Texas Instruments SN74HCS153QWBQBRQ1

Overview

SN74HCS153QWBQBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive 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 and typical ICC of 100 nA, used for data routing in engine control units and body electronics.

For engineers reviewing the SN74HCS153QWBQBRQ1 datasheet, SN74HCS153QWBQBRQ1 pinout, SN74HCS153QWBQBRQ1 application, or SN74HCS153QWBQBRQ1 equivalent, key selection criteria include automotive temperature range (–40°C to +125°C), wettable-flank WQFN-16 package compatibility, Schmitt-trigger noise immunity, and dual-channel independent strobe control.

Technical Context

The SN74HCS153QWBQBRQ1 implements two independent 4:1 multiplexers sharing common address inputs (A, B) but featuring separate active-low strobe inputs (1G, 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.

All inputs integrate Schmitt-trigger architecture with hysteresis (ΔVT = 0.6 V min at 6 V), enabling robust operation with slow-rising/falling or noisy signals; 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

SN74HCS153QWBQBRQ1 is housed in a 16-pin wettable-flank WQFN package (3.60 mm × 2.60 mm) with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced thermal performance (R_θJA = 97.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCS153PWQ1 and SN74LV153AQPWRQ1, the SN74HCS153QWBQBRQ1 uniquely combines wettable-flank manufacturability, wide 2–6 V operation, and Schmitt-trigger noise rejection - making it the only option qualified for high-reliability engine bay signal routing.

Availability

SN74HCS153QWBQBRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, infotainment displays, and ADAS camera systems requiring stable component supply across extended temperature ranges and full AEC-Q100 compliance.

Supply support for SN74HCS153QWBQBRQ1 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 automotive ICs, with decades of experience in high-reliability automotive electronics design and manufacturing.

The SN74HCS153QWBQBRQ1 belongs to TI's HCS logic family - engineered specifically for automotive signal routing applications requiring low power, noise immunity, and extended temperature operation without sacrificing speed or drive strength.

FAQ

What automotive qualification level does the SN74HCS153QWBQBRQ1 meet?

The SN74HCS153QWBQBRQ1 is AEC-Q100 qualified at Grade 1, supporting ambient operating temperatures from –40°C to +125°C. It also meets HBM ESD Classification Level 2 (±4 kV) and CDM ESD Classification Level C6 (±1.5 kV), as verified in the official TI datasheet SCLS817A. This makes SN74HCS153QWBQBRQ1 suitable for under-hood and chassis-mounted automotive modules where thermal and ESD stress are significant.

Does the SN74HCS153QWBQBRQ1 require external pull-up or pull-down resistors on its address inputs?

No - the SN74HCS153QWBQBRQ1 features Schmitt-trigger inputs with built-in hysteresis, eliminating the need for external pull-up or pull-down resistors on address lines A and B. However, unused inputs must still be terminated to VCC or GND to prevent floating states; internal Schmitt triggers do not eliminate undefined logic behavior from unconnected pins. The SN74HCS153QWBQBRQ1 datasheet explicitly recommends tying unused inputs to valid logic levels.

Can the two multiplexer channels in the SN74HCS153QWBQBRQ1 operate independently?

Yes - while the SN74HCS153QWBQBRQ1 shares address inputs A and B between both channels, each has its own active-low strobe input (1G and 2G) that independently forces the corresponding output (1Y or 2Y) low. This allows true independent channel control: one channel can be enabled while the other is gated off, enabling time-division multiplexing or fault isolation without changing address values. This behavior is confirmed in the Function Table (Table 8-1) of the SN74HCS153QWBQBRQ1 datasheet.

What is the maximum capacitive load the SN74HCS153QWBQBRQ1 can drive while meeting all specifications?

The SN74HCS153QWBQBRQ1 is characterized for CL = 50 pF in its switching characteristics table, and the datasheet states it "can drive a load with a total capacitance less than or equal to 50 pF while still meeting all of the datasheet specifications." Driving larger capacitive loads is possible but may degrade propagation delay, increase transition time, and reduce noise margin. For designs requiring >50 pF loads, buffer stages or layout optimization (shorter traces, reduced stubs) are recommended - as specified in Section 9.2.1.1 of the SN74HCS153QWBQBRQ1 application guidance.

Is the thermal pad on the SN74HCS153QWBQBRQ1 package required to be connected to ground?

No - the thermal pad on the SN74HCS153QWBQBRQ1 (WBQB package) may be connected to GND or left floating, as stated in the Pin Functions table of the datasheet. TI does not require grounding; however, connecting it to a GND plane improves thermal dissipation (reducing R_θJB to 66.4°C/W) and provides additional EMI shielding. It must never be connected to any signal or supply voltage other than GND. This design flexibility allows layout optimization based on board stack-up and grounding strategy in the SN74HCS153QWBQBRQ1 implementation.