Texas Instruments SN74HCS153PWR

Overview

SN74HCS153PWR from Texas Instruments is a dual 4-to-1 CMOS multiplexer with Schmitt-trigger inputs, operating from 2 V to 6 V supply, delivering ±7.8-mA output drive at 6 V, supporting –40°C to +125°C ambient temperature, and used for high-noise industrial data routing and address decoding in microcontroller peripheral interfaces.

For engineers reviewing the SN74HCS153PWR datasheet, SN74HCS153PWR pinout, SN74HCS153PWR application, or SN74HCS153PWR equivalent, key selection criteria include Schmitt-trigger noise immunity, dual-channel independent strobe control, TSSOP-16 package compatibility, and low ICC (100 nA typical) for battery-backed logic systems.

Technical Context

The SN74HCS153PWR implements two independent 4:1 multiplexers sharing common address inputs (A, B) but featuring separate active-low strobe inputs (1G, 2G), enabling asynchronous channel enable/disable. Each channel selects one of four CMOS-compatible data inputs (C0–C3) based on binary address state.

All inputs integrate Schmitt-trigger circuitry with hysteresis (ΔVT = 0.6 V min at 6 V), ensuring reliable operation with slow-rising signals and rejecting noise up to ±0.3 V peak-to-peak. Outputs use balanced push-pull CMOS drivers capable of sourcing/sinking 7.8 mA at 6 V while maintaining VOH ≥ 5.4 V and VOL ≤ 0.33 V under load.

Key Specifications

Pinout & Package

TSSOP-16 package (5.00 mm × 4.40 mm body size), lead-free, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC153DR and 74LVC153PW, the SN74HCS153PWR uniquely combines wide-voltage operation (2–6 V), robust Schmitt-trigger noise rejection, and TSSOP-16 compactness - making it the sole option for space-constrained, mixed-voltage, high-noise industrial signal routing.

Availability

SN74HCS153PWR is available at Aetrix Electronics and suitable for industrial sensor aggregation, automotive diagnostic signal routing, and microcontroller GPIO expansion requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for SN74HCS153PWR 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 specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in high-reliability interface and signal-path components.

The SN74HCS153PWR belongs to TI's HCS logic family - designed specifically for noise-immune digital signal routing in harsh industrial, automotive, and infrastructure applications where signal integrity and low-power operation are critical.

FAQ

What is the maximum capacitive load the SN74HCS153PWR can drive while meeting all datasheet timing specifications?

The SN74HCS153PWR is characterized for CL = 50 pF in its switching characteristics table. At this load, propagation delay remains within 14 ns (max) at 6 V. Driving larger capacitances increases tpd and transition times nonlinearly; for loads exceeding 50 pF, derating of maximum operating frequency and verification of setup/hold margins against downstream receivers is required. The SN74HCS153PWR datasheet explicitly states that 50 pF is the test condition for guaranteed timing performance.

Does the SN74HCS153PWR require external pull-up or pull-down resistors on unused inputs?

Unused inputs on the SN74HCS153PWR must be terminated to either VCC or GND - they must not float. While Schmitt-trigger inputs reduce sensitivity to noise, floating inputs cause undefined logic states and increased ICC due to internal transistor contention. A 10-kΩ resistor is recommended for pull-up/pull-down, balancing leakage current (±100 nA) and transition speed. Direct connection is acceptable if the input is permanently unused.

Can both outputs (1Y and 2Y) of the SN74HCS153PWR be paralleled to increase drive strength?

Yes - the SN74HCS153PWR's balanced push-pull outputs allow paralleling of 1Y and 2Y when driven by identical address and strobe signals. This doubles output current capability to ±15.6 mA at 6 V. However, ensure both channels receive identical control inputs; mismatched strobe or address states will cause bus contention and excessive current flow. The SN74HCS153PWR datasheet confirms this practice in Section 9.2.1.3.

What is the minimum input voltage threshold (VT−) for the SN74HCS153PWR at 3.3 V supply?

At VCC = 3.3 V, the SN74HCS153PWR's negative switching threshold VT− is specified as 0.7 V (min) and 1.8 V (max) per the Electrical Characteristics table. This means an input must fall below 0.7 V to guarantee recognition as a logic LOW. The hysteresis window (ΔVT) ensures noise spikes up to 1.1 V peak-to-peak do not cause spurious transitions. These values are measured and guaranteed across –40°C to +125°C.

Is the SN74HCS153PWR pin-compatible with the older SN74LS153?

No - the SN74HCS153PWR is not pin-compatible with SN74LS153. Although both are dual 4-to-1 multiplexers in 16-pin packages, the LS version uses TTL logic levels, lacks Schmitt-trigger inputs, and has different pin functions (e.g., LS153 uses enable-active-HIGH, while SN74HCS153PWR uses active-LOW strobes). The SN74HCS153PWR pinout follows modern CMOS conventions and is incompatible with LS-series PCB layouts.