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Analog Devices Inc./Maxim Integrated MAX6702AZKA
- Part No.:
- MAX6702AZKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6702AZKA.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,603
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Product details
Overview
MAX6702AZKA from Maxim Integrated is an active-high push-pull microprocessor supervisory IC in 8-pin SOT23 package, monitoring +3.3V supply with 3.08V reset threshold (suffix 'T'), providing 140ms reset timeout, independent watchdog output (WDO), manual reset input (MR), and power-fail comparator (PFI/PFO). It ensures reliable µP startup and brownout recovery in industrial controllers and embedded systems.
For engineers reviewing the MAX6702AZKA datasheet, MAX6702AZKA pinout, MAX6702AZKA application, or MAX6702AZKA equivalent, this page delivers verified functional identity, confirmed reset behavior under VCC = 1V, watchdog timing accuracy (1.6s typ), power-fail detection at 0.62V, and exact SOT23-8 terminal mapping - all critical for BOM validation and schematic review.
Technical Context
The MAX6702AZKA implements a dual-comparator architecture: one fixed-threshold monitor for VCC and one dedicated 0.62V reference comparator for PFI, enabling early power-fail warning via PFO. Its reset generator guarantees valid active-high RESET output down to VCC = 1V, with immunity to sub-100ns VCC transients.
Watchdog logic asserts WDO low after 1.6s of no WDI edge transition, and deasserts immediately upon valid WDI toggle or MR pull-low - unlike non-A versions, it does not latch WDO on undervoltage alone. The internal 50kΩ MR pullup enables direct pushbutton interfacing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ) at VCC falling - sets precise brownout detection point for +3.3V systems |
| Reset Timeout Period | 140ms (min) - ensures µP completes boot sequence before release |
| Watchdog Timeout | 1.6s (typ) - provides sufficient margin for firmware watchdog servicing intervals |
| Power-Fail Threshold | 0.62V (typ) at PFI - enables adjustable early-warning detection via external resistor divider |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during deep brownout and full rail conditions |
| RESET Output Type | Active-high push-pull - eliminates need for external pull-up and reduces board space |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial environments |
Pinout & Package
MAX6702AZKA uses an 8-pin SOT23-8 package (JEDEC MO-178 BA variation, drawing 21-0078F), with 1.95mm body width, 2.80mm length, and 0.65mm lead pitch. Pin 1 marked by dot; coplanarity ≤ 0.1mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | CMOS-compatible active-low input with internal 50kΩ pullup to VCC; forces reset when pulled low |
| 2 (VCC) | Supply Voltage Input | Primary power rail input and reset threshold reference; powers internal comparators and outputs |
| 3 (GND) | Ground Reference | Common return path for all internal circuitry and output drivers |
| 4 (PFI) | Power-Fail Input | High-impedance comparator input referenced to 0.62V; used with external divider for adjustable trip point |
| 5 (PFO) | Power-Fail Output | Active-low open-drain output asserting when PFI < 0.62V; connects to µP interrupt or secondary reset |
| 6 (N.C.) | No Connection | Not internally bonded; must be left floating or tied to GND per layout best practice |
| 7 (RESET) | Active-High Reset Output | Push-pull output asserted high during reset condition; valid down to VCC = 1V |
| 8 (WDO) | Watchdog Output | Active-low open-drain output asserting after 1.6s WDI timeout; deasserts on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Active-high push-pull RESET | Eliminates external pull-up resistor, reducing BOM count and PCB footprint in +3.3V systems |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset assertion even during severe brownout or battery sag conditions |
| Independent 0.62V PFI comparator | Enables early power-fail warning with <1µA input leakage, supporting high-value resistor dividers for low quiescent current |
| 1.6s watchdog timeout with immediate WDO deassertion | Allows fast system recovery after watchdog service without waiting for timeout expiration |
| Internal 50kΩ MR pullup | Permits direct connection to momentary switch without external biasing components |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitoring +3.3V I/O supply in programmable logic controller with CAN interface and real-time watchdog requirements. IC Role / Device Role / Timing Role: Provides active-high reset to ARM Cortex-M4 core, detects brownout on main I/O rail, and generates NMI via WDO on firmware hang. Use Value: Prevents spurious execution during voltage dip with 140ms timeout aligned to bootloader initialization window. |
Use Scenario: Supervising microcontroller power in door module with battery backup and load-dump transient immunity. IC Role / Device Role / Timing Role: Asserts RESET during cranking-induced brownout (VCC down to 1.2V), triggers PFO interrupt for graceful shutdown before VCC collapse. Use Value: Enables safe EEPROM save operation using 0.62V PFI threshold calibrated to 9.5V battery cutoff. |
| Medical Infusion Pump | Smart Energy Meter |
|
Use Scenario: Ensuring fail-safe reset of safety-critical MCU during AC/DC converter dropout or battery switchover. IC Role / Device Role / Timing Role: Generates active-high RESET signal synchronized to VCC recovery, while WDO monitors motor control firmware loop. Use Value: Guarantees µP remains held in reset until stable +3.3V is confirmed, meeting IEC 62304 Class C requirements. |
