Microchip Technology AT17F080-30JI

Overview

AT17F080-30JI 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®, and XC4000™ families. It operates at 3.3V ±10%, supports 33 MHz serial download, offers 5,000 write cycles, and features 5V-tolerant I/O pins for robust system interfacing.

For engineers reviewing the AT17F080-30JI datasheet, AT17F080-30JI pinout, AT17F080-30JI application, or AT17F080-30JI equivalent, this device serves as a drop-in configuration memory solution for industrial-grade FPGA master serial mode systems requiring reliable nonvolatile storage, cascading capability, and ISP via 2-wire bus.

Technical Context

The AT17F080-30JI implements a serial-access flash memory architecture with integrated logic for FPGA configuration sequencing. Its control interface (CLK, CE, RESET/OE, SER_EN) directly maps to FPGA master serial mode timing requirements, enabling autonomous configuration without external controllers.

It supports both flat-address (0x00000–0x7FFFF) and 4-page partitioned addressing (via PAGESEL[1:0] and PAGE_EN), with CEO output enabling daisy-chain cascading. The device enters low-power standby (<1 mA) when CE is high and SER_EN is high, and uses internal charge pumps for 3.3V-only programming.

Key Specifications

Pinout & Package

AT17F080-30JI is packaged in a 20-lead Plastic Leaded Chip Carrier (PLCC), 20J footprint (JEDEC MS-018, Variation AA), measuring 10.0 mm × 10.0 mm × 3.2 mm with 1.27 mm lead pitch and J-bend leads. This package provides mechanical robustness and thermal performance suitable for industrial PCB assembly and reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC18V08 and AT17F080-30JC, the AT17F080-30JI uniquely combines industrial temperature operation, 4-page memory partitioning, and 2-wire ISP-making it the only choice for field-upgradable, thermally rugged FPGA configuration in embedded systems.

Availability

AT17F080-30JI is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based test equipment, telecom baseband units, and avionics reconfigurable radios requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT17F080-30JI 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 to provide cost-effective, in-system programmable configuration memory for SRAM-based FPGAs-including Xilinx, Altera, and Lucent devices-emphasizing ease of integration, cascading scalability, and industrial reliability.

FAQ

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

The AT17F080-30JI 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®, Spartan®) in Master Serial mode, using CLK, DATA, CE, and RESET/OE signals to autonomously load configuration data without external controllers. Its 8-Mbit capacity supports medium-to-large FPGAs, and its industrial temperature rating ensures reliability in demanding environments.

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

Yes, the AT17F080-30JI supports in-system programming (ISP) via a 2-wire serial interface. ISP is enabled by driving the SER_EN pin Low, which switches the device from configuration mode to programming mode. In this mode, A2 (pin 14) functions as a chip-select input, and standard 3.3V-level signals are used-no external high-voltage programming supplies are required. Programming can be performed using Atmel's ATDH2200E system or compatible third-party programmers.

Can multiple AT17F080-30JI devices be cascaded, and what pin enables this?

Yes, multiple AT17F080-30JI devices can be cascaded to extend total configuration memory capacity. Cascading is enabled by connecting the CEO (Chip Enable Output) pin of one device to the CE (Chip Enable) pin of the next. When the first device completes its data stream, CEO goes Low, enabling the second device's DATA output. This daisy-chain mechanism requires no additional logic or timing control and is fully supported in the AT17F080-30JI's hardware design.

What is the purpose of the PAGE_EN and PAGESEL pins on the AT17F080-30JI?

The PAGE_EN and PAGESEL[1:0] pins enable 4-page memory partitioning of the AT17F080-30JI's 8-Mbit address space. When PAGE_EN is High, the memory is divided into four 2-Mbit segments; PAGESEL[1:0] selects which segment is accessed during serial download. This allows a single AT17F080-30JI to store up to four distinct FPGA bitstreams (e.g., boot, debug, upgrade, fail-safe), selectable dynamically by the host system-enhancing flexibility in field-deployed reconfigurable systems.

Is the AT17F080-30JI pin-compatible with other members of the AT17F family, such as the AT17F040-30JI?

Yes, the AT17F080-30JI shares identical pinouts with the AT17F040-30JI in the same package variant-in this case, the 20-lead PLCC (20J). Both devices use the same signal mapping, timing behavior, and electrical characteristics, allowing direct substitution in existing designs when higher density is needed. However, the AT17F040-30JI provides only 4 Mbit, so layout and firmware must verify address space compatibility before replacement.