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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6314US46D3

Name: MAX6314US46D3
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6314US46D3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6314US46D3

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: TO-253-4, TO-253AA

Datasheet:: MAX6314US46D3.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT143-4

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Product details

Overview

MAX6314US46D3 from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit designed to monitor V_CC supply voltage and assert a bidirectional reset signal for µPs such as the 68HC11. It features a factory-trimmed reset threshold of 4.63V, a minimum reset timeout period of 140ms, ±1.8% threshold accuracy at +25°C, 5µA supply current, and SOT143 packaging - enabling reliable power-on/power-down/brownout reset in portable and industrial embedded systems.

For engineers reviewing the MAX6314US46D3 datasheet, MAX6314US46D3 pinout, MAX6314US46D3 application, or MAX6314US46D3 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts for µP reset supervision in battery-powered controllers and critical monitoring systems.

Technical Context

The MAX6314US46D3 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to detect V_CC falling below 4.63V ±1.8% (at +25°C) and ±2.5% over –40°C to +85°C. Its reset assertion logic includes an internal timer that guarantees RESET remains active for ≥140ms after V_CC recovers above threshold or manual reset deassertion.

RESET output combines an n-channel pulldown with a p-channel active pullup transistor paralleled by a 4.7kΩ resistor - enabling direct interface to bidirectional µP reset I/Os without external components. MR input includes a 63kΩ internal pullup and supports debounced manual reset via momentary switch to GND.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	4.63V nominal, ±1.8% accuracy at +25°C - ensures precise brownout detection for 5V-systems with tight supply margins
Reset Timeout Period	≥140ms minimum - provides sufficient hold time for full µP initialization and peripheral stabilization
Supply Current	5µA typical at +25°C - enables multi-year operation in battery-backed applications
V_CC Operating Range	1.0V to 5.5V - supports valid RESET assertion down to 1V and compatibility with wide-input µP platforms
MR Input Threshold	V_IL = 0.3×V_CC, V_IH = 0.7×V_CC - ensures robust noise immunity and TTL/CMOS logic compatibility
RESET Output Structure	Bidirectional with 4.7kΩ passive pullup + p-channel active pullup - eliminates need for external pullup and guarantees fast rise time under capacitive load
Temperature Range	–40°C to +85°C - qualified for industrial and automotive-adjacent embedded environments

Pinout & Package

SOT143 package: 4-pin, surface-mount, lead-free compatible, 1.3mm × 2.9mm footprint, -40°C to +85°C operating range.

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Supply voltage and reset threshold monitor input	Primary power rail connection; internally monitored to trigger reset when falling below 4.63V
MR	Manual reset input	Active-low input with 63kΩ internal pullup; asserts reset when pulled low, holds reset for ≥140ms after release
RESET	Active-low bidirectional reset output	Combines n-channel pulldown and p-channel active pullup + 4.7kΩ resistor - interfaces directly to 68HC11-style bidirectional reset pins
GND	Ground reference	Return path for all internal circuitry and reset comparator; must be connected to system ground plane

Key Features

Feature	Design Value
Precision factory-trimmed reset threshold	4.63V with ±1.8% accuracy at +25°C - eliminates calibration overhead and external resistor networks
Bidirectional RESET output architecture	Integrated 4.7kΩ pullup + p-channel active pullup - solves rise-time failure on multi-device reset buses without external components
Debounced manual reset input	MR requires no external RC network; internal 63kΩ pullup enables direct switch-to-GND connection
Immunity to short V_CC transients	Rejects glitches ≤100ns at 100mV overdrive - prevents spurious resets during switching noise or ESD events
Ultra-low quiescent current	5µA typical - extends battery life in portable instruments and remote sensors

Applications

Portable Medical Monitors	Industrial PLC Controllers
Use Scenario: Battery-powered ECG or glucose meter requiring guaranteed reset during cold-start and brownout. IC Role / Device Role / Timing Role: Supervisory IC asserting bidirectional RESET to ARM Cortex-M0 µP upon V_CC drop below 4.63V. Use Value: 140ms timeout ensures complete ADC initialization and display boot before firmware execution resumes.	Use Scenario: DIN-rail mounted controller exposed to 24V supply fluctuations in factory automation. IC Role / Device Role / Timing Role: Voltage supervisor triggering hardware reset on µC when 5V LDO output dips due to load transients. Use Value: ±2.5% threshold stability over temperature prevents false resets across –25°C to +70°C ambient range.
Smart Energy Meters	Automotive Diagnostic Tools
Use Scenario: Revenue-grade meter with backup supercapacitor maintaining RTC during main power loss. IC Role / Device Role / Timing Role: Reset generator holding µP in reset until V_CC stabilizes post-capacitor discharge recovery. Use Value: 5µA supply current minimizes supercap drain, extending hold-up time by >12 hours vs. higher-current alternatives.	Use Scenario: Handheld OBD-II scanner powered from vehicle 12V bus with high ripple and cold-cranking dips. IC Role / Device Role / Timing Role: Bidirectional reset supervisor interfacing to Renesas RL78 µP with shared reset line for CAN transceiver and EEPROM. Use Value: Active pullup ensures RESET rises within two E-clock cycles (<500ns @ 4MHz), enabling correct reset-source discrimination.

Portable Medical Monitors

Industrial PLC Controllers

Use Scenario: Battery-powered ECG or glucose meter requiring guaranteed reset during cold-start and brownout.

IC Role / Device Role / Timing Role: Supervisory IC asserting bidirectional RESET to ARM Cortex-M0 µP upon V_CC drop below 4.63V.

