Microchip Technology AT17N002-10TQC

Overview

AT17N002-10TQC 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 AT17N002-10TQC datasheet, AT17N002-10TQC pinout, AT17N002-10TQC application, or AT17N002-10TQC equivalent, this device serves as a drop-in replacement for Xilinx XC17SXXXA/L PROMs in legacy FPGA configuration systems requiring reliable nonvolatile storage, deterministic timing (55 ns CE-to-data delay), and industrial temperature support (–40°C to +85°C).

Technical Context

The AT17N002-10TQC implements a serial address counter and tri-state output buffer controlled directly by FPGA CCLK, CE, and RESET/OE signals-no external controller required. Its SER_EN pin enables two-wire ISP programming when pulled low, while tied high during normal FPGA boot.

It operates exclusively in Master Serial mode: DATA drives FPGA DIN, CLK receives FPGA CCLK, and CE/RESET/OE are driven by FPGA logic to manage output enable and counter reset. The device supports both commercial (0°C to 70°C) and industrial (–40°C to +85°C) temperature ranges with identical 3.3V supply requirements.

Key Specifications

Pinout & Package

AT17N002-10TQC is packaged in a 44-lead TQFP (10 mm × 10 mm, 0.8 mm pitch, 1.0 mm body height), JEDEC MS-026 ACB-compliant, with exposed thermal pad not internally connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT17N002-10TQC, AT17LV002-10CU offers broader supply voltage flexibility and lower active current but shares identical timing, packaging, and FPGA interface behavior; XC17V02 provides Xilinx-native integration but lacks ISP, industrial temp support, and TQFP-44 footprint compatibility.

Availability

AT17N002-10TQC is available at Aetrix Electronics and suitable for industrial PLCs, telecom baseband modules, avionics boot systems, and legacy test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for AT17N002-10TQC 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 programmable logic solutions for industrial, automotive, and communications markets.

The AT17N series was designed specifically as cost-effective, pin-compatible EEPROM-based configuration memory for Xilinx Spartan-family FPGAs, targeting legacy system maintenance and long-lifecycle industrial deployments.

FAQ

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

The AT17N002-10TQC serves as a serial configuration EEPROM that stores and delivers the bitstream to SRAM-based FPGAs-including Xilinx Spartan-II, Spartan-IIE, and Spartan XL-in Master Serial mode. During power-up, the FPGA controls the AT17N002-10TQC via CLK, CE, and RESET/OE to load its configuration. The AT17N002-10TQC requires no external controller and interfaces directly with FPGA control signals, making it a self-contained, deterministic boot solution.

Does the AT17N002-10TQC support in-system programming (ISP), and how is it enabled?

Yes, the AT17N002-10TQC supports two-wire serial ISP. It is enabled by pulling the VCC(SER_EN) pin low, which activates the internal ISP interface. During normal FPGA configuration, SER_EN must be tied to VCC. The AT17N002-10TQC does not require external programming voltages-the chip generates necessary internal programming voltages. This capability allows field updates without device removal, preserving board-level integrity.

What is the maximum clock frequency supported by the AT17N002-10TQC, and how does it vary with temperature grade?

The AT17N002-10TQC supports up to 15 MHz in commercial temperature range (0°C to +70°C) and 10 MHz in industrial range (–40°C to +85°C). This difference reflects timing margin validation under worst-case thermal conditions. The FPGA's CCLK must comply with these limits to ensure reliable bitstream readout; exceeding them may cause configuration failure or data corruption. Both grades maintain identical 55 ns CE-to-data delay specification.

How does the AT17N002-10TQC enter low-power standby mode, and what is its typical current draw?

The AT17N002-10TQC enters low-power standby mode when the CE pin is held high. In this state, internal address and bit counters are disabled, and the DATA output is tri-stated. For the industrial-grade AT17N002-10TQC, standby current is specified at ≤200 µA at 85°C and 3.3V. This feature reduces system-level quiescent power, especially useful in battery-backed or energy-constrained industrial applications where the FPGA may be powered down while retaining configuration readiness.

Is the AT17N002-10TQC pin-compatible with Xilinx XC17SXXXA and XC17SXXXXL PROMs, and what does that mean for PCB design?

Yes, the AT17N002-10TQC is explicitly documented as pin-compatible with Xilinx XC17SXXXA and XC17SXXXXL PROMs in the 44-lead TQFP package. This means all signal assignments-including DATA, CLK, CE, RESET/OE, VCC, GND, and SER_EN-match identically in pin position and electrical behavior. As a result, AT17N002-10TQC can replace those Xilinx PROMs on existing PCBs without layout modification, enabling seamless migration for obsolescence mitigation or enhanced reliability.