STMicroelectronics 74LVX157MTR

Overview

74LVX157MTR from STMicroelectronics is a low-voltage CMOS quad 2-channel multiplexer with 5V-tolerant inputs, operating from 2V to 3.6V supply. It features 5.1 ns typical propagation delay at 3.3V, ±4 mA symmetrical output drive, 2 µA max quiescent current, and power-down input protection enabling safe 0–7V input acceptance regardless of VCC. It is used in voltage-level translation between 5V and 3.3V logic domains in portable and low-noise embedded systems.

For engineers reviewing the 74LVX157MTR datasheet, 74LVX157MTR pinout, 74LVX157MTR application, or 74LVX157MTR equivalent, key selection criteria include 5V-tolerant input compatibility, balanced tPLH/tPHL delays, low-noise VOLP (0.3V typ), 2–3.6V operating range, and SOP-16 package mechanical fit for space-constrained PCB layouts.

Technical Context

The 74LVX157MTR implements four independent 2:1 digital multiplexers sharing common SELECT and STROBE control lines. Its sub-micron C2MOS process enables true CMOS low power with high-speed performance, while input protection circuitry allows 0–7V input voltage swing independent of VCC - critical for mixed-voltage interface applications.

Propagation delays are tightly matched (tPLH ≅ tPHL) across all channels, and output skew is limited to 1.5 ns max (CL = 50 pF), supporting synchronous data routing in timing-sensitive logic paths. The device guarantees truth table operation from 1.2V to 3.6V, with data retention down to 1.2V.

Key Specifications

Pinout & Package

SOP-16 (Small Outline Package, 150 mil width), JEDEC MS-012AC compliant, with 1.27 mm pitch and gull-wing leads. RoHS-compliant, Pb-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC157PW and SN74LV4052ADR, the 74LVX157MTR uniquely combines 5V-tolerant digital inputs, dedicated STROBE control, and ultra-low ICC - making it optimal for cost-sensitive, mixed-voltage digital signal routing where power and interface simplicity are prioritized over analog support or sub-1.8V operation.

Availability

74LVX157MTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, portable medical sensor hubs, and automotive body control modules requiring stable component supply and long-term lifecycle assurance.

Supply support for 74LVX157MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog ICs, and automotive-grade components.

The 74LVX series targets low-voltage, low-power digital logic applications in battery-operated and mixed-voltage systems, emphasizing interoperability between legacy 5V and modern 3.3V/2.5V logic families.

FAQ

Is the 74LVX157MTR pin-compatible with standard 74HC157 or 74LS157?

Yes - it is pin- and function-compatible with the 74-series 157 family, including identical pin numbering and truth table behavior. However, its 2–3.6V V_CC range and 5V-tolerant inputs differ electrically from 74HC157 (2–6V) and 74LS157 (4.75–5.25V), requiring appropriate supply and interface design.

What is the maximum input voltage the 74LVX157MTR can safely withstand on any pin?

The absolute maximum input voltage is −0.5 V to +7.0 V per pin, independent of V_CC. This rating is enabled by internal protection circuitry and applies to all inputs (SELECT, STROBE, A/B channels) - verified per STMicroelectronics' Absolute Maximum Ratings table.

Does the 74LVX157MTR support hot insertion or partial power-down scenarios?

Yes - its power-down protection on all inputs prevents latch-up when V_CC is unpowered or floating, allowing safe hot insertion into live 5V buses. This is confirmed by ST's specification of "0 to 7V acceptable on inputs with no regard to supply voltage" in the product description.

Can the STROBE pin be left unconnected in normal operation?

No - STROBE must be actively driven LOW to enable multiplexer operation. If left floating, its internal pull-down is insufficient to guarantee logic LOW state; undefined output behavior may occur. A 10-kΩ pull-down resistor to GND is recommended if not actively controlled.