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Analog Devices Inc./Maxim Integrated MAX6730UTVD3-T
- Part No.:
- MAX6730UTVD3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730UTVD3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6730UTVD3-T from Maxim Integrated is a single-voltage microprocessor supervisory IC with factory-set +3.075V VCC1 reset threshold, 140ms–280ms reset timeout, active-low open-drain reset output, and independent watchdog timer featuring 35s startup delay and 1.12s normal timeout. It monitors primary supply voltage in embedded systems requiring reliable power-on reset and lockup protection.
For engineers reviewing the MAX6730UTVD3-T datasheet, MAX6730UTVD3-T pinout, MAX6730UTVD3-T application, or MAX6730UTVD3-T equivalent, this page delivers verified specifications, SOT23-6 package details, watchdog timing behavior, manual reset integration, and validated alternative options for multivoltage system supervision.
Technical Context
The MAX6730UTVD3-T implements dual-mode watchdog logic: a 35s minimum initial timeout after reset enables full system initialization, followed by a 1.12s minimum normal timeout for rapid fault detection during runtime. Its reset circuitry guarantees valid RST assertion down to VCC1 = +0.8V and features hysteresis (0.5%) and immunity to sub-100ns VCC transients.
This variant monitors only VCC1 (no VCC2 or RSTIN inputs), uses an internal 50kΩ MR pullup, and asserts reset when VCC1 falls below +3.075V (±125mV over temperature). The open-drain RST output requires external pullup and supports bidirectional µP reset pins without contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V (nominal), ±125mV tolerance over -40°C to +85°C - ensures precise brownout detection for 3.3V systems |
| Reset Timeout Period | 140ms–280ms (D3 suffix) - provides sufficient hold time for slow-starting processors and peripherals |
| Watchdog Startup Delay | 35s (min) after reset - allows complete boot sequence before watchdog monitoring begins |
| Normal Watchdog Timeout | 1.12s (min) - detects software hangs within sub-second window during active operation |
| Supply Current | 14µA (typ) at +3.6V - enables long battery life in portable equipment |
| RST Output Type | Active-low open-drain - compatible with bidirectional µP reset I/O and flexible voltage-level translation |
| Manual Reset Input | MR with 50kΩ internal pullup to VCC1 - simplifies pushbutton interface with no external components required |
Pinout & Package
MAX6730UTVD3-T is housed in a 6-pin SOT23-6 package (U6-1 outline), measuring 2.9mm × 1.6mm × 1.1mm, suitable for space-constrained PCB layouts and reflow-compatible with standard lead-free processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Open-drain driver requiring external pullup; asserts low on VCC1 undervoltage or MR activation |
| 2 - GND | Ground reference | Common return path for all internal circuits and external bypass capacitors |
| 3 - WDO | Active-low watchdog output | Open-drain output asserting low if WDI lacks edge transitions within timeout period |
| 4 - MR | Active-low manual reset input | Internally pulled up to VCC1; drives RST low when grounded, enabling hardware-initiated reset |
| 5 - WDI | Watchdog input | Edge-sensitive input; each rising/falling transition resets watchdog timer; unconnected = functional |
| 6 - VCC1 | Primary supply input | Power source and monitored voltage rail; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set VCC1 threshold | +3.075V (T-suffix) eliminates external resistor network and calibration effort |
| Dual-mode watchdog timer | 35s startup + 1.12s normal timeout prevents false triggers during boot while ensuring fast hang detection |
| Guaranteed reset validity | RST remains functional down to VCC1 = +0.8V - supports graceful shutdown during deep brownout |
| Immunity to VCC transients | Rejects falling glitches <100ns wide - avoids spurious resets in noisy power environments |
| Low quiescent current | 14µA typical at +3.6V - extends battery life in always-on monitoring applications |
Applications
| Industrial PLC Controllers | Network Router Power Management |
|---|---|
|
Use Scenario: Monitoring 3.3V main supply in programmable logic controllers operating in harsh industrial environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Single-rail supervisor providing power-on reset, brownout detection, and watchdog-triggered recovery for ARM-based control CPUs. Use Value: Ensures deterministic boot and automatic recovery from firmware crashes without operator intervention, meeting IEC 61131-2 reliability requirements. |
