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Analog Devices Inc./Maxim Integrated MAX6707TKA
- Part No.:
- MAX6707TKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6707TKA.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:1,815
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Product details
Overview
MAX6707TKA from Maxim Integrated is a low-voltage, 8-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, independent watchdog timer (1.6s timeout), 0.62V power-fail comparator input, and manual reset input. It monitors a single supply voltage (threshold determined by suffix 'K' = 2.93V), asserts reset during power-up/down/brownout, and supports critical embedded systems requiring reliable power sequencing and fault recovery.
For engineers reviewing the MAX6707TKA datasheet, MAX6707TKA pinout, MAX6707TKA application, or MAX6707TKA equivalent, this device delivers precise single-supply supervision with integrated power-fail warning, watchdog monitoring, and manual reset - key for automotive control units, industrial PLCs, and telecom base station management where deterministic reset behavior and undervoltage detection are mandatory.
Technical Context
The MAX6707TKA implements a dedicated reset generator with 140ms timeout delay and guaranteed reset validity down to VCC = 1V. Its internal 0.62V reference enables accurate power-fail detection via external resistor divider on PFI, with PFO providing an independent active-low output.
It features a standalone watchdog timer that triggers WDO assertion after 1.6s of no WDI edge transition; WDO deasserts immediately upon valid WDI toggle or MR pull-low (A-version behavior). Reset is asserted if VCC falls below 2.93V (±3% over -40°C to +125°C), with 60ppm/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (±3%), fixed threshold for single-supply monitoring per 'T' suffix; ensures reset assertion before system brownout |
| Reset Timeout Period | 140ms (typ), guarantees minimum reset pulse width for µP initialization and state clearing |
| Watchdog Timeout | 1.6s (typ), provides fail-safe recovery window for firmware hang detection without external timing components |
| Power-Fail Input Threshold | 0.62V (typ), stable internal reference enabling adjustable early-warning detection of secondary supplies |
| Supply Current | 9µA (typ at VCC = 3.3V), ultra-low quiescent current suitable for battery-backed or always-on monitoring |
| Operating Voltage Range | 1.2V to 5.5V, supports operation during deep brownout and enables reset assertion even as VCC collapses |
| Output Type | Active-low open-drain RESET and WDO, allowing wired-OR configuration and level-shifting flexibility |
Pinout & Package
MAX6707TKA is housed in an 8-pin SOT23-8 package (3.00mm × 1.75mm × 1.30mm), RoHS-compliant, with lead-free option available (+T suffix). Pin 1 marked by dot; pins 1–8 arranged counterclockwise from top-left in top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | CMOS-compatible active-low input with 50kΩ internal pullup; forces reset when pulled low; also clears watchdog timer |
| 2 VCC | Supply Voltage Input | Primary power rail input (1.2–5.5V); powers internal circuitry and sets reset threshold reference point |
| 3 GND | Ground Reference | System ground return for all internal comparators, timers, and outputs |
| 4 PFI | Power-Fail Input | High-impedance comparator input referenced to 0.62V; accepts external voltage divider for adjustable undervoltage detection |
| 5 PFO | Power-Fail Output | Active-low open-drain output asserting when PFI < 0.62V; used for early warning interrupt or cascaded reset initiation |
| 6 WDI | Watchdog Input | Edge-sensitive input; rising or falling edge resets 1.6s watchdog timer; pulses ≥50ns detected |
| 7 RESET | Reset Output | Active-low open-drain output; asserted during VCC brownout, MR low, or watchdog timeout; requires external pullup |
| 8 WDO | Watchdog Output | Independent active-low open-drain output; asserted only on watchdog timeout (not on VCC drop); deasserts on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply supervision with fixed 2.93V threshold | Eliminates need for external resistive divider on VCC; simplifies BOM and layout for +3.3V systems |
| Independent power-fail comparator (PFI/PFO) | Enables early warning of auxiliary supply collapse (e.g., backup battery, I/O rail) without affecting primary reset path |
| Watchdog timer with immediate WDO deassertion | Supports responsive firmware recovery: WDO clears instantly on WDI toggle, avoiding unnecessary NMI lockout |
| Guaranteed reset operation down to VCC = 1V | Ensures deterministic reset assertion during severe brownout, preventing µP runaway before power loss |
| Immunity to short VCC transients | Rejects noise spikes ≤100ns duration, preventing false resets in electrically noisy environments (e.g., motor drives) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Monitoring 3.3V microcontroller supply and 5V sensor interface rail in under-hood ECU with wide temperature swings. IC Role / Device Role / Timing Role: Primary supervisor ensuring safe µP boot and brownout recovery; PFI monitors 5V rail via divider to trigger PFO interrupt before main reset. Use Value: Prevents corrupted flash writes during voltage sag; 140ms reset pulse meets ISO 16750-2 cold-crank timing requirements. |
Use Scenario: Supervising ARM Cortex-M7 core supply in modular PLC backplane with redundant power inputs. IC Role / Device Role / Timing Role: Single-supply monitor for 3.3V core rail; WDI fed by watchdog GPIO; WDO connected to safety FPGA for dual-channel fault reporting. Use Value: Enables SIL2-compliant diagnostics: independent WDO confirms firmware liveness separate from reset assertion path. |
| Telecom Base Station Management | White Goods Main Control Board |
