SN74ACT3641-30PQ

Overview

The SN74ACT3641 is a high-speed, low-power CMOS clocked FIFO memory with a capacity of 1024 words by 36 bits. It supports clock frequencies up to 67 MHz and features fast access times of 11 ns. The device utilizes Low-Power 0.8-μm Advanced CMOS technology and operates within a temperature range of 0°C to 70°C. It includes two 36-bit mailbox registers for control communication and offers synchronous read-retransmit capability.

Feature Summary

• Dual-port architecture with independent asynchronous or coincident clocks for Port A and Port B
• Synchronous retransmit capability allowing repeated data access from user-selected positions
• Programmable almost-full and almost-empty flags synchronized to respective port clocks
• Integrated mailbox registers for bypassing the main memory buffer

Applications

• Buffering data between microprocessors and buses with synchronous control
• Creating wider datapaths using parallel device configurations
• DSP-interface applications requiring programmable filtering
• Initializing DMA control via mailbox-bypass registers

Procurement Notes

Verify the specific package variant required, as the SN74ACT3641 family includes 120-pin Thin Quad Flat (PCB) and 132-pin Plastic Quad Flat (PQ) options. Confirm that the operating environment falls within the specified 0°C to 70°C commercial temperature range before finalizing procurement specifications.

Selection Notes

Select this component when interfacing systems require a 36-bit wide data path with deep buffering capabilities. Ensure the design accommodates the dual-clock domain requirements, as CLKA and CLKB can operate asynchronously. Consider the pin-to-pin compatibility with SN74ACT3631 and SN74ACT3651 if upgrading existing designs.

Part Context

This device belongs to the Texas Instruments SN74ACT series of advanced CMOS logic components. It is specifically designed as a clocked first-in, first-out memory solution. The part is characterized for commercial operation and is compatible with standard ACT logic families, providing a robust interface for high-speed digital signal processing tasks.

Replacement Considerations

The SN74ACT3641 is pin-to-pin compatible with the SN74ACT3631 and SN74ACT3651. Verify functional equivalence regarding flag synchronization and mailbox operations when substituting these parts.