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Analog Devices Inc./Maxim Integrated MAX6725KAZGD3
- Part No.:
- MAX6725KAZGD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6725KAZGD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:405
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Product details
Overview
The MAX6725KAZGD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 6-pin SOT23 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, and integrated manual-reset input (MR). It ensures reliable system boot and brownout protection in battery-powered and industrial embedded systems requiring stable dual-rail voltage supervision.
For engineers reviewing the MAX6725KAZGD3 datasheet, MAX6725KAZGD3 pinout, MAX6725KAZGD3 application, or MAX6725KAZGD3 equivalent, key selection criteria include its guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, push-pull active-low RST output referenced to VCC1, and compatibility with manual-reset and watchdog-free operation.
Technical Context
The MAX6725KAZGD3 implements dual independent voltage comparators with hysteresis (0.5% of threshold), internal 20ppm/°C tempco, and synchronized reset assertion logic that triggers when either VCC1 or VCC2 falls below its respective factory-trimmed threshold. Its reset timeout timer is monolithic and non-adjustable, set to 210ms (min) per suffix D3.
It features an internal 50kΩ pullup on MR, supports CMOS-level manual reset with 1µs minimum pulse width and 100ns glitch rejection, and guarantees correct reset state during power ramp-down - no external capacitor required for basic operation. The device operates across -40°C to +125°C and draws only 14µA (typ) at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed falling threshold; enables reliable supervision of 5V rails with margin) |
| VCC2 Threshold | 3.075V (factory-trimmed falling threshold; matches common 3.3V I/O supply tolerance) |
| Reset Timeout | 210ms (min); ensures µP completes power-on initialization before release) |
| Supply Current | 14µA (typ at 3.6V); enables multi-year battery life in portable equipment) |
| Operating Temp | -40°C to +125°C; qualified for under-hood automotive and industrial control environments) |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V; guarantees clean reset assertion during deep brownout conditions) |
| MR Input Logic | Active-low with 50kΩ internal pullup to VCC1; eliminates need for external resistor in most designs) |
Pinout & Package
MAX6725KAZGD3 is housed in a RoHS-compliant 6-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), with gull-wing leads and thermal pad not present. Pin 1 is marked by dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-Low Reset Output | Push-pull output referenced to VCC1; asserts low on fault and holds for 210ms min after recovery |
| 2 (GND) | Ground Reference | Common return for all internal comparators, timers, and outputs; must be low-impedance |
| 3 (MR) | Manual-Reset Input | Active-low input with internal 50kΩ pullup to VCC1; 1µs pulse width sufficient to trigger reset |
| 4 (VCC2) | Secondary Supply Input | Powers internal circuitry when VCC2 > VCC1; monitored for 3.075V threshold violation |
| 5 (VCC1) | Primary Supply Input | Main power rail input; powers device and monitored for 4.625V threshold violation |
| 6 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of primary (VCC1) and secondary (VCC2) rails without shared reference error |
| Factory-trimmed precision thresholds | ±1.5% initial accuracy on both VTH1 and VTH2 eliminates calibration overhead in production |
| Guaranteed reset validity to 0.8V | Ensures deterministic reset behavior during severe brownout - no external undervoltage lockout needed |
| Low quiescent current | 14µA typical draw extends battery life in always-on IoT sensors and portable medical devices |
| Integrated MR pullup | Removes external BOM item and PCB footprint; simplifies schematic and reduces assembly cost |
Applications
| Battery-Powered Telematics Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V main rail and 3.3V I/O rail in GPS-enabled vehicle tracking unit powered by Li-ion battery with wide discharge range. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset if either rail drops below spec during cold cranking or battery sag. Use Value: Prevents firmware corruption by holding µP in reset until both supplies stabilize post-brownout, leveraging 210ms timeout and 0.8V validity floor. | Use Scenario: Supervises 24V-to-5V DC-DC output and isolated 3.3V logic supply in DIN-rail mounted programmable controller exposed to factory EMI. IC Role / Device Role / Timing Role: Fault-detection interface between power stage and ARM Cortex-M7 host, providing clean reset signal with noise-immune MR input. Use Value: 100ns MR glitch rejection and 14µA supply current enable robust operation in electrically noisy environments without compromising energy efficiency. |
| Medical Point-of-Care Analyzer | Telecom Remote Radio Head |
Use Scenario: Ensures safe startup and shutdown sequencing of analog front-end (3.3V) and digital processor (5V) in handheld blood analyzer with rechargeable battery. IC Role / Device Role / Timing Role: System integrity guardian triggering hardware reset on any supply deviation outside ±5% window, with manual override via tactile switch on MR. Use Value: Factory-trimmed 4.625V/3.075V thresholds match exact rail tolerances; eliminates need for external resistor dividers or trimming. | Use Scenario: Supervises bias supply (5V) and FPGA core supply (3.3V) in outdoor 5G radio unit operating at -40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-reliability voltage monitor meeting extended temperature qualification (-40°C to +125°C junction) Use Value: Guaranteed operation across full industrial temp range with <20ppm/°C tempco ensures consistent trip points over lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no VCC2 input; 200ms timeout; 1.6µA IQ | Cannot monitor dual rails simultaneously; requires separate IC for second supply | Select only if system has single regulated rail and ultra-low IQ is critical |
| ADM6705ARJZ-REEL7 | Fixed 3.08V VCC1 threshold; no VCC2 monitoring; 200ms timeout; open-drain RST | Lacks secondary supply supervision; requires external pullup; lower temp grade (–40°C to +105°C) | Use where cost sensitivity outweighs dual-rail capability and extended temperature need |
Compared with TPS3808G33DBVR and ADM6705ARJZ-REEL7, the MAX6725KAZGD3 uniquely delivers factory-matched dual-threshold supervision in one 6-pin SOT23, enabling smaller BOM, reduced layout area, and guaranteed coordination between two supply domains - essential for complex embedded systems.
