SN74ABT7819A-30PN

FIFOs Memory Overview

The SN74ABT7819A-30PN is a high-speed, low-power BiCMOS clocked bidirectional first-in, first-out (FIFO) memory device. It integrates two independent 512 × 18 dual-port SRAM FIFOs to buffer data in opposite directions. The -30 speed grade supports maximum clock frequencies up to 33.3 MHz with propagation delays of 4 ns to 14 ns under a 50-pF load. It operates on a single 4.5 V to 5.5 V supply and features programmable almost-full/almost-empty flags, half-full indicators, and input/output ready signals synchronized to independent asynchronous or coincident port clocks.

FIFOs Memory Feature Summary

• Integrates two independent 512-word by 18-bit dual-port SRAM arrays for simultaneous bidirectional data buffering
• Supports asynchronous or coincident free-running clocks for Port A and Port B synchronization
• Features programmable almost-full and almost-empty flag offsets via dedicated program enable pins
• Provides hardware status flags including half-full, input-ready, and output-ready states

FIFOs Memory Applications

• Synchronous-to-asynchronous clock domain crossing buffers
• Data rate matching between microprocessors and peripheral buses
• High-speed serial-to-parallel conversion interfaces
• Network switch packet buffering systems

FIFOs Memory Procurement Notes

Verify the specific -30 speed grade suffix matches the required 33.3 MHz operational frequency. Confirm the PN package designation corresponds to the 80-pin Thin Plastic Quad Flatpack form factor. Ensure the component meets the specified 0°C to 70°C commercial temperature range requirements for the target application environment.

FIFOs Memory Selection Notes

Select this component when designing systems requiring dual-directional data flow with independent clock domains. The 18-bit word width suits applications needing wider data paths than standard 8-bit or 16-bit FIFOs. The programmable flag thresholds allow customization of interrupt triggers based on specific buffer occupancy levels.

FIFOs Memory Part Context

This device belongs to Texas Instruments' Widebus family of logic components. It utilizes advanced BiCMOS technology to achieve high performance while maintaining low power consumption. The SN74ABT7819A provides a specialized solution for complex interface management where standard unidirectional FIFOs are insufficient for bidirectional traffic control.

FIFOs Memory Replacement Considerations

Public confirmed substitute part numbers: SN74ABT7819A-10PN, SN74ABT7819A-12PN, SN74ABT7819A-15PN, SN74ABT7819A-20PN.