AT17F040A-30JU

Overview

The AT17F040A-30JU is a 4-Mbit serial configuration memory device designed for Field Programmable Gate Arrays (FPGAs). It operates at a supply voltage of 3.3V with 5.0V tolerant I/O pins and supports maximum clock frequencies up to 33MHz during download, though the specific -30 suffix indicates a 30MHz operational limit. The component utilizes a low-power CMOS Flash process and features In-System Programmability via a 2-wire bus. It is housed in a 20-lead Plastic J-leaded Chip Carrier (PLCC) package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports In-System Programming (ISP) through a simple 2-wire serial interface.
• Provides direct compatibility with Altera FLEX, Excalibur, Stratix, Cyclone, and APEX devices.
• Enables cascading configurations to support higher-density FPGA arrays.
• Includes page download mode capability for storing multiple configuration bitstreams.

Applications

• Configuration of Altera FLEX series FPGAs
• Configuration of Altera Excalibur embedded FPGA systems
• Configuration of Altera Stratix and Cyclone series devices
• Configuration of Altera APEX series FPGAs

Procurement Notes

Verify that the ordering code matches the exact density and package requirements. Confirm the suffix 'U' denotes lead-free and halogen-free compliance. Ensure the '-30' grade aligns with the required clock frequency specifications for the target application environment.

Selection Notes

Select this component when configuring Altera-based SRAM FPGAs requiring non-volatile storage. Consider the 20-lead PLCC package for through-hole mounting needs. Verify that the 5.0V tolerant I/O meets the system's logic level requirements without additional translation circuitry.

Part Context

This part belongs to the AT17FxxxA Series of In-System Programmable Configuration PROMs manufactured by Microchip Technology (formerly Atmel). These configurators are specifically engineered to provide cost-effective, serial-access solutions for loading configuration programs into FPGA devices upon power-up or command.

Replacement Considerations

The AT17F080A-30JU serves as a compatible alternative offering double the memory density (8 Mbit) while maintaining identical pinouts and functionality. Both parts share the same 20-lead PLCC package and electrical characteristics.

FAQ

How does the device handle cascading for larger configurations?

The nCASC output goes Low when the internal address counter reaches its maximum value, allowing it to drive the nCS input of the next configurator in a daisy-chain sequence.

What is the function of the PAGE_EN input?

When driven High, PAGE_EN partitions the address space into four equal pages, enabling users to store and retrieve multiple configuration bitstreams from a single device using PAGESEL inputs.