STMicroelectronics HCF40107BEY

Overview

HCF40107BEY from STMicroelectronics is a dual 2-input NAND buffer/driver IC with open-drain n-channel outputs, designed for high-current sinking interface applications. It delivers 136 mA typical sink current at VDD = 10 V and VDS = 1 V, supports 3–20 V supply operation, features ≤100 nA input leakage at 18 V, and meets JEDEC JESD13B B-series CMOS specifications - used in triac-driven lamp and solenoid control circuits.

For engineers reviewing the HCF40107BEY datasheet, HCF40107BEY pinout, HCF40107BEY application, or HCF40107BEY equivalent, key selection criteria include open-drain output drive strength, wide VDD range (3–20 V), guaranteed quiescent current up to 20 V, noise margin scalability with supply voltage, and DIP-8 package compatibility with legacy through-hole layouts.

Technical Context

The HCF40107BEY implements two independent 2-input NAND gates, each driving a single n-channel MOSFET output stage without internal pull-up. Its wired-OR capability enables bus interfacing and level translation when paired with external pull-up resistors.

It operates across -55°C to +125°C, supports 100% tested quiescent current (≤30 µA at 5 V, ≤600 µA at 20 V), and provides scalable noise margins: ≥1 V at 5 V, ≥2 V at 10 V, and ≥2.5 V at 15 V supply.

Key Specifications

Pinout & Package

Package: Plastic DIP-8 (dual in-line package, 0.3-inch width), compliant with mechanical data P001F.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual NAND buffer/driver applications.

Compared with CD40107BE and MC140107BD, HCF40107BEY offers superior sink current and wider supply tolerance - critical for 20 V industrial solenoid and triac interfaces where margin and reliability are non-negotiable.

Availability

HCF40107BEY is available at Aetrix Electronics and suitable for lamp driver circuits, solenoid interfaces, triac-based AC load control, and multiplexed LED displays requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF40107BEY 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 applications.

The HCF40107BEY belongs to the High-Speed CMOS B-Series logic family, engineered for robust interfacing between microcontrollers and medium-power actuators in harsh environments.

FAQ

Is an external pull-up resistor required for HCF40107BEY outputs?

Yes - the outputs are open-drain n-channel MOSFETs with no internal pull-up. An external resistor (typically 1–10 kΩ to VDD) is mandatory to establish HIGH logic level and enable wired-OR functionality. Without it, outputs remain floating or weakly pulled low via leakage paths.

Can HCF40107BEY drive a 12 V relay coil directly?

Yes - at VDD = 12 V, its typical sink current exceeds 100 mA (per channel), sufficient for most 12 V, <500 mW relay coils. Ensure the coil's rated current falls within the device's 100 mW per-output power dissipation limit and use a flyback diode across the coil.

What is the maximum safe operating frequency for HCF40107BEY in LED multiplexing?

At VDD = 15 V and CL = 50 pF, propagation delay is 30–60 ns and transition time is 10–20 ns. This supports multiplexing frequencies up to ~5 MHz in well-designed layouts - though practical limits for 7-segment displays are typically 1–2 kHz due to human persistence of vision and LED forward voltage stability.

Does HCF40107BEY support 3.3 V logic input levels?

No - its VIH minimum is 3.5 V at VDD = 5 V (scaling to 7 V at 10 V, 11 V at 15 V). Direct connection to 3.3 V microcontrollers requires a level-shifting circuit or resistor-divider network to ensure reliable HIGH recognition above the threshold.