DM74ALS374N

Overview

The DM74ALS374N is an octal D-type flip-flop manufactured by onsemi in the 74ALS logic series. It features eight edge-triggered D-type flip-flops with three-state outputs, housed in a 20-pin PDIP package. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 35 MHz. Key electrical specifications include a maximum propagation delay of 16ns at 5V with 50pF load, high-level output current of 2.6mA, and low-level output current of 24mA. Static current consumption is 19 mA, and it functions within a temperature range of 0°C to 70°C.

Feature Summary

• Contains eight positive-edge-triggered D-type flip-flops for data storage applications.
• Outputs are three-state capable, allowing direct connection to bus systems without interface components.
• Totem-pole output design provides high-impedance states and increased drive capability for capacitive loads.

Applications

• Implementing buffer registers in digital circuits.
• Serving as I/O ports for interfacing with peripheral devices.
• Functioning as bidirectional bus drivers in organized systems.
• Operating as working registers within processing units.

Procurement Notes

Verify component authenticity through official datasheets and manufacturer documentation, as this part number is discontinued. Confirm that replacement options meet all electrical requirements, including the 4.5V to 5.5V supply range and 35 MHz clock frequency. Ensure the substitute device utilizes a compatible 20-pin DIP or equivalent package to maintain mechanical fit. Cross-reference pinouts and logic levels to guarantee functional equivalence in existing designs.

Selection Notes

Select this component for designs requiring octal storage with tri-state bus compatibility. The ALS series offers improved AC performance over standard LS counterparts. Consider the 16ns propagation delay and 35 MHz speed limits when designing timing-critical paths. The device is suitable for commercial temperature environments and provides sufficient drive current for low-impedance loads.

Part Context

This component belongs to the 74ALS family of high-speed TTL logic devices produced by onsemi. It is functionally related to other octal registers like the DM74LS374 but offers faster switching speeds. The device is designed for general-purpose digital logic applications where reliable data latching and bus driving are required.

Replacement Considerations

SN74ALS374AN from Texas Instruments is documented as a direct replacement. SN74LS374N is listed as a similar alternative, though it belongs to the slower LS series. Verify pinout compatibility and electrical specifications before substitution.