Texas Instruments 74LVC2G157DCUTE4

Overview

74LVC2G157DCUTE4 from Texas Instruments is a single 2-line to 1-line data selector multiplexer designed for 1.65-V to 5.5-V VCC operation. It features true and complementary outputs (Y and Y), a common strobe (G) input, and supports 24-mA output drive at 3.3 V. Used in embedded PC and barcode scanner signal routing where level translation and low-power switching are required.

For engineers reviewing the 74LVC2G157DCUTE4 datasheet, 74LVC2G157DCUTE4 pinout, 74LVC2G157DCUTE4 application, or 74LVC2G157DCUTE4 equivalent, key selection criteria include Ioff-enabled partial-power-down capability, 5.5-V tolerant inputs for down-translation, 6-ns max propagation delay at 3.3 V, and VSSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The 74LVC2G157DCUTE4 implements a positive-logic 2:1 multiplexer with active-low enable via the G input: when G = HIGH, both outputs are forced to fixed states (Y = LOW, Y = HIGH); when G = LOW, the A/B select line routes either A or B to Y (true) and Y (complementary). 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.

Partial-power-down operation is enabled by Ioff circuitry that disables outputs and blocks current backflow when VCC = 0, supporting live insertion and hot-swap applications. The device meets JESD 78 Class II latch-up performance (>100 mA) and exceeds 2000-V HBM ESD rating per JESD 22.

Key Specifications

Pinout & Package

VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body, 0.5-mm lead pitch, gull-wing leads, RoHS-compliant CU NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G157DBVR, the 74LVC2G157DCUTE4 provides essential complementary outputs and higher drive strength, while 74LVC2G157DCURG4 offers identical functionality with certified green packaging and standardized reel sizing - making it the optimal choice for scalable manufacturing and dual-output system designs.

Availability

74LVC2G157DCUTE4 is available at Aetrix Electronics and suitable for embedded PC, barcode scanner, and field transmitter applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 74LVC2G157DCUTE4 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 company delivering analog and embedded processing solutions, with leadership in logic, power management, and signal chain technologies.

The SN74LVC2G157 product line delivers ultra-small, low-power, high-drive logic multiplexers optimized for space-constrained, mixed-voltage digital systems in industrial, computing, and portable electronics.

FAQ

What is the function of the G (strobe) input on the 74LVC2G157DCUTE4?

The G input on the 74LVC2G157DCUTE4 is an active-LOW strobe that globally enables or disables the multiplexer. When G is HIGH, Y is forced LOW and Y is forced HIGH regardless of A, B, or A/B states - effectively isolating the outputs. When G is LOW, the device operates normally, routing the selected input to Y and its complement to Y. This behavior is defined in the function table of the official datasheet SCES207M.

Does the 74LVC2G157DCUTE4 support level translation between different supply voltages?

Yes, the 74LVC2G157DCUTE4 supports down-translation: its inputs tolerate up to 5.5 V regardless of VCC, allowing 5-V signals to be safely interfaced while VCC operates at 1.8 V, 2.5 V, or 3.3 V. However, it does not perform up-translation - output voltage swing is limited to the VCC rail. This capability is explicitly confirmed in Section 8.3 of the SCES207M datasheet.

What is the significance of Ioff in the 74LVC2G157DCUTE4 specification?

Ioff in the 74LVC2G157DCUTE4 refers to the off-state output leakage current, specified at ±10 µA maximum when VCC = 0 and inputs/outputs are biased to 5.5 V. This feature prevents damaging current backflow during partial-power-down or hot-insertion scenarios, protecting both the 74LVC2G157DCUTE4 and upstream/downstream components - a requirement for industrial backplane and modular system designs.

Can the 74LVC2G157DCUTE4 be used in analog signal switching applications?

The 74LVC2G157DCUTE4 is rated for digital logic switching only and is not characterized for analog signal integrity (e.g., on-resistance flatness, charge injection, or bandwidth). While it may pass low-frequency analog signals in non-critical paths, TI does not guarantee performance outside digital logic parameters. For dedicated analog multiplexing, TI recommends purpose-built analog switches such as the TMUX series instead of the 74LVC2G157DCUTE4.

What package type and dimensions does the 74LVC2G157DCUTE4 use?

The 74LVC2G157DCUTE4 uses the VSSOP-8 (DCU) package: 2.30 mm × 2.00 mm body size, 0.5-mm lead pitch, gull-wing leads, and a maximum height of 1.0 mm. Mechanical drawings confirm pin 1 indexing at the top-left corner with a standard quadrant-3 orientation. This information is documented in TI's packaging addendum and MPDS049B mechanical data sheet.