Texas Instruments SN74LV157APWR

Overview

SN74LV157APWR from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer operating from 2 V to 5.5 V, delivering 7.5 ns max propagation delay at 5 V, supporting 5.5 V-tolerant inputs, and rated for –40°C to +85°C industrial temperature range. It routes four parallel 2:1 data paths under a common address select (A/B) and active-low strobe (G), used in LED display column drivers and I/O expansion logic.

For engineers reviewing the SN74LV157APWR datasheet, SN74LV157APWR pinout, SN74LV157APWR application, or SN74LV157APWR equivalent, this page provides verified functional identity, TSSOP-16 package mapping, true-output logic behavior, ground-bounce/undershoot performance specs, and validated alternative options for multiplexer-based signal routing in space-constrained industrial designs.

Technical Context

The SN74LV157APWR implements four independent 2:1 multiplexers with shared A/B select and G strobe control, each outputting true (non-inverted) data. Its input structure accepts up to 5.5 V regardless of VCC, enabling mixed-voltage interface bridging between 3.3 V logic and 5 V peripherals.

It features low dynamic noise: typical VOLP (output ground bounce) < 0.8 V and VOHV (output undershoot) > 2 V at VCC = 5 V, TA = 25°C. Latch-up immunity exceeds 100 mA per JESD78 Class II, supporting robust operation in noisy telecom and motor drive environments.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 5.0 mm × 4.4 mm body, 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NIPDAU/SN finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2:1 multiplexer applications.

Compared with SN74LV157APWR, SN74LVC157APWR trades voltage flexibility for speed in low-VCC domains, while 74AHC157PW,118 offers pin compatibility at the expense of input tolerance and static current - making SN74LV157APWR optimal for industrial 2–5.5 V mixed-signal routing where reliability and interface headroom are critical.

Availability

SN74LV157APWR is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expanders, and network switch control logic requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSSOP packaging.

Supply support for SN74LV157APWR 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 decades of expertise in industrial-grade interface ICs and broad portfolio scalability.

The SN74LV157A series belongs to TI's LV logic family, designed specifically for low-voltage, high-noise-immunity data routing in industrial automation, telecom infrastructure, and motor control systems.

FAQ

What is the maximum propagation delay of the SN74LV157APWR at 5 V?

The SN74LV157APWR has a maximum propagation delay (tpd) of 7.5 ns at VCC = 5 V ± 0.5 V, CL = 15 pF, and TA = 25°C. This value is specified in Section 6.8 of the official TI datasheet (SCLS397G) and reflects worst-case timing for A/B→Y and G→Y paths under standard load conditions. The SN74LV157APWR maintains consistent performance across its full industrial temperature range.

Does the SN74LV157APWR support 5 V input signals when powered at 3.3 V?

Yes, the SN74LV157APWR supports input voltages up to 5.5 V regardless of VCC level - including when VCC = 3.3 V. This 5.5 V-tolerant input capability is explicitly stated in the Features section and Section 6.1 (Absolute Maximum Ratings) of the datasheet, enabling seamless interfacing with 5 V peripherals without external level shifters. The SN74LV157APWR leverages TI's LV process to decouple input voltage limits from supply rails.

What is the function of Pin 15 (G) on the SN74LV157APWR?

Pin 15 (G) is the active-low output strobe (enable) input. When G is high, all four Y outputs (1Y–4Y) enter high-impedance (Hi-Z) state, effectively disconnecting them from downstream circuitry. When G is low, the multiplexer operates normally, routing selected inputs to outputs based on the A/B state. This feature allows bus sharing and prevents contention in multi-device systems. The SN74LV157APWR uses this pin for synchronized data gating in applications like LED display scanning.

Is the SN74LV157APWR pin-compatible with other TSSOP-16 logic multiplexers?

The SN74LV157APWR is pin-compatible with SN74LVC157APWR and 74AHC157PW,118 in the TSSOP-16 (PW) package, sharing identical pin assignments for VCC, GND, A/B, G, and all data I/Os. However, electrical differences - such as input voltage tolerance, drive strength, and quiescent current - require validation in target circuits. The SN74LV157APWR's 5.5 V-tolerant inputs and industrial temp rating distinguish it in mixed-voltage deployments.

What thermal metrics apply to the SN74LV157APWR in TSSOP-16 package?

The SN74LV157APWR in PW (TSSOP-16) package has a junction-to-ambient thermal resistance (RθJA) of 108°C/W, as specified in Section 6.4 of the datasheet. This value assumes standard JEDEC High-K test board conditions. For sustained operation near maximum ratings, thermal design must account for ambient temperature, airflow, and PCB copper area - especially when driving loads near ±12 mA. The SN74LV157APWR's low power dissipation capacitance (13.1 pF at 5 V) further minimizes self-heating.