SN74ACT7803-25DL

FIFOs Memory Overview

The SN74ACT7803-25DL is a synchronous first-in, first-out memory device featuring a 512-word by 18-bit organization. It operates within a supply voltage range of 4.5 V to 5.5 V and supports clock frequencies up to 40 MHz. The component provides an access time of 15 ns with a 50-pF load and draws a maximum supply current of 400 µA. Designed for surface-mount applications, it utilizes a 56-pin SSOP package and functions reliably across an operating temperature range of 0°C to +70°C.

FIFOs Memory Feature Summary

• Supports asynchronous or coincident free-running read and write clocks
• Enables bidirectional data buffering configuration without additional logic
• Features programmable almost-full/almost-empty flag depth offsets
• Incorporates patented output edge control circuitry to dampen simultaneous switching noise

FIFOs Memory Applications

• Buffering asynchronous datapaths in high-speed digital systems
• Configuring bidirectional data transfer between independent clock domains
• Expanding word width for wider data bus architectures

FIFOs Memory Procurement Notes

Verify the specific speed grade suffix (e.g., -25) matches the required clock frequency and timing constraints for your design. Confirm that the SSOP-56 package dimensions align with your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the datasheet revision date to confirm the accuracy of electrical characteristics before finalizing procurement.

FIFOs Memory Selection Notes

Select this component when a 512 x 18 bit capacity is required for synchronous FIFO operations. Consider the -25 speed grade if system timing demands a maximum clock frequency of 40 MHz. Evaluate the need for programmable flags if custom buffer thresholds are necessary. Verify compatibility with existing TTL-compatible logic levels and ensure adequate power supply decoupling for the CMOS technology used.

FIFOs Memory Part Context

This device belongs to the Texas Instruments Widebus family of logic components. It shares pinout compatibility with related parts such as the SN74ACT7805 and SN74ACT7813, facilitating easier integration into existing designs requiring different timing speeds or configurations within the same product line.

FIFOs Memory Replacement Considerations

The SN74ACT7803-15DL offers faster performance at 67 MHz. The SN74ACT7803-20DL provides a 50 MHz option. The SN74ACT7803-40DL is suitable for lower frequency applications at 25 MHz. All variants maintain identical pinouts and functionality.