SN74ACT3632-15PQG4

Overview

The SN74ACT3632-15PQG4 is a high-speed, low-power CMOS clocked bidirectional FIFO memory featuring two independent 512 × 36 dual-port SRAMs. It supports clock frequencies up to 67 MHz with read access times as fast as 11 ns. The device includes programmable almost-full and almost-empty flags synchronized to port clocks, mailbox-bypass registers for direct data transfer, and microprocessor interface control logic.

Feature Summary

• Contains two independent 512 x 36 synchronous FIFOs buffering data in opposite directions
• Includes mailbox-bypass registers for each FIFO to bypass the main queue
• Features programmable almost-full and almost-empty status flags
• Supports asynchronous or coincident clocking between Port A and Port B

Applications

• Buffering data in opposite directions between microprocessors
• Interfacing with floating-point digital signal processors
• Initializing DMA control via bypass registers
• Creating wider datapaths by using multiple devices in parallel

Procurement Notes

Verify the G4 suffix indicates lead-free and RoHS compliance per Texas Instruments standards. Confirm the PQG4 package designation corresponds to the 132-pin Plastic Quad Flat package. Ensure the -15 speed grade matches the required 11 ns access time and 67 MHz clock frequency specifications for the target application environment.

Selection Notes

Select this component when bidirectional data flow requires two independent FIFO structures within a single IC. It is suitable for applications needing flexible flag programming and mailbox bypass capabilities. Consider pin-to-pin compatibility with SN74ACT3622 and SN74ACT3642 if upgrading existing designs that utilize those specific variants.

Part Context

This part belongs to the SN74ACT3632 family of clocked bidirectional first-in, first-out memories manufactured by Texas Instruments. It utilizes advanced 0.8-micron CMOS technology for low power consumption. The device is characterized for operation from 0°C to 70°C and offers pin-to-pin compatibility with related SN74ACT series FIFOs.

Replacement Considerations

The SN74ACT3632 is pin-to-pin compatible with the SN74ACT3622 and SN74ACT3642. Verify functional equivalence regarding depth and width before substitution.