SN74ACT3632-20PCB

Overview

The SN74ACT3632-20PCB 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 120-pin Thin Quad Flat (PCB) package.

Feature Summary

• Contains two independent 512 × 36 clocked FIFOs buffering data in opposite directions
• Includes mailbox-bypass registers for each FIFO to bypass the main memory array
• Features programmable almost-full and almost-empty status flags synchronized to port clocks
• Supports asynchronous or coincident free-running clocks for Port A and Port B

Applications

• Buffering data between microprocessors and buses with synchronous control
• Interfacing with 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 ordering suffix PCB confirms the 120-pin Thin Quad Flat package type. Confirm the -20 speed grade matches the required 11 ns access time specifications. Ensure the operating temperature range of 0°C to 70°C aligns with the target environment requirements before procurement.

Selection Notes

Select this component when bidirectional data flow requires independent clock domains for each port. The device is suitable for applications needing programmable flag offsets for precise buffer management. Consider the 120-pin PCB package constraints for board layout. Verify compatibility with existing logic families if voltage levels differ from standard ACT specifications.

Part Context

This part belongs to the SN74ACT3632 family of clocked bidirectional FIFO memories. It is pin-to-pin compatible with the SN74ACT3622 and SN74ACT3642 variants. The device utilizes low-power 0.8-micron Advanced CMOS technology. It is characterized for commercial operation within a specified temperature range.

Replacement Considerations

The SN74ACT3622 and SN74ACT3642 are confirmed pin-to-pin compatible substitutes within the same product family.