DM74AS873NT

Latches Overview

The DM74AS873NT is a dual 4-bit D-type transparent latch with 3-state outputs, manufactured by onsemi. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range of 0°C to +70°C. The device features propagation delays from data input to output ranging from 3ns to 6.5ns, and enable-to-output delays between 4ns and 11.5ns. Output drive capabilities include -15mA high-level current and 48mA low-level current. It utilizes a 24-lead plastic dual-in-line package (PDIP).

Latches Feature Summary

• Transparent D-type latching behavior where outputs follow inputs during the HIGH enable state.
• Three-state buffer outputs capable of driving bus lines directly without interface components.
• Bus-structured pinout arrangement to facilitate printed circuit board layout.

Latches Applications

• Buffer registers in digital systems
• I/O ports for microprocessor interfaces
• Bidirectional bus drivers
• Working registers in memory architectures

Latches Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm datasheet revision status as specifications may evolve. Ensure environmental compliance documentation matches project requirements. Validate package dimensions against PCB footprint constraints prior to procurement.

Latches Selection Notes

Select this component when direct bus driving capability is required without external pull-up resistors. Consider the AS logic family speed characteristics relative to system timing requirements. Evaluate the 24-pin PDIP package availability against surface-mount alternatives if space constraints exist.

Latches Part Context

This device belongs to the Advanced Schottky TTL logic family, designed for high-speed applications. It serves as a standard register solution for bus-oriented systems requiring high capacitive load driving. The transparent latch architecture distinguishes it from edge-triggered flip-flops.

Latches Replacement Considerations

Check for functional equivalents within the same logic family. Verify pin compatibility and electrical parameters before substitution. Review manufacturer obsolescence notices for long-term supply assurance.