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Analog Devices Inc./Maxim Integrated MAX6730AUTTD3+
- Part No.:
- MAX6730AUTTD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730AUTTD3+.pdf
- Description:
- IC SUPERVISOR MPU W/WD SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
MAX6730AUTTD3+ from Maxim Integrated is a single-voltage microprocessor supervisor IC with active-low open-drain reset output, manual reset input, and independent watchdog timer featuring 35s startup delay and 1.12s normal timeout. It monitors VCC1 at +3.075V (factory-set), guarantees valid reset down to VCC1 = +0.8V, draws only 14µA typical supply current, and operates across –40°C to +125°C - used in telecom power sequencing and embedded controller reset management.
For engineers reviewing the MAX6730AUTTD3+ datasheet, MAX6730AUTTD3+ pinout, MAX6730AUTTD3+ application, or MAX6730AUTTD3+ equivalent, this page delivers verified electrical parameters, SOT23-6 package mapping, functional timing behavior, and real-world selection guidance for multivoltage system supervision.
Technical Context
The MAX6730AUTTD3+ implements a dual-mode watchdog timer: a 35s (min) initial timeout after reset enables full system initialization, followed by a 1.12s (min) normal mode for rapid fault detection. Its reset logic asserts RST low when VCC1 falls below +3.075V (±2.5% over temperature), with 45µs propagation delay and 0.5% hysteresis referenced to threshold.
It features a dedicated manual reset input (MR) with 50kΩ internal pullup, 1µs minimum pulse width, and 100ns glitch rejection; RST remains asserted for 210ms (D3 option) after MR release or VCC1 recovery. The open-drain RST output requires external pullup and sinks ≤3.2mA at VCC1 ≥ +4.5V with VOL ≤ 0.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V (nominal), ±2.5% tolerance over –40°C to +125°C - sets precise brownout detection point for primary supply |
| Reset Timeout Period | 140ms to 280ms (D3 suffix) - ensures sufficient hold time for processor boot and peripheral initialization |
| Watchdog Timeout | 35s min startup delay, then 1.12s min normal mode - accommodates long firmware boot sequences before enabling tight supervision |
| Supply Current | 14µA typical at +3.6V - enables use in battery-backed or ultra-low-power systems without compromising supervision integrity |
| Operating Temperature | –40°C to +125°C - fully specified for automotive under-hood, industrial control, and telecom base station environments |
| RST Output Type | Active-low open-drain - allows wired-OR reset bus configuration and voltage-level translation via external pullup |
| MR Input Logic | CMOS-compatible with 0.3×VCC1/0.7×VCC1 thresholds and internal 50kΩ pullup - simplifies pushbutton interface without external components |
Pinout & Package
MAX6730AUTTD3+ is housed in a 6-pin SOT23-6 package (package code 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 < +3.075V, MR low, or watchdog timeout - requires external pullup resistor |
| 2 | GND | Ground reference for all internal comparators, watchdog, and I/O - must be low-impedance connection to system ground plane |
| 3 | WDO | Active-low open-drain watchdog output; asserts if no WDI edge occurs within timeout - independent of RST, supports fault-isolation diagnostics |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC1 at 50kΩ - momentary switch to GND initiates system reset without external bias |
| 5 | WDI | Watchdog input; rising/falling edge clears timer - floating state does not disable watchdog, enabling fail-safe default behavior |
| 6 | VCC1 | Primary supply input and power source; powers internal circuitry and serves as reference for VCC1 monitor - valid operation down to +0.8V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode watchdog timer | 35s startup delay + 1.12s normal timeout - eliminates false resets during boot while ensuring rapid lockup detection in runtime |
| Guaranteed reset validity | Operates and asserts RST down to VCC1 = +0.8V - maintains supervision integrity during deep brownout conditions |
| Immunity to VCC transients | Rejects falling transients ≤10µs at 75mV overdrive - prevents spurious resets from switching noise or load dumps |
| Low quiescent current | 14µA typical at +3.6V - extends battery life in portable equipment and reduces self-heating in sealed enclosures |
| Factory-set precision threshold | +3.075V VCC1 reset with 20ppm/°C tempco - eliminates external resistor network and calibration effort |
Applications
| Telecom Power Sequencing | Industrial PLC Controller Reset |
|---|---|
|
Use Scenario: Supervising +3.3V and +1.8V rails in LTE baseband processor modules during cold start and hot-swap events. IC Role / Device Role / Timing Role: Single-supply supervisor monitoring VCC1 at +3.075V to assert reset until stable; coordinates FPGA and DSP initialization sequence. Use Value: Prevents partial configuration of communication ICs by enforcing 210ms minimum reset hold time aligned with power-good settling. |
Use Scenario: Ensuring deterministic restart of ARM-based PLC controllers after AC line interruption or ESD event. IC Role / Device Role / Timing Role: Provides MR-initiated reset and watchdog supervision of main CPU clock domain via WDI/WDO pins. Use Value: Eliminates need for discrete RC reset circuits while supporting both manual and autonomous recovery paths. |
| Embedded Medical Sensor Hub | Automotive Body Control Module |
|
