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Home > Products > Integrated Circuits (ICs) > Memory > Configuration PROMs for FPGAs

AMD XC18V01SO20I

Name: XC18V01SO20I
Brand: AMD
SKU: XC18V01SO20I
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: XC18V01SO20I

Manufacturer:: AMD

Category:: Configuration PROMs for FPGAs

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: XC18V01SO20I.pdf

Description:: IC PROM SER I-TEMP 3.3V 20-SOIC

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Product details

Overview

XC18V01SO20I from Xilinx is a 1-Mbit in-system programmable 3.3V configuration PROM designed to store and serially/parallel load bitstreams into Xilinx FPGAs. It supports Master Serial, Slave Serial, Master-SelectMAP, and Slave-Parallel modes; offers 20,000 program/erase cycles; operates across –40°C to +85°C industrial temperature range; and features IEEE 1149.1 JTAG boundary-scan for in-system programming and verification.

For engineers reviewing the XC18V01SO20I datasheet, pinout, applications, or equivalent options, key selection criteria include its 1-Mbit capacity, SO20 package compatibility with Spartan-II/Virtex FPGA families, dual-mode (serial/parallel) configuration interface, JTAG-initiated FPGA reset via CF pin, and industrial-grade reliability for embedded reconfigurable systems.

Technical Context

The XC18V01SO20I implements a flash-based nonvolatile memory architecture with integrated JTAG TAP controller and configurable serial/parallel output interface. Its address counter advances on rising CLK edges when CE=Low and OE/RESET=High, enabling deterministic timing-critical FPGA configuration.

It supports cascading via CEO-to-CE daisy-chaining and provides 5V-tolerant I/O pins (D0–D7, CLK, CE, OE/RESET), allowing direct interfacing with mixed-voltage FPGA systems. The CF pin-routed to pin 7 in SO20 packages via CF→D4 option-enables JTAG-triggered FPGA PROGRAM pulse without external logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Capacity	1,048,576 bits (1-Mbit) - stores full configuration bitstream for XCV50, XCV100, XC2S50, and similar mid-range FPGAs.
Configuration Modes	Serial Slow/Fast (up to 33 MHz) and Parallel (up to 264 Mb/s at 33 MHz) - selectable via JTAG-accessible control register; serial is default.
Endurance	20,000 program/erase cycles - enables field firmware updates and iterative design validation in production systems.
Operating Temperature	–40°C to +85°C - qualified for industrial environments without derating or thermal management overhead.
I/O Voltage Tolerance	5V-tolerant inputs - accepts 5V, 3.3V, or 2.5V signals on D0–D7, CLK, CE, OE/RESET - simplifies level-shifting in legacy or mixed-voltage FPGA boards.
Output Drive	3.3V or 2.5V output capability - matches VCCO supply setting to align with FPGA I/O bank voltage requirements.
JTAG Compliance	Fully compliant with IEEE Std 1149.1 - supports boundary-scan testing, in-system programming, and CONFIG instruction for FPGA reset/initiation.

Pinout & Package

XC18V01SO20I is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package with gull-wing leads, RoHS-compliant, and rated for industrial temperature operation. Pin assignments are fixed per Xilinx DS026 v4.1 and validated for SO20 footprint.

Pin/Terminal	Circuit Role	Design Meaning
D0	Serial Data Output	Drives FPGA DIN pin in Master/Slave Serial mode; active only when CE=Low and OE/RESET=High.
D1–D7	Parallel Data Outputs	Active in Slave-Parallel/SelectMAP mode; high-impedance in serial mode; may be left unconnected if unused.
CLK	Configuration Clock Input	Driven by FPGA CCLK (Master modes) or external oscillator (Slave modes); increments address counter on rising edge.
OE/RESET	Output Enable / FPGA INIT Control	Bidirectional open-drain pin; pulled HIGH to release FPGA INIT; LOW resets address counter and forces DATA to Hi-Z.
CE	Chip Enable Input	High disables outputs and resets address counter; used for standby power reduction or cascading control.
CEO	Chip Enable Output	Drives CE of next PROM in daisy chain; goes LOW after terminal count reached, enabling next device automatically.
TCK/TMS/TDI/TDO	JTAG Test Access Port	4-wire IEEE 1149.1 interface for ISP programming, security configuration, IDCODE read, and CONFIG command execution.
CF (via D4)	JTAG-Triggered FPGA Reset	Functionally routed to pin 7 (D4) in SO20 packages; pulsed LOW for 300–500 ns by JTAG CONFIG instruction to assert FPGA PROGRAM.
VCCINT / VCCO / GND	Power Supplies	VCCINT = 3.3V core logic; VCCO = 3.3V or 2.5V I/O drivers; dual VCCO pins support robust decoupling in noise-sensitive configurations.

