STMicroelectronics M74HC157RM13TR

Overview

M74HC157RM13TR from STMicroelectronics is a high-speed CMOS quad 2-channel multiplexer with common select and strobe inputs, operating across 2V–6V supply, delivering 10ns typical propagation delay at 6V, ±4mA output drive, and 4µA max quiescent current at 25°C - used in digital logic routing for industrial control I/O expansion and embedded data path selection.

For engineers reviewing the M74HC157RM13TR datasheet, M74HC157RM13TR pinout, M74HC157RM13TR application, or M74HC157RM13TR equivalent, key considerations include its TSSOP-16 package compatibility, strobe-gated output enable behavior, symmetrical output impedance, wide VCC range, and pin/function equivalence with standard 74-series 157 devices.

Technical Context

The device implements four independent 2:1 digital multiplexers sharing one SELECT line and one active-low STROBE input; when STROBE is high, all Y outputs are forced low regardless of SELECT or A/B inputs. Selection is fully static - no clock required - and decoding is combinatorial: SELECT = L routes A inputs to Y, SELECT = H routes B inputs to Y.

Designed using silicon gate C2MOS technology, it features integrated ESD protection on all inputs, supports rail-to-rail input/output swing (0V to VCC), and maintains balanced tPLH/tPHL delays across temperature ranges - critical for glitch-free data switching in synchronous and asynchronous logic systems.

Key Specifications

Pinout & Package

TSSOP-16 (Thin Shrink Small Outline Package), 4.9mm × 6.4mm body, 0.65mm pitch, 16-pin surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC157DR and 74LVC157PW, the M74HC157RM13TR uniquely balances 2–6V operation, TSSOP-16 compactness, and proven industrial temperature resilience - making it optimal for space-constrained, mixed-voltage embedded controllers.

Availability

M74HC157RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller data bus switching, and digital test equipment signal gating requiring stable component supply across long-lifecycle programs.

Supply support for M74HC157RM13TR 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer markets.

The M74HC157 belongs to ST's high-speed HC logic family - engineered for pin-compatible upgrades of legacy TTL designs while delivering lower power, wider voltage range, and enhanced noise immunity in industrial control and instrumentation.

FAQ

Is M74HC157RM13TR compatible with 5V TTL logic levels?

Yes - with VCC = 5V, its VIH (≥3.15V) and VIL (≤1.35V) thresholds exceed standard TTL input requirements, and its VOH/VOL meet TTL output drive specifications at ±4mA. No level-shifting circuitry is needed for direct interface with 74LS or 74F series devices.

What happens to outputs when STROBE is high?

When STROBE is high, all four Y outputs are forced low regardless of the state of SELECT or the A/B inputs. This overrides normal multiplexer operation and provides a synchronous disable function - useful for bus isolation or glitch suppression during state transitions.

Does M74HC157RM13TR require external pull-up or pull-down resistors?

No - all inputs have defined logic thresholds and internal protection diodes; no external biasing is required. However, floating inputs must be avoided: unconnected SELECT or STROBE pins may cause undefined output states due to noise coupling, so tie unused controls to VCC or GND.

Can this device operate reliably at −40°C ambient temperature?

Yes - the device is fully specified from −55°C to +125°C ambient, with validated DC and AC performance across that range. At −40°C, propagation delays increase by ≤25% versus 25°C values, and output drive remains ≥±4mA, ensuring robust operation in cold-environment industrial deployments.