SN74V235-20PAG

Overview

The SN74V235-20PAG is a synchronous first-in, first-out (FIFO) memory featuring a 2048 x 18-bit organization and an 18-bit data bus. It supports clock frequencies up to 133 MHz with read access times as fast as 5 ns. The device operates on a single 3.3-V supply voltage and includes programmable almost-empty and almost-full flags. It is packaged in a 64-pin Thin Quad Flat Package (TQFP).

Feature Summary

• Supports asynchronous or coincident read and write clocks for flexible interface control.
• Features dual-register-buffered empty and full flags alongside programmable status indicators.
• Enables depth expansion through daisy-chaining or First-Word Fall-Through mode configurations.

Applications

• DSP-to-processor communication interfaces.
• Buffering between DSPs and analog front ends.
• Network and video data communications systems.

Procurement Notes

Verify the specific suffix '20' against official Texas Instruments documentation to confirm the maximum clock frequency rating. Ensure the TQFP-64 package matches the target PCB footprint requirements. Confirm RoHS compliance status prior to final procurement decisions.

Selection Notes

Select this component when a high-speed synchronous FIFO with an 18-bit width is required. Consider the 2048-word depth for buffering applications. Verify that the 3.3-V operating voltage aligns with the system power rails and that the 5-V input tolerance is necessary for interfacing.

Part Context

This part belongs to the SN74V2x5 family of DSP-Sync FIFO memories manufactured by Texas Instruments. The series includes variants with different depths such as 512, 1024, and 4096 words. All members share similar functional characteristics including high-performance submicron CMOS technology and standard flag logic.

Replacement Considerations

SN74V235-7PAG and SN74V235-10PAG are direct substitutes within the same family offering identical functionality but with lower maximum clock frequency ratings.