Texas Instruments SN74HCS153DR

Overview

SN74HCS153DR from Texas Instruments is a dual 4-to-1 CMOS multiplexer with Schmitt-trigger inputs, operating across 2 V to 6 V supply voltage. It features ±7.8-mA output drive at 6 V, 100 nA typical supply current, and –40°C to +125°C ambient temperature range. Used for data routing in industrial control logic where noise immunity and slow-signal tolerance are required.

For engineers reviewing the SN74HCS153DR datasheet, SN74HCS153DR pinout, SN74HCS153DR application, or SN74HCS153DR equivalent, key selection criteria include Schmitt-trigger hysteresis (ΔVT ≥ 0.6 V at 6 V), dual-channel independent strobe control (1G/2G), propagation delay ≤14 ns at 6 V, and SOIC-16 package compatibility with legacy board layouts.

Technical Context

The SN74HCS153DR implements two independent 4:1 multiplexers sharing address inputs A and B but featuring separate active-low strobe terminals (1G and 2G) that force respective outputs low regardless of select state. Each channel selects one of four CMOS-compatible data inputs (C0–C3) based on binary address decoding.

Schmitt-trigger inputs provide hysteresis (ΔVT = 0.6–1.6 V depending on VCC), enabling reliable operation with slow-rising/falling signals and rejecting noise up to ±0.8 V peak-to-peak. Outputs use balanced CMOS push-pull drivers capable of sourcing/sinking up to ±7.8 mA at 6 V while maintaining VOH ≥ 5.4 V and VOL ≤ 0.33 V under load.

Key Specifications

Pinout & Package

SN74HCS153DR is supplied in a 16-pin SOIC (D) package measuring 9.90 mm × 3.90 mm, with standard 1.27-mm pitch and gull-wing leads compatible with automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCS153DR, SN74HCS253DR offers identical electrical performance but demands board-level adaptation, whereas CD74HC153M sacrifices noise immunity and ultra-low standby current for broader historical availability - making SN74HCS153DR optimal for new designs prioritizing robustness in harsh environments.

Availability

SN74HCS153DR is available at Aetrix Electronics and suitable for industrial sensor multiplexing, automotive body control units, programmable logic interfaces, and legacy system upgrades requiring stable component supply across extended temperature ranges.

Supply support for SN74HCS153DR 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 leader delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The SN74HCS153DR belongs to the HCS family of high-speed CMOS logic devices designed specifically for noise-immune data routing in electrically hostile environments such as factory automation and vehicle subsystems.

FAQ

What is the maximum operating frequency of the SN74HCS153DR?

The SN74HCS153DR supports a maximum switching frequency of 36 MHz at 6 V supply voltage, as specified in the Switching Characteristics table. This value decreases to 31 MHz at 4.5 V and 5 MHz at 2 V. The actual usable frequency depends on load capacitance (≤50 pF recommended), trace routing, and signal edge rates - all verified under conditions defined in the TI datasheet SCLS846.

Does the SN74HCS153DR require external pull-up resistors on its inputs?

No, the SN74HCS153DR does not require external pull-up resistors on its inputs because it integrates Schmitt-trigger circuitry with defined switching thresholds (VT+ and VT−). However, unused inputs must still be terminated to VCC or GND to prevent floating states; a 10-kΩ resistor is commonly used when flexibility is needed. Pull-ups are unnecessary for noise immunity since hysteresis provides inherent noise rejection.

Can the two multiplexer channels of the SN74HCS153DR operate independently?

Yes, the two multiplexer channels of the SN74HCS153DR operate independently via separate active-low strobe inputs (1G on Pin 1 and 2G on Pin 15). While both channels share the same address inputs (A and B), asserting either strobe forces only its corresponding output (1Y or 2Y) low - allowing asynchronous gating of individual data paths without affecting the other channel's selection state.

What is the purpose of the hysteresis specification for the SN74HCS153DR?

The hysteresis (ΔVT) in the SN74HCS153DR - ranging from 0.2 V to 1.6 V depending on supply voltage - prevents false triggering caused by slow input transitions or electrical noise. For example, at 6 V supply, ΔVT ≥ 0.6 V means the input must swing at least 600 mV between valid HIGH and LOW thresholds, effectively filtering out noise spikes below that amplitude and eliminating chatter on mechanical switch or long-cable signals.

Is the SN74HCS153DR pin-compatible with older 74LS153 or 74HC153 devices?

The SN74HCS153DR shares the same SOIC-16 pinout and logic function as the 74HC153 but is not pin-compatible with the bipolar 74LS153 due to differing internal architecture and drive strength. Compared to 74HC153, SN74HCS153DR adds Schmitt-trigger inputs and lower ICC (100 nA vs. 4 µA), making it a functional upgrade - though PCB layout remains identical for SOIC packages, enabling direct replacement in most cases.