Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Texas Instruments SN74LVC257ADRG4

Name: SN74LVC257ADRG4
Brand: Texas Instruments
SKU: SN74LVC257ADRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LVC257ADRG4

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: SN74LVC257ADRG4.pdf

Description:: IC MULTIPLEXER 4 X 2:1 16SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,941

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74LVC257ADRG4 from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer with 3-state outputs, designed for 1.65V–3.6V V_CC operation. It supports mixed-voltage interfacing (inputs tolerate up to 5.5V), delivers 4.6ns max propagation delay at 3.3V, and enables bus-organized signal routing in 4-bit data paths - used in telecom infrastructure, network switches, and I/O expanders.

For engineers reviewing the SN74LVC257ADRG4 datasheet, SN74LVC257ADRG4 pinout, SN74LVC257ADRG4 application, or SN74LVC257ADRG4 equivalent, key selection criteria include 3-state output control timing, voltage translation capability across 3.3V/5V domains, thermal performance in SOIC-16 packaging, and latch-up immunity exceeding 250mA per JESD17.

Technical Context

This device implements four independent 2:1 multiplexers sharing a common active-low output-enable (OE) input and a single select line (A/B). Each channel routes either input A or B to its corresponding Y output based on A/B logic level, while OE controls high-impedance state of all outputs simultaneously.

Its CMOS design ensures balanced drive strength (±24mA at 3V), low dynamic power (15.5pF typical C_pd), and robust ESD protection (±2000V HBM). Input overvoltage tolerance and rail-to-rail output swing support interoperability between legacy 5V logic and modern 3.3V/1.8V systems without external level shifters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65V to 3.6V - enables direct integration into low-voltage embedded systems and mixed-supply boards
Input Voltage Max	5.5V - allows safe connection to 5V TTL/CMOS sources without clamping diodes or external resistors
t_pd Max	4.6ns at V_CC = 3.3V - supports >200MHz data switching in high-speed digital buses
I_OL/I_OH	±24mA at V_CC = 3V - drives standard LVTTL loads and interfaces directly with microcontroller GPIOs
ESD Rating	±2000V HBM - meets industrial-grade handling requirements without additional board-level protection
Latch-up Immunity	>250mA per JESD17 - prevents destructive current runaway during transient overvoltage events

Pinout & Package

SN74LVC257ADRG4 uses a 16-pin SOIC (D) package measuring 9.90 mm × 6.00 mm with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Thermal resistance R_θJA is 118.1°C/W, requiring minimal heatsinking in ambient-temperature applications.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 5, 6, 10, 11, 13, 14	Multiplexer inputs (1A–4A, 1B–4B)	Two independent data sources per channel; A/B select determines which source appears at Y output
4, 7, 9, 12	Multiplexer outputs (1Y–4Y)	3-state outputs - high-Z when OE = high, enabling shared bus arbitration
8	GND	Reference ground for all logic and analog functions; must be low-impedance path to system ground plane
16	V_CC	Primary power supply; requires local 0.1μF ceramic bypass capacitor placed within 3mm of pin
15	OE	Active-low output enable - ties all Y outputs to high-impedance when logic high; pull-up recommended for power-up safety
A/B (Pin 1)	Select control	Global 2:1 choice signal - low selects A inputs, high selects B inputs across all four channels

Key Features

Feature	Design Value
Voltage translation capability	5.5V-tolerant inputs allow seamless interface between 5V peripherals and 3.3V/1.8V processors without external translators
High-speed multiplexing	4.6ns max t_pd at 3.3V enables use in real-time data routing for test equipment and packet-switched networks
Bus-friendly 3-state outputs	Simultaneous OE control of all four Y outputs eliminates bus contention risk in multi-device data highways
Robust process reliability	Latch-up immunity >250mA and ±2000V HBM rating ensure stable operation in noisy industrial environments

Applications

Telecom Infrastructure	Network Switches
Use Scenario: Signal path selection in line card backplanes where multiple PHY interfaces share a common MAC controller. IC Role / Device Role / Timing Role: Quad 2:1 multiplexer routing differential clock/data pairs from redundant upstream links to primary downstream ports. Use Value: Enables hot-swappable link failover with sub-5ns switching latency and no external level-shifting components.	Use Scenario: Port aggregation logic in enterprise Ethernet switches supporting 1G/2.5G PHY diversity. IC Role / Device Role / Timing Role: Selecting between copper/fiber PHY outputs under software control while maintaining signal integrity on shared MDIO buses. Use Value: Reduces PCB layer count by consolidating four independent 2:1 selections into one SOIC-16 IC with guaranteed 3.6V-compatible timing.
I/O Expanders	Test and Measurement
Use Scenario: Adding parallel GPIO capacity to microcontrollers with limited native pin count in PLC modules. IC Role / Device Role / Timing Role: Multiplexing 8-bit sensor data streams (A/B) onto 4-bit MCU data bus under firmware-selectable A/B control. Use Value: Doubles effective I/O bandwidth using existing bus lines, eliminating need for dedicated I/O expander ICs or SPI peripherals.	Use Scenario: Automated test fixture signal routing between DUT channels and measurement instruments. IC Role / Device Role / Timing Role: High-fidelity path selection for precision analog/digital stimulus signals with minimal crosstalk and ground bounce. Use Value: Achieves <0.8V typical VOLP and >2V VOHV at 3.3V, preserving signal fidelity during fast transitions critical for jitter-sensitive measurements.

Telecom Infrastructure

Network Switches

Use Scenario: Signal path selection in line card backplanes where multiple PHY interfaces share a common MAC controller.

IC Role / Device Role / Timing Role: Quad 2:1 multiplexer routing differential clock/data pairs from redundant upstream links to primary downstream ports.