Key Features

Feature	Design Value
In-system programmability	Enables field reprogramming via standard JTAG cable without removing the device - eliminates socket wear and board rework.
Dual configuration interface	Single device supports both serial (1-bit) and parallel (8-bit) FPGA loading - reduces BOM count and increases design flexibility across FPGA generations.
Cascadable architecture	CEO output synchronizes multi-PROM chains for >1-Mbit configurations - supports large Virtex-II or Spartan-3 FPGAs without external glue logic.
JTAG CONFIG instruction	Hardware-level FPGA reset and configuration initiation via TAP - enables automated test, remote reconfiguration, and fail-safe recovery without host processor involvement.
Data security option	User-settable read-inhibit bit prevents JTAG-based bitstream extraction - protects intellectual property in deployed systems without requiring external encryption controllers.

Applications

Industrial PLC Configuration Storage	Aerospace FPGA Field Updates
Use Scenario: Storing and reloading FPGA configuration bitstreams in programmable logic controllers subjected to vibration, wide temperature swings, and infrequent firmware updates. IC Role / Device Role / Timing Role: Nonvolatile configuration memory providing deterministic, single-clock-cycle synchronized data delivery to Spartan-II FPGAs during cold start or hot reboot. Use Value: Eliminates external microcontroller dependency for bootloading; 20,000-cycle endurance ensures 10+ years of field update capability under industrial duty cycles.	Use Scenario: Enabling secure, in-flight reconfiguration of radiation-tolerant Virtex-E FPGAs in satellite subsystems using ground-commanded JTAG ISP. IC Role / Device Role / Timing Role: JTAG-controlled configuration PROM acting as trusted bitstream source with hardware-enforced read protection and verified erase-before-reprogram sequence. Use Value: Read security bit prevents unauthorized bitstream extraction; IEEE 1149.1 compliance guarantees interoperability with flight-certified ATE and telemetry interfaces.
Medical Imaging FPGA Boot Memory	Test Equipment Reconfigurable Logic
Use Scenario: Providing certified, repeatable FPGA initialization for real-time image processing pipelines in FDA-regulated ultrasound and MRI platforms. IC Role / Device Role / Timing Role: Master Serial mode PROM delivering bitstream to XCV100 FPGA with sub-microsecond access time and guaranteed power-on reset coordination via OE/RESET. Use Value: Industrial temperature rating and 20-year data retention meet IEC 62304 software lifecycle requirements; SO20 package supports compact, high-density PCB layouts.	Use Scenario: Supporting rapid FPGA reconfiguration between test vectors in automated semiconductor test handlers using JTAG-triggered CONFIG pulses. IC Role / Device Role / Timing Role: Boundary-scan-enabled PROM that initiates FPGA reload within 500 ns of JTAG CONFIG command - enabling <100 ms test mode switching. Use Value: Eliminates need for external reset circuitry; CEO chaining allows modular expansion to multi-FPGA test fixtures without redesigning clock/data routing.

Industrial PLC Configuration Storage

Aerospace FPGA Field Updates

Use Scenario: Storing and reloading FPGA configuration bitstreams in programmable logic controllers subjected to vibration, wide temperature swings, and infrequent firmware updates.

IC Role / Device Role / Timing Role: Nonvolatile configuration memory providing deterministic, single-clock-cycle synchronized data delivery to Spartan-II FPGAs during cold start or hot reboot.

Use Value: Eliminates external microcontroller dependency for bootloading; 20,000-cycle endurance ensures 10+ years of field update capability under industrial duty cycles.

Use Scenario: Enabling secure, in-flight reconfiguration of radiation-tolerant Virtex-E FPGAs in satellite subsystems using ground-commanded JTAG ISP.

IC Role / Device Role / Timing Role: JTAG-controlled configuration PROM acting as trusted bitstream source with hardware-enforced read protection and verified erase-before-reprogram sequence.

Use Value: Read security bit prevents unauthorized bitstream extraction; IEEE 1149.1 compliance guarantees interoperability with flight-certified ATE and telemetry interfaces.

Medical Imaging FPGA Boot Memory

Test Equipment Reconfigurable Logic

Use Scenario: Providing certified, repeatable FPGA initialization for real-time image processing pipelines in FDA-regulated ultrasound and MRI platforms.

IC Role / Device Role / Timing Role: Master Serial mode PROM delivering bitstream to XCV100 FPGA with sub-microsecond access time and guaranteed power-on reset coordination via OE/RESET.

Use Value: Industrial temperature rating and 20-year data retention meet IEC 62304 software lifecycle requirements; SO20 package supports compact, high-density PCB layouts.

Use Scenario: Supporting rapid FPGA reconfiguration between test vectors in automated semiconductor test handlers using JTAG-triggered CONFIG pulses.

IC Role / Device Role / Timing Role: Boundary-scan-enabled PROM that initiates FPGA reload within 500 ns of JTAG CONFIG command - enabling <100 ms test mode switching.

