Texas Instruments 74LVC2G157DCURE4

Overview

74LVC2G157DCURE4 from Texas Instruments is a single 2-line to 1-line data selector multiplexer in an 8-pin VSSOP package, designed for 1.65-V to 5.5-V operation with true/complementary outputs (Y and Y), 6 ns max propagation delay at 3.3 V, and ±24-mA output drive. It serves as a digital signal routing switch in low-voltage embedded control paths.

For engineers reviewing the 74LVC2G157DCURE4 datasheet, 74LVC2G157DCURE4 pinout, 74LVC2G157DCURE4 application, or 74LVC2G157DCURE4 equivalent, key selection criteria include Ioff-enabled partial-power-down capability, 5.5-V tolerant inputs for level translation, dual-output (inverting/non-inverting) functionality, and NanoFree™-compatible footprint compatibility across DCT/DCU/YZP packages.

Technical Context

The 74LVC2G157DCURE4 implements a positive-logic 2:1 multiplexer with active-low strobe (G) enabling: when G = HIGH, both outputs are forced to static states (Y = LOW, Y = HIGH); when G = LOW, the A/B select input routes either A or B to Y (true) and Y (complement). Its LVC-family CMOS design ensures symmetric ±24-mA drive at 3.3 V and supports mixed-voltage interfacing via 5.5-V-tolerant I/Os.

It integrates Ioff circuitry that disables outputs during power-down, preventing back-current flow when VCC = 0, and meets JESD 78 Class II latch-up immunity (>100 mA) and JESD 22 ESD ratings (2000-V HBM, 1000-V CDM). All inputs and outputs are overvoltage tolerant up to 5.5 V regardless of VCC level.

Key Specifications

Pinout & Package

74LVC2G157DCURE4 uses an 8-pin Very Thin Shrink Small-Outline Package (VSSOP, DCU), body size 2.30 mm × 2.00 mm, with gull-wing leads and exposed pad not present. Pin 1 is marked by a beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G157DBVR, 74LVC2G157DCURE4 provides dual true/complementary outputs in a space-efficient VSSOP, while 74LVC2G157DCTRE4 offers identical functionality in a larger SSOP for manual assembly or thermal margin needs - neither is pin-compatible, but all share identical logic behavior and Ioff safety features.

Availability

74LVC2G157DCURE4 is available at Aetrix Electronics and suitable for barcode scanner signal routing, e-book display interface management, and field transmitter sensor selection requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for 74LVC2G157DCURE4 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions with broad industrial and automotive qualification.

The SN74LVC2G157 series belongs to TI's LVC logic family, engineered for high-drive, low-power, mixed-voltage digital interfacing in space-constrained portable and industrial systems.

FAQ

What is the maximum propagation delay of the 74LVC2G157DCURE4 at 3.3 V?

The 74LVC2G157DCURE4 has a maximum propagation delay (tpd) of 6 ns when operated at VCC = 3.3 V, measured under standard load conditions (CL = 50 pF). This value applies to transitions at A, B, A/B, or G inputs driving either Y or Y outputs, and is specified across the full operating temperature range (–40°C to +85°C).

Does the 74LVC2G157DCURE4 support partial power-down operation?

Yes, the 74LVC2G157DCURE4 incorporates Ioff circuitry that actively disables outputs when VCC = 0 V, limiting Ioff current to ±10 µA maximum. This feature prevents damaging current backflow during live insertion, hot-swap events, or partial system power-down - a requirement confirmed in the device's Recommended Operating Conditions and Electrical Characteristics tables.

Can the 74LVC2G157DCURE4 interface 5-V signals while operating at 3.3 V VCC?

Yes, the 74LVC2G157DCURE4 accepts input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5-V controllers or sensors while powered at 3.3 V. This down-translation capability is explicitly documented in the Features and Electrical Characteristics sections, with VI(max) = 5.5 V and guaranteed operation across the full 1.65–5.5 V VCC range.

What are the true and complementary output functions of the 74LVC2G157DCURE4?

The 74LVC2G157DCURE4 provides simultaneous true (Y) and complementary (Y) outputs. When G = LOW, Y reflects the selected input (A if A/B = LOW, B if A/B = HIGH), and Y is its logical inverse. When G = HIGH, Y is forced LOW and Y is forced HIGH - a defined static state independent of A/B or data inputs.

Which package type does the 74LVC2G157DCURE4 use, and what are its dimensions?

The 74LVC2G157DCURE4 uses an 8-pin VSSOP (Very Thin Shrink Small-Outline Package) with drawing code DCU, measuring 2.30 mm × 2.00 mm nominal body size and 0.5-mm lead pitch. It is RoHS-compliant, green (no Sb/Br), with CU NIPDAU lead finish and JEDEC MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.