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Analog Devices Inc./Maxim Integrated MAX6732UTVDD3+
- Part No.:
- MAX6732UTVDD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6732UTVDD3+.pdf
- Description:
- IC SUPERVISOR SGL/DUAL/TRIP VOLT
- Quantity:
- Payment:
- Shipping:
Inventory:493
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Product details
Overview
MAX6732UTVDD3+ from Maxim Integrated is a dual-voltage microprocessor supervisor IC with active-low open-drain reset and watchdog outputs, factory-set VCC1 = +3.075V and VCC2 = +2.313V thresholds, 210ms (typ) reset timeout, and 1.68s normal watchdog timeout. It monitors two fixed supply rails in embedded systems requiring reliable power-on reset and lockup protection.
For engineers reviewing the MAX6732UTVDD3+ datasheet, MAX6732UTVDD3+ pinout, MAX6732UTVDD3+ application, or MAX6732UTVDD3+ equivalent, this page delivers verified electrical parameters, SOT23-6 package mapping, dual-supply monitoring context, and real-world substitution guidance for telecom, industrial, and computing designs.
Technical Context
The MAX6732UTVDD3+ integrates two independent voltage comparators with ±0.5% hysteresis and 20ppm/°C tempco, each feeding a shared reset timeout timer with six selectable delay options (D1–D6). Its dual-supply architecture enables simultaneous monitoring of primary (VCC1) and secondary (VCC2) rails without external components.
It features a dual-mode watchdog timer: 54s (min) startup delay after reset to accommodate system boot, then automatic transition to 1.68s (min) normal-mode timeout. The WDI input clears the watchdog on any edge, and WDO asserts low independently of RST-enabling separate fault signaling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +3.075V (factory-set, falling edge; monitors main CPU core or I/O rail) |
| VCC2 Threshold | +2.313V (factory-set, falling edge; monitors auxiliary logic or memory rail) |
| Reset Timeout | 210ms (typ); ensures stable power-up before releasing µP from reset) |
| Watchdog Timeout | 1.68s (min) in normal mode; detects software hang within sub-second window |
| Supply Current | 14µA (typ at +3.6V); enables battery-backed operation for >10 years |
| Operating Temp | -40°C to +85°C; qualified for industrial and extended-temperature environments |
| Package | SOT23-6; 2.9mm × 1.6mm footprint, compatible with high-density PCB layouts |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Asserts low when VCC1 < +3.075V or VCC2 < +2.313V; requires external pullup for logic-high state |
| GND | Ground reference | Common return path for all internal comparators, timers, and outputs |
| WDO | Active-low open-drain watchdog output | Independent fault signal-asserts low if WDI misses edge for >1.68s; no dependency on RST state |
| VCC1 | Primary supply input | Powers device and feeds VCC1 comparator; threshold set to +3.075V (TZ suffix) |
| WDI | Watchdog input | Edge-sensitive input; rising/falling transitions reset watchdog timer; no pullup/pulldown required |
| VCC2 | Secondary supply input | Feeds VCC2 comparator; threshold set to +2.313V (Z suffix); powers internal circuitry when >VCC1 |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Eliminates need for external resistive dividers or comparators when tracking +3.075V/+2.313V rails |
| Independent watchdog output | Enables separate system-level fault handling-e.g., log error via WDO while holding µP in reset via RST |
| Immunity to short VCC transients | Rejects glitches ≤100ns at 100mV overdrive, preventing spurious resets during switching noise |
| Guaranteed reset validity down to +0.8V | Ensures clean reset assertion even during brownout conditions where VCC drops below 1V |
| Low 14µA supply current | Reduces standby power in always-on subsystems-critical for battery-powered IoT edge nodes |
Applications
| Telecom Power Management | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring +3.3V backplane and +2.5V FPGA I/O rails in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting coordinated reset to DSP and FPGA upon either rail dropout. Use Value: Prevents partial initialization and metastability by ensuring both processors release reset only after both supplies stabilize. |
Use Scenario: Supervising +3.0V CPU core and +2.3V analog sensor interface in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Fault-detection node triggering safe shutdown and watchdog-initiated recovery on firmware crash. Use Value: Enables unattended recovery from lockups without operator intervention-meeting IEC 61508 functional safety requirements. |
| Embedded Computing Module | Network Switch ASIC Power |
Use Scenario: Validating +3.0V SoC core and +2.3V DDR3 memory rails on compact COM Express modules. IC Role / Device Role / Timing Role: Reset coordinator ensuring memory controller initializes only after stable core voltage. Use Value: Eliminates boot-time memory corruption by enforcing strict voltage sequencing via single IC. |
Use Scenario: Monitoring +3.0V switch fabric and +2.3V SerDes supply in 10G Ethernet switches. IC Role / Device Role / Timing Role: Independent watchdog monitoring ASIC firmware execution while supervising dual power domains. Use Value: Provides deterministic failover-WDO triggers diagnostics while RST holds ASIC in known state during recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6732UTLTD3+ | VCC1 = +4.625V, VCC2 = +3.075V; same SOT23-6 package, identical timing | Targeted at +5V/3.3V legacy systems instead of +3.3V/2.5V modern designs | Select when supervising higher-voltage rails; pinout and reset behavior fully identical |
| TPS3808G33DBVR | Single-supply (3.3V only), push-pull RST, no WDO output; 200ms timeout, 1.5µA quiescent | Lacks dual-rail monitoring and independent watchdog signaling capability | Use only if monitoring one rail suffices and separate fault reporting is unnecessary |
Compared with MAX6732UTVDD3+, MAX6732UTLTD3+ supports higher-voltage systems without layout change, while TPS3808G33DBVR reduces BOM count in single-rail applications but sacrifices dual-monitoring integrity and independent watchdog signaling.
