SN74ACT7811-18PN

FIFOs Memory Overview

The SN74ACT7811-18PN is a 1024-word by 18-bit clocked first-in, first-out memory device manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 40 MHz with access times as fast as 15 ns under specified load conditions. The component utilizes independent asynchronous inputs and outputs, allowing read and write operations to be synchronized to separate system clocks. It features programmable almost-full/almost-empty flags and input-ready, output-ready, and half-full status indicators.

FIFOs Memory Feature Summary

• Supports independent read and write synchronization via dedicated clock inputs
• Includes programmable almost-full/almost-empty flag functionality
• Provides comprehensive status monitoring through input-ready, output-ready, and half-full flags
• Enables expansion in both word width and word depth

FIFOs Memory Applications

• High-speed data buffering between asynchronous systems
• Data rate matching in communication interfaces
• Temporary storage for interrupt handling
• System buffer applications requiring independent clock domains

FIFOs Memory Procurement Notes

Verify the specific speed grade suffix (e.g., -15, -18) required for your timing constraints, as performance varies across variants. Confirm package availability, noting that this specific PN package variant may have limited production status compared to other options. Ensure design compatibility with the 80-pin Thin Quad Flat package dimensions and pinout before finalizing procurement.

FIFOs Memory Selection Notes

Select this component when a wide 18-bit data path is required alongside deep 1024-word storage capacity. It is suitable for designs needing independent clock domains for read and write operations without complex external logic. Consider the 80-pin PN package if space-saving is prioritized over the 68-pin PLCC option. Verify that the 4.5 V to 5.5 V operating voltage aligns with the system power rails.

FIFOs Memory Part Context

This device belongs to the Texas Instruments Widebus family of FIFO memories. It is part of the SN74ACT series, designed for high-speed CMOS logic applications. The SN74ACT7811 offers pin-to-pin compatibility with related models such as the SN74ACT7881, SN74ACT7882, and SN74ACT7884, facilitating design reuse across different memory configurations within the same product line.

FIFOs Memory Replacement Considerations

The SN74ACT7811-18FN is a pin-compatible alternative available in a 68-pin PLCC package. Other members of the Widebus family, including the SN74ACT7881, SN74ACT7882, and SN74ACT7884, offer similar functionality with potential differences in organization or speed grades.