AMD XC3195-3PC84C

Overview

XC3195-3PC84C from Xilinx is a high-density, static-memory-based Field Programmable Gate Array (FPGA) with 7,500 usable logic gates, 484 Configurable Logic Blocks (22 × 22 array), and 176 user I/Os in an 84-pin plastic leaded chip carrier (PLCC) package. It supports system clock speeds over 85 MHz, features TTL/CMOS input thresholds, on-chip crystal oscillator amplifier, and internal 3-state bus capability - deployed in legacy telecom line-card control and industrial programmable logic replacement.

For engineers reviewing the XC3195-3PC84C datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 370 MHz flip-flop toggle rate, 1.5 ns logic delay, soft-start slew-rate limiting at power-up, architecture compatibility with XC3000A/XC3100A families, and PLCC-84 packaging for through-hole prototyping and legacy board repair.

Technical Context

The XC3195-3PC84C implements a regular, extendable FPGA architecture comprising a perimeter of programmable Input/Output Blocks (IOBs), a core array of 484 Configurable Logic Blocks (CLBs), and hierarchical interconnect resources including general-purpose metal grids, direct CLB-to-CLB paths, and horizontal longlines. Each CLB contains dual flip-flops, five logic inputs (A–E), programmable clock inversion, and a 32×1 look-up table supporting two independent 4-variable functions or one 5-variable function.

Configuration is stored in distributed static memory cells loaded via serial or parallel mode; bitstream is compatible with XC3000A, XC3000L, and XC3100L families. IOBs support registered/direct I/O, programmable slew rate, TTL/CMOS threshold selection, passive pull-up, and soft startup - where all outputs are slew-rate limited during initial power-up to suppress ground bounce.

Key Specifications

Pinout & Package

XC3195-3PC84C uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, designed for socketed or soldered through-hole mounting. Pin numbering follows standard PLCC convention (Pin 1 marked by notch or dot, counterclockwise).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3195-3PC84C, the XC3195A-3PC84C offers identical functionality at lower qualification cost but lacks industrial temperature support, while XC3195-4PC84C trades 200 MHz toggle headroom for reduced dynamic power - both require no PCB changes but differ in thermal and timing validation scope.

Availability

XC3195-3PC84C is available at Aetrix Electronics and suitable for telecom infrastructure upgrades, industrial control retrofits, avionics I/O expansion, and legacy test equipment maintenance requiring stable component supply and long-term obsolescence mitigation.

Supply support for XC3195-3PC84C 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, Inc. pioneered commercial FPGA technology and established foundational architectures for reconfigurable logic design before its acquisition by AMD in 2022.

The XC3000 Series - including XC3195-3PC84C - was engineered for high-reliability, pin-compatible migration from TTL/MSI logic and early gate arrays in telecom, military, and industrial control systems.

FAQ

What is the operating temperature range for XC3195-3PC84C?

The XC3195-3PC84C is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in Xilinx's November 1998 XC3000 Series documentation (Version 3.1), distinguishing it from the commercial-grade XC3195A-3PC84C variant. Thermal derating is not required within this range, and the device maintains guaranteed 1.5 ns logic delay and 370 MHz toggle performance across the full span.

Is XC3195-3PC84C pin-compatible with other XC3000-series FPGAs?

Yes, XC3195-3PC84C is 100% pin-out compatible with all XC3000A, XC3000L, XC3100A, and XC3100L family members in the same PLCC-84 package. This includes identical I/O pin assignments, power/ground locations, and configuration control pin positions (PROGRAM, INIT, RESET). No PCB modification is needed when migrating between these variants.

Does XC3195-3PC84C support in-system reconfiguration?

XC3195-3PC84C supports in-system logic changes via serial or parallel configuration reload, enabled by its static memory-based architecture. The device accepts new bitstreams while powered, allowing field-upgradable logic functions - though full reconfiguration requires asserting PROGRAM and waiting for INIT deassertion. Soft startup activates on each reload to limit output slew.

What configuration memory technology does XC3195-3PC84C use?

XC3195-3PC84C uses distributed CMOS static memory cells for configuration storage - each cell consists of two cross-coupled inverters and a pass transistor. Unlike volatile SRAM-based FPGAs, this design provides inherent radiation hardness and immunity to alpha-particle-induced soft errors, with no observed configuration corruption even under high-dose testing.

Can XC3195-3PC84C drive TTL loads directly?

Yes, XC3195-3PC84C IOBs provide 8 mA sink and 8 mA source current per output, meeting standard TTL fan-out requirements (TTL: 16 LS-TTL loads). Its configurable TTL/CMOS input thresholds and 5 V supply ensure native interoperability with legacy TTL logic without level-shifting circuitry.