STMicroelectronics M74HC4051TTR

Overview

M74HC4051TTR from STMicroelectronics is a single 8-channel analog multiplexer/demultiplexer with bidirectional switches, ±6 V analog input range, 70 Ω typical ON resistance at 4.5 V supply, and 15 ns typical propagation delay. It features logic-level translation enabling 5 V digital control of ±5 V analog signals and includes an INH inhibit pin for global switch disable - used in precision sensor signal routing and multi-channel data acquisition systems.

For engineers reviewing the M74HC4051TTR datasheet, M74HC4051TTR pinout, M74HC4051TTR application, or M74HC4051TTR equivalent, key selection criteria include its dual-supply operation (VCC–VEE = 2–12 V), low crosstalk (–50 dB), high noise immunity (28% VCC min), and TSSOP-16 package compatibility with space-constrained mixed-signal PCB layouts.

Technical Context

The M74HC4051TTR implements eight digitally controlled analog switches using silicon gate C2MOS technology, with built-in level shifting to support ±6 V peak analog signals while accepting 0–6 V digital control inputs. Its VEE pin enables true bipolar analog operation, and the INH input provides synchronous channel disable independent of A/B/C select lines.

Switching is governed by a 3-bit binary decoder (A, B, C) selecting one of eight I/O channels to connect to the common COM terminal. All I/O paths exhibit matched ON resistance (ΔRON ≤ 15 Ω at 6 V/–6 V), low feedthrough capacitance (0.95 pF typ), and <0.02% sine wave distortion at 9 V supply - critical for audio and instrumentation-grade signal integrity.

Key Specifications

Pinout & Package

TSSOP-16 package: 4.9 × 6.4 mm body, 0.65 mm pitch, thin-profile surface-mount design optimized for high-density PCBs and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with CD74HC4051M96 and ADG1408YRUZ, the M74HC4051TTR uniquely integrates logic-level translation and ±6 V analog tolerance in a TSSOP-16 package - delivering optimal balance of integration, bipolar signal support, and layout efficiency for mid-performance mixed-signal systems.

Availability

M74HC4051TTR is available at Aetrix Electronics and suitable for industrial sensor hubs, medical patient monitors, automotive battery management systems, and test & measurement equipment requiring stable component supply across extended temperature ranges (–55 °C to +125 °C).

Supply support for M74HC4051TTR 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, designing and manufacturing microcontrollers, analog ICs, power management devices, and MEMS sensors for industrial, automotive, and consumer markets.

The M74HC4051 belongs to ST's high-speed CMOS analog switch product line, engineered specifically for robust signal routing in mixed-voltage systems where logic-level translation, low distortion, and wide supply flexibility are essential.

FAQ

Can M74HC4051TTR operate with VCC = 3.3 V and VEE = –3.3 V?

Yes. The device supports VCC–VEE = 2–12 V, so 3.3 V/–3.3 V yields 6.6 V differential - well within specification. At this condition, RON is ~65 Ω typ, and analog input range extends to ±3.3 V. Ensure VI/O remains within VEE–0.5 V to VCC+0.5 V per absolute maximum ratings.

What is the maximum frequency for small-signal AC coupling through the switch?

At VCC = 6 V and VEE = –6 V, the –3 dB bandwidth is 200 MHz when measuring from common terminal to switch terminal (Table 9). For practical small-signal routing (e.g., audio or sensor tones), usable bandwidth exceeds 50 MHz with <0.1 dB flatness up to 10 MHz under 50 Ω load conditions.

Does INH pin require a pull-down resistor in normal operation?

No. The INH input has internal biasing and accepts standard CMOS logic levels. When left unconnected, it defaults to high (inhibited state) due to internal weak pull-up. For active operation, drive INH low with a microcontroller GPIO or tie directly to GND - no external resistor needed.

How does crosstalk performance change with supply voltage?

Crosstalk remains –50 dB across VCC–VEE = 4.5 V to 12 V per Table 9. This consistency arises from matched transistor geometry and guard-ring isolation in the C2MOS process - unlike older technologies where crosstalk degrades at lower supplies.