Texas Instruments SN74LV157ANS

Overview

SN74LV157ANS from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer operating from 2 V to 5.5 V, with 7.5 ns max propagation delay at 5 V, 16-pin SOP (NS) package, and true-data output logic. It routes 4-bit words from one of two input sources to four outputs under address-select and active-low strobe control, used in LED displays and network switches.

For engineers reviewing the SN74LV157ANS datasheet, SN74LV157ANS pinout, SN74LV157ANS application, or SN74LV157ANS equivalent, this page delivers verified electrical specs, functional mode behavior, real-world use cases, and validated alternative parts for multiplexer-based signal routing in industrial and telecom systems.

Technical Context

The SN74LV157ANS implements positive-logic quadruple 2:1 multiplexing with independent channel enable via active-low G input and shared A/B select line. Each of the four channels accepts 5.5 V-tolerant inputs while operating on a single 2–5.5 V supply, supporting mixed-voltage interfacing without level shifters.

Its function table defines three operational states: high-impedance output when G is high, and selection between A or B inputs per channel when G is low and A/B is high or low. Output ground bounce (VOLP) remains below 0.8 V and VOH undershoot exceeds 2 V at 25°C, ensuring robust noise margin in dense PCB layouts.

Key Specifications

Pinout & Package

The SN74LV157ANS uses a 16-pin SOP (NS) package measuring 10.3 mm × 5.3 mm with 1.27 mm lead pitch and 2.00 mm max height, compliant with JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV157ADR and 74LVC157PW, the SN74LV157ANS delivers identical logic functionality and timing in a space-optimized SOP-16 package with guaranteed 5.5 V input tolerance-making it the optimal choice for industrial 3.3 V systems requiring layout efficiency and robust interfacing.

Availability

SN74LV157ANS is available at Aetrix Electronics and suitable for LED displays, network switches, and telecom infrastructure requiring stable component supply across extended product lifecycles.

Supply support for SN74LV157ANS 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 delivering analog and embedded processing solutions with emphasis on reliability, longevity, and industrial-grade qualification.

The SN74LV157ANS belongs to TI's LV-A logic family, engineered for wide-supply interoperability and noise-resilient operation in real-time control and signal-routing applications.

FAQ

What is the maximum propagation delay of the SN74LV157ANS and under what conditions is it specified?

The SN74LV157ANS has a maximum propagation delay (tpd) of 7.5 ns, measured at VCC = 5 V ± 0.5 V, CL = 15 pF, and TA = 25°C. This value applies to transitions from A/B or G inputs to Y outputs and reflects worst-case timing for design margining in synchronous logic paths.

Does the SN74LV157ANS support mixed-voltage operation, and how does its input tolerance work?

Yes, the SN74LV157ANS supports mixed-voltage operation: its inputs tolerate up to 5.5 V regardless of VCC setting (2–5.5 V). This allows direct connection to 5 V microcontrollers or FPGAs while powering the SN74LV157ANS from 3.3 V, eliminating external level shifters in interface circuits.

How does the active-low strobe (G) pin function in the SN74LV157ANS?

The G pin is an active-low output enable: when high, all four Y outputs enter high-impedance state; when low, outputs reflect the selected A or B inputs per the A/B control line. This enables bus sharing and prevents contention in multi-driver systems without requiring external tri-state logic.

What package type and dimensions does the SN74LV157ANS use, and is it RoHS-compliant?

The SN74LV157ANS uses a 16-pin SOP (NS) package measuring 10.3 mm × 5.3 mm with 1.27 mm lead pitch and 2.00 mm max height. It is RoHS-compliant (lead finish: NiPdAu), MSL Level-1, and rated for –40°C to +85°C operation per its orderable addendum.

Can the SN74LV157ANS replace older 74LS or 74HC multiplexers in existing designs?

The SN74LV157ANS can replace 74LS157 and 74HC157 in most cases due to pin compatibility in SOP-16, wider VCC range (2–5.5 V vs 4.75–5.25 V or 2–6 V), and improved noise margins-but verify timing margins, as SN74LV157ANS tpd is faster than LS but slower than HC at 5 V, and input thresholds differ.