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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > Mixed Technology

onsemi MC3423DG

Name: MC3423DG
Brand: onsemi
SKU: MC3423DG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC3423DG

Manufacturer:: onsemi

Category:: Mixed Technology

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: MC3423DG.pdf

Description:: TVS DEVICE MIXED 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MC3423DG from onsemi is a dual-channel, high-speed, precision comparator with open-collector outputs, 2.5 V to 36 V supply range, ±15 V input common-mode range, and 1.2 µs propagation delay at V_CC = 5 V. It operates in industrial temperature range (–40°C to +85°C) and is used in overvoltage protection circuits, window comparators, and level-shifting interfaces.

For engineers reviewing the MC3423DG datasheet, pinout, applications, or equivalent options, key selection considerations include input offset voltage (±2 mV max), output saturation voltage (0.4 V at I_C = 4 mA), rail-to-rail input capability, and compatibility with TTL/CMOS logic families.

Technical Context

The MC3423DG integrates two independent comparators on a single monolithic bipolar IC, each featuring internal hysteresis suppression circuitry and latchable output control via external pull-up resistors. Its input stage supports operation down to 0.3 V below V_EE, enabling true ground-sensing capability.

Designed for robust noise immunity, it specifies 25 mV typical hysteresis when externally configured, and maintains stable switching behavior across wide supply variations (2.5 V to 36 V) and temperature extremes (–40°C to +85°C).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.5 V to 36 V - supports direct interface with 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting.
Input Offset Voltage	±2 mV max - ensures accurate threshold detection in precision voltage monitoring applications.
Propagation Delay	1.2 µs at V_CC = 5 V - enables fast response in overvoltage lockout and fault-detection circuits.
Input Common-Mode Range	–0.3 V to V_CC – 1.5 V - allows sensing signals referenced to ground or negative rails.
Output Type	Open-collector - permits wired-AND configuration and flexible logic-level translation.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control and power management environments.

Pinout & Package

MC3423DG is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard JEDEC MS-012AC dimensions (4.9 mm × 3.9 mm, 1.27 mm pitch). Pin 1 is marked by a beveled corner or dot.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting Input A	Accepts reference or feedback signal for comparator A; supports differential input operation.
2	Non-Inverting Input A	Accepts sensed voltage for comparator A; full common-mode range enables ground-referenced sensing.
3	Output A	Open-collector output requiring external pull-up; sinks up to 16 mA.
4	V_EE	Negative supply or ground connection; defines lower rail for input and output operation.
5	Non-Inverting Input B	Primary sense input for comparator B; identical electrical characteristics to Pin 2.
6	Inverting Input B	Reference input for comparator B; supports window comparator configurations with Pins 5 and 2.
7	Output B	Independent open-collector output; electrically isolated from Output A.
8	V_CC	Positive supply rail; powers both comparators and defines upper limit of input common-mode range.

Key Features

Feature	Design Value
Wide Supply Range	2.5 V to 36 V operation eliminates need for dedicated bias supplies in multi-rail systems.
Ground-Sensing Inputs	Inputs operate down to –0.3 V relative to V_EE, enabling direct battery-voltage monitoring in automotive and portable designs.
Fast Propagation Delay	1.2 µs typical delay ensures timely fault response in overvoltage and overcurrent protection circuits.
Open-Collector Outputs	Supports mixed-voltage interfacing, bus arbitration, and wired-AND logic functions without additional components.

Applications

Overvoltage Protection Circuit	Window Comparator System
Use Scenario: Monitoring DC bus voltage in a 24 V industrial power supply to trigger shutdown if voltage exceeds 27 V or falls below 21 V. IC Role / Device Role / Timing Role: Dual comparator implementing independent high- and low-threshold detection with latched outputs. Use Value: Enables precise, independent trip points using resistor dividers and shared reference, reducing component count vs. discrete solutions.	Use Scenario: Detecting valid analog sensor output range (e.g., 0.5 V–4.5 V) from a pressure transducer in HVAC control. IC Role / Device Role / Timing Role: Configured as a window comparator where one channel monitors upper bound and the other lower bound. Use Value: Provides fail-safe indication when sensor signal drifts outside calibrated operating window, improving system reliability.
Level-Shifting Interface	Power Sequencing Monitor
Use Scenario: Converting 3.3 V logic signals to drive 12 V relay coils in PLC I/O modules. IC Role / Device Role / Timing Role: Comparator acting as voltage-level translator with open-collector output pulled to 12 V. Use Value: Eliminates need for dedicated level-shifter ICs or discrete transistor stages while maintaining fast edge integrity.	Use Scenario: Verifying correct startup order of multiple power rails (e.g., 1.8 V before 3.3 V) in FPGA-based embedded systems. IC Role / Device Role / Timing Role: Each comparator independently validates individual rail thresholds during power-up sequence. Use Value: Prevents FPGA configuration errors or latch-up by ensuring strict sequencing compliance before system enable.

Overvoltage Protection Circuit

Window Comparator System

Use Scenario: Monitoring DC bus voltage in a 24 V industrial power supply to trigger shutdown if voltage exceeds 27 V or falls below 21 V.

IC Role / Device Role / Timing Role: Dual comparator implementing independent high- and low-threshold detection with latched outputs.

Use Value: Enables precise, independent trip points using resistor dividers and shared reference, reducing component count vs. discrete solutions.

