DM74AS374WM

Overview

The DM74AS374WM is an octal D-type flip-flop from the Advanced Schottky (AS) TTL series, manufactured by Fairchild Semiconductor. It features eight edge-triggered D-type flip-flops with 3-STATE outputs in a 20-lead Small Outline Integrated Circuit (SOIC) package. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 60 MHz at nominal supply. Propagation delay is specified at 8 ns under standard load conditions. The component is designed for industrial temperature ranges and includes input clamping diodes to minimize transmission-line effects.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops in a single package
• Advanced Schottky technology ensuring high-speed switching performance comparable to bipolar logic
• 3-STATE output capability allowing direct bus interfacing without additional interface components
• Input clamping diodes integrated to suppress transmission-line ringing and simplify system design

Applications

• High-speed buffer registers in digital systems
• Bidirectional bus drivers for data transfer applications
• I/O port implementations requiring fast response times
• Working registers in complex logic circuits

Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor has been integrated into ON Semiconductor. Confirm that the part number suffix corresponds to the SOIC-20 surface mount package. Ensure compliance with current environmental regulations such as RoHS status. Check for availability of equivalent AS-series parts if this specific variant is discontinued or obsolete. Validate pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component when high-speed logic processing is required alongside low power dissipation relative to standard TTL. The 3-STATE outputs are essential for bus-oriented architectures where multiple devices share data lines. Consider the AS series for applications demanding faster propagation delays than LS or ALS families provide. Ensure the operating environment supports the specified voltage and temperature ranges. Evaluate board space constraints given the SOIC-20 footprint.

Part Context

This device belongs to the 74AS family, which represents Advanced Schottky TTL logic. This series was developed to offer improved speed over standard 74S devices while maintaining lower power consumption than earlier high-speed variants. The octal flip-flop architecture allows for compact implementation of 8-bit data storage elements. The SOIC packaging facilitates automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers include DM74AS374N and DM74AS374M. Verify pinout and electrical specifications match exactly. Check if alternative manufacturers offer compatible AS-series equivalents.