STMicroelectronics M74HC151YTTR

Overview

M74HC151YTTR from STMicroelectronics is an automotive-grade 8-channel CMOS multiplexer in TSSOP16 package, providing single-bit data selection from eight inputs (D0–D7) with complementary outputs Y/W, strobe-enabled operation, and guaranteed operation from -40 °C to +125 °C. It supports universal logic generation for four-variable functions and features balanced propagation delays (tPLH ≈ tPHL), 17 ns typical propagation delay at 6 V, and 4 µA max quiescent current at 25 °C.

For engineers reviewing the M74HC151YTTR datasheet, M74HC151YTTR pinout, M74HC151YTTR application, or M74HC151YTTR equivalent, key selection criteria include automotive temperature range compliance (-40 °C to +125 °C), TSSOP16 footprint compatibility, strobe-controlled enable behavior, complementary output pairing, and AEC-Q100 qualification status per order code marking "HC151Y".

Technical Context

The M74HC151YTTR implements a 3-bit address-decoded 8:1 multiplexer using silicon gate C2MOS technology, where inputs A/B/C select one of D0–D7 to route to Y (true) and W (inverted) outputs only when STROBE is low. Its logic diagram confirms direct gating without internal latching or clocking.

Electrical behavior is defined by rail-to-rail input thresholds (VIH = 3.15 V min at VCC = 4.5 V; VIL = 1.35 V max), symmetrical drive capability (|IOH| = IOL = 4 mA min), and noise immunity ≥28% VCC - all validated across the full -40 °C to +125 °C automotive operating range.

Key Specifications

Pinout & Package

TSSOP16 (Thin Shrink Small Outline Package, 16-pin), 4.9–5.1 mm width, 6.2–6.6 mm length, 0.65 mm pitch, 1.2 mm height - optimized for high-density automotive PCB layouts with thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC151PWR and MC74HC151ADTR2G, the M74HC151YTTR uniquely delivers AEC-Q100 Grade 1 certification in TSSOP16 with explicit automotive marking ("HC151Y"), making it the only choice for production automotive modules requiring OEM-compliant qualification evidence.

Availability

M74HC151YTTR is available at Aetrix Electronics and suitable for engine control units, body control modules, infotainment systems, and ADAS camera interfaces requiring stable component supply across automotive production lifecycles.

Supply support for M74HC151YTTR 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100-aligned quality systems.

The M74HC151YTTR belongs to ST's automotive-qualified HC logic family, designed specifically for robust signal routing and logic synthesis in harsh-temperature vehicle subsystems where reliability and qualification traceability are mandatory.

FAQ

Is M74HC151YTTR pin-compatible with standard 74HC151 devices?

Yes - M74HC151YTTR uses identical TSSOP16 pinout and logic function as generic 74HC151 variants. Address pins A/B/C, data inputs D0–D7, outputs Y/W, STROBE, VCC, and GND occupy matching positions. The only physical distinction is the "HC151Y" top-side marking indicating automotive qualification.

What is the maximum clock/data rate supported by M74HC151YTTR?

The device has no internal clock; its maximum usable data rate depends on propagation delay and load. With tPD = 22 ns (max at -40 °C to +125 °C, VCC = 4.5 V), it supports clean switching up to ~20 MHz for repetitive selection patterns under 50 pF load, assuming proper PCB layout and supply decoupling.

Does M74HC151YTTR require external pull-up or pull-down resistors on address inputs?

No - all inputs have built-in protection diodes and defined VIH/VIL thresholds. However, floating address or STROBE lines risk metastability; ST recommends tying unused inputs to VCC or GND via ≤10 kΩ resistors in production designs to prevent noise-induced misselection.

Can M74HC151YTTR operate with mixed voltage domains (e.g., 3.3 V MCU controlling 5 V analog sensors)?

Yes - VCC can be set independently (2–6 V), and input thresholds scale with VCC (e.g., VIH = 3.15 V at VCC = 4.5 V). For 3.3 V MCU control, operate VCC at 3.3 V; for 5 V sensor interfacing, use VCC = 5 V and ensure MCU outputs meet VIH/VIL specs at that rail.