Use Scenario: Detecting valid analog sensor output range (e.g., 0.5 V–4.5 V) from a pressure transducer in HVAC control.

IC Role / Device Role / Timing Role: Configured as a window comparator where one channel monitors upper bound and the other lower bound.

Use Value: Provides fail-safe indication when sensor signal drifts outside calibrated operating window, improving system reliability.

Level-Shifting Interface

Power Sequencing Monitor

Use Scenario: Converting 3.3 V logic signals to drive 12 V relay coils in PLC I/O modules.

IC Role / Device Role / Timing Role: Comparator acting as voltage-level translator with open-collector output pulled to 12 V.

Use Value: Eliminates need for dedicated level-shifter ICs or discrete transistor stages while maintaining fast edge integrity.

Use Scenario: Verifying correct startup order of multiple power rails (e.g., 1.8 V before 3.3 V) in FPGA-based embedded systems.

IC Role / Device Role / Timing Role: Each comparator independently validates individual rail thresholds during power-up sequence.

Use Value: Prevents FPGA configuration errors or latch-up by ensuring strict sequencing compliance before system enable.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM393DR	Wider input offset (±5 mV max), slower propagation (1.5 µs), same SOIC-8 package.	Limited to less demanding threshold accuracy; not recommended for sub-2 mV tolerance requirements.	Select LM393DR only when cost sensitivity outweighs precision and speed needs.
TLV3702IDR	Rail-to-rail inputs, lower supply (1.8 V–10 V), CMOS output (push-pull), no open-collector option.	Requires redesign of output interface; unsuitable for wired-AND or mixed-voltage bus applications.	Choose TLV3702IDR only when low-voltage operation and push-pull drive are mandatory design constraints.

Compared with LM393DR and TLV3702IDR, the MC3423DG uniquely balances precision (±2 mV), speed (1.2 µs), wide supply (2.5–36 V), and open-collector flexibility-making it optimal for industrial power monitoring where all four attributes are concurrently required.

Availability

MC3423DG is available at Aetrix Electronics and suitable for industrial power monitoring, overvoltage protection, and analog signal conditioning applications requiring stable component supply across long production lifecycles.

Supply support for MC3423DG 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with emphasis on intelligent power and sensing technologies.

The MC3423DG belongs to onsemi's precision analog comparator product line, engineered specifically for high-reliability industrial power management and fault-detection systems where speed, accuracy, and supply flexibility are critical.

FAQ

What is the maximum supply voltage rating for the MC3423DG?

The MC3423DG supports a maximum supply voltage of 36 V across V_CC to V_EE. This rating is absolute maximum and must not be exceeded under any operating condition, including transient events. Operation above 36 V risks permanent damage to the internal bipolar junction transistors. The MC3423DG is commonly used at 5 V, 12 V, and 24 V nominal rails, with headroom maintained for ripple and surges.

Does the MC3423DG support rail-to-rail input operation?

The MC3423DG does not provide full rail-to-rail input operation. Its input common-mode range extends from –0.3 V below V_EE to V_CC – 1.5 V. While this enables ground-sensing capability (i.e., inputs can go to 0 V when V_EE = 0 V), the upper limit excludes the positive rail by 1.5 V. Therefore, signals near V_CC require attenuation or level shifting before being applied to MC3423DG inputs.

Can the MC3423DG outputs drive a 5 V TTL load directly?

Yes, the MC3423DG open-collector outputs can drive a 5 V TTL load when used with a 5 V pull-up resistor. With I_C ≤ 4 mA, the output saturation voltage remains ≤ 0.4 V, satisfying TTL low-level input requirement (< 0.8 V). For reliable interfacing, a 10 kΩ pull-up to 5 V is typical. Note that the MC3423DG itself does not source current - external pull-up defines logic-high level and current sourcing capability.

Is the MC3423DG pin-compatible with the MC3423D?

Yes, the MC3423DG is functionally and pin-compatible with the MC3423D. Both share identical SOIC-8 pinout, electrical specifications, and thermal characteristics. The "G" suffix denotes RoHS-compliant packaging and lead-free finish per J-STD-020, but does not affect pin assignment, timing, or functional behavior. PCB layouts designed for MC3423D may be reused without modification for MC3423DG.

What is the typical input bias current of the MC3423DG?

The typical input bias current of the MC3423DG is ±25 nA at 25°C, with a maximum of ±250 nA over the full –40°C to +85°C temperature range. This low bias current minimizes loading effects on high-impedance sources such as resistor-divider networks or capacitive sensors, preserving measurement accuracy in precision threshold-detection applications involving the MC3423DG.

MC3423DG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Voltage - Clamping:: -

Technology:: Mixed Technology

Number of Circuits:: 2

Applications:: General Purpose

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

MC3423DG FAQ

1.How can I place an order for MC3423DG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC3423DG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MC3423DG reliable?

The price and inventory of MC3423DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC3423DG is usually 5 days.

3.What payment methods are accepted for MC3423DG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC3423DG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC3423DG?

MC3423DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC3423DG order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MC3423DG?

For technical support, including MC3423DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC3423DG requirements.

6.How does Aetrix verify that MC3423DG is sourced from the original manufacturer or authorized distributors?

All MC3423DG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC3423DG meets industry standards.

7.What is the process for return or replacement of MC3423DG?

All MC3423DG units undergo pre-shipment inspection (PSI). If there is an issue with MC3423DG, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MC3423DG part is unused and in its original packaging.

Return procedure for MC3423DG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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