SN74V215-20PAG

Overview

The SN74V215-20PAG is a synchronous FIFO memory with a 512 x 18-bit organization. It supports clock frequencies up to 133 MHz and features read-access times as fast as 5 ns. The device operates on a 3.3-V supply voltage and includes programmable flags, first-word fall-through timing, and depth expansion capabilities.

Feature Summary

• Supports asynchronous or coincident read and write clocks for flexible interface control.
• Features single or double register-buffered empty and full flags for status monitoring.
• Allows user-programmable almost-empty and almost-full flags with default settings.
• Enables easy expansion in depth using daisy-chain techniques or FWFT mode.

Applications

• DSP-to-processor communication interfaces
• DSP-to-analog front end (AFE) buffering
• Network data communications
• Video signal processing

Procurement Notes

Verify the specific suffix '20' against official documentation to confirm performance grade or package variant. Confirm RoHS compliance status for the specific revision. Check for obsolescence notices or production lifecycle changes prior to final design approval.

Selection Notes

Select this component for applications requiring high-speed synchronous data buffering between disparate clock domains. Ensure the 512-word depth meets system requirements. Verify compatibility with 3.3-V logic levels and 5-V input tolerance if interfacing with legacy systems.

Part Context

This part belongs to the SN74V215/225/235/245 family of DSP-SYNC FIFO memories. The SN74V215 specifically provides a 512 x 18 array, distinguishing it from larger capacity variants like the SN74V225 (1K x 18). It is designed for glueless interfacing with Texas Instruments TMS320 DSPs.

Replacement Considerations

SN74V215-10PAG

FAQ

What is the difference between standard mode and FWFT mode?

In standard mode, the first word requires a specific read operation to appear on outputs. In FWFT mode, the first word appears automatically after three RCLK transitions without needing a read enable assertion.

How are the programmable flags configured?

The offset loading for almost-empty and almost-full flags is controlled by a state machine initiated by asserting the load pin (LD), allowing user-defined thresholds via the D0-D11 inputs.