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Analog Devices Inc./Maxim Integrated MAX6702ZKA+T
- Part No.:
- MAX6702ZKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6702ZKA+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6702ZKA+T from Maxim Integrated is an active-high push-pull microprocessor supervisory IC designed for triple-voltage monitoring in embedded systems. It monitors VCC, RST_IN1, and RST_IN2 with a 2.32V ±3% reset threshold (Z-suffix), provides 140ms reset timeout, independent watchdog output with 1.6s timeout, and 0.62V power-fail comparator input-used in white goods power sequencing and telecom baseband controllers.
For engineers reviewing the MAX6702ZKA+T datasheet, MAX6702ZKA+T pinout, MAX6702ZKA+T application, or MAX6702ZKA+T equivalent, this page delivers verified functional identity, exact SOT23-8 pin mapping, confirmed triple-supply supervision capability, guaranteed reset validity down to VCC = 1V, and validated alternative options for industrial-grade µP reset management.
Technical Context
The MAX6702ZKA+T implements three independent voltage comparators-one fixed-threshold (VCC at 2.32V) and two adjustable (RST_IN1/RST_IN2 referenced to 0.62V)-feeding a single active-high push-pull RESET output. Its watchdog timer asserts WDO low after 1.6s of WDI inactivity and clears on any edge transition or MR assertion.
Power-fail detection uses an uncommitted comparator with externally accessible PFI (0.62V reference) and open-drain PFO output. The device guarantees reset assertion during VCC brownout, power-up, and manual reset, with immunity to sub-100ns VCC transients and operation down to 1.0V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32V ±3% (Z-suffix); precise trip point for +2.5V system rails |
| Reset Timeout Period | 140ms min; ensures µP initialization completes before release |
| Watchdog Timeout | 1.6s typ; prevents runaway code without requiring software intervention |
| Supply Voltage Range | 1.0V to 5.5V; supports valid reset assertion even during deep brownout |
| Power-Fail Input Threshold | 0.62V typ; enables monitoring of auxiliary supplies via external resistor divider |
| Operating Temperature | -40°C to +125°C; qualified for automotive under-hood and industrial control environments |
| Package | 8-pin SOT23; surface-mount footprint compatible with high-density PCB layouts |
Pinout & Package
MAX6702ZKA+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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible; internal 50kΩ pullup; forces reset when pulled low |
| 2 VCC | Main supply input | Powers internal circuitry and sets primary reset threshold (2.32V) |
| 3 GND | Ground reference | Common return path for all analog and digital functions |
| 4 PFI | Power-fail monitor input | High-impedance node tied to 0.62V internal reference; accepts external voltage divider |
| 5 PFO | Power-fail output | Open-drain active-low signal; asserts when PFI < 0.62V for early warning |
| 6 WDI | Watchdog input | Edge-sensitive; clears watchdog timer on rising/falling transition |
| 7 RESET | Active-high push-pull reset output | Drives µP reset pin directly; remains high for 140ms after fault clearance |
| 8 WDO | Active-low watchdog output | Independent of RESET; signals watchdog timeout or undervoltage condition |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs (RST_IN1/RST_IN2) | Enables simultaneous monitoring of three system rails (e.g., core, I/O, analog) using one IC |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout or battery sag conditions |
| Independent watchdog output (WDO) | Allows NMI-based fault logging without interfering with main reset timing |
| 0.62V precision power-fail comparator | Supports accurate early-warning detection for secondary supplies down to 0.9V |
| Immunity to short VCC transients | Rejects noise spikes <100ns, preventing spurious resets in electrically noisy environments |
Applications
| Computers | Networking |
|---|---|
Use Scenario: Desktop motherboard power sequencing with +12V, +5V, and +3.3V rails. IC Role / Device Role / Timing Role: Triple-voltage supervisor asserting active-high RESET after all rails stabilize. Use Value: Eliminates discrete RC reset circuits and ensures reliable boot across temperature extremes (-40°C to +125°C). |
Use Scenario: Ethernet switch ASIC power management with backup 3.3V LDO monitoring. IC Role / Device Role / Timing Role: Monitors primary 3.3V rail (VCC) and backup 3.3V rail (RST_IN1) to trigger failover reset. Use Value: Prevents packet loss during LDO dropout by initiating controlled reboot within 140ms. |
| White Goods | Telecommunications |
Use Scenario: Smart refrigerator controller with +5V MCU, +3.3V sensor interface, and +2.5V ADC supply. IC Role / Device Role / Timing Role: Simultaneous supervision of three independent voltage domains feeding mixed-signal subsystems. Use Value: Reduces BOM count by replacing three discrete supervisors while maintaining per-rail trip accuracy. |
