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

Analog Devices Inc./Maxim Integrated MAX6314US26D4-T

Name: MAX6314US26D4-T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6314US26D4-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6314US26D4-T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

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

Datasheet:: MAX6314US26D4-T.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT143-4

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Product details

Overview

MAX6314US26D4-T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors V_CC supply voltage and asserts a bidirectional RESET signal when V_CC falls below 2.63V or upon manual reset assertion. It features a factory-trimmed 2.63V reset threshold, 1120ms minimum reset timeout period, ±2.5% threshold accuracy over temperature, and operates from -40°C to +85°C in SOT143 package. It is used in portable/battery-powered equipment for reliable power-on reset and brownout protection.

For engineers reviewing the MAX6314US26D4-T datasheet, MAX6314US26D4-T pinout, MAX6314US26D4-T application, or MAX6314US26D4-T equivalent, key selection criteria include its bidirectional RESET output compatibility with 68HC11-style µP reset I/Os, 5µA quiescent current, immunity to short V_CC transients, and absence of external component requirements for pull-up or trimming.

Technical Context

The MAX6314US26D4-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set the 2.63V reset threshold, paired with an internal timer that guarantees RESET remains asserted for ≥1120ms after V_CC recovers above threshold or MR deasserts. Its RESET output combines a 4.7kΩ passive pull-up resistor with a p-channel active pull-up transistor enabled for 2µs during low-to-high transitions - enabling fast rise times on capacitive reset buses.

This architecture supports deterministic reset source identification in bidirectional-reset µPs (e.g., 68HC11): the µP releases RESET, waits two E-clock cycles, then samples its state - high indicates self-initiated reset; low indicates external assertion. The active pull-up ensures valid logic-high detection even with multiple devices and stray capacitance up to ~400pF.

Key Specifications

Parameter	Value and Actual Design Meaning
V_TH Threshold	2.63V nominal, ±2.5% over -40°C to +85°C - ensures consistent brownout detection across industrial temperature range
Reset Timeout (t_RP)	≥1120ms minimum - guarantees sufficient hold time for full µP initialization and peripheral stabilization
Supply Current (I_CC)	5µA typical at +25°C - enables multi-year battery life in portable applications
RESET Output Type	Bidirectional with integrated 4.7kΩ pull-up + p-channel active pull-up - eliminates need for external pull-up and supports µP reset-source arbitration
MR Input	Internal 63kΩ pull-up, 0.3×V_CC logic-low threshold - allows direct switch-to-GND connection without external components
V_CC Operating Range	1.0V to 5.5V - supports operation down to near-dead-battery conditions while maintaining RESET validity
Immunity to Transients	Rejects V_CC glitches <100µs wide at 2.63V–100mV overdrive - prevents spurious resets from noise or switching spikes

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Supply voltage input and reset threshold monitor node	Internally connected to precision voltage divider; powers all circuitry and defines monitored rail
MR	Manual reset input	Active-low; asserts RESET when pulled ≤0.3×V_CC; internal 63kΩ pull-up enables NC default
RESET	Bidirectional reset output	Combines n-channel pulldown, p-channel active pull-up, and 4.7kΩ passive pull-up - interfaces directly with 68HC11-style bidirectional reset pins
GND	Ground reference	Return path for all internal current sources and comparator references; must be low-impedance

Key Features

Feature	Design Value
Factory-trimmed 2.63V threshold	Eliminates external resistor network and calibration, reducing BOM count and board space
1120ms minimum reset timeout	Ensures µP and peripherals fully initialize before code execution resumes - critical for flash programming and PLL lock
Integrated 4.7kΩ + active pull-up	Enables sub-500ns RESET rise time on 400pF bus - satisfies timing for 4MHz+ 68HC11 and similar µPs
5µA supply current	Supports >10-year battery life in always-on monitoring applications such as smart sensors and IoT endpoints
MR glitch rejection	100ns minimum pulse width requirement prevents false triggers from ESD or contact bounce

Applications

Portable Medical Sensors	Industrial PLC I/O Modules
Use Scenario: Battery-powered glucose meter with EEPROM data logging and LCD display. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET during battery voltage sag below 2.63V to prevent corrupted memory writes or display artifacts. Use Value: 5µA quiescent current extends single-CR2032 battery life beyond 3 years; 1120ms timeout ensures EEPROM write completion before µP restart.	Use Scenario: DIN-rail mounted digital input module powered from 24VDC supply with local 3.3V LDO. IC Role / Device Role / Timing Role: Monitors 3.3V rail derived from 24V; asserts RESET during brownout caused by field-wiring faults or transient load surges. Use Value: ±2.5% threshold accuracy over temperature ensures consistent trip point across -25°C to +70°C cabinet environments; bidirectional RESET supports diagnostic firmware reset initiation.
Smart Energy Meters	Automotive Body Control Modules
Use Scenario: ANSI C12.20-compliant electricity meter with real-time clock, metrology ASIC, and RF mesh radio. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V system rail; coordinates power-fail interrupt and safe shutdown sequence via MR-triggered reset. Use Value: Immunity to 100µs V_CC transients prevents false resets during relay switching events; SOT143 footprint minimizes PCB area in space-constrained meter design.	Use Scenario: 12V-powered BCM controlling door locks, lighting, and window motors with CAN communication. IC Role / Device Role / Timing Role: Monitors 5V auxiliary rail feeding microcontroller and CAN transceiver; provides synchronized reset during ignition cycling. Use Value: 2.63V threshold aligns with automotive cold-crank minimums; bidirectional RESET allows µP to initiate diagnostics reset without additional GPIO.

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Battery-powered glucose meter with EEPROM data logging and LCD display.

