DM74LS154N

Overview

The DM74LS154N is a 4-line to 16-line decoder/demultiplexer manufactured by onsemi. It decodes four binary-coded inputs into one of sixteen mutually exclusive outputs when both strobe inputs, G1 and G2, are LOW. The device operates within a supply voltage range of 4.75 V to 5.25 V. Typical propagation delay from data input to output is 35 ns maximum, while strobe-to-output delay reaches 35 ns maximum. Low-level output current is 8 mA, with high-level output current at -0.4 mA. Power dissipation is typically 45 mW.

Feature Summary

• Decodes four binary-coded inputs into one of sixteen mutually exclusive outputs
• Performs demultiplexing functions by distributing data from one input line to any one of sixteen outputs
• Includes input clamping diodes to minimize transmission-line effects and simplify system design
• Features high fan-out, low-impedance, totem-pole outputs

Applications

• High-performance memory decoders
• System address decoding
• Data distribution in digital logic circuits

Procurement Notes

Verify the component status as discontinued or obsolete through official manufacturer channels before procurement planning. Confirm RoHS compliance status, as older revisions may not meet current environmental standards. Ensure the PDIP-24 package matches your PCB footprint requirements. Validate that the operating temperature range of 0°C to +70°C aligns with your application environment. Check for available parameter-equivalent replacements if original stock is unavailable.

Selection Notes

Select this component for applications requiring precise decoding of four-bit binary addresses into sixteen distinct lines. The LS series offers standard TTL compatibility with moderate speed suitable for general-purpose logic systems. Consider the 8 mA low-level output drive capability for direct interfacing with standard TTL loads. Evaluate the 35 ns maximum propagation delay against your system timing constraints. Ensure the dual-strobe control mechanism fits your enable logic requirements.

Part Context

The DM74LS154 belongs to the 74LS (Low-power Schottky) logic family, known for balanced power consumption and speed. This specific part implements a 4-to-16 decoder architecture using bipolar transistor technology. It is housed in a 24-lead Plastic Dual-In-Line Package (PDIP). The device represents a legacy solution for address decoding tasks in industrial and commercial electronics designed during the TTL era.

Replacement Considerations

Public confirmed substitute part numbers include DM74LS154WM.