SN74V3690-10PEU

Overview

The SN74V3690-10PEU is a 3.3-V CMOS first-in, first-out (FIFO) memory with a 32768 × 36 bit organization and 1 Mbit storage capacity. It operates at frequencies up to 166 MHz with a 6-ns read/write cycle time. The device features user-selectable bus sizing for input and output ports in widths of 36, 18, or 9 bits. It supports independent read and write clocks, big-endian/little-endian byte representation, and programmable almost-empty/full flags. The component is housed in a 128-pin Thin Quad Flat Pack (TQFP).

Feature Summary

• Supports flexible bus matching with configurable input and output port widths of 36, 18, or 9 bits.
• Provides zero-latency retransmit capability allowing data rereading from the FIFO start without disturbing write pointers.
• Features programmable almost-empty and almost-full flags with selectable synchronous or asynchronous timing modes.
• Includes standard and first-word fall-through (FWFT) timing modes for varied latency requirements.

Applications

• Network buffering systems requiring large data storage capacity.
• Video signal processing applications needing bus size adaptation.
• Telecommunications equipment utilizing high-speed data transfer.
• Data communications interfaces managing unequal bus sizes.

Procurement Notes

Verify that the ordering suffix 'PEU' corresponds to the 128-pin TQFP package as specified in the datasheet. Confirm the '-10' speed grade matches the required 166 MHz operational frequency. Ensure the voltage supply aligns with the 3.3-V CMOS specification. Check for RoHS compliance status if environmental regulations apply to the specific manufacturing batch.

Selection Notes

Select this component when deep memory depth of 32768 words is required alongside high-speed operation. Choose this part for designs needing independent read and write clock domains. Consider this device for applications requiring variable bus width conversion between 36, 18, and 9 bits. Evaluate the need for programmable flag offsets and retransmit functionality before finalizing the design.

Part Context

This device belongs to the SN74V36x0 family of high-performance submicron CMOS FIFO memories. The family includes variants with different depths ranging from 1024 to 32768 words, all maintaining a 36-bit base width. The SN74V3690 represents the highest density option within this specific series, offering maximum storage capacity while retaining the same pinout and feature set as smaller counterparts.

Replacement Considerations

Public confirmed substitute: SN74V3690-6PEU. This alternative offers similar functionality but may differ in speed grade or specific timing characteristics. Verify electrical compatibility and pin configuration before substitution.