IC Role / Device Role / Timing Role: Supervisory IC asserting RESET during battery voltage sag below 2.63V to prevent corrupted memory writes or display artifacts.

Use Value: 5µA quiescent current extends single-CR2032 battery life beyond 3 years; 1120ms timeout ensures EEPROM write completion before µP restart.

Use Scenario: DIN-rail mounted digital input module powered from 24VDC supply with local 3.3V LDO.

IC Role / Device Role / Timing Role: Monitors 3.3V rail derived from 24V; asserts RESET during brownout caused by field-wiring faults or transient load surges.

Use Value: ±2.5% threshold accuracy over temperature ensures consistent trip point across -25°C to +70°C cabinet environments; bidirectional RESET supports diagnostic firmware reset initiation.

Smart Energy Meters

Automotive Body Control Modules

Use Scenario: ANSI C12.20-compliant electricity meter with real-time clock, metrology ASIC, and RF mesh radio.

IC Role / Device Role / Timing Role: Primary supervisor for 3.3V system rail; coordinates power-fail interrupt and safe shutdown sequence via MR-triggered reset.

Use Value: Immunity to 100µs V_CC transients prevents false resets during relay switching events; SOT143 footprint minimizes PCB area in space-constrained meter design.

Use Scenario: 12V-powered BCM controlling door locks, lighting, and window motors with CAN communication.

IC Role / Device Role / Timing Role: Monitors 5V auxiliary rail feeding microcontroller and CAN transceiver; provides synchronized reset during ignition cycling.

Use Value: 2.63V threshold aligns with automotive cold-crank minimums; bidirectional RESET allows µP to initiate diagnostics reset without additional GPIO.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6315US26D4-T	Open-drain RESET output (no internal pull-up), same 2.63V threshold and 1120ms timeout	Requires external 4.7kΩ pull-up; incompatible with bidirectional-reset µPs like 68HC11	Select only if target µP uses open-drain reset input and board layout already includes pull-up resistor
TPS3808G125DBVR	2.63V threshold, 1200ms timeout, 1.6µA I_CC, but push-pull RESET (not bidirectional)	Lacks p-channel active pull-up; cannot support µP-initiated reset arbitration per 68HC11 protocol	Prefer for ultra-low-power systems where bidirectional functionality is unnecessary and push-pull drive is acceptable

Compared with MAX6314US26D4-T, MAX6315US26D4-T requires external pull-up and loses bidirectional capability, while TPS3808G125DBVR offers lower current but sacrifices reset-source discrimination - making MAX6314US26D4-T uniquely suited for legacy 68HC11-based designs requiring deterministic reset cause identification.

Availability

MAX6314US26D4-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for MAX6314US26D4-T 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, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.

The MAX6314 family delivers highly accurate, low-power µP supervisory functions with factory-trimmed thresholds and programmable timeouts - engineered specifically for robust reset generation in battery-powered and noise-prone embedded systems.

FAQ

What is the exact reset threshold voltage of the MAX6314US26D4-T?

The MAX6314US26D4-T has a factory-trimmed nominal reset threshold voltage of 2.63V, with ±2.5% accuracy over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and specified in the Ordering Information table - it is not adjustable and applies exclusively to this variant (D4-T suffix denotes 1120ms timeout).

Does the MAX6314US26D4-T require an external pull-up resistor on the RESET pin?

No, the MAX6314US26D4-T does not require an external pull-up resistor. It integrates a 4.7kΩ passive pull-up resistor in parallel with a p-channel active pull-up transistor on the RESET pin, enabling direct interface with bidirectional-reset µPs like the 68HC11 without additional components.

What is the minimum reset timeout period for the MAX6314US26D4-T?

The MAX6314US26D4-T provides a minimum reset timeout period of 1120ms, as indicated by the "D4" suffix in the part number. This duration is guaranteed under all operating conditions and ensures sufficient hold time for complex µP initialization sequences, including flash configuration and peripheral setup.

Can the MAX6314US26D4-T operate with supply voltages below 2.63V?

Yes, the MAX6314US26D4-T operates from V_CC = 1.0V to 5.5V. While it asserts RESET when V_CC falls below 2.63V, it continues functioning down to 1.0V - and RESET remains a valid logic-low output until V_CC drops below 1.0V, at which point it becomes high-impedance.

Is the MAX6314US26D4-T pin-compatible with the MAX811 series?

Yes, the MAX6314US26D4-T is explicitly stated as pin-compatible with the MAX811 in its Features list. Both devices use the SOT143 package and share identical pin assignments (V_CC, MR, RESET, GND), enabling drop-in replacement where bidirectional RESET functionality and 2.63V/1120ms timing are required.

MAX6314US26D4-T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.63V

Output:: Bidirectional

Reset:: Active Low

Reset Timeout:: 1.12s Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-143-4

MAX6314US26D4-T FAQ

1.How can I place an order for MAX6314US26D4-T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6314US26D4-T 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 MAX6314US26D4-T reliable?

The price and inventory of MAX6314US26D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US26D4-T is usually 5 days.

3.What payment methods are accepted for MAX6314US26D4-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US26D4-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6314US26D4-T?

MAX6314US26D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6314US26D4-T 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 MAX6314US26D4-T?

For technical support, including MAX6314US26D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US26D4-T requirements.

6.How does Aetrix verify that MAX6314US26D4-T is sourced from the original manufacturer or authorized distributors?

All MAX6314US26D4-T 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 MAX6314US26D4-T meets industry standards.

7.What is the process for return or replacement of MAX6314US26D4-T?

All MAX6314US26D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US26D4-T, 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 MAX6314US26D4-T part is unused and in its original packaging.

Return procedure for MAX6314US26D4-T:

1.Submit a request within 90 days.

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

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