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Analog Devices Inc./Maxim Integrated MAX6725AKAZGD3+T
- Part No.:
- MAX6725AKAZGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6725AKAZGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,219
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Product details
Overview
MAX6725AKAZGD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit monitoring VCC1 (primary) and VCC2 (secondary) with factory-trimmed reset thresholds, 140ms minimum reset timeout, manual-reset input (MR), and push-pull active-low RST output. It guarantees valid reset logic down to VCC1 or VCC2 = 0.8V and operates across –40°C to +125°C for industrial and automotive power-rail monitoring.
For engineers reviewing the MAX6725AKAZGD3+T datasheet, MAX6725AKAZGD3+T pinout, MAX6725AKAZGD3+T application, or MAX6725AKAZGD3+T equivalent, this page delivers verified specifications, exact pin functions, real-world multivoltage system use cases, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX6725AKAZGD3+T integrates dual independent voltage comparators with hysteresis (0.5% of threshold), a 140ms reset timeout timer, and a manual-reset input with internal 50kΩ pullup to VCC1. Its RST output is push-pull active-low, referenced to VCC1, and asserts when either VCC1 drops below 4.500V (min) or VCC2 falls below 3.000V (min).
It supports no external watchdog or power-fail features - unlike variants such as MAX6729A - and lacks RSTIN/PFI/WDI pins. The device uses only VCC1, VCC2, GND, MR, and RST pins in its 5-pin SOT23-5 package, with guaranteed operation at supply voltages as low as 0.8V on either rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.500V (min) to 4.750V (max); factory-trimmed for primary supply monitoring at nominal 4.625V |
| VCC2 Reset Threshold | 3.000V (min) to 3.150V (max); factory-trimmed for secondary supply monitoring at nominal 3.075V |
| Reset Timeout Period | 140ms (min); ensures μP remains held in reset long enough for full power stabilization after brownout recovery |
| Supply Current | 15µA (typ) at 3.6V; enables battery-backed systems to maintain supervision with negligible quiescent load |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial control environments |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V; guarantees deterministic reset state during deep brownout conditions |
| Output Type | Push-pull active-low RST; eliminates need for external pullup and drives directly into CMOS reset inputs |
Pinout & Package
MAX6725AKAZGD3+T is housed in a 5-pin SOT23-5 package (package code U5+1, outline 21-0057), with thermal resistance θJA = 324.3°C/W (four-layer board) and θJC = 82°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts low when VCC1 < 4.500V or VCC2 < 3.000V and holds for 140ms min after recovery |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; forces reset when pulled low and sustains it for full 140ms timeout |
| 4 | VCC2 | Secondary supply input powering comparator for VCC2 threshold detection; also used as bias source for internal references |
| 5 | VCC1 | Primary supply input powering core logic, RST driver, and VCC1 threshold comparator; defines VOH level for RST output |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with separate factory-trimmed thresholds and hysteresis |
| Guaranteed reset validity at low VCC | Outputs remain logically valid even when VCC1 or VCC2 drops to 0.8V - critical for graceful brownout handling |
| Low quiescent current | 15µA typical supply current at 3.6V enables multi-year operation in energy-constrained applications |
| Push-pull RST output | Eliminates external pullup resistor requirement and ensures fast, rail-to-rail reset assertion without external components |
| Manual-reset integration | On-chip 50kΩ pullup to VCC1 allows direct connection of momentary switch to GND - no external biasing needed |
Applications
| Industrial PLC Power Sequencing | Automotive ADAS Camera Module |
|---|---|
|
Use Scenario: Monitoring 5V main rail and 3.3V I/O rail in programmable logic controller backplane during cold-start and load-dump events. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset until both rails stabilize above 4.500V and 3.000V respectively, with 140ms hold time ensuring FPGA configuration integrity. Use Value: Prevents partial initialization and latch-up by guaranteeing synchronized release of μP and peripheral ICs after power-up transients. |
Use Scenario: Supervising 12V-to-5V DC-DC output and 3.3V image sensor supply in rear-view camera ECU exposed to automotive temperature extremes. IC Role / Device Role / Timing Role: Primary/secondary voltage monitor with –40°C to +125°C operation, asserting reset if either rail dips below threshold during engine cranking. Use Value: Enables reliable boot under 6V cranking conditions while maintaining reset validity down to 0.8V on either rail. |
| Telecom Line Card Hot-Swap | Medical Infusion Pump Controller |
|
Use Scenario: Ensuring safe insertion/removal of line cards in carrier-grade switches by validating precharge and post-insertion rail stability before enabling ASICs. IC Role / Device Role / Timing Role: Dual-supply supervisor verifying 3.3V management rail and 1.8V core rail meet thresholds before releasing reset to FPGA and PHY controllers. Use Value: Eliminates risk of metastability or bus contention during hot-swap by enforcing strict dual-rail readiness before system enable. |
