STMicroelectronics M74HC4075B1R

Overview

M74HC4075B1R from STMicroelectronics is a high-speed CMOS triple 3-input OR gate in 14-pin DIP package, operating from 2V to 6V supply, with typical propagation delay of 9 ns at 6V, ±4 mA output drive, and 1 µA max quiescent current at 25°C - used in digital logic control, address decoding, and bus arbitration circuits.

For engineers reviewing the M74HC4075B1R datasheet, M74HC4075B1R pinout, M74HC4075B1R application, or M74HC4075B1R equivalent, key selection criteria include VCC range (2–6 V), symmetrical tPLH/tPHL delay matching, noise immunity (28% VCC min), output drive capability (±4 mA), and DIP-14 compatibility with legacy 74-series layouts.

Technical Context

The M74HC4075B1R implements three independent 3-input OR logic functions using silicon gate C2MOS technology, with four-stage buffered output architecture that ensures stable switching and high noise immunity. Each gate features diode-clamped inputs for ESD protection and operates across industrial temperature range (−55°C to +125°C).

It maintains balanced propagation delays (tPLH ≅ tPHL) and symmetrical output impedance (|IOH| = IOL ≥ 4 mA), enabling predictable timing in combinational logic networks. Input thresholds are specified as VIH = 3.15 V and VIL = 1.35 V at VCC = 4.5 V, supporting robust TTL- and CMOS-level interfacing.

Key Specifications

Pinout & Package

Package: Plastic Dual In-line Package (DIP-14), 0.3" wide, through-hole mount, JEDEC MS-001 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple 3-input OR gate applications.

Compared with SN74HC4075N and 74VHC4075N, the M74HC4075B1R uniquely supports full −55°C to +125°C operation with guaranteed 28% VCC noise immunity - making it the preferred choice for aerospace, military, and under-hood automotive logic where environmental robustness is non-negotiable.

Availability

M74HC4075B1R is available at Aetrix Electronics and suitable for industrial control logic, automotive body electronics, legacy system upgrades, and test equipment signal routing requiring stable component supply over extended temperature ranges and long production lifecycles.

Supply support for M74HC4075B1R 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 automotive, industrial, and consumer markets.

The M74HC4075B1R belongs to the high-speed CMOS logic family, engineered specifically for reliable, low-power, pin-compatible replacements of legacy TTL logic in harsh-environment applications.

FAQ

Is M74HC4075B1R compatible with 5 V TTL logic inputs?

Yes. At VCC = 5 V, the M74HC4075B1R accepts TTL input levels: VIH = 2.0 V (min) and VIL = 0.8 V (max) per its DC specifications, ensuring reliable interfacing with 74LS and 74F series outputs without level shifters.

What is the maximum output current per Y pin under continuous DC conditions?

The absolute maximum DC output current per output pin is ±25 mA, but the guaranteed minimum drive strength is ±4 mA at VOH/VOL limits. Sustained operation above ±4 mA may violate VOL/VOH specs and is not recommended for logic integrity.

Does M74HC4075B1R require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs must be tied to VCC or GND to prevent floating states, but no external resistors are needed - internal input structure ensures stable logic levels when directly connected, avoiding shoot-through current or undefined outputs.

Can M74HC4075B1R operate from a 2.5 V supply in battery-powered devices?

Yes. It is fully specified from 2 V to 6 V, including at 2.5 V: tPD ≤ 120 ns (max), VIH = 1.75 V (min), VIL = 0.75 V (max), and ICC ≤ 20 µA (max) across −55°C to +125°C - ideal for low-voltage portable instrumentation.