalable programmable logic architectures for system-level integration.

The XC4000E family was designed for cost-effective, high-density logic replacement in embedded control, communications infrastructure, and instrumentation applications.

FAQ

What is the maximum operating frequency supported by XC4008E-4PQ208C?

The XC4008E-4PQ208C has a -4 speed grade specifying 15 ns CLB propagation delay, enabling reliable operation up to approximately 66 MHz for fully registered designs. Actual system frequency depends on routing, logic depth, and I/O timing constraints - verified timing analysis must be performed per design using Xilinx Foundation or Alliance software tools. XC4008E-4PQ208C does not guarantee fixed-frequency operation independent of placement and routing.

Does XC4008E-4PQ208C support in-system programming?

Yes, XC4008E-4PQ208C supports in-system programming via its IEEE 1149.1-compliant JTAG port (TCK/TMS/TDI/TDO pins), allowing configuration bitstream updates without removing the device from the PCB. It also supports Master Serial mode using an external PROM. XC4008E-4PQ208C requires external power and proper reset sequencing during reconfiguration.

What are the power supply requirements for XC4008E-4PQ208C?

XC4008E-4PQ208C requires two supply domains: V_CCINT = 5.0 V ± 5% for core logic and V_CCO = 5.0 V ± 5% for I/O banks. Total typical power consumption is 250 mW at 25 MHz toggle rate, scaling with activity factor. Decoupling capacitors (0.1 µF ceramic per power pin) are mandatory per Xilinx XC4000E design guidelines. XC4008E-4PQ208C does not support mixed-voltage I/O or core voltage scaling.

Can XC4008E-4PQ208C be used as a drop-in replacement for XC4008-4PQ208C?

No, XC4008E-4PQ208C is not a drop-in replacement for the earlier XC4008-4PQ208C. While pin-compatible, the XC4008E revision adds enhanced features including improved setup/hold margins, updated configuration logic, and extended JTAG support. Migration requires bitstream regeneration and timing revalidation. XC4008E-4PQ208C is backward-compatible in hardware layout but not in configuration file format.

Is XC4008E-4PQ208C still in active production?

XC4008E-4PQ208C is obsolete per Xilinx's PCN #0127-1024 (2003), but Aetrix Electronics maintains legacy inventory with full traceability and extended lifecycle support. Units are sourced from sealed original packaging with full lot traceability, conforming to RoHS-5 (lead exemption) and J-STD-020 moisture sensitivity level 3. XC4008E-4PQ208C remains available for repair, sustainment, and long-cycle industrial programs.