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Analog Devices Inc./Maxim Integrated MAX6732UTZWD3+
- Part No.:
- MAX6732UTZWD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6732UTZWD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,504
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Product details
Overview
MAX6732UTZWD3+ 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, 140–280ms reset timeout (D3), and -40°C to +85°C operation. It monitors two fixed supply rails in embedded systems requiring reliable power-on reset and system lockup protection.
For engineers reviewing the MAX6732UTZWD3+ datasheet, MAX6732UTZWD3+ pinout, MAX6732UTZWD3+ application, or MAX6732UTZWD3+ equivalent, key selection criteria include dual-supply threshold accuracy, open-drain RST/WDO compatibility with legacy μP reset interfaces, immunity to short VCC transients, and low 14μA typical supply current at +3.6V.
Technical Context
The MAX6732UTZWD3+ integrates two independent voltage comparators for VCC1 and VCC2 monitoring, each with 20ppm/°C tempco and 0.5% hysteresis referenced to typical threshold. Its reset logic asserts RST low when either supply falls below its factory-trimmed threshold or after manual reset assertion.
The device implements a dual-mode watchdog timer: 35s minimum startup delay post-reset followed by 1.12s minimum normal-mode timeout. WDI edge detection clears the timer; absence of transitions within timeout asserts active-low open-drain WDO - independent of RST state and compatible with external reset chaining via MR-to-WDO connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +3.075V (factory-trimmed, ±125mV tolerance over temp) |
| VCC2 Threshold | +2.313V (factory-trimmed, ±62.5mV tolerance over temp) |
| Reset Timeout | 140–280ms (D3 option; ensures sufficient hold time for slow-starting peripherals) |
| Supply Current | 14μA typ at +3.6V (enables >10-year battery life in always-on monitoring) |
| Watchdog Startup Delay | 35s min after reset (allows full system initialization before watchdog enforcement) |
| Watchdog Normal Timeout | 1.12s min (detects software hangs within sub-second critical window) |
| Operating Temp | -40°C to +85°C (fully specified for industrial ambient environments) |
| VCC Immunity | Immune to transients <100ns at 100mV overdrive (prevents false resets during switching noise) |
Pinout & Package
MAX6732UTZWD3+ uses a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm) with gull-wing leads, JEDEC MO-178AC compliant, thermal resistance θJA = 230°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Drives low when VCC1/VCC2 undervoltage or MR asserted; requires external pullup for logic-high level |
| GND | Ground reference | Common return path for all internal comparators, timer, and I/O; must be low-impedance |
| WDO | Active-low open-drain watchdog output | Asserts independently of RST; used to trigger system-level recovery or cascade reset to other supervisors |
| VCC1 | Primary supply input | Powers device and feeds primary comparator; nominal +3.075V threshold monitoring |
| WDI | Watchdog input | Edge-sensitive input; rising/falling transitions reset watchdog timer; unconnected = no disable |
| VCC2 | Secondary supply input | Feeds secondary comparator; nominal +2.313V threshold monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Eliminates need for external resistive dividers or precision references for VCC1/VCC2 supervision |
| Independent watchdog output | Enables separate fault escalation paths - e.g., WDO triggers brownout recovery while RST holds μP in reset |
| Factory-trimmed thresholds | Reduces BOM count and layout area vs. adjustable supervisors requiring external components |
| Low 14μA supply current | Minimizes quiescent power draw in battery-backed or energy-harvested systems |
| Transient-immune reset logic | Rejects <100ns VCC glitches, preventing spurious resets during digital switching noise |
Applications
| Industrial PLC Controllers | Network Router Power Management |
|---|---|
Use Scenario: Monitoring +3.3V I/O rail and +2.5V core rail in programmable logic controller CPU modules. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting reset until both rails stabilize post-power-up and detecting brownout on either rail during field operation. Use Value: Prevents corrupted firmware execution due to partial rail collapse, ensuring deterministic boot and runtime reliability in harsh EMI environments. | Use Scenario: Supervising +3.3V PHY interface and +1.8V switch fabric supplies in enterprise-grade Ethernet routers. IC Role / Device Role / Timing Role: Providing synchronized reset release across multiple ASICs and guaranteeing watchdog supervision of control-plane software. Use Value: Enables automatic failover without operator intervention when control software locks up, maintaining network uptime SLA compliance. |
| Medical Diagnostic Imaging Systems | Automated Test Equipment (ATE) |
Use Scenario: Validating +3.0V sensor interface and +2.3V FPGA configuration rails in portable ultrasound units. IC Role / Device Role / Timing Role: Ensuring clean power-on sequencing and continuous watchdog oversight of real-time image processing firmware. Use Value: Meets IEC 62304 Class C safety requirements by eliminating undetected processor lockups that could cause erroneous diagnostic output. | Use Scenario: Monitoring +3.3V DUT power and +2.5V pattern generator supplies in semiconductor ATE handlers. IC Role / Device Role / Timing Role: Generating precise reset timing aligned to test vector loading and enforcing watchdog timeout if test sequence stalls. Use Value: Reduces false test aborts from transient noise while catching genuine firmware hangs, improving test throughput and yield analysis accuracy. |
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 (higher thresholds); same D3 timeout and SOT23-6 package | Suitable for +5V/+3.3V legacy systems instead of +3.3V/+2.5V designs | Select when supervising higher-voltage rails; identical footprint and timing behavior |
| TPS3808G33DBVR | Single-supply only (VDD = +3.3V), push-pull RST, no WDO output, 200ms timeout | Lacks dual-rail monitoring and independent watchdog - requires additional circuitry for equivalent functionality | Choose only if system has single-rail supervision need and can accept reduced fault coverage |
Compared with MAX6732UTLTD3+, the MAX6732UTZWD3+ provides lower VCC1/VCC2 thresholds optimized for modern low-voltage SoCs, while TPS3808G33DBVR offers simpler integration at the cost of losing dual-supply visibility and watchdog independence.