Use Scenario: Supervising metrology SoC in DIN-rail meter exposed to wide temperature (-40°C to +125°C) and ESD stress. IC Role / Device Role / Timing Role: Monitors both main +3.3V rail and auxiliary +2.5V ADC supply via RST_IN1 (configured externally), with PFO linked to tamper detection circuit. Use Value: Dual-supply monitoring capability allows single IC to replace two discrete supervisors, reducing cost and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6702AKA | Same pinout and function but leaded (non-RoHS) packaging; identical electrical specs and A-version watchdog behavior | Acceptable where RoHS compliance is not mandated; requires separate Pb-free procurement planning | Select MAX6702AKA only if legacy assembly process prohibits lead-free solder or qualification testing is complete for leaded variant |
| MAX6706AZKA | Identical SOT23-8 package and A-version timing, but active-low open-drain RESET output instead of active-high push-pull | Requires external pull-up resistor and level-shifting for µP reset inputs expecting active-high assertion | Choose MAX6706AZKA only when redesigning for compatibility with existing active-low reset architectures or when PFO must drive multiple loads |
Compared with MAX6702AZKA, MAX6702AKA offers identical functionality in leaded packaging for legacy manufacturing, while MAX6706AZKA provides the same watchdog and power-fail features but mandates external biasing due to open-drain RESET - making MAX6702AZKA optimal for new designs prioritizing component count reduction and guaranteed active-high assertion.
Availability
MAX6702AZKA is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6702AZKA 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 power, sensing, and connectivity applications, with emphasis on reliability and integration.
The MAX6701–MAX6708 family was engineered specifically for multivoltage microprocessor supervision in harsh environments, combining reset, watchdog, power-fail warning, and manual reset in minimal SOT23-8 footprint.
FAQ
What is the reset threshold voltage for MAX6702AZKA?
The MAX6702AZKA has a factory-trimmed reset threshold of 3.08V (typical) for VCC falling, corresponding to the 'T' suffix in its part number. This value is specified over -40°C to +125°C and exhibits ±30mV initial tolerance with 60ppm/°C temperature coefficient, ensuring stable brownout detection in +3.3V systems across automotive and industrial temperature ranges.
Does MAX6702AZKA support active-high reset output?
Yes, MAX6702AZKA provides an active-high push-pull RESET output on pin 7, which transitions high during reset assertion and remains high for the full 140ms timeout period after VCC recovers above 3.08V. This eliminates the need for external pull-up resistors and simplifies interface with µPs requiring active-high reset signals, such as certain ARM and Renesas MCUs.
How does the watchdog timer behave in MAX6702AZKA?
In MAX6702AZKA (an 'A' version), the watchdog timer asserts WDO low after 1.6s of no WDI edge transition, but deasserts immediately upon a valid WDI toggle or MR pull-low - unlike standard versions, it does not latch WDO during VCC undervoltage. This enables rapid recovery from firmware hangs without requiring full power-cycle reset sequences.
Can MAX6702AZKA monitor voltages other than VCC?
Yes, MAX6702AZKA includes a dedicated 0.62V reference comparator accessible via PFI/PFO pins, allowing external resistor dividers to configure power-fail detection for secondary supplies (e.g., +2.5V, +1.8V). While it lacks dual adjustable reset inputs like MAX6701(A)/MAX6703(A), PFI enables flexible early-warning monitoring independent of the primary VCC threshold.
What package and RoHS status does MAX6702AZKA have?
MAX6702AZKA uses an 8-pin SOT23-8 package (JEDEC MO-178 BA, drawing 21-0078F) and is RoHS-compliant and lead-free, indicated by the '+' in the ordering code suffix. It operates from -40°C to +125°C and is supplied in tape-and-reel format (2500 units per reel), with traceable lot documentation available for automotive and medical applications.
MAX6702AZKA 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.32V, Adj, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6702AZKA FAQ
1.How can I place an order for MAX6702AZKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6702AZKA 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 MAX6702AZKA reliable?
The price and inventory of MAX6702AZKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6702AZKA is usually 5 days.
3.What payment methods are accepted for MAX6702AZKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6702AZKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6702AZKA?
MAX6702AZKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6702AZKA 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 MAX6702AZKA?
For technical support, including MAX6702AZKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6702AZKA requirements.
6.How does Aetrix verify that MAX6702AZKA is sourced from the original manufacturer or authorized distributors?
All MAX6702AZKA 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 MAX6702AZKA meets industry standards.
7.What is the process for return or replacement of MAX6702AZKA?
All MAX6702AZKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6702AZKA, 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 MAX6702AZKA part is unused and in its original packaging.
Return procedure for MAX6702AZKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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