Use Value: Enables hot-swappable link failover with sub-5ns switching latency and no external level-shifting components.

Use Scenario: Port aggregation logic in enterprise Ethernet switches supporting 1G/2.5G PHY diversity.

IC Role / Device Role / Timing Role: Selecting between copper/fiber PHY outputs under software control while maintaining signal integrity on shared MDIO buses.

Use Value: Reduces PCB layer count by consolidating four independent 2:1 selections into one SOIC-16 IC with guaranteed 3.6V-compatible timing.

I/O Expanders

Test and Measurement

Use Scenario: Adding parallel GPIO capacity to microcontrollers with limited native pin count in PLC modules.

IC Role / Device Role / Timing Role: Multiplexing 8-bit sensor data streams (A/B) onto 4-bit MCU data bus under firmware-selectable A/B control.

Use Value: Doubles effective I/O bandwidth using existing bus lines, eliminating need for dedicated I/O expander ICs or SPI peripherals.

Use Scenario: Automated test fixture signal routing between DUT channels and measurement instruments.

IC Role / Device Role / Timing Role: High-fidelity path selection for precision analog/digital stimulus signals with minimal crosstalk and ground bounce.

Use Value: Achieves <0.8V typical VOLP and >2V VOHV at 3.3V, preserving signal fidelity during fast transitions critical for jitter-sensitive measurements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC157ADR	Same logic function and pinout; identical electrical specs except slightly higher t_pd (5.4ns vs 4.6ns at 3.3V)	No functional difference in bus multiplexing; marginally lower speed may affect timing-critical high-frequency designs	Preferred when cost sensitivity outweighs 0.8ns propagation advantage and legacy stock availability is prioritized
74LVC257PW	TSSOP-16 package (5.00×6.40mm); otherwise identical electrical behavior and pin mapping	Smaller footprint and better thermal performance (R_θJA = 141.8°C/W) but requires rework for SOIC-based layouts	Chosen for space-constrained PCBs where layout revision is acceptable and thermal headroom is critical

Compared with SN74LVC157ADR and 74LVC257PW, SN74LVC257ADRG4 offers optimal balance of speed, SOIC-16 compatibility, and industrial temperature range (–40°C to +85°C), making it ideal for volume production in telecom and networking hardware.

Availability

SN74LVC257ADRG4 is available at Aetrix Electronics and suitable for telecom infrastructure, network switches, and I/O expanders requiring stable component supply across extended product lifecycles.

Supply support for SN74LVC257ADRG4 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 connectivity technologies with over 90 years of innovation in industrial, automotive, and communications markets.

SN74LVC257ADRG4 belongs to the LVC logic family - engineered for low-voltage, high-speed, mixed-signal interoperability in space- and power-constrained embedded systems.

FAQ

What is the operating voltage range for SN74LVC257ADRG4?

SN74LVC257ADRG4 operates from 1.65V to 3.6V on V_CC, with inputs tolerant up to 5.5V regardless of supply voltage. This dual-voltage capability allows SN74LVC257ADRG4 to serve as a level translator between 5V legacy circuits and modern low-voltage logic, eliminating external interface components in mixed-supply designs.

How does the output-enable (OE) pin function on SN74LVC257ADRG4?

The OE pin on SN74LVC257ADRG4 is an active-low control that places all four Y outputs into high-impedance state when driven high. When OE is low, outputs follow the selected A/B input per channel. TI recommends tying OE to V_CC via a pull-up resistor during power-up to prevent bus contention, as specified in the SN74LVC257ADRG4 functional description.

What is the maximum propagation delay of SN74LVC257ADRG4 at 3.3V?

SN74LVC257ADRG4 has a maximum propagation delay (t_pd) of 4.6ns at V_CC = 3.3V, measured from A/B or data input to Y output under standard load conditions. This value is confirmed in Section 5.7 of the official SN74LVC257ADRG4 datasheet and enables reliable operation in systems with clock periods down to ~200MHz.

Does SN74LVC257ADRG4 support hot-swap or live-insertion applications?

Yes, SN74LVC257ADRG4 supports hot-swap applications due to its 5.5V-tolerant inputs, robust ESD protection (±2000V HBM), and latch-up immunity exceeding 250mA per JESD17. These features ensure SN74LVC257ADRG4 remains functional during partial-power insertion events common in modular telecom and server backplanes.

What package type and dimensions does SN74LVC257ADRG4 use?

SN74LVC257ADRG4 uses a 16-pin SOIC (D) package with body dimensions of 9.90 mm × 6.00 mm and standard 1.27 mm lead pitch. Its R_θJA is 118.1°C/W, and it complies with JEDEC MS-012AC mechanical specifications - ensuring drop-in compatibility with existing SOIC-16 footprints and automated assembly processes.

SN74LVC257ADRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVC

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Type:: Multiplexer

Circuit:: 4 x 2:1

Independent Circuits:: 1

Current - Output High, Low:: 24mA, 24mA

Voltage Supply Source:: Single Supply

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

SN74LVC257ADRG4 FAQ

1.How can I place an order for SN74LVC257ADRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVC257ADRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74LVC257ADRG4 reliable?

The price and inventory of SN74LVC257ADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC257ADRG4 is usually 5 days.

3.What payment methods are accepted for SN74LVC257ADRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC257ADRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVC257ADRG4?

SN74LVC257ADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVC257ADRG4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74LVC257ADRG4?

For technical support, including SN74LVC257ADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC257ADRG4 requirements.

6.How does Aetrix verify that SN74LVC257ADRG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVC257ADRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC257ADRG4 meets industry standards.

7.What is the process for return or replacement of SN74LVC257ADRG4?

All SN74LVC257ADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC257ADRG4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74LVC257ADRG4 part is unused and in its original packaging.

Return procedure for SN74LVC257ADRG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…