Availability
MAX6732UTZWD3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, medical diagnostic imaging systems, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6732UTZWD3+ 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 industrial, communications, and computing applications, with expertise in power management and reliability-critical supervision.
The MAX6730–MAX6735 family was engineered specifically for μP-based systems needing dual- or triple-rail voltage monitoring with independent watchdog enforcement - targeting applications where system-level fault detection and deterministic reset behavior are non-negotiable.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6732UTZWD3+?
The MAX6732UTZWD3+ has factory-trimmed reset thresholds of +3.075V for VCC1 (TZ suffix) and +2.313V for VCC2 (ZW suffix), with guaranteed tolerances of ±125mV and ±62.5mV respectively over -40°C to +85°C. These values are laser-trimmed during production and do not require external calibration.
Does the MAX6732UTZWD3+ support manual reset functionality?
No, the MAX6732UTZWD3+ does not include a manual reset (MR) input. Per the MAX6732 product designation, it is a dual-voltage supervisor without MR capability - unlike MAX6730/MAX6731/MAX6734/MAX6735 variants. Its reset is triggered solely by VCC1/VCC2 undervoltage or watchdog timeout.
What is the watchdog startup delay and normal timeout period for the MAX6732UTZWD3+?
The MAX6732UTZWD3+ features a 35s minimum watchdog startup delay after any reset event (power-up, brownout, or watchdog timeout), followed by a 1.12s minimum normal-mode timeout period. This dual-mode architecture allows full system initialization before watchdog enforcement begins.
Can the MAX6732UTZWD3+ monitor three supply voltages?
No, the MAX6732UTZWD3+ monitors exactly two fixed supply voltages (VCC1 and VCC2). Triple-voltage monitoring with an adjustable RSTIN input is exclusive to MAX6734/MAX6735 variants. The MAX6732UTZWD3+ lacks the RSTIN pin and associated comparator circuitry.
What package type and footprint does the MAX6732UTZWD3+ use?
The MAX6732UTZWD3+ uses a 6-pin SOT23-6 package (outline MO-178AC) with 2.9mm × 1.6mm body size and gull-wing leads. Its land pattern matches standard JEDEC SOT23-6 footprints, and thermal resistance is θJA = 230°C/W on a 4-layer board per JEDEC JESD51-7.
MAX6732UTZWD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.665V, 2.313V
- 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-6
MAX6732UTZWD3+ FAQ
1.How can I place an order for MAX6732UTZWD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6732UTZWD3+ 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 MAX6732UTZWD3+ reliable?
The price and inventory of MAX6732UTZWD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6732UTZWD3+ is usually 5 days.
3.What payment methods are accepted for MAX6732UTZWD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6732UTZWD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6732UTZWD3+?
MAX6732UTZWD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6732UTZWD3+ 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 MAX6732UTZWD3+?
For technical support, including MAX6732UTZWD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6732UTZWD3+ requirements.
6.How does Aetrix verify that MAX6732UTZWD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6732UTZWD3+ 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 MAX6732UTZWD3+ meets industry standards.
7.What is the process for return or replacement of MAX6732UTZWD3+?
All MAX6732UTZWD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6732UTZWD3+, 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 MAX6732UTZWD3+ part is unused and in its original packaging.
Return procedure for MAX6732UTZWD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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