onsemi 74VHC08M

Overview

74VHC08M from onsemi is a quad 2-input AND gate IC in SOIC-14 package, operating from 2.0 V to 5.5 V supply, delivering 4.3 ns typical propagation delay at 5.0 V, 15 pF load, with ±25 mA output drive and input protection up to 5.5 V - used for logic-level translation and combinational control in industrial microcontroller I/O expansion.

For engineers reviewing the 74VHC08M datasheet, pinout, applications, or equivalent options, this page provides verified functional specs, SOIC-14 terminal mapping, noise immunity metrics (VNIH/VNIL ≥ 28% VCC), power-down input protection, and direct alternatives for 74VHC08M-based designs requiring CMOS-compatible AND logic with 3 V/5 V interface capability.

Technical Context

The 74VHC08M implements four independent 2-input AND gates using silicon-gate CMOS technology, achieving TTL-compatible speed while maintaining CMOS low static current (ICC ≤ 2.0 µA at 5.5 V). Its buffer-output stage ensures high noise immunity and stable rail-to-rail switching.

All inputs feature power-down protection and tolerate 0 V to 5.5 V regardless of VCC, enabling safe interfacing between 3 V and 5 V systems and battery-backup dual-supply configurations without external clamping.

Key Specifications

Pinout & Package

74VHC08M is supplied in SOIC-14 (Case 751A) package, 8.75 mm × 4.00 mm body, 1.27 mm pitch, surface-mount, Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input AND gate applications.

Compared with 74VHC08M, 74HC08D offers lower cost at reduced speed and higher quiescent current, while SN74LVC08APWR delivers faster 3.3 V operation but mandates TSSOP layout changes - making 74VHC08M optimal for legacy SOIC-based 5 V/3.3 V interface upgrades requiring minimal board rework.

Availability

74VHC08M is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller GPIO logic gating, and 3.3 V/5 V system interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 74VHC08M 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

onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 74VHC08M belongs to the VHC (Very High Speed CMOS) logic family, designed specifically for high-speed, low-power digital interface and glue logic in mixed-voltage embedded systems.

FAQ

What is the maximum supply voltage rating for the 74VHC08M?

The 74VHC08M has a maximum DC supply voltage (VCC) rating of +6.5 V, per its Absolute Maximum Ratings table. However, the recommended operating range is 2.0 V to 5.5 V. Operation above 5.5 V may compromise reliability and is not guaranteed for functionality or lifetime - always adhere to the 5.5 V upper limit in production designs using 74VHC08M.

Does the 74VHC08M support mixed-voltage interfacing between 3.3 V and 5 V systems?

Yes, the 74VHC08M supports mixed-voltage interfacing: its inputs tolerate 0 V to 5.5 V regardless of VCC, and it operates correctly with VCC = 3.3 V or 5.0 V. This allows direct connection of 5 V signals to inputs while powering the 74VHC08M from 3.3 V, making it ideal for bidirectional level translation in systems containing both voltage domains - a key capability confirmed in the device's General Description and DC Electrical Characteristics for 74VHC08M.

What is the typical propagation delay of the 74VHC08M at 3.3 V supply?

The 74VHC08M exhibits a typical propagation delay (tPD) of 6.2 ns at VCC = 3.3 V ±0.3 V with CL = 15 pF, as specified in the AC Electrical Characteristics table. This value is measured under standard test conditions and reflects real-world performance in 3.3 V logic systems - confirming that 74VHC08M maintains high-speed operation even below 5 V, unlike older HC-family variants.

Are unused inputs on the 74VHC08M required to be terminated, and if so, how?

Yes, unused inputs on the 74VHC08M must be terminated - they may not float. Per the Recommended Operating Conditions note, all unused inputs must be held HIGH (tied to VCC) or LOW (tied to GND) to prevent increased ICC, oscillation, or undefined output states. This requirement applies to every gate in the 74VHC08M quad package and is essential for stable operation across the full −40°C to +85°C temperature range.

Is the 74VHC08M pin-compatible with the 74HC08 family?

Yes, the 74VHC08M is pin- and function-compatible with the 74HC08 family, as explicitly stated in the Features section of the datasheet. Both share identical SOIC-14 pinout, truth table, and logic function. However, the 74VHC08M offers significantly faster propagation delay (4.3 ns vs. ~15 ns), lower ICC, and enhanced input voltage tolerance - making it a direct performance upgrade for existing 74HC08M designs without PCB changes.