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Analog Devices Inc./Maxim Integrated MAX6732AUTWGD3+
- Part No.:
- MAX6732AUTWGD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6732AUTWGD3+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,134
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Product details
Overview
MAX6732AUTWGD3+ from Maxim Integrated is a dual-voltage microprocessor supervisor IC with active-low open-drain reset output, independent watchdog timer, and factory-set VCC1/VCC2 reset thresholds of +3.075V and +1.665V. It monitors two fixed supply rails in embedded systems, asserts reset for ≥140ms after undervoltage detection, and operates across –40°C to +125°C. Used in telecom power sequencing and industrial controllers where reliable brownout detection and watchdog supervision are critical.
For engineers reviewing the MAX6732AUTWGD3+ datasheet, MAX6732AUTWGD3+ pinout, MAX6732AUTWGD3+ application, or MAX6732AUTWGD3+ equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), 14µA typical supply current at +3.6V, immunity to sub-100ns VCC transients, and compatibility with manual reset and watchdog timeout configuration via suffix coding.
Technical Context
The MAX6732AUTWGD3+ implements dual independent voltage comparators with internal 20ppm/°C tempco references, each feeding a digital reset timer that restarts on any threshold violation. Its watchdog circuit features dual-mode timing: a 35s minimum startup delay after reset assertion followed by 1.12s minimum normal-mode timeout, triggered by WDI edge transitions.
Reset assertion requires VCC1 or VCC2 to fall below their factory-set thresholds (+3.075V and +1.665V respectively); reset remains asserted for the D3-specified 140–280ms timeout period. The open-drain RST output guarantees valid low-state operation down to VCC = +0.8V, and the WDO output mirrors the same open-drain architecture with independent timeout control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V nominal, ±1.5% tolerance over –40°C to +125°C - ensures precise brownout detection for 3.3V system rails |
| VCC2 Reset Threshold | +1.665V nominal, ±1.5% tolerance - enables accurate monitoring of 1.8V or 1.6V core supplies |
| Reset Timeout Period | 140–280ms (D3 suffix) - provides sufficient hold time for processor initialization without excessive boot delay |
| Supply Current | 14µA typical at +3.6V - supports ultra-low-power battery-backed applications and reduces thermal load |
| Watchdog Timeout | 35s min startup delay, 1.12s min normal mode - accommodates lengthy firmware boot sequences then enforces rapid fault recovery |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and telecom base station environments |
| Reset Output Type | Active-low open-drain - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
Pinout & Package
MAX6732AUTWGD3+ is housed in a 6-pin SOT23-6 package (pkg code U6-1), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free plating (indicated by '+' suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserts when VCC1 < +3.075V, VCC2 < +1.665V, or during watchdog timeout; requires external pullup |
| 2 | GND | Analog/digital ground reference for all comparators, timers, and I/O; must be low-impedance connection to system ground plane |
| 3 | WDO | Active-low open-drain watchdog output; asserts independently of RST when WDI lacks edge transition for >1.12s (normal mode) |
| 4 | MR | Not present - MAX6732A variant excludes manual reset input per selector guide; pin 4 is NC |
| 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; threshold set to +3.075V for this part number |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-set voltage monitoring | Simultaneous +3.075V and +1.665V thresholds eliminate external resistor dividers and reduce BOM count |
| Independent watchdog output (WDO) | Enables separate fault signaling to watchdog-aware peripherals without interfering with main reset bus |
| Immunity to short VCC transients | Rejects glitches ≤100ns duration (per Typical Operating Characteristics), preventing spurious resets during switching noise |
| Guaranteed reset validity down to VCC = +0.8V | Ensures clean reset assertion even during deep brownout conditions before full power collapse |
| Low 14µA supply current | Minimizes quiescent drain on backup batteries or energy-harvesting sources in always-on monitoring applications |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Sequencing multiple DC-DC rails (e.g., +3.3V, +1.8V) in 5G baseband units with strict ramp-up timing requirements. IC Role / Device Role / Timing Role: Dual-threshold supervisor ensures both rails stabilize above their respective thresholds before releasing reset to FPGA and DSP. Use Value: Prevents logic lockup from partial power-up; 140–280ms D3 timeout aligns with typical DC-DC soft-start durations. |
Use Scenario: Monitoring redundant 24V DC input and isolated 5V logic rail in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Acts as primary system-level health monitor, asserting reset if either rail drops below specification during field operation. Use Value: 1.665V VCC2 threshold matches common isolated 1.8V logic supplies; –40°C to +125°C rating supports uncooled cabinet deployment. |
| Automotive Infotainment Head Unit | Medical Diagnostic Imaging Module |
Use Scenario: Supervising +5V USB interface rail and +1.2V SoC core rail in vehicle infotainment systems exposed to cold-crank voltage dips. IC Role / Device Role / Timing Role: Detects undervoltage on either rail and holds processor in reset until both recover, preventing corrupted firmware execution. Use Value: Immunity to sub-100ns transients rejects alternator ripple noise; open-drain RST allows shared reset bus with other safety-critical ICs. |
Use Scenario: Ensuring deterministic boot sequence for FPGA-based image processing subsystems in portable ultrasound devices. IC Role / Device Role / Timing Role: Provides fail-safe reset coordination between high-speed ADCs, memory controllers, and display drivers during power-on. Use Value: 14µA supply current extends battery life in handheld diagnostic tools; D3 timeout prevents premature release before FPGA configuration completes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6733AUTWGD3+ | Push-pull RST output instead of open-drain; identical VCC1/VCC2 thresholds and D3 timeout | Requires no external pullup; unsuitable for wired-OR reset buses but simplifies interface to CMOS inputs | Select when driving single-load reset pins directly and board space prohibits pullup resistors |
| TPS3808G33DBVR | Single-supply supervisor (+3.3V threshold only); no VCC2 monitor; 200ms fixed timeout; 2.5µA supply current | Lacks dual-rail capability; lower quiescent current but cannot replace dual-monitoring function | Use only if system has single critical rail and ultra-low power is prioritized over redundancy |
Compared with MAX6732AUTWGD3+, MAX6733AUTWGD3+ offers push-pull drive for simpler point-to-point reset routing, while TPS3808G33DBVR trades dual monitoring for significantly lower supply current-making it suitable only for single-rail designs where cost and power dominate over fault coverage.
