Microchip Technology AT17LV002A-10QI

Overview

AT17LV002A-10QI from Microchip (formerly Atmel) is a 2-Mbit serial FPGA configuration EEPROM designed for industrial-grade SRAM-based FPGAs including Altera APEX™ and FLEX®, Xilinx Virtex® and Spartan®, Lucent ORCA®, and Motorola MPA1000 devices. It operates at 3.3V (±10%) or 5.0V (±10%), supports in-system programming via 2-wire bus, delivers 15 MHz max clock frequency (3.3V), and provides 90-year data retention at 85°C.

For engineers reviewing the AT17LV002A-10QI datasheet, AT17LV002A-10QI pinout, AT17LV002A-10QI application, or AT17LV002A-10QI equivalent, key selection criteria include cascading support via nCASC/nCS daisy-chain, programmable reset polarity, WP1 write protection, standby current ≤150 µA (industrial), and TQFP-32/PLCC-20 package compatibility with legacy Altera EPC2 replacement requirements.

Technical Context

The AT17LV002A-10QI implements a serial master-configuration interface where DCLK drives the internal address counter, DATA outputs configuration bits to FPGA DIN, and RESET/OE controls tri-state output and counter reset. Its SER_EN pin enables 2-wire ISP mode when low, while nCASC asserts low upon end-of-memory to cascade to downstream configurators.

It features dual-voltage operation (3.3V/5V), programmable reset polarity stored in EEPROM, and hardware write protection via WP1 input-available only on AT17LV512A/010A/002A variants. The device uses CMOS EEPROM process with 100,000 write cycles and integrates internal oscillator control synchronized to FPGA master clock timing.

Key Specifications

Pinout & Package

AT17LV002A-10QI is available in 32-lead TQFP (32A) and 20-lead PLCC (20J) packages. Both are industrial-grade, RoHS-compliant, and share identical pin functions per datasheet Rev. 2322D–CNFG–07/02. The TQFP measures 7×7 mm with 0.8 mm pitch; PLCC is 9.78×9.78 mm with J-leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT17LV002A-10QI, the AT17LV002-10QI offers identical density and temperature rating but removes WP1 for cost reduction, while Intel EPC2LC20 restricts voltage, package, and cascade capability - making AT17LV002A-10QI the only option supporting 3.3V/5V dual-rail, TQFP-32, and robust daisy-chain deployment.

Availability

AT17LV002A-10QI is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based motor drives, and telecom baseband units requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AT17LV002A-10QI 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 series as part of its broad FPGA configuration and nonvolatile memory portfolio.

The AT17LV family was engineered specifically for reliable, pin-compatible replacement of Altera EPC-series EEPROMs in SRAM FPGA configuration - emphasizing industrial temperature operation, cascading flexibility, and in-system programmability.

FAQ

What is the primary function of the AT17LV002A-10QI in an FPGA system?

The AT17LV002A-10QI serves as a serial configuration memory that loads the bitstream into SRAM-based FPGAs such as Xilinx Virtex or Altera APEX upon power-up. It interfaces directly with FPGA control pins (DCLK, DATA, nCS, RESET/OE) and requires no external controller. The AT17LV002A-10QI supports master-serial mode, enabling autonomous FPGA initialization with precise timing alignment via READY and programmable reset polarity.

Does the AT17LV002A-10QI support both 3.3V and 5V operation?

Yes, the AT17LV002A-10QI supports dual supply voltages: 3.3V ±10% and 5.0V ±10% for industrial temperature range (-40°C to +85°C). This allows direct integration into mixed-voltage systems without level-shifting circuitry. The AT17LV002A-10QI's DC and AC characteristics are fully specified for both rails in the official datasheet Rev. 2322D–CNFG–07/02.

How does cascading work with multiple AT17LV002A-10QI devices?

Cascading uses the nCASC output of one AT17LV002A-10QI connected to the nCS input of the next device. When the first device reaches end-of-memory, nCASC goes low, enabling the second AT17LV002A-10QI to begin outputting its data stream. This daisy-chain method scales configuration memory beyond 2 Mbit without additional logic, and all devices share the same DCLK signal from the FPGA master.

What is the purpose of the WP1 pin on the AT17LV002A-10QI?

The WP1 pin on the AT17LV002A-10QI provides hardware write protection for memory blocks during in-system programming. It is active when driven high and disables writes to the lowest memory block. This pin is exclusive to AT17LV512A/010A/002A variants and is absent on smaller-density members of the family. The AT17LV002A-10QI implements WP1 to enhance field-programming security in mission-critical deployments.

Is the AT17LV002A-10QI compatible with Xilinx Spartan FPGAs?

Yes, the AT17LV002A-10QI is explicitly listed as compatible with Xilinx XC3000™, XC4000™, XC5200™, Spartan®, and Virtex® FPGAs in the official Atmel documentation. Its timing parameters (e.g., TCAC = 55 ns @ 3.3V industrial) meet Spartan-III and Spartan-6 master-serial interface requirements, and RESET/OE polarity can be programmed to match Xilinx OE-high conventions during initial programming.