Use Scenario: Monitoring battery-backed 3.3V MCU supply and 5V motor driver rail in Class II medical infusion pump requiring fail-safe power sequencing. IC Role / Device Role / Timing Role: Safety-critical supervisor holding reset during brownout on either rail and sustaining reset for 140ms to allow controlled shutdown sequence. Use Value: Meets IEC 62304 software safety requirements by guaranteeing deterministic reset behavior under undervoltage faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6723AKAZGD3+T | Same 5-pin SOT23-5 package and 140ms timeout, but VCC1 threshold = 2.850V (min), VCC2 = 2.850V (min); no MR pin | Designed for lower-voltage systems (e.g., 3.3V/2.5V dual-rail); lacks manual-reset capability | Select when MR is unnecessary and primary supply is ≤3.0V; not suitable for 4.5V+ VCC1 monitoring |
| TPS3808G33DBVR | 3-pin SOT23-6 package; single-supply (VDD only); fixed 3.3V threshold; 200ms timeout; open-drain RST | Monitors only one rail; requires external pullup; no VCC2 input or MR function | Choose for cost-sensitive single-rail designs where dual monitoring is unnecessary and layout space permits 6-pin footprint |
Compared with MAX6725AKAZGD3+T, MAX6723AKAZGD3+T serves lower-voltage dual-rail systems without manual reset, while TPS3808G33DBVR reduces component count for single-rail applications but sacrifices dual-supply supervision and push-pull drive capability.
Availability
MAX6725AKAZGD3+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, automotive ADAS camera modules, and medical infusion pump controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6725AKAZGD3+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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage dual/triple-supply supervision with guaranteed operation down to 0.8V, targeting high-reliability embedded systems where power-rail integrity is mission-critical.
FAQ
What is the exact reset threshold voltage for VCC1 on MAX6725AKAZGD3+T?
The MAX6725AKAZGD3+T has a factory-trimmed VCC1 reset threshold of 4.500V (minimum), 4.625V (typical), and 4.750V (maximum) - denoted by the 'K' suffix in the ordering code. This ensures reliable detection of brownout on 5V nominal rails before system malfunction occurs.
Does MAX6725AKAZGD3+T support monitoring a third voltage rail?
No, MAX6725AKAZGD3+T does not support third-rail monitoring. It is a dual-supply supervisor with dedicated VCC1 and VCC2 inputs only. Variants like MAX6723A or MAX6727A include RSTIN for adjustable auxiliary voltage monitoring, but MAX6725AKAZGD3+T omits that pin entirely.
What is the function of the MR pin on MAX6725AKAZGD3+T?
The MR pin on MAX6725AKAZGD3+T is an active-low manual-reset input with an internal 50kΩ pullup to VCC1. Pulling MR low forces the RST output low for the full 140ms timeout period, then releases it - enabling hardware-initiated resets for testing, recovery, or field service without cycling power.
Is MAX6725AKAZGD3+T compatible with push-pull or open-drain microprocessor reset inputs?
MAX6725AKAZGD3+T provides a push-pull active-low RST output, making it directly compatible with CMOS reset inputs requiring driven high/low states. It is not open-drain, so no external pullup is needed - unlike open-drain supervisors which require careful impedance matching to avoid timing violations.
What package type and footprint does MAX6725AKAZGD3+T use?
MAX6725AKAZGD3+T uses a 5-pin SOT23-5 package (outline 21-0057, land pattern 90-0174). Its pinout is standardized: Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = VCC1 - matching JEDEC MO-178AC and compatible with automated SMT placement.
MAX6725AKAZGD3+T 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:
- 1.11V, 2.313V, Adj
- Output:
- Open Drain, Open Drain
- Reset:
- Active High/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
MAX6725AKAZGD3+T FAQ
1.How can I place an order for MAX6725AKAZGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6725AKAZGD3+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 MAX6725AKAZGD3+T reliable?
The price and inventory of MAX6725AKAZGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6725AKAZGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6725AKAZGD3+T?
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4.How is shipping managed for MAX6725AKAZGD3+T?
MAX6725AKAZGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6725AKAZGD3+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 MAX6725AKAZGD3+T?
For technical support, including MAX6725AKAZGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6725AKAZGD3+T requirements.
6.How does Aetrix verify that MAX6725AKAZGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6725AKAZGD3+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 MAX6725AKAZGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6725AKAZGD3+T?
All MAX6725AKAZGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6725AKAZGD3+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 MAX6725AKAZGD3+T part is unused and in its original packaging.
Return procedure for MAX6725AKAZGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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