SN74ACT7803-20DL

FIFOs Memory Overview

The SN74ACT7803-20DL is a 512-word by 18-bit synchronous FIFO memory manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 50 MHz. The device features independent read and write clocks, asynchronous reset logic, and programmable almost-full/almost-empty flags. It utilizes low-power advanced CMOS technology and is packaged in a 56-pin SSOP format.

FIFOs Memory Feature Summary

• Supports free-running read and write clocks that can be asynchronous or coincident
• Includes input-ready and output-ready flags synchronized to respective system clocks
• Features bidirectional configuration and width expansion capabilities without additional logic
• Utilizes patented output edge control circuitry to dampen simultaneous switching noise

FIFOs Memory Applications

• Buffering asynchronous datapaths at high clock rates
• Bidirectional data buffering configurations
• Word-width expansion for wider data buses

FIFOs Memory Procurement Notes

Verify the specific speed grade suffix (e.g., -20) against the required maximum clock frequency specifications. Confirm the package type matches the design footprint requirements. Ensure the operating temperature range aligns with the intended application environment. Cross-reference the datasheet revision date to confirm current production status and parameter validity.

FIFOs Memory Selection Notes

Select this component when a 512 x 18 bit depth is required with independent clock domains. Consider the -20 speed grade if the system operates at or below 50 MHz. Evaluate the need for programmable flag offsets versus default values. Verify compatibility with existing logic families regarding voltage levels and drive strength requirements.

FIFOs Memory Part Context

This part belongs to the Widebus family of FIFO memories from Texas Instruments. It shares pinout compatibility with related models such as the SN74ACT7805 and SN74ACT7813, facilitating design reuse across different memory depths or timing requirements within the same product line.

FIFOs Memory Replacement Considerations

The SN74ACT7803-15DL offers faster performance with a 67 MHz limit but maintains pin compatibility. The SN74ACT7805 provides similar functionality with potential differences in specific electrical characteristics or availability.