Microchip Technology AT17N512-10SC

Overview

AT17N512-10SC from Microchip Technology (formerly Atmel) is a 512-Kbit serial EEPROM FPGA configuration memory designed for Master Serial mode loading of Spartan-II, Spartan-IIE, and Spartan XL FPGAs. It operates at 3.3V ±10%, supports industrial temperature range (–40°C to +85°C), features low-power standby current ≤100 µA, and is packaged in 20-lead SOIC. Its primary role is nonvolatile storage and serial delivery of bitstream configuration data to SRAM-based FPGAs during power-up.

For engineers reviewing the AT17N512-10SC datasheet, AT17N512-10SC pinout, AT17N512-10SC application, or AT17N512-10SC equivalent, key selection criteria include compatibility with Xilinx Spartan family FPGAs in Master Serial mode, verified 20-lead SOIC package mapping, confirmed 512-Kbit density and 3.3V operation, and documented endurance (10 write cycles) and data retention (20 years at 85°C).

Technical Context

The AT17N512-10SC implements a simple serial-access interface synchronized to an external FPGA-provided CCLK signal, eliminating need for external controllers. Its internal address counter advances on CLK rising edge, and DATA output is tri-stated via RESET/OE (active-low reset, active-high OE) and CE (active-low chip enable) control signals.

It supports two operational modes: normal FPGA configuration mode (SER_EN = VCC) and Two-Wire Serial In-System Programming mode (SER_EN = Low). In configuration mode, it delivers bitstream data directly to FPGA DIN pin; in ISP mode, it accepts programming via dedicated two-wire bus without requiring high-voltage programming supplies.

Key Specifications

Pinout & Package

AT17N512-10SC is supplied in a 20-lead SOIC package (JEDEC MS-012, Variation AA), 0.300" wide body, with 0.050" lead pitch. Pin 1 identifier is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT17LV512-10SC, the AT17N512-10SC offers tighter 3.3V regulation tolerance and proven interoperability with legacy Spartan-II toolchains, while XCF05SVOG20 provides greater density but mandates full FPGA architecture upgrade and toolchain revalidation.

Availability

AT17N512-10SC is available at Aetrix Electronics and suitable for industrial PLCs, motor control units, legacy test equipment, and automated optical inspection systems requiring stable component supply and long-term lifecycle support.

Supply support for AT17N512-10SC 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 legacy Atmel configurator products including the AT17N series. The company specializes in microcontrollers, analog, FPGA configuration, and secure authentication ICs.

The AT17N series was developed specifically to provide cost-effective, pin-compatible EEPROM-based configuration memory for Xilinx Spartan-family FPGAs, addressing needs in industrial control, test equipment, and legacy system maintenance.

FAQ

What is the primary function of the AT17N512-10SC in an FPGA-based system?

The AT17N512-10SC serves as a serial configuration EEPROM that stores and delivers the bitstream to SRAM-based FPGAs-specifically Spartan-II, Spartan-IIE, and Spartan XL devices-in Master Serial mode. During power-up, it streams configuration data synchronously to the FPGA's DIN pin using the FPGA's CCLK signal, enabling autonomous, controller-free initialization. This function is integral to the AT17N512-10SC's design and ensures deterministic startup behavior without external logic.

Is the AT17N512-10SC pin-compatible with Xilinx XC17S512A PROMs?

Yes, the AT17N512-10SC is explicitly documented as pin-compatible with Xilinx XC17SXXXA and XC17SXXXXL PROMs. Its 20-lead SOIC footprint, signal mapping (including DATA, CLK, RESET/OE, CE, VCC, SER_EN, and GND), and electrical timing align with those devices, enabling direct replacement in existing Spartan-II designs without PCB modification. This compatibility is confirmed in the official Atmel datasheet section "Pin Compatible with Xilinx® XC17SXXXA and XC17SXXXXL PROMs".

Can the AT17N512-10SC be programmed in-system without removing it from the PCB?

Yes, the AT17N512-10SC supports In-System Programming (ISP) via its Two-Wire Serial interface, activated by pulling the SER_EN pin low. Programming can be performed using Atmel's ATDH2225 ISP Cable and compatible software tools. This capability allows field updates or factory programming without desoldering, and is a defined operational mode-not an optional feature-of the AT17N512-10SC.

What is the maximum clock frequency supported by the AT17N512-10SC during FPGA configuration?

The AT17N512-10SC supports a maximum clock frequency of 15 MHz in industrial temperature range (–40°C to +85°C), as specified in the AC Characteristics table of the datasheet. This timing parameter applies directly to the CLK input during normal configuration mode (SER_EN = VCC) and determines the upper limit for CCLK-driven bitstream transfer speed to compatible Spartan FPGAs.

Does the AT17N512-10SC require external high-voltage programming circuitry?

No, the AT17N512-10SC does not require external high-voltage programming circuitry. All programming voltages-including those needed for EEPROM cell writes-are generated internally during Two-Wire ISP mode. The device operates solely from its 3.3V supply (VCC) during both configuration and programming, simplifying system design and eliminating need for charge pumps or auxiliary power rails.