DM74S253N

Overview

The DM74S253N is a dual 3-state 1-of-4 line data selector/multiplexer manufactured by onsemi. It features Schottky-clamped transistors and complementary binary decoding for direct bus interfacing. The device operates within a supply voltage range of 4.75V to 5.25V and supports an operating temperature range of 0°C to +70°C. Propagation delays from data to output are typically 6ns, while select-to-output delays are typically 12ns. Power dissipation is typically 275mW.

Feature Summary

• Dual sections with common address inputs A and B
• Separate output control inputs for each four-line section
• Schottky-diode-clamped transistors for high-speed operation
• High fan-out totem-pole outputs

Applications

• Bus-organized system data line interfacing
• Parallel-to-serial conversion
• Multiplexing from N lines to 1 line

Procurement Notes

Verify the component status as obsolete or end-of-life before procurement planning. Confirm package compatibility with existing PCB footprints, specifically the 16-lead plastic dual-in-line (PDIP) configuration. Ensure that any replacement components maintain equivalent electrical characteristics and pinout assignments to avoid redesign efforts.

Selection Notes

Select this component for applications requiring dual multiplexing with high-speed switching capabilities. Consider the specific propagation delay requirements when designing timing-critical circuits. Verify that the power supply constraints align with the recommended operating conditions to ensure reliable performance across the specified temperature range.

Part Context

This part belongs to the 74S series of logic integrated circuits, characterized by Schottky technology for improved speed over standard TTL. It serves as a functional equivalent to the S153 but includes three-state output capability. The device is designed for digital systems requiring efficient data routing and signal selection.

Replacement Considerations

• SN74S253N

FAQ

What is the typical propagation delay from data to output?

The typical propagation delay from data to output is 6 ns.

How many address inputs are shared between the two sections?

Address inputs A and B are common to both sections.