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Analog Devices Inc./Maxim Integrated MAX6732UTTGD3+T
- Part No.:
- MAX6732UTTGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6732UTTGD3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
MAX6732UTTGD3+T from Maxim Integrated is a dual-voltage microprocessor supervisor IC with active-low open-drain reset and watchdog outputs, factory-set VCC1 = +4.625V and VCC2 = +3.075V thresholds, 140–280ms reset timeout, and -40°C to +85°C operation - used in telecom power monitoring and embedded systems requiring reliable dual-rail supervision.
For engineers reviewing the MAX6732UTTGD3+T datasheet, MAX6732UTTGD3+T pinout, MAX6732UTTGD3+T application, or MAX6732UTTGD3+T equivalent, this page delivers verified electrical specs, SOT23-6 package details, dual-supply reset timing behavior, watchdog startup/normal modes, and real-world substitution guidance for industrial and networking designs.
Technical Context
The MAX6732UTTGD3+T monitors two fixed supply rails (VCC1 and VCC2) using precision internal voltage references and comparator circuitry, asserting RST when either falls below its factory-trimmed threshold. It implements a dual-mode watchdog timer: 35s minimum startup delay after reset, then 1.12s minimum normal timeout on WDI transitions.
Its open-drain RST and WDO outputs require external pullups; MR input includes a 50kΩ internal pullup to VCC1 and supports manual reset initiation with sub-microsecond response. The device guarantees valid reset assertion down to VCC ≥ +0.8V and exhibits immunity to short VCC transients via built-in glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +4.625V (factory-trimmed, ±125mV tolerance) - sets primary rail brownout detection point for +5V systems |
| VCC2 Threshold | +3.075V (factory-trimmed, ±75mV tolerance) - enables secondary rail monitoring for +3.3V I/O or memory supplies |
| Reset Timeout | 140–280ms (D3 option) - ensures sufficient hold time for processor initialization and peripheral settling |
| Watchdog Startup Delay | 35s min after reset - allows full system boot before watchdog enforcement begins |
| Normal Watchdog Timeout | 1.12s min - provides rapid fault detection during runtime without excessive latency |
| Supply Current | 15µA typ at +3.6V - enables low-power always-on supervision in battery-backed or energy-sensitive applications |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded deployments |
Pinout & Package
SOT23-6 package (6-pin, 1.6mm × 2.9mm footprint), surface-mount, RoHS-compliant lead(Pb)-free (+T suffix), thermal resistance θJA = 230°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low reset output | Open-drain output requiring external pullup; asserts low on VCC1/VCC2 undervoltage or MR activation |
| GND | Ground reference | Common return path for all internal comparators, timers, and output drivers |
| WDO | Active-low watchdog output | Open-drain watchdog alert; asserts low if WDI lacks edge within timeout period |
| VCC1 | Primary supply input | Powers device and feeds primary reset comparator; nominal +5V rail monitor input |
| WDI | Watchdog input | Edge-triggered input; rising/falling edges reset watchdog timer; unconnected requires 100kΩ pulldown |
| VCC2 | Secondary supply input | Feeds secondary reset comparator; nominal +3.3V rail monitor input |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Simultaneously supervises VCC1 and VCC2 with independent thresholds - eliminates need for two discrete supervisors |
| Factory-trimmed thresholds | VCC1 = +4.625V / VCC2 = +3.075V (LT suffix) - reduces BOM count and calibration effort in production |
| Dual-mode watchdog timer | 35s startup + 1.12s normal timeout - accommodates long boot sequences while ensuring fast runtime fault detection |
| Guaranteed reset validity | Operates down to VCC = +0.8V - maintains reliable reset assertion during deep brownout conditions |
| Immunity to VCC transients | Rejects <100ns glitches per typical characterization - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Monitoring | Industrial PLC Control |
|---|---|
Use Scenario: Supervising +5V and +3.3V rails in base station power management units where undervoltage must trigger immediate processor reset. IC Role / Device Role / Timing Role: Dual-rail supervisor providing coordinated RST assertion and independent WDO signaling for watchdog-enabled firmware recovery. Use Value: Prevents silent data corruption by guaranteeing reset during simultaneous rail collapse, with 140–280ms timeout matching FPGA configuration windows. | Use Scenario: Monitoring main logic and I/O supply rails in programmable logic controller backplanes exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Fault-detection interface between field power inputs and ARM Cortex-M7 host, with MR support for emergency panel reset. Use Value: Enables deterministic fail-safe behavior across -40°C to +85°C with <15µA quiescent current - extends uptime in uncooled enclosures. |
| Networking Switch Fabric | Medical Diagnostic Equipment |
Use Scenario: Ensuring clean boot of packet-processing ASICs and SerDes PHYs in 10G Ethernet switches with tightly coupled voltage domains. IC Role / Device Role / Timing Role: Dual-threshold supervisor coordinating reset sequencing between core logic (+1.2V) and interface I/O (+3.3V) rails via VCC1/VCC2 inputs. Use Value: Eliminates race conditions during power-up by holding RST until both rails stabilize above their precise LT-specified thresholds. | Use Scenario: Supervising imaging subsystem power rails in portable ultrasound devices where battery voltage sag must not cause undefined MCU states. IC Role / Device Role / Timing Role: Low-current supervisor enabling always-on monitoring of Li-ion backup and main DC-DC outputs with MR support for clinician-initiated reboot. Use Value: Delivers 140–280ms reset pulse width compatible with ARM Cortex-M4 boot ROM requirements while consuming <15µA in standby. |
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+T | Identical pinout, same LT threshold pair (+4.625V/+3.075V), identical D3 timeout - functionally identical part number variant | No functional difference; differs only in ordering suffix convention - both meet same electrical and thermal specs | Select MAX6732UTLTD3+T if sourcing from legacy inventory or distributor stock with alternate marking |
| TPS3808G33DBVR | Single-supply supervisor (monitors only one rail), 3.3V fixed threshold, 200ms timeout, push-pull RST - lacks dual-rail capability and independent WDO | Requires additional supervisor IC for second rail; no dedicated watchdog output - suitable only for single-rail systems | Choose only if design uses only one monitored voltage and can route WDO functionality through GPIO or software |
Compared with MAX6732UTTGD3+T, MAX6732UTLTD3+T offers identical dual-rail supervision and watchdog behavior, while TPS3808G33DBVR provides lower-cost single-rail monitoring but forces redesign for dual-voltage systems and removes hardware watchdog independence.
