SN74ACT3632-15PQ

Overview

The SN74ACT3632-15PQ 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 respective port clocks. Each FIFO has a 36-bit mailbox-bypass register for direct data transfer. It operates from 0°C to 70°C in a 132-pin Plastic Quad Flat (PQ) package.

Feature Summary

• Contains two independent 512 × 36 synchronous FIFOs buffering data in opposite directions
• Includes 36-bit mailbox-bypass registers for each FIFO to bypass standard queuing
• Features programmable almost-full and almost-empty status flags synchronized to port clocks
• Supports asynchronous or coincident clocking between Port A and Port B

Applications

• Buffering data streams between microprocessors and buses with synchronous control
• Interfacing Texas Instruments floating-point digital signal processors
• Initializing DMA control using bypass registers
• Creating wider datapaths by connecting multiple devices in parallel

Procurement Notes

Verify the specific -15 speed grade suffix against current datasheets to confirm timing parameters. Confirm the PQ package designation matches the required 132-pin plastic quad flat form factor. Check for RoHS compliance documentation if environmental standards are mandatory. Ensure the operating temperature range of 0°C to 70°C meets system requirements.

Selection Notes

Select this component when dual-directional data buffering with independent clock domains is required. The 36-bit width suits wide data path applications. Consider the mailbox feature for command/control bypass needs. Verify that the 11 ns access time and 67 MHz clock support meet system throughput demands.

Part Context

Part of the SN74ACT3632 family of advanced CMOS FIFO memories. Pin-compatible with SN74ACT3622 and SN74ACT3642 variants. Utilizes 0.8-μm technology for low power consumption. Designed for high-speed synchronous interface applications requiring reliable data flow management between asynchronous systems.

Replacement Considerations

SN74ACT3622 and SN74ACT3642 are pin-compatible substitutes within the same family.