Availability
MAX6732AUTWGD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive electronics requiring stable component supply with guaranteed long-term availability and extended temperature support.
Supply support for MAX6732AUTWGD3+ 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, emphasizing reliability, integration, and wide-temperature performance.
The MAX6730A–MAX6735A family was engineered specifically for multivoltage microprocessor systems needing simultaneous rail monitoring, robust watchdog supervision, and minimal external components in space-constrained designs.
FAQ
What are the exact reset threshold voltages for MAX6732AUTWGD3+?
The MAX6732AUTWGD3+ has factory-set VCC1 and VCC2 reset thresholds of +3.075V and +1.665V respectively, as defined by the 'TW' suffix in its part number per Table 1 of the datasheet. These values are specified with ±1.5% tolerance over the full –40°C to +125°C operating range and include 20ppm/°C tempco for stability across temperature gradients.
Does MAX6732AUTWGD3+ support manual reset functionality?
No, MAX6732AUTWGD3+ does not include a manual reset (MR) input. Per the Selector Guide and Pin Description table, MR is absent on MAX6732A/MAX6733A variants - pin 4 is no-connect. Manual reset is only available on MAX6730A, MAX6731A, MAX6734A, and MAX6735A devices.
What is the watchdog timeout behavior of MAX6732AUTWGD3+ during power-up?
Upon power-up or reset assertion, MAX6732AUTWGD3+ enters a 35s minimum initial watchdog timeout period (tWD-L) to allow full system initialization. After this period expires or after the first valid WDI edge transition, it switches to the shorter 1.12s minimum normal-mode timeout (tWD-S), which remains active until the next reset event.
Can MAX6732AUTWGD3+ monitor a third voltage rail?
No, MAX6732AUTWGD3+ is a dual-voltage supervisor and lacks the RSTIN pin required for adjustable third-rail monitoring. Only MAX6734A and MAX6735A variants include the RSTIN input; MAX6732AUTWGD3+ is limited to VCC1 and VCC2 monitoring per its functional description and pinout.
What package type and dimensions does MAX6732AUTWGD3+ use?
MAX6732AUTWGD3+ uses a 6-pin SOT23-6 package (pkg code U6-1), with body dimensions of 2.9mm × 1.6mm × 1.1mm and gull-wing leads. The '+' in the part number confirms lead-free RoHS-compliant termination, and the device is fully specified from –40°C to +125°C.
MAX6732AUTWGD3+ 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:
- 1.11V, 1.665V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6732AUTWGD3+ FAQ
1.How can I place an order for MAX6732AUTWGD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6732AUTWGD3+ 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 MAX6732AUTWGD3+ reliable?
The price and inventory of MAX6732AUTWGD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6732AUTWGD3+ is usually 5 days.
3.What payment methods are accepted for MAX6732AUTWGD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6732AUTWGD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6732AUTWGD3+?
MAX6732AUTWGD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6732AUTWGD3+ 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 MAX6732AUTWGD3+?
For technical support, including MAX6732AUTWGD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6732AUTWGD3+ requirements.
6.How does Aetrix verify that MAX6732AUTWGD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6732AUTWGD3+ 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 MAX6732AUTWGD3+ meets industry standards.
7.What is the process for return or replacement of MAX6732AUTWGD3+?
All MAX6732AUTWGD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6732AUTWGD3+, 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 MAX6732AUTWGD3+ part is unused and in its original packaging.
Return procedure for MAX6732AUTWGD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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