74HC40105PW,112

Overview

The 74HC40105PW,112 is a high-speed Si-gate CMOS asynchronous FIFO register manufactured by Nexperia. It provides elastic storage for 16 words of 4-bit data. The device operates with independent shift-in and shift-out clocks, allowing it to buffer data between systems running at different rates. It features 3-state outputs controlled by an active LOW enable input. Status indicators include Data-In-Ready (DIR) and Data-Out-Ready (DOR) flags. The component supports supply voltages from 2 V to 6 V and includes input clamp diodes for interfacing with voltages exceeding VCC.

Feature Summary

• Asynchronous operation allows handling of input and output data at different shifting rates
• Provides status indication via DIR and DOR flags to manage flow control
• Features 3-state outputs for bus line sharing capabilities
• Includes reset capability and expandable architecture for system integration

Applications

• Buffering data between asynchronous digital systems
• Data rate conversion interfaces
• Elastic storage registers in communication protocols
• System synchronization buffers

Procurement Notes

Verify the specific suffix '112' against the manufacturer's current ordering information to confirm package type and tape/reel specifications. Confirm RoHS compliance status as per the latest product change notification. Check for end-of-life notices or alternative package options if long-term supply assurance is required.

Selection Notes

Select this component when designing interfaces requiring buffering between clock domains with different frequencies. Ensure the logic family voltage levels match the system requirements, as the HC variant uses CMOS input levels. Consider the operating temperature range and power dissipation limits relative to the application environment.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is pin-compatible with the older 4000B series 40105 but offers improved switching speeds and lower power consumption. The device is part of a broader family of FIFO and memory logic components designed for general-purpose digital applications.

Replacement Considerations

Direct functional equivalents include the 74HCT40105 for TTL-compatible input levels. Other 4-bit x 16-word FIFOs from the same logic family may serve as alternatives if pinout compatibility is not strictly required.