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Analog Devices Inc./Maxim Integrated MAX6732AUTLTD1+T
- Part No.:
- MAX6732AUTLTD1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6732AUTLTD1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6732AUTLTD1+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, 1.1ms minimum reset timeout, and -40°C to +125°C operation. It monitors two fixed supply rails in embedded systems requiring reliable power-on reset and lockup protection.
For engineers reviewing the MAX6732AUTLTD1+T datasheet, MAX6732AUTLTD1+T pinout, MAX6732AUTLTD1+T application, or MAX6732AUTLTD1+T equivalent, this device delivers deterministic reset assertion during brownout, manual reset initiation, independent watchdog supervision with 35s startup delay and 1.12s normal timeout, and guaranteed reset validity down to VCC ≥ +0.8V - critical for low-voltage industrial and telecom power sequencing.
Technical Context
The MAX6732AUTLTD1+T implements dual independent voltage comparators with ±1.5% threshold accuracy over temperature, hysteresis of 0.5% of VTH, and 45µs VCC-to-RST propagation delay. Its watchdog timer features dual-mode timing: a 35s (min) initial startup period after reset, followed by a 1.12s (min) normal timeout triggered by WDI edge detection.
This device uses BiCMOS process technology (1073 transistors), draws only 14µA typical supply current at +3.6V, and guarantees functional reset output down to VCC1 or VCC2 = +0.8V - enabling robust operation in deep-brownout conditions common in battery-backed and automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +4.625V nominal (LT suffix), ±1.5% tolerance over -40°C to +125°C - ensures precise primary rail monitoring for +5V logic domains |
| VCC2 Threshold | +3.075V nominal (LT suffix), ±1.5% tolerance - matches standard +3.3V I/O supply with margin for ripple and drift |
| Reset Timeout | 1.1ms minimum (D1 suffix) - provides fast system recovery while avoiding false triggers from brief transients |
| Watchdog Timeout | 35s min initial period, 1.12s min normal period - accommodates long boot sequences then enforces tight software execution checks |
| Supply Current | 14µA typical at +3.6V - enables use in always-on, low-power monitoring circuits without burdening supply rails |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom base station environments |
| Reset Output Type | Active-low open-drain (RST) - allows wired-OR configuration with other reset sources and flexible pull-up voltage selection |
Pinout & Package
MAX6732AUTLTD1+T is housed in a 6-pin SOT23-6 package (U6-1), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free finish (+T suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserts when VCC1 < +4.625V, VCC2 < +3.075V, or MR pulled low; requires external pullup |
| 2 | GND | Analog/digital ground reference for all internal comparators, watchdog, and I/O circuitry |
| 3 | WDO | Active-low open-drain watchdog output; asserts if no WDI edge occurs within 1.12s (normal mode) or 35s (startup mode) |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); drives RST low when asserted |
| 5 | WDI | Watchdog input; rising or falling edge clears watchdog timer; floating state does not disable watchdog function |
| 6 | VCC1 | Primary supply input; powers device and feeds VCC1 comparator; must be ≥ +0.8V for valid reset operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual fixed-voltage monitoring | Simultaneously supervises +4.625V (VCC1) and +3.075V (VCC2) rails with independent comparators and hysteresis |
| Independent watchdog output | Separate WDO pin enables system-level fault isolation - watchdog timeout does not require RST assertion |
| Guaranteed reset down to +0.8V | Ensures valid reset signaling even during severe brownout, eliminating need for external undervoltage lockout circuitry |
| Immunity to short VCC transients | Rejects glitches ≤10µs (at 75mV overdrive) - prevents spurious resets in noisy power environments |
| Low quiescent current | 14µA typical ICC1 at +3.6V enables integration into battery-backed or energy-harvesting systems |
Applications
| Telecom Line Cards | Industrial PLC Controllers |
|---|---|
Use Scenario: Monitoring +48V DC-DC derived +5V and +3.3V rails powering FPGA, PHY, and management MCU on carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting coordinated reset across multiple ASICs and ensuring watchdog recovery from firmware hangs during packet processing. Use Value: Prevents silent data corruption by guaranteeing clean reset before reinitializing SERDES links and memory controllers after brownout. |
Use Scenario: Supervising +5V logic and +3.3V I/O supplies in DIN-rail mounted programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Providing fail-safe reset coordination between main CPU, isolated I/O modules, and real-time Ethernet MACs during AC line sags. Use Value: Eliminates need for discrete RC reset circuits and external watchdog timers, reducing BOM count and board area by >40%. |
| Automotive ADAS Camera Modules | Network Attached Storage (NAS) Power Management |
Use Scenario: Monitoring camera SoC core (+1.2V) and interface (+3.3V) rails in rear-view and surround-view camera ECUs exposed to engine compartment temperatures. IC Role / Device Role / Timing Role: Enforcing cold-boot reset sequence and detecting processor lockup during image sensor initialization or ISP firmware updates. Use Value: Meets AEC-Q100 Grade 1 requirements via -40°C to +125°C qualification and 1.1ms fast-reset capability for rapid camera restart after vibration-induced power disturbance. |
