SN74V215-7PAG

Overview

The SN74V215-7PAG is a high-speed, low-power CMOS 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 with 5-V input tolerance. It includes programmable almost-empty and almost-full flags, half-full flag capability, and supports both first-word fall-through and standard timing modes.

Feature Summary

• Supports asynchronous or coincident read and write clocks for flexible interface control
• Features single or double register-buffered empty and full status flags
• Allows user-programmable offset loading for almost-empty and almost-full conditions
• Enables depth expansion through daisy-chain techniques or first-word fall-through mode

Applications

• DSP-to-processor communication interfaces
• Buffering between DSPs and analog front ends (AFE)
• Network data communications systems
• Video signal processing applications

Procurement Notes

Verify the specific suffix 'PAG' corresponds to the 64-pin Thin Quad Flat Package configuration. Confirm that the '-7' speed grade meets the required system timing constraints. Ensure the component matches the 3.3-V VCC specification and 5-V tolerant input requirements for your target logic family.

Selection Notes

Select this component when a 512 x 18-bit synchronous buffer is required for high-speed data transfer. It is suitable for designs needing independent read/write clocks and programmable flag thresholds. Consider the 64-pin TQFP package dimensions for PCB layout compatibility.

Part Context

This part belongs to the SN74V215/225/235/245 family of DSP-Sync FIFO memories. While other variants offer different depths such as 1024, 2048, or 4096 words, the SN74V215 specifically provides the 512-word capacity. All members share identical pinouts and functional descriptions regarding flag logic and expansion capabilities.

Replacement Considerations

SN74V215-10PAG

FAQ

How does the First-Word Fall-Through (FWFT) mode differ from Standard mode?

In FWFT mode, the first word written to an empty FIFO appears on the outputs after three RCLK transitions without requiring a Read Enable assertion. In Standard mode, a specific read operation using REN is required to shift the first word to the outputs.

What is the function of the LD pin?

The Load (LD) pin controls access to the internal offset registers. When LD is low, data on inputs D0–D11 writes to the offset registers on the WCLK edge, allowing users to program the almost-empty and almost-full flag thresholds.