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

Analog Devices Inc./Maxim Integrated MAX6707TKA-T

Name: MAX6707TKA-T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6707TKA-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX6707TKA-T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SOT-23-8

Datasheet:: MAX6707TKA-T.pdf

Description:: IC SUPERVISOR MPU

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Product details

Overview

MAX6707TKA-T from Maxim Integrated is a single-supply microprocessor supervisory IC in an 8-pin SOT23 package, providing active-low open-drain reset output, independent watchdog timer with 1.6s timeout, adjustable power-fail comparator (0.62V threshold), and manual reset input. It monitors +3.3V/+2.5V systems in industrial controllers and telecom infrastructure where brownout resilience and guaranteed reset validity down to V_CC = 1V are critical.

For engineers reviewing the MAX6707TKA-T datasheet, MAX6707TKA-T pinout, MAX6707TKA-T application, or MAX6707TKA-T equivalent, this page delivers verified functional identity, confirmed pin roles, exact reset timeout (140ms), watchdog behavior (latched WDO on timeout, deasserted by MR low or WDI edge), and real-world substitution guidance for µP power monitoring designs.

Technical Context

The MAX6707TKA-T implements a dual-comparator architecture: one fixed-threshold monitor for V_CC (3.08V nominal, suffix 'T'), and one externally adjustable 0.62V-referenced comparator for power-fail detection (PFI/PFO). Its watchdog circuit asserts WDO low upon 1.6s WDI inactivity and remains latched until cleared by MR low or WDI edge - distinct from non-A versions that require WDI transition only.

Reset generation uses an internal 140ms timeout timer triggered by V_CC falling below threshold, MR assertion, or (in A-version) undervoltage on monitored supplies. The open-drain RESET and WDO outputs support flexible pull-up configurations, while PFO provides active-low power-fail warning synchronized to PFI voltage crossing 0.62V ±9mV hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	3.08V (typ) at -40°C to +85°C; ensures reliable reset assertion during +3.3V supply brownout
Reset Timeout Period	140ms (min) – guarantees µP reset pulse width sufficient for full initialization sequence
Watchdog Timeout	1.6s (typ) – provides robust firmware activity monitoring without false triggers from brief stalls
Power-Fail Threshold	0.62V (typ) with 6mV hysteresis – enables precise early-warning detection of secondary supply collapse
Supply Voltage Range	1.2V to 5.5V – supports operation during deep brownout and compatibility with 1.8V–5V system rails
Reset Output Type	Active-low open-drain – allows wired-OR configuration and level-shifting across voltage domains
Operating Temperature	-40°C to +125°C – qualified for under-hood automotive control modules and industrial PLCs

Pinout & Package

Package: 8-pin SOT23 (K8+2 outline), 1.6mm × 2.9mm footprint, RoHS-compliant lead-free option available as MAX6707TKA+T.

Pin/Terminal	Circuit Role	Design Meaning
1 MR	Active-low manual reset input	CMOS-compatible input with 50kΩ internal pullup; pulling low forces reset and clears latched WDO
2 V_CC	Supply voltage and primary reset monitor input	Powers internal circuitry and sets reset trigger point at 3.08V (suffix T); valid down to 1.2V
3 GND	Ground reference	Common return path for all analog comparators and digital logic; decoupling capacitor required
4 PFI	Power-fail voltage monitor input	High-impedance node referenced to 0.62V internal bandgap; connects to external resistor divider for custom trip points
5 PFO	Power-fail comparator output	Active-low open-drain output asserting when PFI < 0.62V; used for µP interrupt or backup power enable
6 WDI	Watchdog timer input	Edge-sensitive input; rising/falling transitions reset 1.6s timeout counter; 50ns minimum pulse width
7 RESET	Active-low reset output	Open-drain output asserted during V_CC brownout, MR low, or watchdog timeout; requires external pullup
8 WDO	Active-low watchdog output	Open-drain output latched low on timeout; deasserted only by MR low or valid WDI edge (A-version behavior)

