DM74AS573N

Latches Overview

The DM74AS573N is an octal D-type transparent latch with 3-state outputs manufactured by onsemi. It utilizes an advanced oxide-isolated, ion-implanted Schottky TTL process to deliver high-speed performance and low power consumption. The device features a bus-structured pinout for efficient PCB layout, with data inputs on one side and outputs on the other. It operates within a supply voltage range of 4.5V to 5.5V and supports a free air operating temperature from 0°C to +70°C.

Latches Feature Summary

• Advanced oxide-isolated, ion-implanted Schottky TTL process ensures improved AC performance over comparable devices while consuming approximately half the power.
• Bus structured pinout arrangement places all data inputs on one side and all outputs on the opposite side to ease printed circuit board layout.
• Totem-pole 3-state outputs are designed specifically for driving highly-capacitive or relatively low-impedance loads directly without interface components.

Latches Applications

• Implementing buffer registers in digital systems
• Configuring I/O ports for peripheral interfacing
• Serving as bidirectional bus drivers in bus-organized architectures

Latches Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Check datasheet revisions for updated electrical characteristics. Ensure storage conditions comply with moisture sensitivity levels. Validate compatibility with existing system voltage requirements before integration.

Latches Selection Notes

Select this component when high-speed latching with direct bus driving capability is required. Consider the 20-lead PDIP package for through-hole applications. Evaluate power dissipation limits against thermal constraints. Compare propagation delays with system timing requirements. Verify functional equivalence if replacing legacy S-TTL variants.

Latches Part Context

This part belongs to the 74AS logic family, known for high speed and low power consumption compared to standard TTL. It serves as a functional equivalent to the DM74S373 but offers improved AC performance. The device is suitable for general-purpose digital logic applications requiring reliable data storage and bus isolation.

Latches Replacement Considerations

The DM74AS573N is functionally equivalent to the DM74S373. Substitutes should maintain compatible 3-state output characteristics and Schottky TTL input thresholds. Verify package dimensions and pinout alignment during replacement to ensure mechanical fit.

Latches FAQ

How does the output control affect internal latch operation?

The output control input places the outputs in a high-impedance state but does not affect the internal operation of the latches. Data can be retained or entered even while the outputs are disabled.

What is the switching characteristic regarding power consumption?

The device offers improved AC performance over the DM74S373 at approximately half the power due to its advanced oxide-isolated, ion-implanted Schottky TTL process.