Texas Instruments SN74LV157ADRG4

Overview

SN74LV157ADRG4 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 featuring latch-up immunity exceeding 100 mA per JESD78 Class II - used in LED display data routing and network switch I/O path selection.

For engineers reviewing the SN74LV157ADRG4 datasheet, SN74LV157ADRG4 pinout, SN74LV157ADRG4 application, or SN74LV157ADRG4 equivalent, this page provides verified functional mode behavior, true-output logic operation, ground-bounce and undershoot characteristics, and TSSOP-16 package–specific thermal and switching performance under 2.5 V/3.3 V/5 V supply conditions.

Technical Context

The SN74LV157ADRG4 implements four independent 2:1 multiplexers with a common active-low output strobe (G) and shared address select (A/B), enabling simultaneous 4-bit word selection from dual input sources. Each channel outputs true (non-inverted) data, with no internal inversion between inputs and Y outputs.

It operates across industrial temperature range (–40°C to +85°C) and supports mixed-voltage interfacing: inputs tolerate up to 5.5 V regardless of VCC, while outputs swing rail-to-rail (0 V to VCC) with ±25 mA continuous drive capability and specified VOLP < 0.8 V and VOHV > 2 V at 25°C.

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 finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV157ADR and 74LVC157APW, the SN74LV157ADRG4 uniquely balances 5.5 V input tolerance, industrial temperature range, and compact TSSOP-16 packaging - making it optimal for space-limited, mixed-voltage telecom and industrial control applications requiring field-reliable signal routing.

Availability

SN74LV157ADRG4 is available at Aetrix Electronics and suitable for LED display control, network switch I/O expansion, and telecom infrastructure backplane applications requiring stable component supply across extended product lifecycles.

Supply support for SN74LV157ADRG4 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 and embedded processing technologies, with over 90 years of innovation in precision logic, power management, and signal chain solutions.

The SN74LV157ADRG4 belongs to TI's LV family of low-voltage, high-speed TTL-compatible logic devices, engineered for robust mixed-signal interfacing in industrial, communications, and computing equipment.

FAQ

What is the maximum propagation delay of the SN74LV157ADRG4 at 3.3 V supply?

The SN74LV157ADRG4 has a maximum propagation delay of 9.5 ns at VCC = 3.3 V ± 0.3 V with 15 pF load and TA = 25°C, as specified in Section 6.7 of the official datasheet. This value applies to signal transitions from A/B or G inputs to any Y output, ensuring predictable timing in 3.3 V system designs.

Does the SN74LV157ADRG4 support 5 V input signals when powered from 3.3 V?

Yes, the SN74LV157ADRG4 accepts input voltages up to 5.5 V regardless of VCC level - confirmed in Section 1 Features and Section 6.1 Absolute Maximum Ratings. When powered from 3.3 V, it safely interfaces with 5 V logic outputs without external level-shifting components.

What is the function of the G pin on the SN74LV157ADRG4?

The G pin (Pin 15) is an active-low output strobe that places all four Y outputs into high-impedance state when logic high. When G is low, the multiplexer operates normally - routing selected inputs (A or B per channel) to corresponding Y outputs. This enables bus-sharing in multi-device systems.

Is the SN74LV157ADRG4 pin-compatible with other TSSOP-16 logic multiplexers?

The SN74LV157ADRG4 uses standard TSSOP-16 pinout defined in TI's DB/DGV/DW/NS/PW package mapping. It shares identical pin functions with SN74LV157APWR and SN74LV157APWRG4, but is not pin-compatible with non-LV-series 74xx157 variants due to differing input threshold definitions and drive strength calibration.

What thermal resistance value applies to the SN74LV157ADRG4 in its TSSOP-16 package?

The SN74LV157ADRG4 in TSSOP-16 (PW) package has a junction-to-ambient thermal resistance (RθJA) of 108°C/W, as listed in Section 6.4 Thermal Information. This value assumes standard JEDEC high-k test board conditions and guides heatsinking requirements for continuous operation at maximum load.