Use Value: 140ms timeout ensures complete ADC initialization and display boot before firmware execution resumes.

Use Scenario: DIN-rail mounted controller exposed to 24V supply fluctuations in factory automation.

IC Role / Device Role / Timing Role: Voltage supervisor triggering hardware reset on µC when 5V LDO output dips due to load transients.

Use Value: ±2.5% threshold stability over temperature prevents false resets across –25°C to +70°C ambient range.

Smart Energy Meters

Automotive Diagnostic Tools

Use Scenario: Revenue-grade meter with backup supercapacitor maintaining RTC during main power loss.

IC Role / Device Role / Timing Role: Reset generator holding µP in reset until V_CC stabilizes post-capacitor discharge recovery.

Use Value: 5µA supply current minimizes supercap drain, extending hold-up time by >12 hours vs. higher-current alternatives.

Use Scenario: Handheld OBD-II scanner powered from vehicle 12V bus with high ripple and cold-cranking dips.

IC Role / Device Role / Timing Role: Bidirectional reset supervisor interfacing to Renesas RL78 µP with shared reset line for CAN transceiver and EEPROM.

Use Value: Active pullup ensures RESET rises within two E-clock cycles (<500ns @ 4MHz), enabling correct reset-source discrimination.

Equivalent & Alternatives

The following parts are listed as comparable options for similar µP reset supervision applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6315US46D3-T	Open-drain RESET output (no active pullup), same 4.63V threshold and 140ms timeout	Requires external 4.7kΩ pullup; unsuitable for bidirectional µP reset I/Os like 68HC11	Select only if target µP uses open-drain reset input and board layout allows external resistor placement
TPS3808G33DBVR	Fixed 3.3V reset threshold, 200ms timeout, 1.6µA supply current, SOT-23-5 package	Lower threshold and different timeout; lacks bidirectional RESET architecture and MR debounce	Use only for 3.3V systems where bidirectional reset capability is not required and ultra-low current is prioritized

Compared with MAX6314US46D3, MAX6315US46D3 omits the active pullup and bidirectional support - limiting interoperability with legacy µPs - while TPS3808G33DBVR trades threshold flexibility and reset-bus compatibility for lower current and smaller footprint in 3.3V-only designs.

Availability

MAX6314US46D3 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, smart energy meters, and automotive diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for MAX6314US46D3 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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, communications, and computing applications, with emphasis on power management, sensing, and interface solutions.

The MAX6314 family was engineered specifically for µP reset supervision in resource-constrained embedded systems - delivering factory-trimmed accuracy, ultra-low power, and bidirectional reset compatibility without external components.

FAQ

What is the exact reset threshold voltage of the MAX6314US46D3?

The MAX6314US46D3 has a factory-trimmed nominal reset threshold of 4.63V, with ±1.8% accuracy at +25°C and ±2.5% over the full –40°C to +85°C operating temperature range. This value is laser-trimmed during manufacturing and confirmed in the Electrical Characteristics table of the official datasheet.

Does the MAX6314US46D3 support bidirectional reset communication with the 68HC11 µP?

Yes, the MAX6314US46D3 is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and similar µPs. Its RESET pin integrates both an n-channel pulldown and a p-channel active pullup in parallel with a 4.7kΩ resistor - enabling the µP to drive RESET low and the supervisor to assert reset, with proper timing for source discrimination.

What is the minimum reset timeout period specified for the MAX6314US46D3?

The MAX6314US46D3 has a minimum reset timeout period of 140ms, as indicated by the "D3" suffix in its part number. This timeout begins after V_CC rises above 4.63V or after the MR input is released, ensuring sufficient hold time for µP and peripheral initialization.

Can the MAX6314US46D3 operate with V_CC below 2.5V?

Yes, the MAX6314US46D3 operates across V_CC = 1.0V to 5.5V. While its reset function activates only when V_CC falls below 4.63V, the device continues to draw only 5µA down to 1.0V and releases RESET once V_CC exceeds the threshold - supporting brownout detection in wide-input systems.

Is an external pullup resistor required for the RESET pin of the MAX6314US46D3?

No, an external pullup resistor is not required for the MAX6314US46D3. Its RESET output includes an integrated 4.7kΩ pullup resistor and a p-channel active pullup transistor - eliminating external components while ensuring fast rise time even under 390pF capacitive load, as verified in Figure 2 and the Electrical Characteristics table.

MAX6314US46D3 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: TO-253-4, TO-253AA

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.63V

Output:: Bidirectional

Reset:: Active Low

Reset Timeout:: 140ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-4

MAX6314US46D3 FAQ

1.How can I place an order for MAX6314US46D3 through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6314US46D3 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 MAX6314US46D3 reliable?

The price and inventory of MAX6314US46D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US46D3 is usually 5 days.

3.What payment methods are accepted for MAX6314US46D3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US46D3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6314US46D3?

MAX6314US46D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6314US46D3 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 MAX6314US46D3?

For technical support, including MAX6314US46D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US46D3 requirements.

6.How does Aetrix verify that MAX6314US46D3 is sourced from the original manufacturer or authorized distributors?

All MAX6314US46D3 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 MAX6314US46D3 meets industry standards.

7.What is the process for return or replacement of MAX6314US46D3?

All MAX6314US46D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US46D3, 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 MAX6314US46D3 part is unused and in its original packaging.

Return procedure for MAX6314US46D3:

1.Submit a request within 90 days.

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

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