Use Scenario: Power sequencing and fault monitoring for multi-rail DC-DC converter in 5G remote radio unit (RRU). IC Role / Device Role / Timing Role: VCC supervision of 3.3V management MCU; PFI tied to 12V bias supply via divider to detect PSU failure before thermal shutdown. Use Value: PFO interrupt allows graceful RF shutdown and log capture; 2.93V threshold matches 3.3V LDO dropout margin. |
Use Scenario: Reset coordination for 3.3V main MCU and 5V display driver in smart refrigerator control board. IC Role / Device Role / Timing Role: Primary reset generator; MR driven by door-open switch; PFO linked to buzzer driver for low-battery alert. Use Value: Manual reset via mechanical switch eliminates need for dedicated reset IC; open-drain outputs simplify mixed-voltage interfacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6707AKA-T | A-version: WDO deasserts immediately on MR low or WDI edge (no timeout delay); same 2.93V threshold and SOT23-8 package | Preferred where fast watchdog recovery is required (e.g., real-time control loops), but incompatible with legacy non-A timing expectations | Select MAX6707AKA-T only if system firmware relies on immediate WDO clearance post-WDI toggle |
| TPS3808G33DBVR | Texas Instruments part: 3.3V fixed threshold, 200ms reset timeout, push-pull RESET, no PFI/PFO, no watchdog output | Lacks power-fail warning and independent watchdog output; suitable only for basic reset-only applications | Choose TPS3808G33DBVR when cost sensitivity outweighs need for PFO/WDO functionality and open-drain flexibility |
Compared with MAX6707TKA, MAX6707AKA-T offers faster watchdog response but sacrifices compatibility with standard-version timing; TPS3808G33DBVR reduces feature set to cut cost and simplify design, omitting critical diagnostics capability needed for safety-critical supervision.
Availability
MAX6707TKA is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and telecom base station management requiring stable component supply across extended temperature ranges (-40°C to +125°C).
Supply support for MAX6707TKA 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 delivers compact, low-power µP supervision with integrated watchdog, power-fail detection, and manual reset - engineered for reliability in harsh environments where deterministic power sequencing is non-negotiable.
FAQ
What is the exact reset threshold voltage for MAX6707TKA?
The MAX6707TKA has a fixed VCC reset threshold of 2.93V (±3%) over -40°C to +125°C, as defined by the 'T' suffix in its part number. This value is factory-trimmed and specified in the Electrical Characteristics table; it ensures reliable reset assertion before a 3.3V system enters brownout, with 60ppm/°C temperature coefficient maintaining accuracy across operating range.
Does MAX6707TKA support power-fail warning for supplies other than VCC?
Yes, MAX6707TKA supports external power-fail monitoring via its PFI pin, which references an internal 0.62V comparator. By connecting a resistor divider from any monitored supply (e.g., 5V, 12V, or battery rail) to PFI, designers can configure early-warning detection at any desired trip point; PFO then asserts to signal impending failure before VCC drops.
How does the watchdog timer in MAX6707TKA interact with the reset output?
The MAX6707TKA watchdog timer operates independently of the reset generator: WDO asserts on timeout (1.6s), but RESET remains unaffected unless triggered by VCC drop, MR, or external conditions. This separation allows WDO to serve as a dedicated NMI source while RESET handles power-related faults - a key distinction from MAX6704, where watchdog overflow directly pulses RESET.
What is the function of the MR pin on MAX6707TKA, and how should it be used?
The MR pin on MAX6707TKA is an active-low manual reset input with internal 50kΩ pullup to VCC. Pulling MR low forces RESET assertion for the full 140ms timeout period, making it ideal for pushbutton-initiated resets or firmware-triggered recovery. It also clears the watchdog timer, enabling coordinated reset/WDO management - e.g., connecting WDO to MR creates a self-resetting watchdog loop.
Is MAX6707TKA compatible with 1.8V or 2.5V supply rails?
Yes, MAX6707TKA operates from 1.2V to 5.5V and guarantees valid reset output down to VCC = 1V, making it fully compatible with 1.8V and 2.5V systems. Its 2.93V reset threshold applies only to VCC monitoring; for lower-voltage rails, use PFI with appropriate resistor divider to set custom trip points based on the 0.62V internal reference.
MAX6707TKA 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 FAQ
1.How can I place an order for MAX6707TKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707TKA 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 reliable?
The price and inventory of MAX6707TKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707TKA is usually 5 days.
3.What payment methods are accepted for MAX6707TKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707TKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707TKA?
MAX6707TKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707TKA 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?
For technical support, including MAX6707TKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707TKA requirements.
6.How does Aetrix verify that MAX6707TKA is sourced from the original manufacturer or authorized distributors?
All MAX6707TKA 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 meets industry standards.
7.What is the process for return or replacement of MAX6707TKA?
All MAX6707TKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707TKA, 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 part is unused and in its original packaging.
Return procedure for MAX6707TKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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