SN74ACT7808-20FN

FIFOs Memory Overview

The SN74ACT7808-20FN is a 2048-word by 9-bit asynchronous FIFO memory manufactured by Texas Instruments. It utilizes low-power advanced CMOS technology and supports data rates up to 50 MHz with typical access times of 15 ns under a 50-pF load. The device operates within a supply voltage range of 4.5 V to 5.5 V and features three-state outputs. It includes programmable almost-full/almost-empty flags, half-full status indication, and expansion logic for depth cascading. The component is housed in a 44-pin plastic leaded chip carrier (FN) package.

FIFOs Memory Feature Summary

• Supports independent load and unload clock operations for asynchronous data transfer
• Features programmable almost-full and almost-empty offset values via dedicated control inputs
• Includes hardware expansion logic enabling depth cascading of multiple units
• Provides comprehensive status monitoring through full, empty, and half-full output flags

FIFOs Memory Applications

• High-speed data buffering between asynchronous system domains
• Depth expansion configurations requiring extended storage capacity
• Parallel data processing systems utilizing bit-parallel formats

FIFOs Memory Procurement Notes

Verify the specific -20 speed grade suffix against current manufacturer documentation to confirm timing parameters. Confirm the FN package designation matches the required 44-pin plastic leaded chip carrier form factor. Ensure design compatibility with the specified 4.5 V to 5.5 V operating voltage range and check for any relevant product change notices or end-of-life announcements prior to finalizing procurement.

FIFOs Memory Selection Notes

Select this component when designing systems requiring 2048 words of 9-bit storage with asynchronous clock domains. Consider the 15 ns typical access time and 50 MHz maximum frequency for high-speed interface requirements. Evaluate the need for programmable flag thresholds and depth expansion capabilities. Verify that the 44-pin PLCC package fits the target PCB layout constraints and thermal management requirements.

FIFOs Memory Part Context

This part belongs to the SN74ACT7808 family of strobed first-in, first-out memories from Texas Instruments. The family offers various speed grades and package options, including thin quad flat and reduced-height quad flat packages. All variants share the same core 2048 x 9 architecture and functional specifications, differing primarily in switching characteristics and physical housing dimensions.

FIFOs Memory Replacement Considerations

Check for SN74ACT7808 devices with different speed grades or package codes such as PAG or PM. Verify pinout compatibility and electrical parameter alignment before substitution.