STMicroelectronics M74HC151RM13TR

Overview

M74HC151RM13TR from STMicroelectronics is a high-speed CMOS 8-channel data multiplexer with complementary Y/W outputs, 3-bit address decoding (A/B/C), active-low strobe enable, and symmetrical 4mA drive capability. It operates from 2V to 6V, delivers 17ns typical propagation delay at 6V, and supports logic function generation for up to four variables in industrial control and digital instrumentation systems.

For engineers reviewing the M74HC151RM13TR datasheet, M74HC151RM13TR pinout, M74HC151RM13TR application, or M74HC151RM13TR equivalent, key selection criteria include input voltage thresholds (VIH/VIL), output drive strength at 4.5V/6V, propagation delay symmetry (tPLH ≅ tPHL), and TSSOP-16 thermal performance under -55°C to +125°C operation.

Technical Context

The M74HC151RM13TR implements an 8:1 analog/digital multiplexer using silicon gate C2MOS technology, with fully buffered address and strobe inputs. Its dual complementary outputs (Y active-high, W active-low) enable direct connection to downstream logic without inversion, and the strobe-controlled enable path ensures deterministic output disable behavior.

It features high noise immunity (28% VCC min. noise margin), balanced output impedance (|IOH| = IOL ≥ 4mA), and wide supply tolerance (2–6V). All inputs include ESD protection diodes rated for ±20mA transient current, supporting robust operation in noisy industrial environments.

Key Specifications

Pinout & Package

TSSOP-16 package: 4.9 × 6.4 mm body, 0.65 mm pitch, exposed pad not present, JEDEC MO-153 compliant. Designed for reflow soldering and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-channel multiplexer applications.

Compared with SN74HC151PWR and 74VHC151FT, the M74HC151RM13TR offers superior low-temperature operation (-55°C), tighter ICC spec, and guaranteed 125°C performance-critical for engine-control modules and downhole instrumentation where thermal margin is non-negotiable.

Availability

M74HC151RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O consolidation, digital panel meter design, programmable logic implementation, and legacy TTL-to-CMOS interface applications requiring stable component supply across extended temperature ranges.

Supply support for M74HC151RM13TR 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 automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 qualification capabilities.

The M74HC151RM13TR belongs to ST's high-reliability HC logic family, engineered for robust operation in harsh environments including factory automation, transportation systems, and energy infrastructure.

FAQ

What is the maximum clock frequency supported by M74HC151RM13TR for address switching?

The device does not operate on a clock; it is combinatorial. Maximum reliable address update rate is determined by propagation delay and setup time. With 22ns max tPHL/tPLH at 6V, stable operation supports address changes up to ~20MHz in synchronous systems, provided input rise/fall times stay ≤400ns (per datasheet spec at VCC = 6V).

Can M74HC151RM13TR be used to multiplex analog signals like sensor voltages?

Yes, within limits: it supports rail-to-rail analog signals between GND and VCC, with typical on-resistance of ~120Ω and channel-to-channel crosstalk < -50dB at 1MHz. For precision analog, verify THD and leakage (<1nA) at target temperature; not recommended for >10-bit accuracy or >100kHz bandwidth without calibration.

Is the STROBE pin internally pulled up or down?

No internal pull-up or pull-down exists on the STROBE pin. It is a standard CMOS input with ±0.1µA leakage at 25°C. External biasing is required for defined state during power-up or unused conditions; a 10kΩ pull-down resistor ensures default disable (Y=L, W=H) if undriven.

Does M74HC151RM13TR support hot insertion or live swapping?

No. The device lacks hot-swap protection circuitry. Applying VCC before GND, or connecting inputs before supply stabilization, may cause latch-up due to input diode conduction. Always follow proper power sequencing: GND first, then VCC, then inputs - and observe absolute maximum ratings for VI and VO during insertion.