Microchip Technology AT17F080-30TQC

Overview

AT17F080-30TQC 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 APEX™ devices. It delivers 33 MHz serial download speed, supports 5,000 write cycles, operates at 3.3 V ±10%, and features 5V-tolerant I/O pins. Its primary role is master-serial mode configuration memory in industrial-grade embedded systems.

For engineers reviewing the AT17F080-30TQC datasheet, AT17F080-30TQC pinout, AT17F080-30TQC application, or AT17F080-30TQC equivalent, key selection criteria include cascading capability via CEO/CE daisy-chain, page-selectable 8-Mbit address space (00000h–7FFFFh), 44-lead TQFP packaging with 10 mm × 10 mm footprint, industrial temperature range (−40°C to +85°C), and compatibility with Atmel ISP programming tools.

Technical Context

The AT17F080-30TQC implements a serial-access flash memory architecture with dedicated control logic for FPGA configuration sequencing. It uses a 2-wire ISP interface (SER_EN low) for in-system programming and a master-serial interface (SER_EN high) for FPGA-driven configuration via CLK/DATA/CEO handshaking.

Its internal logic includes a programmable address counter, page-select decoder (PAGESEL[1:0] + PAGE_EN), tri-state DATA output with open-collector capability, and power-on reset detection via READY. The device supports both single-device configuration and cascaded chains where CEO of one unit enables CE of the next, enabling multi-FPGA or high-density bitstream loading.

Key Specifications

Pinout & Package

AT17F080-30TQC is housed in a 44-lead Thin Quad Flat Package (TQFP) with 10 mm × 10 mm body, 1.0 mm thickness, and 0.8 mm lead pitch (JEDEC MS-026 ACB). Pin 1 is marked by a corner chamfer and dot; leads are gull-wing shaped with coplanarity ≤0.10 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC18V08 and AT17F080-30BJI, the AT17F080-30TQC offers broader FPGA vendor compatibility (Xilinx, Altera, Lucent, Motorola), smaller 10 mm × 10 mm TQFP footprint, and unique page-select capability - making it optimal for multi-vendor, space-constrained, and field-reconfigurable industrial systems.

Availability

AT17F080-30TQC is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and FPGA-based prototyping requiring stable component supply, long lifecycle support, and guaranteed traceable sourcing.

Supply support for AT17F080-30TQC 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 AT17F Series was designed specifically as cost-effective, in-system programmable configuration memory for SRAM-based FPGAs - emphasizing ease of integration, cascading scalability, and industrial-grade reliability.

FAQ

What is the primary function of the AT17F080-30TQC in an FPGA-based system?

The AT17F080-30TQC serves as a serial configuration PROM that stores and delivers FPGA bitstreams during power-up or reconfiguration. It interfaces directly with SRAM-based FPGAs (e.g., Xilinx Virtex®, Altera APEX™) in master-serial mode, using CLK, DATA, and CEO signals to synchronize bitstream loading without external controllers. Its 8-Mbit capacity supports large, complex FPGA designs.

Does the AT17F080-30TQC support in-system programming, and how is it enabled?

Yes, the AT17F080-30TQC supports in-system programming (ISP) via a 2-wire serial interface. ISP is activated by driving the SER_EN pin Low, which reconfigures DATA and CLK as bidirectional programming lines. The device is programmed at its nominal 3.3 V supply - no external high-voltage programming signals are required. Internal circuitry generates necessary programming voltages.

How does the page-select feature of the AT17F080-30TQC improve FPGA system flexibility?

The AT17F080-30TQC's PAGE_EN and PAGESEL[1:0] pins partition its 8-Mbit memory into four independent 2-Mbit pages (00000h–1FFFFh, etc.). This allows a single AT17F080-30TQC to store multiple FPGA configurations - such as test, calibration, production, and fail-safe bitstreams - and load any one on demand. The FPGA selects the target page by setting PAGESEL inputs before initiating configuration.

Can the AT17F080-30TQC be used in daisy-chain configurations, and what is required?

Yes, the AT17F080-30TQC supports daisy-chain cascading via its CEO (Chip Enable Output) and CE (Chip Enable) pins. When the first device reaches end-of-memory, its CEO goes Low, enabling the CE input of the next AT17F080-30TQC in the chain. This allows sequential loading of bitstreams across multiple FPGAs or expansion beyond 8 Mbit. All devices must share the same CLK and DATA lines.

What are the key electrical differences between the AT17F080-30TQC and the AT17F080-30BJI?

The AT17F080-30TQC uses a 44-lead TQFP package (10 mm × 10 mm), while the AT17F080-30BJI uses a 44-lead PLCC package (17.4 mm × 17.4 mm). Electrically, both share identical memory size, timing, and I/O characteristics. However, the TQFP version has higher thermal resistance (θJA = 62°C/W vs. 50°C/W for PLCC), making the PLCC slightly better for high-ambient-temperature applications with limited airflow.