Use Value: Eliminates need for external reset circuitry; CEO chaining allows modular expansion to multi-FPGA test fixtures without redesigning clock/data routing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
XC18V02SO20I	2-Mbit capacity; identical SO20 package, pinout, and electrical specs - differs only in memory size and IDCODE (05025093h).	Suitable for larger FPGAs (e.g., XC2S100, XCV200) requiring >1-Mbit bitstreams; no change to PCB or interface logic needed.	Select when FPGA configuration exceeds 1-Mbit; retains same layout, timing, and software flow - ideal for scalable platform designs.
AT17LV010A-10JU	1-Mbit, 3.3V Atmel flash PROM in 20-pin SOIC; JTAG-compatible but lacks CONFIG instruction and CF functionality; no CEO pin.	Supports basic serial configuration only; requires external reset circuitry for FPGA PROGRAM assertion; not cascable beyond single device.	Choose for cost-sensitive, non-upgradable applications where JTAG-initiated reconfiguration and daisy-chaining are unnecessary.

Compared with XC18V02SO20I, XC18V01SO20I offers optimal fit for Spartan-II/XCV100-class FPGAs with minimal memory overhead and full feature parity; versus AT17LV010A-10JU, it delivers superior system integration via JTAG CONFIG, CEO chaining, and industrial reliability - critical for upgradable embedded systems.

Availability

XC18V01SO20I is available at Aetrix Electronics and suitable for industrial automation, aerospace avionics, medical imaging, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed obsolescence management.

Supply support for XC18V01SO20I 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 FPGA technology, specializing in high-performance adaptive computing solutions for aerospace, industrial, and communications markets.

The XC18V00 series was engineered specifically to provide reliable, in-system programmable configuration storage for Xilinx's Spartan and Virtex FPGA families - emphasizing JTAG integration, industrial temperature resilience, and seamless bitstream delivery.

FAQ

What is the memory capacity of the XC18V01SO20I?

The XC18V01SO20I provides 1,048,576 bits (1-Mbit) of nonvolatile flash memory, sufficient to store the full configuration bitstream for Xilinx FPGAs such as XCV50, XCV100, XC2S50, and XC2S100. This capacity is fixed and cannot be extended; devices requiring larger bitstreams must use XC18V02SO20I or cascaded PROMs.

How does the XC18V01SO20I interface with Xilinx FPGAs in Master Serial mode?

In Master Serial mode, the FPGA generates CCLK and drives the XC18V01SO20I's CLK pin; the PROM outputs serial data on D0, synchronized to each rising CCLK edge. CE and OE/RESET must be held Low and High respectively, and the FPGA's DIN pin connects directly to D0. Configuration begins automatically on power-up when M0=M1=M2=0.

Can the XC18V01SO20I be used in parallel configuration mode?

Yes - the XC18V01SO20I supports Slave-Parallel and Slave-SelectMAP modes, outputting 8-bit data on D0–D7 synchronized to CCLK. Mode selection is performed via JTAG using Xilinx iMPACT software; the default is serial mode. In SO20 packages, D1–D7 are functional only in parallel mode and remain high-impedance otherwise.

What is the function of the CF pin on the XC18V01SO20I?

The CF (Configuration Flag) pin on the XC18V01SO20I is a JTAG-controllable output that pulses LOW for 300–500 ns when the CONFIG instruction is issued. In SO20 packages, CF is routed to pin 7 (D4) via factory-programmed option. It must connect to the FPGA's PROGRAM pin to trigger hardware reset and configuration reload without external circuitry.

Does the XC18V01SO20I support cascading with other PROMs?

Yes - the XC18V01SO20I includes a CEO (Chip Enable Output) pin that asserts LOW after its internal address counter reaches terminal count. This signal drives the CE input of the next XC18V00-series PROM in a daisy chain, enabling automatic handoff for multi-device bitstream storage - essential for configuring large FPGAs like XC2V1000 or XC3S1500.

XC18V01SO20I Specifications

Product attributes: Attribute value

Manufacturer:: AMD

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Programmable Type:: In System Programmable

Memory Size:: 1Mb

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

XC18V01SO20I FAQ

1.How can I place an order for XC18V01SO20I through Aetrix?

Please submit a Request for Quotation (RFQ) for XC18V01SO20I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for XC18V01SO20I reliable?

The price and inventory of XC18V01SO20I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for XC18V01SO20I is usually 5 days.

3.What payment methods are accepted for XC18V01SO20I?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for XC18V01SO20I transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for XC18V01SO20I?

XC18V01SO20I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your XC18V01SO20I order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for XC18V01SO20I?

For technical support, including XC18V01SO20I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your XC18V01SO20I requirements.

6.How does Aetrix verify that XC18V01SO20I is sourced from the original manufacturer or authorized distributors?

All XC18V01SO20I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that XC18V01SO20I meets industry standards.

7.What is the process for return or replacement of XC18V01SO20I?

All XC18V01SO20I units undergo pre-shipment inspection (PSI). If there is an issue with XC18V01SO20I, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The XC18V01SO20I part is unused and in its original packaging.

Return procedure for XC18V01SO20I:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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