STMicroelectronics M74HC30B1R

Overview

M74HC30B1R from STMicroelectronics is a high-speed CMOS 8-input NAND gate in a 14-pin plastic DIP package, operating from 2V to 6V supply, with typical propagation delay of 13ns at 6V, symmetrical output drive (±4mA), and high noise immunity (28% VCC). It serves as a logic combiner in industrial control sequencers requiring multi-signal arbitration.

For engineers reviewing the M74HC30B1R datasheet, M74HC30B1R pinout, M74HC30B1R application, or M74HC30B1R equivalent, key selection criteria include input count (8), supply voltage range (2–6V), output drive strength (±4mA), propagation delay symmetry (tPLH ≅ tPHL), and static discharge protection on all inputs.

Technical Context

The M74HC30B1R implements an 8-input NAND function using silicon gate C2MOS technology with five internal logic stages including buffered output, enabling stable switching and reduced sensitivity to input transients. Its input protection circuits guard against ESD and transient overvoltage, supporting robust operation in noisy industrial environments.

It operates across extended temperature (–55°C to +125°C) and wide supply (2V–6V), with rail-to-rail input and output voltage ranges (0 to VCC), and balanced AC timing where tPLH and tPHL are closely matched-critical for synchronous logic trees and clocked enable paths.

Key Specifications

Pinout & Package

Package: 14-pin plastic dual in-line package (DIP), 0.3" body width, through-hole mounting, JEDEC MS-001AC compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-input NAND gate applications.

Compared with SN74HC30N and 74VHC30N, the M74HC30B1R offers superior noise immunity and 6V tolerance-making it optimal for harsh industrial environments where supply variation and EMI are dominant concerns, despite slightly slower speed than VHC variants.

Availability

M74HC30B1R is available at Aetrix Electronics and suitable for industrial PLC input conditioning, automotive body control modules, medical infusion pump safety logic, and test equipment signal gating requiring stable component supply across extended temperature and voltage ranges.

Supply support for M74HC30B1R 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 analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The M74HC30B1R belongs to the M74HC high-speed CMOS logic family, engineered for reliable operation in industrial automation and safety-critical embedded systems where wide voltage range, noise resilience, and long-term supply stability are essential.

FAQ

Is M74HC30B1R pin-compatible with standard 74-series 30 devices?

Yes-M74HC30B1R is fully pin- and function-compatible with the legacy TTL 7430 and CMOS 74C30, sharing identical 14-pin DIP layout and 8-input NAND truth table. All input/output pins map directly, and NC pins (9,10,13) match across versions, enabling drop-in replacement without PCB modification.

What is the maximum operating temperature range for M74HC30B1R?

The M74HC30B1R is specified for operation from –55°C to +125°C, validated per STMicroelectronics' industrial-grade qualification. This extends beyond commercial-grade HC parts (–40°C to +85°C), making it suitable for under-hood automotive or factory-floor control cabinet deployments.

Can M74HC30B1R drive LED indicators directly?

Yes-its output can sink or source up to 4mA minimum at 4.5V, sufficient to drive low-current indicator LEDs (e.g., 2mA @ 1.8V VF) with a series resistor. At 6V supply, it delivers >5mA, allowing direct drive of standard 5mm LEDs with appropriate current limiting (e.g., 330Ω for ~10mA).

Does M74HC30B1R require external pull-up or pull-down resistors on unused inputs?

No-unused inputs must be tied HIGH or LOW externally, but not left floating. The device does not include internal pull resistors. Leaving inputs unconnected risks metastability, increased ICC, and EMI susceptibility due to CMOS input impedance; tie unused A–H pins to VCC or GND via ≤10kΩ resistors.