AMD XC4008E-3PQ208I

Overview

XC4008E-3PQ208I from Xilinx is a Field-Programmable Gate Array (FPGA) with 8,000 usable gates, 208-pin Plastic Quad Flat Package (PQFP), -3 speed grade (12.5 ns CLB propagation delay), and industrial temperature range (-40°C to +100°C). It implements synchronous digital logic in embedded control and interface bridging applications.

For engineers reviewing the XC4008E-3PQ208I datasheet, pinout, applications, or equivalent options, key selection criteria include gate count, I/O count (168 user I/Os), speed grade timing, PQFP thermal profile, and legacy 5V CMOS compatibility.

Technical Context

The XC4008E-3PQ208I belongs to Xilinx's XC4000E FPGA family, built on 0.5 µm CMOS technology. It contains configurable logic blocks (CLBs), input/output blocks (IOBs), and interconnect resources programmable via SRAM configuration memory. Configuration is performed serially through the JTAG boundary-scan port or parallel mode using external PROM.

It supports 5V TTL/CMOS signaling levels and includes dedicated carry logic for high-speed arithmetic. The device lacks internal clock management circuitry such as DLLs or PLLs and relies on external clock sources for synchronous operation.

Key Specifications

Pinout & Package

XC4008E-3PQ208I uses a 208-pin PQFP (Plastic Quad Flat Package) with 0.5 mm lead pitch, 28 × 28 mm body size, and exposed pad not present. Pin assignments follow Xilinx's standard XC4000E IOB layout, supporting LVTTL and TTL-compatible signaling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4008E-3PQ208I, the -4 speed grade improves maximum operating frequency by ~25% with no layout change, while the XC4010E-3PQ208I provides headroom for logic expansion without altering PCB footprint or I/O assignment.

Availability

XC4008E-3PQ208I is available at Aetrix Electronics and suitable for industrial motion control, legacy bus interface bridging, and automated test equipment requiring stable component supply over extended production lifecycles.

Supply support for XC4008E-3PQ208I 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 the XC4000 family as its first widely adopted SRAM-based programmable logic platform.

The XC4000E product line was engineered for cost-sensitive, high-reliability industrial and aerospace applications requiring field-upgradable logic with 5V system compatibility and deterministic timing.

FAQ

What is the maximum system clock frequency supported by XC4008E-3PQ208I?

The XC4008E-3PQ208I has a -3 speed grade specifying 12.5 ns CLB propagation delay. In typical synchronous designs with register-to-register paths, this supports a maximum system clock frequency of approximately 40 MHz under worst-case industrial temperature and voltage conditions. Actual achievable frequency depends on routing congestion, logic depth, and I/O timing constraints.

Does XC4008E-3PQ208I support in-system programming via JTAG?

Yes, XC4008E-3PQ208I supports IEEE 1149.1 JTAG boundary-scan for configuration loading, verification, and debugging. The TDI, TDO, TMS, and TCK pins enable serial bitstream download into the internal SRAM configuration memory without requiring external PROM or power-cycle reset.

Is XC4008E-3PQ208I compatible with 3.3V I/O interfaces?

No, XC4008E-3PQ208I is a 5V-only device. Its I/O buffers are designed for 5V TTL/CMOS signaling levels and are not 3.3V-tolerant. Direct connection to 3.3V logic requires external level-shifting circuitry to prevent damage and ensure signal integrity.

What configuration modes does XC4008E-3PQ208I support?

XC4008E-3PQ208I supports Master Serial (via external PROM), Slave Serial (via microcontroller), and JTAG modes. It does not support Master SelectMAP or Slave Parallel modes. Configuration data is loaded into volatile SRAM, requiring reload after each power cycle.

Can XC4008E-3PQ208I be used in automotive applications?

XC4008E-3PQ208I is rated for industrial temperature (-40°C to +100°C) but is not AEC-Q100 qualified. It may be used in under-hood or infotainment applications only after full system-level qualification, including thermal cycling, ESD, and EMC testing per ISO 16750 and ISO 11452 standards.