Availability
MAX6732UTTGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and medical electronics requiring stable component supply with guaranteed -40°C to +85°C operation and RoHS-compliant packaging.
Supply support for MAX6732UTTGD3+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 high-performance analog and mixed-signal ICs for precision sensing, power management, and reliability-critical applications.
The MAX6730–MAX6735 family targets embedded systems needing robust, low-power voltage supervision with integrated watchdog functionality - optimized for space-constrained industrial, networking, and computing platforms.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6732UTTGD3+T?
The MAX6732UTTGD3+T features factory-trimmed reset thresholds: VCC1 = +4.625V (±125mV) and VCC2 = +3.075V (±75mV), corresponding to the "LT" suffix in the MAX6732 product naming convention. These values are specified under falling-edge conditions and guaranteed over the full -40°C to +85°C operating range. The MAX6732UTTGD3+T does not support adjustable thresholds - only fixed dual-rail monitoring.
Does the MAX6732UTTGD3+T include a manual reset input (MR)?
No, the MAX6732UTTGD3+T does not include a manual reset input. Per the MAX6730–MAX6735 selector guide, only MAX6730, MAX6731, MAX6734, and MAX6735 variants feature MR functionality. The MAX6732UTTGD3+T is a dual-supply supervisor without MR - its reset is triggered solely by VCC1/VCC2 undervoltage or watchdog timeout. This simplifies layout but removes operator-initiated reset capability.
What is the watchdog timeout behavior of the MAX6732UTTGD3+T during system startup?
The MAX6732UTTGD3+T implements a dual-mode watchdog timer: after any reset event (power-up, brownout, or watchdog timeout), it enforces a 35-second minimum startup delay before entering normal mode. During this period, WDO remains deasserted regardless of WDI state. Once the first valid WDI edge occurs or the 35s elapses, the watchdog switches to its 1.12s minimum normal timeout. This ensures safe boot completion before watchdog enforcement begins.
What package type and footprint does the MAX6732UTTGD3+T use?
The MAX6732UTTGD3+T uses a 6-pin SOT23 package (outline 21-0058), measuring 1.6mm × 2.9mm with 0.95mm pitch. It is a surface-mount, RoHS-compliant lead(Pb)-free device denoted by the "+T" suffix. The pinout is standardized across MAX6730–MAX6733 variants: Pin 1 = RST, Pin 2 = GND, Pin 3 = WDO, Pin 4 = VCC1, Pin 5 = WDI, Pin 6 = VCC2.
Can the MAX6732UTTGD3+T monitor a third voltage rail?
No, the MAX6732UTTGD3+T cannot monitor a third voltage rail. It is a dual-supply supervisor (VCC1 and VCC2 only) and lacks the RSTIN input required for adjustable third-rail monitoring. That functionality is exclusive to the MAX6734 and MAX6735 variants, which feature an 8-pin SOT23 package and a dedicated high-impedance comparator input referenced to 626mV. For three-rail supervision, the MAX6732UTTGD3+T must be paired with an external supervisor or replaced with MAX6734KAxxx+T.
MAX6732UTTGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.11V, 3.075V
- 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
MAX6732UTTGD3+T FAQ
1.How can I place an order for MAX6732UTTGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6732UTTGD3+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 MAX6732UTTGD3+T reliable?
The price and inventory of MAX6732UTTGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6732UTTGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6732UTTGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6732UTTGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6732UTTGD3+T?
MAX6732UTTGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6732UTTGD3+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 MAX6732UTTGD3+T?
For technical support, including MAX6732UTTGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6732UTTGD3+T requirements.
6.How does Aetrix verify that MAX6732UTTGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6732UTTGD3+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 MAX6732UTTGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6732UTTGD3+T?
All MAX6732UTTGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6732UTTGD3+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 MAX6732UTTGD3+T part is unused and in its original packaging.
Return procedure for MAX6732UTTGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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