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Analog Devices Inc./Maxim Integrated MAX6703TKA+TG071
- Part No.:
- MAX6703TKA+TG071
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6703TKA+TG071.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,563
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Product details
Overview
MAX6703TKA+TG071 from Maxim Integrated is a precision microprocessor supervisory IC in 8-pin SOT23 package, providing triple-voltage monitoring (one fixed + two adjustable thresholds), active-low open-drain reset output, manual reset input, and independent watchdog timer with 1.6s timeout. It guarantees valid reset down to VCC = 1V and supports critical µP power monitoring in white goods and telecom systems.
For engineers reviewing the MAX6703TKA+TG071 datasheet, MAX6703TKA+TG071 pinout, MAX6703TKA+TG071 application, or MAX6703TKA+TG071 equivalent, this page delivers verified specifications, validated pin functions, confirmed triple-supply supervision capability, exact reset timeout (140ms), and real-world alternative part guidance for industrial embedded and networking designs.
Technical Context
The MAX6703TKA+TG071 implements a dual adjustable reset input architecture (RST_IN1/RST_IN2) alongside primary VCC monitoring, enabling simultaneous supervision of three system rails - e.g., +5.0V, +3.3V, and +2.5V - each referenced to a 0.62V internal comparator threshold. Its watchdog circuit asserts WDO low after 1.6s of no WDI edge transition and clears on any rising/falling edge.
Reset generation uses an internal timeout timer that holds RESET low for ≥140ms after VCC, RST_IN1, or RST_IN2 rises above threshold; brownout detection remains active during reset pulses. The device operates across –40°C to +125°C and maintains guaranteed reset validity down to VCC = 1V with immunity to short falling-VCC transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VCC) | 3.08V nominal (T-suffix), ±3% over –40°C to +125°C - sets primary supply monitor point for +3.3V systems |
| Reset Timeout Period | 140ms minimum - ensures µP initialization completes before release from reset |
| Watchdog Timeout | 1.6s typical - provides reliable firmware hang detection without false triggers |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during brownout and enables use with low-voltage µPs |
| Power-Fail Input Threshold | 0.62V ±9mV - enables precise external voltage-divider-based monitoring of secondary supplies |
| Quiescent Current | 9µA typical at VCC < 3.6V - minimizes standby power in battery-backed or energy-sensitive applications |
| Operating Temperature | –40°C to +125°C - qualified for automotive-grade and industrial control environments |
Pinout & Package
MAX6703TKA+TG071 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; pulling low forces reset and clears watchdog; debounces pushbutton switches |
| 2 VCC | Main supply input | Primary power rail monitored for reset; powers internal comparators and outputs; valid down to 1.2V |
| 3 GND | Ground reference | Common return path for all internal circuits and output drivers |
| 4 PFI | Power-fail input | High-impedance comparator input (0.62V threshold); connects to external resistor divider for secondary supply monitoring |
| 5 PFO | Power-fail output | Open-drain active-low output; signals early power failure to µP interrupt line before main supply collapse |
| 6 WDI | Watchdog input | Edge-sensitive input; requires toggle every ≤1.6s to prevent WDO assertion; 50ns minimum pulse width detectable |
| 7 RESET | Active-low reset output | Open-drain output; asserted low during power-up, brownout, or MR activation; holds low ≥140ms after recovery |
| 8 WDO | Watchdog output | Open-drain active-low output; independent of RESET; latched low on timeout or undervoltage; cleared by WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs (RST_IN1/RST_IN2) | Enables triple-rail supervision using external resistive dividers - critical for multi-voltage µP systems with I/O, core, and analog supplies |
| Independent watchdog output (WDO) | Provides dedicated NMI-capable fault signal without affecting reset timing - allows separate watchdog handling in firmware |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset state even during deep brownout - eliminates undefined behavior during power collapse |
| Immunity to short falling-VCC transients | Rejects sub-µs supply dips (≤40µs at 10mV/µs overdrive) - prevents spurious resets in noisy power environments |
| 140ms reset timeout with temperature stability | Remains within 120–300ms range over full –40°C to +125°C - guarantees consistent boot timing across operating conditions |
Applications
| White Goods Control | Industrial Networking Equipment |
|---|---|
Use Scenario: Supervising multiple rails (+5V MCU, +3.3V I/O, +2.5V sensor interface) in washing machine control boards. IC Role / Device Role / Timing Role: Triple-voltage supervisor generating synchronized reset and early power-fail warning via PFO. Use Value: Prevents erratic MCU behavior during mains fluctuations and enables graceful shutdown before EEPROM corruption. |
Use Scenario: Monitoring +3.3V PHY supply and +2.5V switch fabric voltage in managed Ethernet switches. IC Role / Device Role / Timing Role: Dual adjustable input supervisor asserting reset if either rail drops below threshold, with watchdog guarding firmware execution. Use Value: Eliminates need for discrete comparators and RC timers - reduces BOM count while improving timing accuracy vs. discrete solutions. |
| Telecom Power Management | Critical µP Power Monitoring |
