Texas Instruments SN74LV157ADR

Overview

SN74LV157ADR from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer IC 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 latch-up immunity >100 mA per JESD78 Class II - used in LED display data routing and network switch I/O selection.

For engineers reviewing the SN74LV157ADR datasheet, SN74LV157ADR pinout, SN74LV157ADR application, or SN74LV157ADR equivalent, key selection criteria include supply voltage range (2–5.5 V), input voltage tolerance (up to 5.5 V), propagation delay (7.5 ns @ 5 V), output drive capability (±12 mA @ 4.5–5.5 V), and SOIC-16 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The SN74LV157ADR implements four independent 2:1 multiplexers with a common active-low strobe (G) and shared address select (A/B) control line. Each channel routes either input A or B to its corresponding Y output based on A/B state, while G enables or disables all outputs simultaneously into high-impedance state.

It uses LV-CMOS logic architecture with TTL-compatible input thresholds, supports mixed-voltage interfacing due to 5.5 V-tolerant inputs, and features low ground bounce (VOLP < 0.8 V) and undershoot (VOHV > 2 V) for stable signal integrity in dense PCB layouts.

Key Specifications

Pinout & Package

SN74LV157ADR is packaged in a 16-pin SOIC (D) body measuring 10.3 mm × 7.5 mm with 1.27 mm lead pitch and 2.00 mm max height. The package is RoHS-compliant, NIPDAU lead-finished, and MSL Level-1 rated for unlimited reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC157A and 74HC157, SN74LV157ADR uniquely balances 2–5.5 V operation, 5.5 V-tolerant inputs, and 7.5 ns speed - making it optimal for modern industrial systems requiring interoperability across voltage domains and strict signal integrity.

Availability

SN74LV157ADR is available at Aetrix Electronics and suitable for LED display control, network switch I/O expansion, and telecom infrastructure applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for SN74LV157ADR 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 high-reliability industrial and communications ICs.

The SN74LV157ADR belongs to TI's LV-CMOS logic family, engineered for low-voltage operation with robust noise immunity and mixed-signal compatibility - targeting industrial automation, networking, and display subsystems.

FAQ

What is the maximum supply voltage for SN74LV157ADR?

The SN74LV157ADR supports a maximum supply voltage of 5.5 V, with absolute maximum ratings extending to 7 V for short-duration transients. Its recommended operating range is 2 V to 5.5 V, enabling seamless integration into both 3.3 V and 5 V systems without level-shifting circuitry. This specification is confirmed in Section 6.1 (Absolute Maximum Ratings) and 6.3 (Recommended Operating Conditions) of the official TI datasheet SCLS397G.

Does SN74LV157ADR support 5 V input signals when powered from 3.3 V?

Yes, SN74LV157ADR accepts input voltages up to 5.5 V regardless of VCC level - a feature explicitly documented in the "Features" section and Section 6.1 of the datasheet. When powered from 3.3 V, inputs at 5 V remain within safe operating limits and correctly register as logic high, eliminating the need for external voltage translators in mixed-voltage interfaces.

What is the function of the G (pin 15) input on SN74LV157ADR?

The G input on SN74LV157ADR is an active-low output strobe that globally enables or disables all four Y outputs. When G = L, outputs reflect the selected A/B data; when G = H, all Y outputs enter high-impedance state. This functionality is defined in Table 5-1 (Pin Functions) and the Function Table (Table 8-1), enabling bus-sharing and dynamic output isolation in multi-device systems.

What package type is used for SN74LV157ADR?

SN74LV157ADR uses a 16-pin SOIC (D) package with dimensions 10.3 mm × 7.5 mm, 1.27 mm lead pitch, and 2.00 mm maximum height. This is verified in the Package Information table (Section 3), Mechanical Drawing NS0016A, and the Orderable Addendum, where SN74LV157ADR is explicitly listed under "SOIC (D) | 16" with tape-and-reel packaging (2500 units/reel).

How does SN74LV157ADR handle ground bounce and output undershoot?

SN74LV157ADR specifies typical VOLP (output ground bounce) < 0.8 V and VOHV (output VOH undershoot) > 2 V at VCC and TA = 25°C - values measured under defined load conditions and documented in the Features section. These parameters reflect optimized output driver design that minimizes transient noise coupling during switching, critical for maintaining signal integrity in high-density PCB layouts.