SN74ACT7811-20PN

FIFOs Memory Overview

The SN74ACT7811-20PN is a clocked first-in, first-out memory device with a storage capacity of 1024 words by 18 bits. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from 0°C to 70°C. The component features independent asynchronous inputs and outputs, allowing read and write operations to be synchronized to separate system clocks. It provides fast access times of 20 ns with a 50-pF load and includes programmable almost-full/almost-empty flags.

FIFOs Memory Feature Summary

• Supports read and write operations synchronized to independent system clocks for flexible data rate handling.
• Features programmable almost-full/almost-empty flags defined by user-defined or default offset values during reset cycles.
• Includes input-ready, output-ready, half-full, and define-almost-full status flags for comprehensive buffer monitoring.
• Enables expansion in both word width and word depth through cascading capabilities.

FIFOs Memory Applications

• High-speed data buffering between asynchronous systems
• Data rate matching in communication interfaces
• Cascaded FIFO memory arrays for increased depth or width

FIFOs Memory Procurement Notes

Verify the specific suffix PN indicates the 80-pin Thin Quad Flat package configuration. Confirm the -20 speed grade matches the required 20 ns access time specifications. Check current production status as older variants may be obsolete. Ensure RoHS compliance requirements align with project standards before finalizing procurement orders.

FIFOs Memory Selection Notes

Select this component when independent read and write clock domains are required. The 18-bit data width suits applications needing wider parallel data transfer than standard 8-bit or 16-bit options. Verify that the 80-pin LQFP package fits the available board space constraints compared to the 68-pin PLCC alternative.

FIFOs Memory Part Context

This part belongs to the Texas Instruments Widebus family of synchronous FIFO memories. It shares pin compatibility with other members like the SN74ACT7881 and SN74ACT7882 series. The device utilizes CMOS technology to provide high-output drive capabilities suitable for direct bus interfacing while maintaining low power consumption characteristics typical of the ACT logic family.

FIFOs Memory Replacement Considerations

Pin-to-pin compatible alternatives include the SN74ACT7881, SN74ACT7882, and SN74ACT7884. Verify that the replacement part meets the same 1024 x 18 bit organization and timing requirements.