SN74V3690-7PEU

Overview

The SN74V3690-7PEU is a 3.3-V CMOS first-in, first-out (FIFO) memory featuring a 32768 × 36 bit organization and 128-pin TQFP packaging. It supports 166-MHz operation with a 6-ns read/write cycle time. The device allows user-selectable bus sizing for both input and output ports, supporting configurations of ×36, ×18, or ×9 bits. It includes 5-V tolerant inputs, big-endian/little-endian selectable byte representation, and programmable almost-empty/full flags with selectable synchronous or asynchronous timing modes.

Feature Summary

• Supports flexible bus matching on both read and write ports with selectable widths of ×36, ×18, or ×9 bits.
• Features independent read and write clocks allowing simultaneous data operations without frequency restrictions.
• Includes zero-latency retransmit capability to reread data from the FIFO beginning without disturbing write pointers.
• Provides programmable almost-empty and almost-full flags with selectable default offsets and timing modes.

Applications

• Network buffering
• Video signal processing
• Telecommunications systems
• Data communications interfaces

Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature range. Confirm that the 5-V tolerant input specification aligns with system interface requirements. Ensure master reset configuration pins are correctly set during power-up to establish the desired bus width and timing mode.

Selection Notes

Select this component when deep memory depth combined with high-speed 3.3-V operation is required. Consider the SN74V3690 for applications needing variable bus width conversion between subsystems. Evaluate the need for independent clock domains and programmable flag thresholds before finalizing the design.

Part Context

This part belongs to the SN74V36x0 series of high-performance submicron CMOS FIFO memories. The series offers varying memory depths from 1024 to 32768 words, all maintaining a 36-bit word width base. These devices are designed for high-density data buffering in digital logic applications.

Replacement Considerations

SN74V3690-6PEU