Availability
MAX6725KAZGD3 is available at Aetrix Electronics and suitable for battery-powered telematics, industrial PLC modules, medical point-of-care analyzers, telecom remote radio heads, and automotive body control units requiring stable component supply across extended temperature ranges.
Supply support for MAX6725KAZGD3 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage, dual/triple-supply microprocessor supervisors optimized for space-constrained, high-reliability systems where simultaneous rail monitoring and guaranteed brownout response are mandatory.
FAQ
What is the reset timeout period of the MAX6725KAZGD3?
The MAX6725KAZGD3 has a fixed minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This value is factory-programmed and non-adjustable. The timeout begins when the last monitored supply (VCC1 or VCC2) rises above its respective threshold and ends with deassertion of the active-low RST output. It is guaranteed over the full –40°C to +125°C operating temperature range.
Does the MAX6725KAZGD3 support monitoring a third voltage rail?
No, the MAX6725KAZGD3 does not support a third voltage rail. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. Models such as MAX6723A or MAX6727A include the RSTIN pin for adjustable auxiliary voltage monitoring, but MAX6725KAZGD3 omits this pin and functionality - confirmed by its 6-pin SOT23 pinout and absence of RSTIN in the pin description table.
Is the MR input of the MAX6725KAZGD3 internally pulled up?
Yes, the MR input of the MAX6725KAZGD3 features an internal 50kΩ pullup resistor to VCC1, as specified in the Electrical Characteristics table and Pin Description. This eliminates the need for an external pullup in most designs. The MR pin accepts CMOS-compatible logic levels and requires only a 1µs minimum low pulse width to initiate a reset, with built-in 100ns glitch rejection.
What is the supply voltage range over which the MAX6725KAZGD3 guarantees valid reset operation?
The MAX6725KAZGD3 guarantees correct reset output logic state as long as either VCC1 or VCC2 remains greater than 0.8V - explicitly stated in the General Description and Absolute Maximum Ratings sections. This ensures deterministic reset assertion even during deep brownout conditions, unlike many supervisors that fail unpredictably below 1.0V.
Does the MAX6725KAZGD3 include a watchdog timer function?
No, the MAX6725KAZGD3 does not include a watchdog timer. Its part number suffix and functional description confirm it belongs to the non-watchdog variant group (MAX6725A series). Watchdog capability is present only in MAX6721A–MAX6729A/MAX6797A parts with WDI pin - absent in MAX6725KAZGD3's 6-pin configuration and pin function table.
MAX6725KAZGD3 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:
- 1.11V, 2.313V, Adj
- Output:
- Open Drain, Open Drain
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6725KAZGD3 FAQ
1.How can I place an order for MAX6725KAZGD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6725KAZGD3 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 MAX6725KAZGD3 reliable?
The price and inventory of MAX6725KAZGD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6725KAZGD3 is usually 5 days.
3.What payment methods are accepted for MAX6725KAZGD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6725KAZGD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6725KAZGD3?
MAX6725KAZGD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6725KAZGD3 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 MAX6725KAZGD3?
For technical support, including MAX6725KAZGD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6725KAZGD3 requirements.
6.How does Aetrix verify that MAX6725KAZGD3 is sourced from the original manufacturer or authorized distributors?
All MAX6725KAZGD3 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 MAX6725KAZGD3 meets industry standards.
7.What is the process for return or replacement of MAX6725KAZGD3?
All MAX6725KAZGD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6725KAZGD3, 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 MAX6725KAZGD3 part is unused and in its original packaging.
Return procedure for MAX6725KAZGD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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