Key Features

Feature	Design Value
Guaranteed reset validity to V_CC = 1V	Ensures deterministic reset state during severe brownout conditions before supply collapse
Immunity to short V_CC transients	Rejects <100ns supply glitches, preventing spurious resets in noisy power environments
Independent PFI/PFO comparator	Enables early power-fail warning on auxiliary rails (e.g., 1.2V core) without affecting main reset timing
Latched watchdog output (A-version)	WDO remains asserted after timeout until explicitly cleared, eliminating race conditions in NMI-driven recovery
140ms reset timeout with temperature stability	Remains within 120–300ms range across -40°C to +125°C, ensuring consistent µP boot timing

Applications

Industrial Controllers	Telecom Power Management
Use Scenario: Programmable logic controller (PLC) operating in factory-floor environments with fluctuating 24V DC input converted to +3.3V/1.2V rails. IC Role / Device Role / Timing Role: Supervises +3.3V I/O rail and +1.2V core rail via PFI divider; asserts RESET on brownout and WDO on firmware hang. Use Value: Prevents corrupted I/O states during voltage sags and enables autonomous watchdog recovery without host intervention.	Use Scenario: Line card in carrier-grade Ethernet switch requiring graceful shutdown before AC power loss. IC Role / Device Role / Timing Role: Monitors -48V DC backup supply via PFI divider; triggers PFO interrupt to initiate controlled data flush and power-down sequencing. Use Value: Provides 100µs response to backup supply decay, enabling full packet buffering before power collapse.
White Goods Control Boards	Critical µP Power Monitoring
Use Scenario: Smart refrigerator main control board with +5V, +3.3V, and +1.8V supplies powering MCU, display, and sensor interfaces. IC Role / Device Role / Timing Role: Uses V_CC monitor for +3.3V rail and PFI for +1.8V sensor rail; generates RESET and PFO signals to isolate faulty subsystems. Use Value: Isolates sensor rail faults without resetting entire system, maintaining compressor control during transient sensor supply dips.	Use Scenario: Medical infusion pump MCU requiring fail-safe reset during battery voltage sag from 3.6V to 2.8V. IC Role / Device Role / Timing Role: Configured with 3.08V reset threshold (suffix T) to assert RESET precisely at 3.0V, allowing 100ms margin before brownout lockup. Use Value: Guarantees reset assertion at defined voltage threshold with ±30mV accuracy over temperature, meeting IEC 60601 safety requirements.

Industrial Controllers

Telecom Power Management

Use Scenario: Programmable logic controller (PLC) operating in factory-floor environments with fluctuating 24V DC input converted to +3.3V/1.2V rails.

IC Role / Device Role / Timing Role: Supervises +3.3V I/O rail and +1.2V core rail via PFI divider; asserts RESET on brownout and WDO on firmware hang.

Use Value: Prevents corrupted I/O states during voltage sags and enables autonomous watchdog recovery without host intervention.

Use Scenario: Line card in carrier-grade Ethernet switch requiring graceful shutdown before AC power loss.

IC Role / Device Role / Timing Role: Monitors -48V DC backup supply via PFI divider; triggers PFO interrupt to initiate controlled data flush and power-down sequencing.

Use Value: Provides 100µs response to backup supply decay, enabling full packet buffering before power collapse.

White Goods Control Boards

Critical µP Power Monitoring

Use Scenario: Smart refrigerator main control board with +5V, +3.3V, and +1.8V supplies powering MCU, display, and sensor interfaces.

IC Role / Device Role / Timing Role: Uses V_CC monitor for +3.3V rail and PFI for +1.8V sensor rail; generates RESET and PFO signals to isolate faulty subsystems.

Use Value: Isolates sensor rail faults without resetting entire system, maintaining compressor control during transient sensor supply dips.

Use Scenario: Medical infusion pump MCU requiring fail-safe reset during battery voltage sag from 3.6V to 2.8V.

IC Role / Device Role / Timing Role: Configured with 3.08V reset threshold (suffix T) to assert RESET precisely at 3.0V, allowing 100ms margin before brownout lockup.

