STMicroelectronics M74HC241B1R

Overview

M74HC241B1R from STMicroelectronics is an octal non-inverting 3-state bus buffer with dual independent enable controls (1G and 2G), designed for bidirectional data bus isolation in memory address/data routing applications. It operates across 2V–6V, delivers symmetrical 6mA output drive, exhibits 10ns typical propagation delay at 6V, and features high noise immunity (28% VCC) and low quiescent current (4µA max at 25°C).

For engineers reviewing the M74HC241B1R datasheet, M74HC241B1R pinout, M74HC241B1R application, or M74HC241B1R equivalent, key selection criteria include 3-state timing symmetry (tPLH ≅ tPHL), dual-gated 4-bit channel grouping, DIP-20 mechanical compatibility, and guaranteed operation over –55°C to +125°C.

Technical Context

The M74HC241B1R implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low output enable input (1G and 2G). All eight outputs enter high-impedance state when their respective enable is high, enabling clean bus sharing without contention.

It uses silicon gate C2MOS technology to achieve rail-to-rail CMOS logic thresholds (VIH = 3.15V min at VCC = 4.5V; VIL = 1.35V max), balanced rise/fall times (tr/tf ≤ 400ns at 6V), and robust ESD protection on all inputs. Propagation delays are tightly matched between rising and falling edges (tPLH/tPHL ≤ 23ns max at 4.5V, CL = 50pF).

Key Specifications

Pinout & Package

Package: Plastic DIP-20 (0.300" wide), 2.54mm pitch, through-hole mounting. Compliant with JEDEC MS-001.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal non-inverting 3-state buffer applications.

Compared with SN74HC241N and 74VHC241N, M74HC241B1R uniquely combines full military-grade temperature range (–55°C to +125°C), 6V operation, and sub-10ns propagation delay - making it optimal for high-reliability automotive and aerospace bus interface designs.

Availability

M74HC241B1R is available at Aetrix Electronics and suitable for memory address buffering, industrial bus isolation, legacy system interface adaptation, and test equipment signal routing requiring stable component supply across extended temperature and voltage ranges.

Supply support for M74HC241B1R 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 analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

M74HC241B1R belongs to the high-speed CMOS (74HC) logic family, engineered for low-power, high-noise-immunity digital interfacing in resource-constrained and thermally demanding environments.

FAQ

What is the maximum output current per pin for M74HC241B1R?

The M74HC241B1R guarantees ±6mA output drive (IOL/IOH) under DC conditions at VCC = 4.5V and 6V, with absolute maximum ratings allowing ±35mA short-term current. Continuous operation above ±6mA may exceed VOL/VOH specifications and is not recommended for reliable logic-level maintenance.

Does M74HC241B1R support 3.3V logic interfacing?

Yes - M74HC241B1R operates from 2V to 6V and meets CMOS input thresholds at 3.3V (VIH = 2.31V min, VIL = 1.09V max), making it fully compatible with 3.3V microcontrollers and FPGAs without level shifters, provided VCC is set to 3.3V ±10%.

Can both 1G and 2G be tied together for single-enable operation?

Yes - tying 1G and 2G together creates a unified 8-bit 3-state buffer. This configuration is electrically valid and commonly used; however, it forfeits independent control of the two 4-bit sections, eliminating flexibility for partial bus gating or interleaved access patterns.

Is M74HC241B1R RoHS compliant and lead-free?

Yes - M74HC241B1R (DIP-20 package) is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free, with matte tin lead finish. The device carries the "E" suffix in ST's internal marking and conforms to JEDEC J-STD-609A Class 1 moisture sensitivity.