Microchip Technology AT17N002-10TQI

Overview

AT17N002-10TQI from Atmel is a 2-Mbit (2,097,152 × 1-bit) serial EEPROM FPGA configuration memory operating at 3.3V ±10%, designed for Master Serial mode loading of Xilinx Spartan-II, Spartan-IIE, and Spartan XL FPGAs. It features low-power standby mode (200 µA industrial), 10 write cycles endurance, 20-year data retention at 85°C, and uses a simple serial interface with CLK, DATA, CE, and RESET/OE control signals.

For engineers reviewing the AT17N002-10TQI datasheet, AT17N002-10TQI pinout, AT17N002-10TQI application, or AT17N002-10TQI equivalent, this device serves as a drop-in replacement for Xilinx XC17SXXXA/L PROMs in FPGA configuration systems requiring reliable nonvolatile storage, industrial temperature operation (–40°C to +85°C), and TQFP-based board integration.

Technical Context

The AT17N002-10TQI implements a synchronous serial interface where the FPGA's CCLK drives the EEPROM's CLK input, and the DATA output feeds the FPGA's DIN pin. Configuration begins automatically on power-up when SER_EN is tied high, with address counting controlled jointly by CE (active-low chip enable) and RESET/OE (dual-function reset/output enable).

It supports two operational modes: normal FPGA configuration mode (SER_EN = VCC) and Two-Wire Serial In-System Programming mode (SER_EN = low). In standby mode (CE high), current draw drops to ≤200 µA at 3.3V, and all timing parameters-including TCAC (CLK-to-data delay ≤60 ns), TOE (OE-to-data delay ≤55 ns), and FMAX (10 MHz max clock frequency)-are specified for industrial temperature range.

Key Specifications

Pinout & Package

AT17N002-10TQI is housed in a 44-lead Thin Quad Flat Package (TQFP) with 10 mm × 10 mm body size, 1.0 mm maximum thickness, and 0.8 mm lead pitch. Pin 1 is marked by a corner chamfer or dot; pins are arranged in clockwise order starting from top-left when viewed from top with marking facing up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT17N002-10TQI, AT17LV002-10TQI offers superior endurance and voltage flexibility while maintaining full pin and functional compatibility, whereas XC17S200A lacks reprogrammability, voltage compatibility, and TQFP packaging - making it unsuitable for new 3.3V industrial designs.

Availability

AT17N002-10TQI is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based motor control units, legacy Spartan XL field upgrades, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for AT17N002-10TQI 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

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and FPGA configuration solutions for industrial and embedded applications.

The AT17N series was designed specifically to provide cost-effective, pin-compatible EEPROM-based configuration memory for Xilinx Spartan-family FPGAs, addressing the need for field-reprogrammable, industrial-temperature-capable alternatives to OTP PROMs.

FAQ

What is the primary function of the AT17N002-10TQI in an FPGA-based system?

The AT17N002-10TQI serves as a serial configuration EEPROM that stores and delivers the bitstream required to configure SRAM-based Xilinx Spartan-II, Spartan-IIE, and Spartan XL FPGAs in Master Serial mode. It operates autonomously under FPGA control-using CLK, CE, and RESET/OE signals-without requiring an external processor. The AT17N002-10TQI ensures reliable, repeatable FPGA initialization at power-up or reset, leveraging its 2-Mbit capacity, industrial temperature rating, and proven EEPROM data retention.

Can the AT17N002-10TQI be reprogrammed in-system, and what is required to do so?

Yes, the AT17N002-10TQI supports in-system programming (ISP) via its Two-Wire Serial interface. To enter ISP mode, the SER_EN pin must be driven low while VCC remains at 3.3V; standard industry programmers or Atmel's ATDH2225 ISP Cable can then perform read/write/verify operations. This capability allows field updates without removing the AT17N002-10TQI from the PCB, preserving board integrity and reducing maintenance downtime.

What are the key timing constraints for interfacing the AT17N002-10TQI with a Spartan-II FPGA?

The AT17N002-10TQI specifies critical timing parameters for industrial operation: maximum clock frequency of 10 MHz, CLK-to-DATA delay (TCAC) ≤60 ns, OE-to-DATA delay (TOE) ≤55 ns, and CE setup time to CLK (TSCE) ≥30 ns. These values ensure robust synchronization with Spartan-II CCLK and DIN timing windows. The AT17N002-10TQI's fixed 0 ns hold time (TOH) simplifies timing closure, and its 25 ns minimum CLK high/low times align directly with Spartan-II requirements.

Is the AT17N002-10TQI pin-compatible with Xilinx XC17S200A, and what modifications are needed for replacement?

No, the AT17N002-10TQI is not pin-compatible with XC17S200A. While both target Spartan-II configuration, XC17S200A uses 8-lead PDIP or SOIC packages and operates at 5V, whereas AT17N002-10TQI uses 44-lead TQFP and requires 3.3V. Direct replacement would necessitate PCB redesign, voltage translation, and layout changes. For pin-compatible migration, AT17N002-10TQI replaces XC17S200A only in systems already using TQFP footprints and 3.3V rails - not as a drop-in for legacy 5V PDIP sockets.

How does the standby current of the AT17N002-10TQI impact system-level power management?

The AT17N002-10TQI draws ≤200 µA in standby mode (CE = high) at 3.3V and 85°C, enabling effective power gating during FPGA idle periods. This low quiescent current allows system designers to maintain the AT17N002-10TQI powered while the FPGA is held in reset or powered down, ensuring immediate configuration readiness upon wake-up. Unlike volatile alternatives, the AT17N002-10TQI retains its bitstream without backup power, eliminating auxiliary battery or capacitor circuits.