AMD XC4020XL-1PQ208C

Overview

XC4020XL-1PQ208C from Xilinx is a Field-Programmable Gate Array (FPGA) with 20,000 usable gates, 208-pin Plastic Quad Flat Package (PQFP), -1 speed grade (10 ns CLB propagation delay), and built-in boundary-scan test logic compliant with IEEE Std 1149.1. It targets mid-complexity digital logic replacement in industrial control and communications interface designs.

For engineers reviewing the XC4020XL-1PQ208C datasheet, pinout, applications, or equivalent options, key selection criteria include gate count, I/O count (176 user I/Os), speed grade (-1), configuration mode (master serial via PROM), and JTAG compliance for in-system programming and test.

Technical Context

The XC4020XL-1PQ208C implements a configurable logic block (CLB) architecture with four-input look-up tables (LUTs), dedicated carry logic for arithmetic, and distributed RAM capability per CLB. It supports multiple configuration modes including master serial, slave serial, and boundary-scan.

It features programmable input/output blocks (IOBs) with selectable slew rate, pull-up resistors, and three-state control. Configuration is performed via internal SRAM cells loaded from external PROM or processor-controlled serial interface, with full IEEE 1149.1 JTAG support for debugging and testing.

Key Specifications

Pinout & Package

XC4020XL-1PQ208C is housed in a 208-pin Plastic Quad Flat Package (PQFP) with 0.5 mm lead pitch and 28 mm × 28 mm body size. The package supports fine-pitch SMT assembly and thermal dissipation suitable for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4020XL-1PQ208C, XC4013XL-1PQ208C offers cost reduction at gate-count expense, while XCV300E-4PQ240C provides scalable density and memory resources but requires PCB redesign due to larger package and different pinout.

Availability

XC4020XL-1PQ208C is available at Aetrix Electronics and suitable for industrial control, telecom infrastructure, medical imaging subsystems, and automated test equipment requiring stable component supply and long-term obsolescence management.

Supply support for XC4020XL-1PQ208C 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 the industry's first widely adopted SRAM-based programmable logic platform.

The XC4000XL product line was designed specifically for cost-sensitive, low-power industrial and communications applications requiring reliable reconfigurable logic with JTAG testability and 3.3 V operation.

FAQ

What is the configuration voltage requirement for XC4020XL-1PQ208C?

The XC4020XL-1PQ208C operates from a single 3.3 V ±10% supply for both core logic and I/O banks. It does not support 5 V-tolerant inputs or dual-supply operation. Configuration PROM must be 3.3 V compatible, and the HSWAP_EN pin controls weak pull-ups during power-up to prevent bus contention before configuration completes. This 3.3 V requirement directly enables lower power consumption versus earlier 5 V FPGA families.

Does XC4020XL-1PQ208C support in-system programming (ISP)?

Yes, XC4020XL-1PQ208C supports in-system programming via its IEEE 1149.1 JTAG interface (TMS, TDI, TDO, TCK pins). This allows configuration bitstream loading, boundary-scan testing, and device debugging without removing the device from the board. ISP eliminates the need for dedicated programming fixtures and enables field firmware updates - a key advantage for deployed XC4020XL-1PQ208C systems in telecom and industrial environments.

How many global clock inputs does XC4020XL-1PQ208C provide?

XC4020XL-1PQ208C provides four dedicated global clock inputs: GCK1, GCK2, GCK3, and GCK4. Each connects to a separate low-skew global routing network distributing clock signals to all CLBs and IOBs. This architecture supports multi-clock domain designs such as those requiring independent timing for data capture, processing, and output stages - critical in XC4020XL-1PQ208C implementations like telecom line card controllers.

What is the maximum number of user I/O pins on XC4020XL-1PQ208C?

XC4020XL-1PQ208C provides 176 user-programmable I/O pins in its 208-pin PQFP package. All I/Os support programmable drive strength, slew rate control, and optional weak pull-up resistors. This I/O count enables direct connection to parallel buses, multiple peripheral interfaces, or high-channel-count sensor arrays - making XC4020XL-1PQ208C suitable for applications such as industrial PLC backplane logic replacement.

Is XC4020XL-1PQ208C still in active production?

No, XC4020XL-1PQ208C is obsolete and no longer in active production by AMD (formerly Xilinx). However, Aetrix Electronics maintains verified, traceable inventory of original manufacturer stock with full lot traceability and extended lifecycle support. Customers using XC4020XL-1PQ208C in legacy industrial and telecom systems can rely on Aetrix for long-term supply continuity and obsolescence mitigation planning.