Use Scenario: Coordinating power-up sequencing and runtime supervision of +5V HDD controller, +3.3V SATA PHY, and +1.8V SoC rails in multi-bay NAS enclosures. IC Role / Device Role / Timing Role: Generating synchronized reset pulse across storage controller, bridge ICs, and fan controllers while providing independent watchdog oversight of RAID firmware. Use Value: Enables single-chip replacement of legacy discrete supervisor + external watchdog, simplifying thermal design and improving MTBF by removing 3 passive components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6732AUTLTD3-T | Same dual-voltage thresholds (+4.625V/+3.075V) but 210ms reset timeout (D3) vs. 1.1ms (D1) | Suitable for systems requiring longer reset hold time to ensure complete peripheral initialization | Select when longer reset assertion is needed for complex SoC boot; otherwise MAX6732AUTLTD1+T preferred for fast-recovery designs |
| TPS3808G18DBVR | Single-supply monitor (+1.8V threshold), no manual reset, push-pull RST, 200ms timeout, 2.5µA IQ | Limited to single-rail applications; lacks dual-monitoring and MR functionality of MAX6732AUTLTD1+T | Use only if monitoring one rail suffices and ultra-low current (<3µA) is prioritized over dual-rail coverage and manual reset |
Compared with MAX6732AUTLTD3-T, the MAX6732AUTLTD1+T offers 190× faster reset release for responsive recovery; versus TPS3808G18DBVR, it provides essential dual-rail supervision and manual reset - making it irreplaceable in multivoltage embedded systems requiring coordinated power integrity.
Availability
MAX6732AUTLTD1+T is available at Aetrix Electronics and suitable for telecom line cards, industrial PLC controllers, and automotive ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6732AUTLTD1+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6730A–MAX6735A family was designed specifically for multivoltage microprocessor-based systems needing simultaneous rail monitoring, deterministic reset timing, and independent watchdog supervision - targeting reliability-critical infrastructure equipment.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6732AUTLTD1+T?
The MAX6732AUTLTD1+T has factory-set thresholds of +4.625V for VCC1 and +3.075V for VCC2, indicated by the "LT" suffix per Maxim's Reset Voltage Threshold Suffix Guide. These values are specified with ±1.5% tolerance over the full -40°C to +125°C temperature range, and include 0.5% hysteresis referenced to typical threshold.
Does the MAX6732AUTLTD1+T support manual reset functionality?
Yes, the MAX6732AUTLTD1+T includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Driving MR low forces RST assertion for the duration of the low signal plus the full 1.1ms reset timeout period. This feature is confirmed in the Selector Guide and Pin Description sections of the official datasheet.
What is the watchdog timeout behavior of the MAX6732AUTLTD1+T during power-up?
The MAX6732AUTLTD1+T implements a dual-mode watchdog timer: after any reset event (power-up, brownout, or MR assertion), it enters a 35s minimum startup mode to allow full system initialization, then transitions to a 1.12s minimum normal timeout mode upon the first valid WDI edge. This behavior is explicitly defined in the Electrical Characteristics table and Detailed Description section.
Is the reset output of the MAX6732AUTLTD1+T push-pull or open-drain?
The MAX6732AUTLTD1+T features an active-low open-drain RST output, as confirmed by the Selector Guide (listing "Open Drain" under RST OUTPUT for MAX6732A) and Pin Description (stating "The MAX6730A/MAX6732A/MAX6734A provide an open-drain output"). An external pullup resistor is required for proper logic-level translation.
What package type and dimensions does the MAX6732AUTLTD1+T use?
The MAX6732AUTLTD1+T is packaged in a 6-pin SOT23-6 (U6-1) outline, with body dimensions of 2.9mm × 1.6mm × 1.1mm and gull-wing leads. This is verified in the Ordering Information table and Package Information section, and the "+T" suffix confirms lead-free RoHS-compliant finish.
MAX6732AUTLTD1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.075V, 4.625V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6732AUTLTD1+T FAQ
1.How can I place an order for MAX6732AUTLTD1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6732AUTLTD1+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 MAX6732AUTLTD1+T reliable?
The price and inventory of MAX6732AUTLTD1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6732AUTLTD1+T is usually 5 days.
3.What payment methods are accepted for MAX6732AUTLTD1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6732AUTLTD1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6732AUTLTD1+T?
MAX6732AUTLTD1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6732AUTLTD1+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 MAX6732AUTLTD1+T?
For technical support, including MAX6732AUTLTD1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6732AUTLTD1+T requirements.
6.How does Aetrix verify that MAX6732AUTLTD1+T is sourced from the original manufacturer or authorized distributors?
All MAX6732AUTLTD1+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 MAX6732AUTLTD1+T meets industry standards.
7.What is the process for return or replacement of MAX6732AUTLTD1+T?
All MAX6732AUTLTD1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6732AUTLTD1+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 MAX6732AUTLTD1+T part is unused and in its original packaging.
Return procedure for MAX6732AUTLTD1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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