AMD XC3042-100PQ100C

Overview

XC3042-100PQ100C from Xilinx is a Field Programmable Gate Array (FPGA) with 144 configurable logic blocks (CLBs), 96 maximum flip-flops, and 480 longlines for global signal routing. It delivers guaranteed 100 MHz toggle rate, 5.5 ns combinatorial logic delay, and operates at 4.75–5.25 V in commercial temperature range (0°C to +85°C). It is used in legacy logic replacement and subsystem integration applications requiring reconfigurable digital logic.

For engineers reviewing the XC3042-100PQ100C datasheet, pinout, applications, or equivalent options, key selection considerations include CLB count, I/O count (up to 144 user-definable), power-down current (120 µA), timing grade (-100 speed), and PQFP-100 package compatibility with existing PCB layouts.

Technical Context

The XC3042-100PQ100C implements a static CMOS-based LCA (Logic Cell Array) architecture with 12×12 CLB array, each containing two function generators and flip-flop/latch capability. Its interconnect uses dedicated horizontal longlines and programmable interconnection points (PIPs) for low-skew global routing.

It supports both TTL- and CMOS-level input thresholds, features programmable output slew rate control and passive pull-up resistors on I/O pads, and includes dedicated global clock and reset distribution networks. The device is bitstream-compatible with the XC3100 family and upward-compatible with XC3000A devices.

Key Specifications

Pinout & Package

PQFP-100 (Plastic Quad Flat Package, 100 pins, 0.65 mm pitch, 20.0 × 20.0 mm body). Pinout conforms to Xilinx standard XC3000 PQFP-100 mechanical and functional layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3042-100PC84C, the XC3042-100PQ100C provides 28 additional I/Os and better thermal dissipation in PQFP form; compared with XC3042-100PQ100I, it trades extended temperature support for lower cost and qualification scope-both alternatives retain identical logic capacity, timing, and configuration compatibility.

Availability

XC3042-100PQ100C is available at Aetrix Electronics and suitable for industrial automation upgrades, legacy system refurbishment, and embedded controller subsystems requiring stable component supply over extended production lifecycles.

Supply support for XC3042-100PQ100C 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 established foundational architectures for reconfigurable logic design.

The XC3000 family was Xilinx's first production FPGA series, designed explicitly for replaceable TTL/CMOS logic and modular subsystem integration in industrial, telecom, and instrumentation systems.

FAQ

What is the maximum number of user I/O pins supported by XC3042-100PQ100C?

The XC3042-100PQ100C supports up to 144 user-definable I/O pins, consistent with its 12×12 CLB array and PQFP-100 package pinout allocation. All 100 package pins are assigned to VCC, GND, I/O, or dedicated functions (CLK, RESET, XTL), with I/O count constrained by physical pin count-not logic capacity. This matches the documented XC3042 specification in the Xilinx XC3000 data book.

Does XC3042-100PQ100C support in-system programming?

No, the XC3042-100PQ100C does not support in-system programming. It uses SRAM-based configuration memory loaded externally at power-up via a serial or parallel PROM. Configuration is volatile and must be reloaded after each power cycle. This behavior is inherent to the XC3000 architecture and confirmed in the "Configuration" section of the official Xilinx documentation.

What is the guaranteed minimum clock high time for XC3042-100PQ100C at –100 speed grade?

The guaranteed minimum clock high time for XC3042-100PQ100C is 4.0 ns under commercial operating conditions, as specified in the CLB Switching Characteristic Guidelines table (TCH, #11) for the –100 speed grade. This value applies to internal CLB clocks derived from IK/OK inputs and assumes worst-case voltage and temperature conditions within the 0°C to +85°C range.

Can XC3042-100PQ100C operate with a 3.3 V supply?

No, XC3042-100PQ100C requires a 5 V nominal supply (4.75–5.25 V for commercial grade). Its I/O buffers, CLB logic, and configuration circuitry are designed for 5 V CMOS/TTL compatibility. Operation below 4.75 V violates recommended operating conditions and risks functional failure or timing violation, as confirmed in the Absolute Maximum Ratings and Operating Conditions tables.

Is XC3042-100PQ100C pin-compatible with XC3042-100PQ100I?

Yes, XC3042-100PQ100C and XC3042-100PQ100I share identical PQFP-100 mechanical footprint, pin assignment, and electrical pin functions. The only difference is temperature grading: C-grade is rated for 0°C to +85°C junction, while I-grade extends to –40°C to +85°C. Both use the same VCC tolerance (4.75–5.25 V for C, 4.5–5.5 V for I), and all timing parameters are specified identically for the –100 speed grade.