SN74ACT3631-30PQ

Overview

The SN74ACT3631-30PQ is a high-speed, low-power CMOS clocked FIFO memory featuring a 512 × 36 dual-port SRAM architecture. It supports clock frequencies up to 67 MHz and provides fast access times of 11 ns. The device utilizes advanced 0.8-micron CMOS technology and includes retransmit capability for previously read data. It features programmable almost-full and almost-empty flags synchronized to independent port clocks.

Feature Summary

• Supports asynchronous or coincident free-running clocks for Port A and Port B
• Includes synchronous read-retransmit capability for repeated data access
• Features two 36-bit mailbox registers for command and control information transfer
• Provides programmable almost-full and almost-empty status flags

Applications

• Buffering data between microprocessors and buses with synchronous control
• Creating wider datapaths by connecting multiple devices in parallel
• Expanding word depth through serial expansion capabilities
• DSP-interface applications requiring flexible buffering

Procurement Notes

Verify the specific suffix '30PQ' against official Texas Instruments documentation to confirm package type and temperature range. Ensure compatibility with existing PCB footprints for the 132-pin Plastic Quad Flat (PQ) package. Confirm that the operating voltage and signal levels match the system requirements before integration.

Selection Notes

Select this component when a high-density, dual-port FIFO with independent clock domains is required. It is suitable for applications needing retransmit functionality and programmable flag offsets. Consider pin-to-pin compatibility with the SN74ACT3641 and SN74ACT3651 if alternative options are needed within the same family.

Part Context

The SN74ACT3631 belongs to the SN74ACT series of advanced CMOS logic devices manufactured by Texas Instruments. It is part of a family of clocked FIFO memories designed for high-speed data buffering. The device is characterized for operation from 0°C to 70°C and is available in 120-pin Thin Quad Flat (PCB) and 132-pin Plastic Quad Flat (PQ) packages.

Replacement Considerations

The SN74ACT3631 is pin-to-pin compatible with the SN74ACT3641 and SN74ACT3651. These parts can be used as direct replacements if they meet the specific timing and functional requirements of the design.