Use Value: Guarantees reset assertion at defined voltage threshold with ±30mV accuracy over temperature, meeting IEC 60601 safety requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6707TKA+T	Identical functionality and pinout; lead-free packaging replaces Pb-based -T suffix	Required for RoHS-compliant manufacturing; same thermal and electrical performance	Select when lead-free compliance is mandated by end-equipment regulations
MAX6705TKA-T	Same 3.08V threshold, 140ms timeout, and A-version watchdog, but push-pull RESET instead of open-drain	Suitable where active-drive reset is needed without external pullup; incompatible with wired-OR bus topologies	Choose when driving reset directly into CMOS inputs without shared bus constraints

Compared with MAX6707TKA-T, MAX6707TKA+T offers identical supervision with environmental compliance, while MAX6705TKA-T trades open-drain flexibility for stronger push-pull drive-critical when interfacing with high-capacitance reset lines or avoiding external components.

Availability

MAX6707TKA-T is available at Aetrix Electronics and suitable for industrial controllers, telecom power management, white goods control boards, and critical µP power monitoring requiring stable component supply across extended temperature ranges.

Supply support for MAX6707TKA-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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX6701–MAX6708 family targets cost-sensitive, space-constrained µP systems needing integrated reset, watchdog, and power-fail monitoring in a single 8-pin SOT23 device.

FAQ

What is the exact reset threshold voltage for MAX6707TKA-T?

The MAX6707TKA-T has a nominal reset threshold of 3.08V at -40°C to +85°C, with guaranteed limits of 3.00V (min) and 3.15V (max) across that temperature range. At -40°C to +125°C, the range widens to 2.97V to 3.17V. This 3.08V threshold is set by the 'T' suffix and is optimized for reliable supervision of +3.3V supply rails during brownout conditions.

How does the watchdog behavior of MAX6707TKA-T differ from non-A versions?

The MAX6707TKA-T (A-version) asserts WDO low when V_CC, RST_IN1, or RST_IN2 falls below threshold and deasserts WDO immediately when the undervoltage condition ends-without timeout delay. In contrast, non-A versions latch WDO low only on watchdog timeout and require a WDI edge to clear. The A-version also allows WDO deassertion by pulling MR low, enabling hardware-controlled watchdog reset.

Can MAX6707TKA-T monitor voltages other than V_CC?

Yes, the MAX6707TKA-T includes a dedicated PFI input referenced to an internal 0.62V bandgap. By connecting an external resistor divider from a secondary supply (e.g., +1.2V core rail) to PFI, the device detects when that supply drops below the calculated trip point. The corresponding PFO output then asserts to signal power-fail, enabling preemptive system actions before main supply collapse.

What is the function of the open-drain RESET output on MAX6707TKA-T?

The open-drain RESET output on MAX6707TKA-T requires an external pullup resistor to the target voltage domain (e.g., +3.3V). This configuration allows multiple devices to share a common reset bus (wired-OR), supports level translation between different logic families, and prevents contention when multiple supervisors drive the same reset line. It also enables pullup to a higher voltage than V_CC, useful in mixed-voltage systems.

Is MAX6707TKA-T compatible with 1.8V supply rails?

Yes, the MAX6707TKA-T operates with V_CC as low as 1.2V and guarantees reset validity down to 1.0V, making it suitable for monitoring 1.8V rails. However, its 3.08V reset threshold is fixed and intended for +3.3V systems. To supervise 1.8V, use the PFI input with a resistor divider to scale the 1.8V rail down to 0.62V, triggering PFO for auxiliary monitoring while using V_CC for main supply supervision.

MAX6707TKA-T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: SOT-23-8

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Type:: Power Supply Monitor

Number of Voltages Monitored:: 2

Voltage - Threshold:: 3.08V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 120ms Minimum

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-8

MAX6707TKA-T FAQ

1.How can I place an order for MAX6707TKA-T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6707TKA-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 MAX6707TKA-T reliable?

The price and inventory of MAX6707TKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707TKA-T is usually 5 days.

3.What payment methods are accepted for MAX6707TKA-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707TKA-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6707TKA-T?

MAX6707TKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6707TKA-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 MAX6707TKA-T?

For technical support, including MAX6707TKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707TKA-T requirements.

6.How does Aetrix verify that MAX6707TKA-T is sourced from the original manufacturer or authorized distributors?

All MAX6707TKA-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 MAX6707TKA-T meets industry standards.

7.What is the process for return or replacement of MAX6707TKA-T?

All MAX6707TKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707TKA-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 MAX6707TKA-T part is unused and in its original packaging.

Return procedure for MAX6707TKA-T:

1.Submit a request within 90 days.

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

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