Use Scenario: Managing reset timing for low-power sensor fusion SoCs in portable diagnostic devices with coin-cell backup. IC Role / Device Role / Timing Role: Monitors primary VDD rail and asserts open-drain RST to shared reset bus; leverages 14µA supply current for extended standby. Use Value: Enables >5-year shelf life in battery-operated units by minimizing supervisory leakage without sacrificing reliability. |
Use Scenario: Supervising microcontroller supply in door module ECUs exposed to load-dump transients and wide ambient temperature swings. IC Role / Device Role / Timing Role: Guarantees reset assertion down to VCC1 = +0.8V and rejects sub-10µs VCC glitches per ISO 7637-2 Pulse 4. Use Value: Meets AEC-Q100 Grade 0 requirements for under-hood operation without additional transient protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR29D3+ | Single-voltage supervisor with +2.93V threshold, 200ms timeout, push-pull RST, no watchdog or MR | Lacks manual reset and watchdog - suitable only for basic power-on reset where autonomous supervision is unnecessary | Select when system uses external watchdog or software reset only, and board layout favors push-pull drive without pullup resistor |
| TPS3808G33DBVR | +3.3V threshold, 200ms timeout, open-drain RST, no MR, no independent WDO, 1.6µA supply current | Lower IQ but no manual reset or separate watchdog output - limits fault-diagnostic capability in field-deployed systems | Prefer for ultra-low-power battery applications where MR and watchdog isolation are secondary to current budget |
Compared with MAX6730AUTTD3+, MAX6326UR29D3+ offers push-pull simplicity but removes critical watchdog autonomy, while TPS3808G33DBVR achieves lower IQ at the cost of diagnostic visibility and manual intervention capability - MAX6730AUTTD3+ uniquely balances precision supervision, serviceability, and robustness in harsh environments.
Availability
MAX6730AUTTD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6730AUTTD3+ 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 - known for high-reliability supervisors, PMICs, and data converters.
The MAX6730A–MAX6735A family targets multivoltage microprocessor systems needing coordinated reset, manual intervention, and independent watchdog supervision - engineered for fail-safe operation in mission-critical embedded control.
FAQ
What is the exact reset threshold voltage for MAX6730AUTTD3+?
The MAX6730AUTTD3+ has a factory-set VCC1 reset threshold of +3.075V (nominal), with guaranteed tolerance of ±2.5% over the full –40°C to +125°C operating range and 20ppm/°C temperature coefficient. This value is fixed by the 'T' suffix in the part number and confirmed in Table 1 of the MAX6730A–MAX6735A datasheet.
Does MAX6730AUTTD3+ include a manual reset input?
Yes, MAX6730AUTTD3+ includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. It accepts CMOS logic levels, requires a minimum 1µs pulse width, and rejects glitches shorter than 100ns - enabling direct connection to a momentary switch without external components.
What is the reset timeout period for MAX6730AUTTD3+?
The MAX6730AUTTD3+ uses the D3 timeout suffix, providing a nominal reset timeout period of 210ms, with guaranteed minimum of 140ms and maximum of 280ms across temperature and voltage. This duration ensures reliable processor and peripheral initialization before releasing the reset signal.
How does the watchdog timer operate in MAX6730AUTTD3+?
The MAX6730AUTTD3+ watchdog features dual-mode timing: a 35s (min) startup delay after reset to allow full system boot, then automatic transition to 1.12s (min) normal timeout. WDI edges clear the timer; absence of edges asserts WDO low. Floating WDI does not disable the function.
What package type and pin count does MAX6730AUTTD3+ use?
MAX6730AUTTD3+ is packaged in a 6-pin SOT23-6 (U6-1) outline, with gull-wing leads and lead-free finish. Pinout is standardized across MAX6730A/MAX6731A variants: Pin 1 = RST, Pin 2 = GND, Pin 3 = WDO, Pin 4 = MR, Pin 5 = WDI, Pin 6 = VCC1.
MAX6730AUTTD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.075V
- 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
MAX6730AUTTD3+ FAQ
1.How can I place an order for MAX6730AUTTD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730AUTTD3+ 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 MAX6730AUTTD3+ reliable?
The price and inventory of MAX6730AUTTD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730AUTTD3+ is usually 5 days.
3.What payment methods are accepted for MAX6730AUTTD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730AUTTD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730AUTTD3+?
MAX6730AUTTD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730AUTTD3+ 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 MAX6730AUTTD3+?
For technical support, including MAX6730AUTTD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730AUTTD3+ requirements.
6.How does Aetrix verify that MAX6730AUTTD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6730AUTTD3+ 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 MAX6730AUTTD3+ meets industry standards.
7.What is the process for return or replacement of MAX6730AUTTD3+?
All MAX6730AUTTD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730AUTTD3+, 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 MAX6730AUTTD3+ part is unused and in its original packaging.
Return procedure for MAX6730AUTTD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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