SN74V235-15PAG

Overview

The SN74V235-15PAG is a 2048 × 18-bit synchronous first-in, first-out (FIFO) memory from Texas Instruments. It operates with a 7.5-ns read/write cycle time and supports clock frequencies up to 133 MHz. The device utilizes 3.3-V VCC with 5-V input tolerance and features high-performance submicron CMOS technology. It includes programmable almost-empty and almost-full flags, half-full flag capability, and asynchronous or coincident read/write clocks. The component is packaged in a 64-pin Thin Quad Flat Package (TQFP).

Feature Summary

• Supports first-word fall-through or standard timing modes for flexible data access.
• Features dual-port synchronous interface with independent read and write clocks.
• Includes programmable offset registers for customizable empty and full flag thresholds.
• Enables depth expansion via daisy-chain configuration using expansion pins.

Applications

• DSP-to-processor communication interfaces
• DSP-to-analog front end buffering
• Network and video data communications

Procurement Notes

Verify the specific ordering suffix matches the required package and temperature range. Confirm that the '15' designation aligns with the intended speed grade or variant specifications provided in the official datasheet. Ensure compatibility with 3.3-V logic levels and 5-V tolerant inputs as specified for this family.

Selection Notes

Select this component when an 18-bit wide FIFO with 2048-word depth is required. Consider the SN74V235 if higher capacity than the SN74V215 or SN74V225 is needed but less than the SN74V245. Evaluate the need for programmable flags and FWFT mode support for system latency requirements.

Part Context

This part belongs to the SN74V2xx series of DSP-Sync FIFO memories. It shares architectural similarities with the SN74V215, SN74V225, and SN74V245, differing primarily in array depth. The series is designed for glueless interfacing with Texas Instruments TMS320 DSPs and general microprocessor systems requiring high-speed data buffering.

Replacement Considerations

SN74V215: 512 x 18 depth. SN74V225: 1024 x 18 depth. SN74V245: 4096 x 18 depth. All share identical pinouts and functional descriptions except for memory size and default flag offsets.