DM74ALS564AWM

Overview

The DM74ALS564AWM is an octal D-type flip-flop with 3-state outputs manufactured by Fairchild Semiconductor. It utilizes the Advanced Low-power Schottky (ALS) TTL process for high-speed operation and low power consumption. The device features a single data input, clock input, and clear input to control eight independent D-type latches. Outputs are controlled by a common output enable input, allowing them to be placed in a high-impedance state. The component is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package, designated by the 'WM' suffix, suitable for surface-mount applications.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops within a single integrated circuit
• Advanced Low-power Schottky technology ensuring improved speed and reduced power dissipation compared to standard logic families
• Three-state output capability managed by a dedicated output enable input for effective bus isolation
• Functional compatibility with standard Schottky and Low-power Schottky TTL counterparts

Applications

• High-speed register storage in microprocessor-based systems
• Bidirectional bus buffering and data latching
• Parallel-to-serial conversion circuits
• Timing and synchronization logic in digital communication interfaces

Procurement Notes

Verify the specific manufacturer source, as this part number is distributed by multiple entities including ON Semiconductor and Rochester Electronics. Confirm that the SOIC-20 package matches the required footprint and pin pitch for your PCB design. Ensure the device meets the necessary voltage and temperature specifications for your target application environment before finalizing procurement.

Selection Notes

Select this component when an octal storage element with tri-state outputs is required in a space-constrained surface-mount design. The ALS series offers a balance of speed and power efficiency suitable for general-purpose digital logic. Consider the functional equivalence to older S and LS series parts if migrating from through-hole designs, while accounting for the different package dimensions and thermal characteristics of the SOIC form factor.

Part Context

This device belongs to the DM74ALS family of logic integrated circuits, which represents an evolution of the classic 74-series logic standards. The ALS technology was developed to provide faster switching speeds than Low-power Schottky devices while consuming less power than standard Schottky logic. This specific model implements the D-flip-flop function, widely used for temporary data storage and signal synchronization in complex digital architectures.

Replacement Considerations

The DM74ALS564A is functionally equivalent to the SN74ALS564. Verify cross-manufacturer compatibility regarding electrical parameters and timing characteristics. Alternative packages such as DIP or PLCC may be available under the same logical part number depending on the supplier.