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Analog Devices Inc./Maxim Integrated MAX6707LKA+T
- Part No.:
- MAX6707LKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6707LKA+T.pdf
- Description:
- IC SUPERVISOR MPU LV SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,478
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Product details
Overview
MAX6707LKA+T from Maxim Integrated is a single-supply microprocessor supervisory IC in 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), manual reset input, and guaranteed reset validity down to VCC = 1V. It monitors +5.0V/+3.3V/+3.0V/+2.5V supplies in embedded controllers and critical µP power monitoring systems.
For engineers reviewing the MAX6707LKA+T datasheet, MAX6707LKA+T pinout, MAX6707LKA+T application, or MAX6707LKA+T equivalent, this device delivers precision brownout detection, glitch-immune manual reset, watchdog-triggered system recovery, and low-quiescent-current supervision for industrial and telecom power management circuits.
Technical Context
The MAX6707LKA+T implements a dedicated reset generator with internal 140ms timeout delay, a separate watchdog timer that asserts WDO low upon 1.6s WDI inactivity, and an independent power-fail comparator with externally adjustable trip point via PFI resistor divider. Its reset logic responds to VCC falling below 4.63V (L-suffix threshold), MR assertion, or watchdog timeout - all while maintaining valid output states down to VCC = 1V.
It features open-drain RESET and WDO outputs, push-pull PFO, CMOS-compatible MR/WDI inputs with 50kΩ internal pullup, and 0.62V reference-based PFI sensing. The A-version (denoted by 'A' in part number family) ensures WDO deasserts immediately when undervoltage clears - unlike non-A versions where WDO remains latched until WDI toggles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.63V (typ), ±3% over -40°C to +125°C - sets precise brownout detection point for +5V systems |
| Reset Timeout Period | 140ms (min), 280ms (max) - ensures µP holds reset long enough for stable power-up sequencing |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over temperature - provides reliable software activity monitoring without false triggers |
| Power-Fail Input Threshold | 0.62V (typ), 6mV hysteresis - enables accurate early-warning detection of secondary supply collapse |
| Supply Current | 12–25µA at VCC < 5.5V - supports ultra-low-power battery-backed or energy-constrained applications |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout or partial power loss |
| Output Drive Capability | RESET/WDO: 50µA sink @ 0.3V VOL; PFO: 200µA sink @ 0.3V VOL - interfaces directly with µP NMI or interrupt pins |
Pinout & Package
MAX6707LKA+T is housed in an 8-pin SOT23 package (package code K8+2), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant and lead-free (indicated by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; forces reset when pulled low; debounces pushbutton switches |
| 2 VCC | Supply voltage and primary reset monitor input | Powers internal circuitry and serves as main reset threshold reference; valid operation from 1.0V to 5.5V |
| 3 GND | Ground reference | Common return path for all analog and digital functions; must be low-impedance for noise immunity |
| 4 PFI | Power-fail voltage monitor input | High-impedance node connected to internal 0.62V comparator; accepts external resistor divider for custom trip points |
| 5 PFO | Power-fail output | Open-drain active-low output signaling PFI undervoltage; drives µP interrupt or backup controller |
| 6 WDI | Watchdog input | Edge-sensitive input; resets watchdog timer on rising/falling edge; minimum pulse width 50ns |
| 7 RESET | Active-low reset output | Open-drain output asserted low during power-up, brownout, MR activation, or watchdog timeout |
| 8 WDO | Active-low watchdog output | Open-drain output asserted low on watchdog timeout or VCC/RST_IN undervoltage; deasserts on WDI toggle or MR low (A-version) |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset state even during severe brownout or battery sag conditions |
| Immunity to short falling VCC transients | Prevents spurious resets caused by sub-100ns supply dips - critical for noisy industrial environments |
| Independent watchdog output (WDO) | Enables separate NMI handling without interfering with main reset timing or duration |
| Adjustable power-fail comparator (PFI/PFO) | Supports early warning of secondary supply failure using external resistive divider - no extra IC needed |
| 140ms reset timeout with temperature stability | Maintains consistent reset hold time across -40°C to +125°C, eliminating need for external RC timing |
| Low 12–25µA quiescent current | Minimizes standby power draw in always-on systems such as white goods and telecom line cards |
Applications
| Industrial Controllers | Telecom Power Management |
|---|---|
|
Use Scenario: Monitoring dual-rail DC-DC outputs in programmable logic controllers with isolated communication interfaces. IC Role / Device Role / Timing Role: Supervises main +5V rail and auxiliary +3.3V I/O rail; asserts RESET on either rail collapse and triggers PFO to initiate graceful shutdown via µP interrupt. Use Value: Prevents firmware corruption during partial power loss and enables controlled data save before power removal. |
Use Scenario: Ensuring reliable boot and runtime supervision of base station RF modules powered by distributed +5V and +12V supplies. IC Role / Device Role / Timing Role: Uses PFI to monitor +12V bias supply; generates PFO interrupt to halt transmission if bias drops, while RESET maintains µP in safe state. Use Value: Avoids RF amplifier damage from improper bias sequencing and eliminates uncontrolled transmit bursts during brownout. |