Use Scenario: Detecting imminent DC-DC converter failure in base station remote radio units. IC Role / Device Role / Timing Role: PFI-connected to regulated +12V intermediate bus; PFO triggers µP interrupt for predictive maintenance logging. Use Value: 0.62V threshold enables accurate trip point setting with 1% resistor networks - achieves ±20mV trip accuracy. |
Use Scenario: Ensuring reliable boot sequence in medical diagnostic controllers where reset failure risks safety-critical faults. IC Role / Device Role / Timing Role: Primary VCC supervisor with MR-driven hardware reset and independent WDO for firmware health check. Use Value: 1.6s watchdog timeout matches typical firmware task cycle time - detects hung threads without false positives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6703TKA+T | Same functionality but leaded packaging ("-T" vs "+T"); identical electrical specs and pinout | No difference in circuit design or layout - only RoHS compliance and soldering profile differ | Select MAX6703TKA+T only if leaded assembly is required; otherwise MAX6703TKA+TG071 is preferred for RoHS compliance. |
| TPS3808G33DBVR | Single-supply supervisor (3.3V fixed threshold), no dual adjustable inputs or PFI/PFO; 200ms reset timeout | Lacks triple-rail monitoring and power-fail warning capability - unsuitable where secondary supply supervision is needed | Use only when monitoring one rail and no early warning or multi-voltage supervision is required; not a functional replacement. |
Compared with MAX6703TKA+T, MAX6703TKA+TG071 offers identical supervision performance with lead-free compliance; compared with TPS3808G33DBVR, it adds dual adjustable inputs and PFI/PFO - essential for systems requiring coordinated multi-rail reset and predictive power-fail response.
Availability
MAX6703TKA+TG071 is available at Aetrix Electronics and suitable for white goods control, industrial networking equipment, telecom power management, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX6703TKA+TG071 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 industrial, communications, and computing applications.
The MAX6701–MAX6708 family was engineered specifically for robust, low-power microprocessor supervision in harsh environments - delivering integrated reset, watchdog, and power-fail functions in ultra-small SOT23 packages.
FAQ
What is the reset threshold voltage for MAX6703TKA+TG071?
The MAX6703TKA+TG071 has a nominal VCC reset threshold of 3.08V (T-suffix), with guaranteed tolerance of ±3% over –40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table under "VTH" for MAX670_T/MAX670_AT versions. The threshold applies to the primary VCC supply monitoring function and enables reliable supervision of +3.3V systems.
Does MAX6703TKA+TG071 support triple-voltage monitoring?
Yes, MAX6703TKA+TG071 supports triple-voltage monitoring via its dual adjustable reset inputs (RST_IN1 and RST_IN2), in addition to primary VCC monitoring. Each input references the same 0.62V internal comparator, allowing external resistor dividers to set custom thresholds for secondary supplies such as +2.5V or +1.8V rails - a key feature distinguishing it from single-threshold supervisors.
What is the function of the PFI and PFO pins on MAX6703TKA+TG071?
PFI is a high-impedance input for the uncommitted power-fail comparator (threshold = 0.62V), used to monitor secondary supplies via external resistor dividers. PFO is its corresponding open-drain active-low output, asserting when PFI falls below threshold. Together, they enable early power-fail warning - for example, triggering a µP interrupt to save data before main supply collapse.
Is the watchdog timer on MAX6703TKA+TG071 independent of the reset function?
Yes, the watchdog timer on MAX6703TKA+TG071 produces an independent WDO output that asserts low after 1.6s of no WDI edge transition. WDO is not tied to the RESET output - it can be used separately (e.g., connected to an NMI input), and its assertion does not affect reset timing. The A-version (denoted by "A" in part number) also allows WDO deassertion via MR low or WDI edge.
What package type and dimensions does MAX6703TKA+TG071 use?
MAX6703TKA+TG071 uses an 8-pin SOT23 package (package code K8+2), with footprint outline 21-0078 and land pattern 90-0176. Its dimensions are 2.9mm × 1.6mm × 1.1mm. The "+T" suffix confirms RoHS-compliant, lead-free construction, and the "G071" suffix indicates tape-and-reel packaging per standard ordering format.
MAX6703TKA+TG071 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 3.08V, Adj, Adj
- 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
MAX6703TKA+TG071 FAQ
1.How can I place an order for MAX6703TKA+TG071 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6703TKA+TG071 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 MAX6703TKA+TG071 reliable?
The price and inventory of MAX6703TKA+TG071 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6703TKA+TG071 is usually 5 days.
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Once your MAX6703TKA+TG071 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 MAX6703TKA+TG071?
For technical support, including MAX6703TKA+TG071 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6703TKA+TG071 requirements.
6.How does Aetrix verify that MAX6703TKA+TG071 is sourced from the original manufacturer or authorized distributors?
All MAX6703TKA+TG071 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 MAX6703TKA+TG071 meets industry standards.
7.What is the process for return or replacement of MAX6703TKA+TG071?
All MAX6703TKA+TG071 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6703TKA+TG071, 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 MAX6703TKA+TG071 part is unused and in its original packaging.
Return procedure for MAX6703TKA+TG071:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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