Microchip Technology AT17LV512A-10JI

Overview

AT17LV512A-10JI from Microchip Technology (formerly Atmel) is a 512-kbit FPGA configuration EEPROM designed to store and serially load bitstream data into SRAM-based FPGAs including Altera FLEX® and APEX™, Xilinx Spartan® and Virtex®, and Lucent ORCA® devices. It operates at 3.3V ±10% or 5.0V ±10% (industrial), supports in-system programming via 2-wire bus, features programmable reset polarity, and delivers 90-year data retention at 85°C. Its primary role is master-serial configuration memory in industrial embedded FPGA systems.

For engineers reviewing the AT17LV512A-10JI datasheet, AT17LV512A-10JI pinout, AT17LV512A-10JI application, or AT17LV512A-10JI equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), cascading capability via nCASC/nCS daisy-chain, standby current ≤100 µA at 3.3V, WP1 write-protect pin availability, and compatibility with Altera EPC1441 replacement requirements.

Technical Context

The AT17LV512A-10JI implements a serial EEPROM architecture optimized for FPGA configuration loading, using a synchronous master-serial interface where DCLK increments an internal address counter and DATA outputs configuration bits on rising edges. It supports both standalone and cascaded operation: nCASC asserts low upon end-of-memory to enable the next device's nCS, enabling seamless multi-device bitstream chaining without external logic.

Its control logic integrates RESET/OE dual-function (active-low reset / active-high output enable), SER_EN-gated 2-wire ISP mode, and programmable reset polarity stored in EEPROM. The device includes internal oscillator control, tri-state DATA management, and hardware write protection via WP1 - a dedicated input available only on AT17LV512A/010A/002A variants - ensuring secure partial memory lock during field updates.

Key Specifications

Pinout & Package

AT17LV512A-10JI is packaged in a 20-lead Plastic Leaded Chip Carrier (PLCC), compliant with JEDEC MS-018 Variation AA. Dimensions: 10.033 mm × 10.033 mm body, 3.048 mm max height, 1.27 mm lead pitch. Thermal resistance: θJA = 90°C/W, θJC = 35°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT17LV512-10JI and Intel EPC1441, the AT17LV512A-10JI uniquely combines WP1 hardware write protection, industrial-grade 90-year data retention, and native nCASC-based daisy-chaining - making it optimal for safety-critical, long-lifecycle, and multi-FPGA industrial systems.

Availability

AT17LV512A-10JI is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based motor drives, telecom line cards, and avionics subsystems requiring stable component supply across extended product lifecycles and temperature ranges.

Supply support for AT17LV512A-10JI 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

Microchip Technology acquired Atmel in 2016 and maintains full support for the AT17LV family. The company specializes in microcontrollers, analog, FPGA configuration, and secure authentication ICs for industrial, automotive, and aerospace markets.

The AT17LV series was originally developed by Atmel to address the need for reliable, easy-to-integrate, and vendor-agnostic FPGA configuration memory - targeting designers working with Altera, Xilinx, Lucent, and Motorola FPGAs in demanding environments.

FAQ

What is the primary function of the AT17LV512A-10JI in an FPGA-based system?

The AT17LV512A-10JI serves as a dedicated serial configuration EEPROM that stores and loads bitstream data into SRAM-based FPGAs during power-up or reset. It operates in master-serial mode, interfacing directly with FPGA control pins (DIN, DCLK, nCONFIG) to automate configuration without external processors. Its design ensures deterministic, repeatable FPGA initialization in industrial systems where reliability and timing predictability are critical - a core function fulfilled by the AT17LV512A-10JI across all supported FPGA families.

Does the AT17LV512A-10JI support in-system programming, and how is it implemented?

Yes, the AT17LV512A-10JI supports in-system programming (ISP) via a 2-wire serial interface activated when SER_EN is pulled low. During ISP, the device accepts programming commands and data through the DATA and DCLK pins under control of an external programmer or microcontroller. This capability enables field updates of FPGA configuration bitstreams without removing the AT17LV512A-10JI from the PCB - a feature confirmed in the official datasheet and validated in Atmel's ATDH2225 ISP Cable application notes.

What is the purpose of the WP1 pin on the AT17LV512A-10JI, and which variants include it?

The WP1 (Write Protect 1) pin on the AT17LV512A-10JI provides hardware-level protection for memory blocks during programming operations. It is explicitly documented as available only on AT17LV512A/010A/002A devices - not on smaller-density variants like AT17LV256A. When asserted, WP1 disables writes to the lowest memory block, safeguarding bootloader or security-critical configuration data. This pin is inactive during normal FPGA configuration loading and is used exclusively in ISP mode - a verified feature unique to the AT17LV512A-10JI among its density class.

How does the AT17LV512A-10JI handle cascading for larger FPGA configurations?

The AT17LV512A-10JI supports cascading via its dedicated nCASC (cascade select) output and nCS (chip select) input. When the internal address counter reaches maximum value, nCASC goes low, enabling the nCS of the next AT17LV device in the chain. This daisy-chain mechanism allows sequential loading of configuration data across multiple devices without external logic or timing intervention. The AT17LV512A-10JI's nCASC functionality is electrically and functionally identical to other AT17LV512A/010A/002A variants - a confirmed capability per the "Cascading Serial Configuration EEPROMs" section of the datasheet.

What are the key reliability specifications of the AT17LV512A-10JI for industrial use?

The AT17LV512A-10JI is rated for industrial operation (−40°C to +85°C) with 100,000 write/erase cycles and 90 years of data retention at 85°C - values explicitly specified in the DC Characteristics table for industrial-grade parts. These metrics are measured and guaranteed per JEDEC standards and reflect actual accelerated life testing results. The device also meets 2000V HBM ESD rating and operates reliably under 3.3V ±10% or 5.0V ±10% supply conditions - all confirmed parameters critical for long-term deployment of the AT17LV512A-10JI in unattended industrial equipment.