AMD XC18V04PC44I

Overview

XC18V04PC44I from Xilinx is a 4-Mbit in-system programmable configuration PROM designed to store and serially/parallel load bitstreams into Xilinx FPGAs. It operates at 3.3V or 2.5V I/O, supports JTAG-based ISP with 20,000 program/erase cycles, and functions across –40°C to +85°C industrial temperature range. It enables Master Serial, Slave Serial, Master-SelectMAP, and Slave-Parallel FPGA configuration modes.

For engineers reviewing the XC18V04PC44I datasheet, pinout, applications, or equivalent options, key selection criteria include its 4-Mbit capacity, PC44 (PLCC-44) package compatibility, dual-mode interface (serial up to 33 MHz / parallel up to 264 Mb/s), IEEE 1149.1 JTAG compliance, and FPGA configuration reset via CF pin pulse.

Technical Context

The XC18V04PC44I implements a flash-based nonvolatile memory architecture with integrated JTAG TAP controller for boundary-scan testing and in-system programming. Its internal address counter advances on each rising CLK edge when CE is low and OE/RESET is high, enabling synchronous data output aligned to FPGA CCLK.

Configuration mode selection (serial vs. parallel) is controlled via a user-accessible register programmed through JTAG; serial mode is default. The device supports cascading via CEO-to-CE daisy-chaining and provides 5V-tolerant I/O pins for mixed-voltage system interfacing with Xilinx Virtex, Spartan, and Virtex-II families.

Key Specifications

Pinout & Package

XC18V04PC44I is packaged in a 44-pin PLCC (Plastic Leaded Chip Carrier), designated as PC44 per Xilinx documentation. This surface-mount package features gull-wing leads, 0.05-inch lead pitch, and a 16.59 mm × 16.59 mm body size with 3.56 mm height - compatible with standard PLCC sockets and reflow assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar configuration PROM applications.

Compared with XC18V04PC44C and XC18V04VQ44I, the XC18V04PC44I uniquely combines industrial temperature qualification with PLCC-44's socket-compatible, serviceable form factor - making it optimal for field-deployable reconfigurable systems requiring repairability and thermal robustness.

Availability

XC18V04PC44I is available at Aetrix Electronics and suitable for industrial FPGA configuration, reconfigurable test equipment, aerospace avionics boot memory, and multi-FPGA communication gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for XC18V04PC44I 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, is a pioneer in programmable logic and adaptive computing solutions, delivering FPGA, SoC, and ACAP platforms for high-performance, low-latency applications.

The XC18V00 series was engineered specifically to provide reliable, in-system programmable configuration memory for Xilinx FPGA families - emphasizing JTAG accessibility, industrial reliability, and seamless integration with Alliance/Foundation design tools.

FAQ

What is the memory capacity of the XC18V04PC44I and which Xilinx FPGAs does it support?

The XC18V04PC44I provides 4,194,304 bits (4 Mbit) of configuration memory. It natively supports XCV400, XC2V1000, XC2V1500, XC3S1000, and XCV800 FPGAs in single-device configuration. For larger devices like XC2VP70 or XC3S4000, multiple XC18V04PC44I units can be cascaded using CEO-to-CE chaining - confirmed in Xilinx DS026 Table 2.

Does the XC18V04PC44I support both serial and parallel configuration modes?

Yes, the XC18V04PC44I supports dual configuration modes: serial (1-bit D0 output, up to 33 MHz) and parallel (8-bit D0–D7 output, up to 264 Mb/s). Mode selection is performed via a user-accessible control register programmed through JTAG using Xilinx iMPACT software - serial mode is factory-default.

How does the CF pin function on the XC18V04PC44I, and what is its role in FPGA configuration?

The CF (Configuration) pin on the XC18V04PC44I is an open-drain output pulsed Low for 300–500 ns upon execution of the JTAG CONFIG instruction. When connected to the FPGA's PROGRAM pin, this pulse resets the FPGA and initiates configuration - enabling JTAG-triggered reconfiguration without power cycling. This feature is documented in DS026 Section "Initiating FPGA Configuration".

What is the operating temperature range and endurance rating of the XC18V04PC44I?

The XC18V04PC44I is rated for industrial operation from –40°C to +85°C and guarantees 20,000 program/erase cycles with ≥20 years of data retention - specified in DS026 Features section and Reliability section. These values are measured and warranted across the full temperature and voltage range, not typical or nominal conditions.

Is the XC18V04PC44I pin-compatible with other members of the XC18V00 family?

Yes, all XC18V00-series PROMs - including XC18V01, XC18V02, XC18V04, and XC18V512 - share identical pinouts across the same package type (e.g., PC44). This allows direct substitution based on capacity needs without PCB redesign, as confirmed in DS026 Pinout and Pin Description section and Table 1.