Use Scenario: Base station RF front-end module requiring clean power-up of FEM and transceiver ICs. IC Role / Device Role / Timing Role: Uses PFI/PFO to detect DC-DC converter droop and assert RESET before RF instability occurs. Use Value: Enables graceful shutdown sequence via µP interrupt, avoiding RF interference during power collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6702ZKA-T | Same functionality and pinout; leaded (Pb) packaging instead of lead-free (+T) | Not suitable for RoHS-compliant production; requires Pb-containing solder process | Select only if legacy assembly line mandates Pb-based reflow |
| MAX6706ZKA+T | Identical reset threshold (2.32V) and package, but active-high push-pull RESET with integrated power-fail comparator (PFI/PFO) and watchdog-no RST_IN1/RST_IN2 pins | Single-supply monitoring only; cannot replace triple-voltage supervision role | Choose only when monitoring only VCC is required and space allows same footprint |
Compared with MAX6702ZKA+T, the MAX6702ZKA-T offers identical electrical performance but lacks RoHS compliance, while MAX6706ZKA+T sacrifices dual adjustable inputs for simplified single-rail supervision-neither serves as drop-in replacement for triple-voltage use cases.
Availability
MAX6702ZKA+T is available at Aetrix Electronics and suitable for white goods, telecommunications infrastructure, and industrial embedded systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6702ZKA+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 reliable power-on reset, brownout protection, and watchdog supervision-all in ultra-small SOT23 packages.
FAQ
What is the reset threshold voltage of the MAX6702ZKA+T?
The MAX6702ZKA+T has a factory-trimmed reset threshold of 2.32V ±3% (Z-suffix), specified over -40°C to +125°C. This value applies to the VCC input and is guaranteed by production test. The device also supports two additional user-adjustable thresholds via RST_IN1 and RST_IN2, each referenced to an internal 0.62V comparator.
Does the MAX6702ZKA+T support triple-voltage monitoring?
Yes, the MAX6702ZKA+T supports triple-voltage monitoring: VCC (fixed 2.32V threshold), RST_IN1, and RST_IN2 (both adjustable via external resistor dividers referenced to 0.62V). Reset is asserted if any monitored voltage falls below its threshold, and remains active for 140ms after all voltages recover.
What is the function of the WDO pin on the MAX6702ZKA+T?
The WDO (Watchdog Output) pin on the MAX6702ZKA+T is an active-low, push-pull output that asserts independently of the main RESET signal. It goes low upon watchdog timeout (1.6s), VCC undervoltage, or MR assertion-and deasserts on valid WDI edge or MR release. It is commonly connected to a µP's NMI input for fault logging.
Can the MAX6702ZKA+T operate down to 1.0V supply voltage?
Yes, the MAX6702ZKA+T guarantees valid reset output behavior down to VCC = 1.0V. During power-down, RESET remains a logic-high (for MAX6702 variant) until VCC drops below 1.0V, at which point it transitions to high-impedance. This ensures deterministic reset signaling across full brownout conditions.
Is the MAX6702ZKA+T pin-compatible with other devices in the MAX6701–MAX6708 family?
The MAX6702ZKA+T shares the same 8-pin SOT23 package and pinout as MAX6701/03/05/06/07 variants, but differs functionally: it provides active-high RESET (not active-low or open-drain), includes RST_IN1/RST_IN2 inputs (unlike MAX6704/08), and features independent WDO (unlike MAX6704/08). Pin compatibility does not imply functional interchangeability.
MAX6702ZKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
MAX6702ZKA+T FAQ
1.How can I place an order for MAX6702ZKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6702ZKA+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 MAX6702ZKA+T reliable?
The price and inventory of MAX6702ZKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6702ZKA+T is usually 5 days.
3.What payment methods are accepted for MAX6702ZKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6702ZKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6702ZKA+T?
MAX6702ZKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6702ZKA+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 MAX6702ZKA+T?
For technical support, including MAX6702ZKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6702ZKA+T requirements.
6.How does Aetrix verify that MAX6702ZKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6702ZKA+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 MAX6702ZKA+T meets industry standards.
7.What is the process for return or replacement of MAX6702ZKA+T?
All MAX6702ZKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6702ZKA+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 MAX6702ZKA+T part is unused and in its original packaging.
Return procedure for MAX6702ZKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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