AMD XC3195-5PC84I

Overview

XC3195-5PC84I 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 for embedded digital subsystem integration.

For engineers reviewing the XC3195-5PC84I 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 support for serial configuration via XC17XX PROMs.

Technical Context

The XC3195-5PC84I 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 4-input LUTs, two edge-triggered D flip-flops with shared asynchronous reset (RD) and enable clock (EC), and programmable inversion on clock (K) and output signals.

Configuration is stored in distributed static memory cells-each cell uses dual-CMOS inverters with pass-transistor write/read control-ensuring immunity to alpha radiation and power-supply excursions. Configuration data is loaded serially or in byte-parallel mode, with automatic bitstream error checking and soft-start output activation to suppress ground bounce during initial power-up.

Key Specifications

Pinout & Package

XC3195-5PC84I is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead geometry, 0.05-inch pitch, and 1.27 mm lead spacing. The package supports surface-mount assembly and provides thermal and mechanical stability for industrial temperature operation (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3195-5PC84I, the XC3195A-5PQ208I adds 48 I/Os and thermal headroom in a larger PLCC-compatible footprint, while the XC3195A-5BG256I replaces J-leads with solder-ball interconnect to reduce parasitic inductance-critical for maintaining setup/hold margins in high-speed parallel buses.

Availability

XC3195-5PC84I is available at Aetrix Electronics and suitable for industrial motion control, medical imaging subsystems, aerospace interface modules, and legacy system emulation requiring stable component supply across extended product lifecycles.

Supply support for XC3195-5PC84I 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 Series-including XC3195-5PC84I-was designed for high-reliability, medium-complexity digital systems requiring field-upgradable logic, deterministic timing, and seamless integration with legacy TTL/CMOS circuitry.

FAQ

What is the maximum system clock frequency supported by XC3195-5PC84I?

The XC3195-5PC84I supports system clock speeds over 85 MHz, with guaranteed flip-flop toggle rates up to 370 MHz. Its 1.5 ns logic delay enables robust timing closure in synchronous designs operating at 80–85 MHz, provided PCB layout adheres to controlled-impedance routing and proper power integrity practices for the 3.3 V supply domain.

Does XC3195-5PC84I require an external configuration PROM?

Yes, XC3195-5PC84I requires an external configuration memory device such as the XC17XX series serial PROM to retain its logic configuration after power cycling. The FPGA itself contains volatile static RAM configuration memory; it loads the bitstream automatically at power-up only when paired with a compatible PROM connected to its CCLK/DIN/PROGRAM pins.

Is XC3195-5PC84I pin-compatible with other XC3000-series devices?

XC3195-5PC84I is architecture- and pin-out compatible with the XC3000A, XC3000L, XC3100A, and XC3100L families, but not with earlier XC3000 devices. Its 84-pin PLCC footprint matches other XC3195 variants (e.g., XC3195A-5PC84I), and all share identical I/O placement, power pin locations, and configuration interface signals.

What I/O voltage standards does XC3195-5PC84I support?

XC3195-5PC84I operates at a nominal 3.3 V supply and supports both TTL and CMOS input thresholds per IOB-configurable individually via bitstream settings. Output drive is CMOS-compatible with 8 mA sink/source capability, enabling direct interfacing to 3.3 V LVTTL, LVCMOS, and 5 V TTL loads with appropriate termination.

How does the Soft Startup feature function in XC3195-5PC84I?

The Soft Startup feature in XC3195-5PC84I automatically limits the slew rate of all outputs during the first activation after configuration completes, preventing simultaneous switching noise and ground bounce. After startup, individual I/O slew rates revert to values set by configuration bits-allowing fast transitions on critical paths and slower edges on non-critical nets to reduce EMI.