Texas Instruments SN74153N

Overview

SN74153N from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer in a 16-pin PDIP package, operating over 0°C to 70°C, with TTL-compatible inputs and outputs, typical propagation delay of 22 ns at VCC = 5 V, and fan-out capability of 10 LSTTL loads. It enables digital signal routing in legacy computing and industrial control logic systems.

For engineers reviewing the SN74153N datasheet, SN74153N pinout, SN74153N application, or SN74153N equivalent, this page provides verified functional identity, confirmed pin assignments, validated timing parameters, package-specific thermal and electrical limits, and documented drop-in alternatives for legacy system maintenance and redesign.

Technical Context

The SN74153N implements two independent 4:1 multiplexers sharing common select (S0, S1) and strobe (1G, 2G) inputs, each with four data inputs (1A0–1A3, 2A0–2A3) and one output (1Y, 2Y). Its TTL circuit architecture ensures compatibility with standard 74-series logic families and supports wired-OR expansion via active-low strobes.

It operates strictly at VCC = 5 V ±5%, draws ICC = 24 mA max per section under worst-case switching, and exhibits guaranteed high-level output voltage VOH ≥ 2.7 V at IOH = –0.4 mA and low-level output voltage VOL ≤ 0.5 V at IOL = 16 mA - meeting original 74153 specification requirements.

Key Specifications

Pinout & Package

SN74153N uses a 16-pin plastic dual in-line package (PDIP-N), 0.3-inch body width, with standard through-hole mounting and 0.1-inch pin pitch. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.

Compared with SN74153N, SN74LS153N delivers 7 ns faster propagation and 5 mA lower supply current while maintaining full pin and logic compatibility; SN74LS153NE4 adds RoHS compliance with no performance trade-off - both enable drop-in replacement in existing layouts.

Availability

SN74153N is available at Aetrix Electronics and suitable for industrial control logic, legacy computer bus arbitration, test equipment signal switching, and EPROM programming logic requiring stable component supply for long-lifecycle maintenance and repair programs.

Supply support for SN74153N includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company founded in 1930, specializing in analog, embedded processing, and logic technologies with broad industrial and automotive reach.

The SN74153N belongs to TI's original 7400-series TTL logic family, designed in the early 1970s for general-purpose digital system building blocks including multiplexers, decoders, and flip-flops used in computers, instrumentation, and control systems.

FAQ

Is SN74153N still in production?

No, SN74153N is officially obsolete per Texas Instruments' packaging addendum dated October 2016. TI discontinued manufacturing and no longer accepts new orders. Aetrix Electronics supplies remaining genuine inventory for legacy system support and repair, with full traceability and documentation for each lot.

What is the pinout compatibility between SN74153N and SN74LS153N?

SN74153N and SN74LS153N share identical 16-pin PDIP (N) package dimensions, pin numbering, and terminal functions - including VCC (pin 16), GND (pin 8), strobes (pins 1 and 15), selects (pins 2 and 14), inputs (pins 3–6, 10–13), and outputs (pins 7 and 9). This enables direct physical replacement without PCB modification.

Can SN74153N operate at 3.3 V?

No, SN74153N is specified only for 5 V ±5% operation. Its internal TTL transistor thresholds and output drive characteristics are not guaranteed below 4.75 V. Attempting 3.3 V operation results in undefined logic states, excessive propagation delay, and potential output contention - use SN74LVC153 or similar 3.3 V logic for modern low-voltage systems.

What is the maximum fan-out of SN74153N?

SN74153N supports a fan-out of 10 standard LSTTL loads per output, based on its guaranteed IOL = 16 mA and IOH = –0.4 mA specifications. Exceeding this limit risks marginal VOH/VOL levels and increased propagation delay due to capacitive loading beyond 15 pF per output node.

Does SN74153N include internal pull-up or pull-down resistors on inputs?

No, SN74153N has no internal biasing resistors. All inputs - including S0, S1, 1G, 2G, and data lines - require explicit external termination to VCC or GND when unused or driven by open-collector sources. Floating inputs may cause erratic output behavior or increased ICC due to intermediate logic states.