Availability
MAX6732UTVDD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and embedded computing applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX6732UTVDD3+ 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 MAX6730–MAX6735 family targets space-constrained embedded systems needing reliable, low-power dual- and triple-supply supervision with integrated watchdog functionality-optimized for telecom, computing, and industrial equipment.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6732UTVDD3+?
The MAX6732UTVDD3+ has a factory-set VCC1 reset threshold of +3.075V (falling edge), corresponding to the 'T' prefix in the TZ suffix per Maxim's Reset Voltage Threshold Suffix Guide. This value is guaranteed across -40°C to +85°C with ±0.5% hysteresis and 20ppm/°C tempco, ensuring stable trip points in varying thermal environments. The MAX6732UTVDD3+ uses this threshold to monitor primary supply rails such as +3.3V I/O domains.
Does the MAX6732UTVDD3+ include a manual reset input (MR)?
No, the MAX6732UTVDD3+ does not include a manual reset input. Per Maxim's Selector Guide, only MAX6730/MAX6731/MAX6734/MAX6735 variants feature MR; MAX6732/MAX6733 are dual-supply supervisors without MR. The MAX6732UTVDD3+ relies solely on voltage monitoring and watchdog-triggered reset, making it suitable for automated systems where operator-initiated reset is unnecessary.
What is the watchdog timeout behavior of the MAX6732UTVDD3+ during power-up?
The MAX6732UTVDD3+ implements a dual-mode watchdog timer: after reset assertion (power-up, brownout, or watchdog timeout), it enters a 54s (min) startup delay before transitioning to normal 1.68s (min) timeout mode. This allows full system initialization-including bootloader execution and peripheral configuration-before watchdog enforcement begins. The MAX6732UTVDD3+ guarantees this behavior across its full -40°C to +85°C operating range.
Can the MAX6732UTVDD3+ monitor a third voltage rail?
No, the MAX6732UTVDD3+ monitors only two fixed voltages (VCC1 and VCC2) and lacks the RSTIN adjustable input found on MAX6734/MAX6735 variants. Its pinout omits RSTIN, and datasheet specifications confirm it is a dual-supply-not triple-supply-supervisor. To monitor three rails, engineers must select MAX6734UTVDD3+ or MAX6735UTVDD3+, which add the 626mV-reference RSTIN comparator.
What package type and dimensions does the MAX6732UTVDD3+ use?
The MAX6732UTVDD3+ uses a RoHS-compliant lead-free SOT23-6 package (U6+1 code), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads. Its thermal resistance is θJA = 230°C/W on a four-layer JEDEC board. This compact footprint enables high-density placement in space-constrained applications like network interface cards and modular PLCs, and the MAX6732UTVDD3+ is fully compatible with standard SOT23 reflow profiles.
MAX6732UTVDD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 0.788V, 1.575V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX6732UTVDD3+ FAQ
1.How can I place an order for MAX6732UTVDD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6732UTVDD3+ 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 MAX6732UTVDD3+ reliable?
The price and inventory of MAX6732UTVDD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6732UTVDD3+ is usually 5 days.
3.What payment methods are accepted for MAX6732UTVDD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6732UTVDD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6732UTVDD3+?
MAX6732UTVDD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6732UTVDD3+ 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 MAX6732UTVDD3+?
For technical support, including MAX6732UTVDD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6732UTVDD3+ requirements.
6.How does Aetrix verify that MAX6732UTVDD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6732UTVDD3+ 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 MAX6732UTVDD3+ meets industry standards.
7.What is the process for return or replacement of MAX6732UTVDD3+?
All MAX6732UTVDD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6732UTVDD3+, 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 MAX6732UTVDD3+ part is unused and in its original packaging.
Return procedure for MAX6732UTVDD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6732UTVDD3+ Tags
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MIC826SYMT-TR
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