Microchip Technology AT17F080-30TQI

Overview

AT17F080-30TQI from Atmel is an 8-Mbit in-system programmable serial configuration PROM designed to store FPGA bitstreams for SRAM-based FPGAs including Xilinx Virtex®, Spartan®, XC4000™, and Altera FLEX® devices. It delivers 33 MHz serial download speed, 5V-tolerant I/O pins, and operates from 2.97–3.63 V over –40°C to +85°C. Its TQFP-44 package supports daisy-chain cascading via CEO/CE interface.

For engineers reviewing the AT17F080-30TQI datasheet, AT17F080-30TQI pinout, AT17F080-30TQI application, or AT17F080-30TQI equivalent, key selection criteria include industrial temperature support, 8-Mbit density with page-select capability, 3.3V core/5V-tolerant I/O compatibility, ISP via 2-wire bus, and cascading readiness for multi-FPGA systems.

Technical Context

The AT17F080-30TQI implements a serial flash memory architecture optimized for FPGA master-serial configuration mode, using a simple CLK/DATA/CE/RESET/OE interface directly driven by the FPGA's CCLK and control signals. Its internal address counter and tri-state DATA output are synchronized to FPGA clocking without external logic.

It supports both flat-address (0x00000–0x7FFFF) and 4-page partitioned addressing (via PAGESEL[1:0] and PAGE_EN), enabling storage of up to four independent bitstreams. In cascaded configurations, CEO asserts low upon end-of-data to enable the next device's CE input, ensuring seamless daisy-chain operation.

Key Specifications

Pinout & Package

AT17F080-30TQI is housed in a 44-lead Thin Quad Flat Package (TQFP), 10 mm × 10 mm × 1.0 mm body, 0.8 mm lead pitch, JEDEC MS-026 ACB-compliant. Pin 1 identifier marked with corner chamfer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC18V08PC44C and MX25L8006EM1I-12G, the AT17F080-30TQI uniquely integrates FPGA-optimized control logic (CEO, READY, SER_EN), 5V-tolerant I/O, and native page-select capability - eliminating external glue logic and enabling direct, standards-compliant integration across Xilinx, Altera, and Lucent FPGA families.

Availability

AT17F080-30TQI is available at Aetrix Electronics and suitable for industrial automation, telecommunications infrastructure, and test & measurement equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for AT17F080-30TQI 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.

The AT17F Series was developed specifically to simplify and standardize FPGA configuration in industrial and communications systems, offering plug-and-play serial PROMs with robust temperature grading and multi-vendor FPGA compatibility.

FAQ

What is the maximum configuration clock frequency supported by the AT17F080-30TQI?

The AT17F080-30TQI supports a maximum input clock frequency of 33 MHz during FPGA configuration (when SER_EN = high). This specification applies across its full industrial temperature range (–40°C to +85°C) and ensures fast bitstream loading for Xilinx Virtex and Altera FLEX devices. The 33 MHz limit is defined in the AC Characteristics table under FMAX (SEREN = 1).

Does the AT17F080-30TQI support in-system programming (ISP), and what interface is used?

Yes, the AT17F080-30TQI supports in-system programming via a 2-wire serial interface activated by pulling SER_EN low. During ISP mode, the A2 pin functions as a chip-select input, and DATA/CLK serve as bidirectional data/clock lines. Programming occurs at the nominal 3.3V supply - no external high-voltage programming signals are required.

How does the AT17F080-30TQI handle cascading with multiple FPGAs or configuration PROMs?

The AT17F080-30TQI uses its CEO (Chip Enable Output) pin to enable cascading: when its internal address counter reaches the end of memory (or selected page), CEO goes low, which drives the CE input of the next AT17F device in the chain. This automatic handoff eliminates need for external sequencing logic and ensures deterministic, glitch-free multi-device configuration.

What is the purpose of the PAGE_EN and PAGESEL[1:0] pins on the AT17F080-30TQI?

PAGE_EN and PAGESEL[1:0] enable 4-way memory partitioning of the 8-Mbit address space (0x00000–0x7FFFF) into four 2-Mbit pages. When PAGE_EN = high, PAGESEL[1:0] selects one of the pages (00–11); when PAGE_EN = low, the full 8-Mbit space is accessed linearly. This allows storage and rapid retrieval of up to four distinct FPGA configurations in a single AT17F080-30TQI device.

Is the AT17F080-30TQI pin-compatible with other packages in the AT17F series, such as the 44-lead PLCC version?

No, the AT17F080-30TQI (44-lead TQFP) is not pin-compatible with the AT17F080-30BJI (44-lead PLCC), despite identical pin count and function set. Pinouts differ: for example, DATA is at pin 40 in TQFP but pin 2 in 44-lead PLCC; CLK is at pin 43 in TQFP but pin 5 in 44-lead PLCC. Layout redesign is required when substituting between these packages.