| Smart White Goods | Critical µP Power Monitoring |
|
Use Scenario: Supervising microcontroller and sensor subsystems in inverter-driven washing machines subject to motor-induced supply ripple. IC Role / Device Role / Timing Role: Monitors +3.3V MCU supply and +5V display driver rail; uses MR for door-switch-initiated reset; WDO watches firmware execution loop. Use Value: Guarantees deterministic restart after power interruption and detects software lockups before motor control faults occur. |
Use Scenario: Providing fail-safe reset and watchdog coverage for medical diagnostic equipment requiring IEC 62304 compliance. IC Role / Device Role / Timing Role: Acts as primary safety supervisor: RESET ensures clean boot; WDO validates real-time OS task scheduling; PFO monitors backup battery voltage. Use Value: Meets Class C software safety requirements by independently verifying both power integrity and software liveliness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6707AKA+T | Same pinout and function, but A-version: WDO deasserts immediately when VCC recovers (no WDI toggle required); non-latching behavior | Better suited for systems requiring rapid watchdog recovery after transient undervoltage without software intervention | Select MAX6707AKA+T if immediate WDO release on VCC recovery is required; otherwise MAX6707LKA+T offers standard latched watchdog behavior |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no PFI/PFO, no WDO - only RESET and MR; 35µA ICC, 200ms timeout | Lacks power-fail warning and independent watchdog output; suitable only for basic single-rail reset needs | Choose TPS3808G33DBVR only when PFI/PFO and WDO functionality are unnecessary and cost is primary constraint |
Compared with MAX6707AKA+T, MAX6707LKA+T provides latched watchdog behavior requiring WDI toggle to clear WDO - enhancing fault isolation in safety-critical designs; versus TPS3808G33DBVR, it adds full power-fail warning and independent watchdog output at higher integration density.
Availability
MAX6707LKA+T is available at Aetrix Electronics and suitable for industrial controllers, telecom power management, smart white goods, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX6707LKA+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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6701–MAX6708 family was engineered specifically for robust, low-component-count microprocessor supervision in multivoltage embedded systems operating from -40°C to +125°C.
FAQ
What is the reset threshold voltage of MAX6707LKA+T?
The MAX6707LKA+T has a nominal VCC reset threshold of 4.63V (L-suffix), with guaranteed range of 4.47V to 4.78V over -40°C to +125°C. This threshold is factory-trimmed and applies to the primary VCC supply monitoring function, enabling precise brownout detection for +5V systems without external components.
Does MAX6707LKA+T support manual reset triggering?
Yes, MAX6707LKA+T includes an active-low manual reset input (MR) with internal 50kΩ pullup to VCC. Pulling MR low forces a reset pulse lasting the full 140–280ms timeout period, making it ideal for pushbutton-initiated system restarts or external logic-controlled recovery sequences.
How does the watchdog timer in MAX6707LKA+T operate?
The MAX6707LKA+T watchdog timer asserts WDO low if the WDI input remains static for longer than 1.6s (typ). WDO remains latched low until cleared by a WDI edge or MR assertion. Unlike A-versions, the standard MAX6707LKA+T requires explicit WDI toggling to deassert WDO after timeout - ensuring deliberate software acknowledgment.
Can MAX6707LKA+T monitor voltages other than VCC?
Yes, MAX6707LKA+T includes a dedicated PFI input with 0.62V internal reference, allowing external resistor dividers to set custom trip points for secondary supplies (e.g., +12V, +3.3V, or battery rails). The corresponding PFO output signals undervoltage events independently of the main reset function.
What package type and RoHS status does MAX6707LKA+T use?
MAX6707LKA+T is supplied in an 8-pin SOT23 package (K8+2 outline) and is RoHS-compliant and lead-free, as indicated by the "+T" suffix. It measures 2.9mm × 1.6mm × 1.1mm and supports reflow soldering per JEDEC J-STD-020 standards.
MAX6707LKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6707LKA+T FAQ
1.How can I place an order for MAX6707LKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707LKA+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 MAX6707LKA+T reliable?
The price and inventory of MAX6707LKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707LKA+T is usually 5 days.
3.What payment methods are accepted for MAX6707LKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707LKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707LKA+T?
MAX6707LKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707LKA+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 MAX6707LKA+T?
For technical support, including MAX6707LKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707LKA+T requirements.
6.How does Aetrix verify that MAX6707LKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6707LKA+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 MAX6707LKA+T meets industry standards.
7.What is the process for return or replacement of MAX6707LKA+T?
All MAX6707LKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707LKA+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 MAX6707LKA+T part is unused and in its original packaging.
Return procedure for MAX6707LKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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