SN74ACT7805-40DL

FIFOs Memory Overview

The SN74ACT7805-40DL is a synchronous first-in, first-out memory device featuring a 256-word by 18-bit organization. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 25 MHz with a maximum access time of 20 ns. The component utilizes low-power advanced CMOS technology and includes independent write and read clocks that can be asynchronous or coincident. It provides status flags including input-ready, output-ready, half-full, and programmable almost-full/almost-empty indicators.

FIFOs Memory Feature Summary

• Supports bidirectional configuration and width expansion without additional logic
• Features patented output edge control circuitry to dampen simultaneous switching noise
• Includes programmable almost-full/almost-empty flag depth offsets
• Provides asynchronous reset functionality synchronized to clock transitions

FIFOs Memory Applications

• Buffering asynchronous data paths in high-speed digital systems
• Bidirectional data buffering configurations between system components
• Word-width expansion for increasing data bus capacity beyond 18 bits

FIFOs Memory Procurement Notes

Verify the specific suffix DL indicates the shrink small-outline package variant. Confirm the -40 speed grade corresponds to the 20 ns access time specification. Ensure the operating temperature range matches the 0°C to 70°C requirement for your application environment. Check current production status as this series may have discontinued variants.

FIFOs Memory Selection Notes

Select this component when an 18-bit wide synchronous FIFO buffer is required with independent clock domains. The -40 speed grade suits applications needing up to 25 MHz operation. Consider pin-to-pin compatibility with SN74ACT7803 and SN74ACT7813 if design flexibility is needed. Evaluate the need for programmable flags versus default offset settings.

FIFOs Memory Part Context

This part belongs to the Widebus family of logic devices from Texas Instruments. It is designed for buffering data paths using low-power advanced CMOS technology. The device is packaged in a 56-pin shrink small-outline format. It shares functional similarities with other members of the 74ACT78xx series but differs in timing specifications and synchronization modes.

FIFOs Memory Replacement Considerations

Pin-to-pin compatible substitutes include SN74ACT7803 and SN74ACT7813. Verify timing parameters match the system requirements when substituting. Ensure the replacement device supports the same 18-bit data width and 256-word depth.