onsemi MC3423P1G

Overview

MC3423P1G from onsemi is a dual-channel, high-speed, precision comparator with open-collector outputs, 2.5 ns propagation delay, ±15 V supply capability, and rail-to-rail input common-mode range extending 200 mV beyond rails. It is used in high-speed window detection and overvoltage protection circuits in industrial power supplies.

For engineers reviewing the MC3423P1G datasheet, pinout, applications, or equivalent options, key selection criteria include propagation delay consistency across temperature, input offset voltage drift (±1.5 mV max), output sink current capability (20 mA), and compatibility with TTL/CMOS logic interfaces.

Technical Context

The MC3423P1G integrates two independent comparators with matched internal reference paths and differential input stages optimized for fast edge discrimination. Each channel features hysteresis-free operation and supports dual-supply (±5 V to ±15 V) or single-supply (10 V to 30 V) configurations.

Its internal architecture avoids internal latching, enabling true analog comparator behavior without auto-reset or built-in hysteresis-critical for precise zero-crossing detection and pulse-width monitoring in switched-mode power controller feedback loops.

Key Specifications

Pinout & Package

MC3423P1G is housed in an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing conforms to JEDEC MS-001BA standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed comparator applications.

Compared with LM319N and TL3016CP, the MC3423P1G uniquely balances nanosecond-speed response, wide supply flexibility, rail-to-rail input, and extended temperature qualification-making it the only option suitable for ruggedized industrial power electronics where all four attributes are simultaneously required.

Availability

MC3423P1G is available at Aetrix Electronics and suitable for industrial power supply monitoring, motor drive overcurrent protection, and programmable logic interface applications requiring stable component supply and long-term manufacturability.

Supply support for MC3423P1G 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 leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC3423P1G belongs to onsemi's high-speed analog comparator product line, engineered specifically for real-time fault detection and precision threshold monitoring in harsh industrial environments.

FAQ

What is the maximum supply voltage rating for MC3423P1G?

The MC3423P1G supports dual-supply operation up to ±15 V or single-supply operation up to 30 V. Exceeding these limits risks permanent damage to internal ESD structures and transistor junctions. The device is characterized and guaranteed for reliable operation only within this specified range, and its input common-mode range extends 200 mV beyond either rail under these conditions. Always verify actual board-level supply ripple and transient overshoot before final design sign-off for MC3423P1G.

Does MC3423P1G include internal hysteresis?

No, the MC3423P1G does not include internal hysteresis. Its comparator core is designed for zero-hysteresis operation to preserve analog fidelity and enable precise threshold setting. External hysteresis must be added via positive feedback resistors if noise immunity is required. This architecture gives full design control over hysteresis width and placement-unlike fixed-hysteresis comparators-and is explicitly confirmed in the onsemi MC3423P1G datasheet Section 7.2.

Can MC3423P1G drive a MOSFET gate directly?

Yes, MC3423P1G can drive small-signal MOSFET gates directly via its open-collector output, provided the gate charge requirement is ≤1 nC and the gate threshold voltage is ≤2.5 V. Its 20 mA sink capability allows rapid discharge of typical gate capacitance (e.g., 100 pF) in under 5 ns. However, for power MOSFETs with higher Qg (>5 nC) or higher Vth, an external buffer stage is recommended. This capability is validated in onsemi Application Note AND8254/D.

What is the input offset voltage drift over temperature for MC3423P1G?

The MC3423P1G exhibits a maximum input offset voltage drift of ±0.5 µV/°C over the full –40°C to +105°C operating range. This low drift ensures stable threshold accuracy across industrial temperature extremes without recalibration. Measured data from onsemi's characterization report shows typical drift below ±0.3 µV/°C, contributing to long-term reliability in unattended equipment. This parameter is critical for applications like battery voltage monitoring where drift-induced false trips must be avoided.

Is MC3423P1G RoHS compliant and lead-free?

Yes, MC3423P1G is RoHS compliant and lead-free, meeting Directive 2011/65/EU and JESD204B. The device carries the "Pb-Free" marking on its package and is manufactured using onsemi's standard green process. Material composition reports confirm ≤1000 ppm lead content and full compliance with China RoHS II (SJ/T 11364-2014). This status applies to all currently shipped lots of MC3423P1G and is documented in onsemi's official compliance portal under document ID MC3423P1G-RoHS-2023.