Use Scenario: Supervising primary 3.3V rail in multi-core network routers where processor lockup must be detected within 1.2 seconds to maintain packet forwarding continuity. IC Role / Device Role / Timing Role: Dedicated µP supervisor delivering guaranteed reset assertion and independent watchdog output tied to system watchdog controller. Use Value: Prevents silent data corruption by forcing hard reset when CPU fails to service WDI, maintaining uptime SLA for carrier-grade infrastructure. |
| Medical Diagnostic Handhelds | POS Terminal Boot Integrity |
|
Use Scenario: Power sequencing and reset assurance in battery-powered ultrasound handhelds requiring FDA-compliant fault response and low-power operation. IC Role / Device Role / Timing Role: Primary voltage monitor with ultra-low ICC (14µA) and robust reset timing for Cortex-M4 host MCU. Use Value: Extends single-charge battery life beyond 8 hours while guaranteeing safe shutdown and restart on supply droop below 3.075V. |
Use Scenario: Securing boot integrity in retail point-of-sale terminals exposed to frequent power cycling and accidental disconnects. IC Role / Device Role / Timing Role: Single-supply supervisor generating clean reset pulse and supporting pushbutton-initiated diagnostics via MR pin. Use Value: Eliminates corrupted transaction states by enforcing minimum 140ms reset hold time and enabling technician-triggered cold reboot without opening enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR29D3-T | Fixed +2.93V reset threshold, 200ms timeout, same SOT23-6 package, no watchdog output | Lacks independent watchdog timer and WDO pin - suitable only for basic reset-only use cases | Select when watchdog functionality is unnecessary and tighter 2.93V threshold better matches system margin |
| TPS3808G33DBVR | +3.3V reset threshold, 200ms timeout, push-pull RST, integrated watchdog with programmable delay, same 6-pin SOT23 | Push-pull RST requires series resistor for bidirectional µP pins; watchdog delay adjustable via external capacitor | Choose when design flexibility (adjustable timeout) and higher drive strength outweigh need for open-drain compatibility |
Compared with MAX6730UTVD3-T, MAX6326UR29D3-T omits watchdog capability but offers tighter threshold accuracy, while TPS3808G33DBVR provides programmable timing and stronger output drive at the cost of added external component count and different reset polarity handling.
Availability
MAX6730UTVD3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, medical diagnostic handhelds, and POS terminal boot integrity requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6730UTVD3-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 precision analog and mixed-signal ICs for demanding industrial, computing, and communications applications, emphasizing reliability, low power, and integration.
The MAX6730–MAX6735 family targets embedded systems needing multirail supervision with independent watchdog functionality - optimized for space-constrained, battery-sensitive, and high-availability applications.
FAQ
What is the exact reset threshold voltage for MAX6730UTVD3-T?
The MAX6730UTVD3-T has a factory-set VCC1 reset threshold of +3.075V (nominal), with guaranteed limits of +3.000V (min) and +3.150V (max) over the full -40°C to +85°C operating range, as specified in the Electrical Characteristics table under VTH1 parameter with 'T' suffix.
Does MAX6730UTVD3-T support manual reset functionality?
Yes, MAX6730UTVD3-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 full reset timeout period, enabling hardware-initiated system reset using a simple pushbutton switch without external components.
What watchdog timeout periods does MAX6730UTVD3-T provide?
MAX6730UTVD3-T features dual-mode watchdog timing: a minimum 35s startup delay after any reset event (power-up, brownout, or MR activation), followed by a minimum 1.12s normal timeout period that begins after the first valid WDI edge or expiration of the startup delay.
Is MAX6730UTVD3-T compatible with bidirectional microprocessor reset pins?
Yes, MAX6730UTVD3-T's open-drain RST output is inherently compatible with bidirectional µP reset I/O pins. No series resistor is required, unlike push-pull variants, eliminating risk of logic contention during reset assertion or release.
What package type and dimensions does MAX6730UTVD3-T use?
MAX6730UTVD3-T is supplied in a 6-pin SOT23-6 package (package code U6-1), with body dimensions of 2.9mm × 1.6mm × 1.1mm and standard lead-free RoHS-compliant finish. The pinout matches JEDEC MO-178AC outline and supports automated placement and reflow soldering.
MAX6730UTVD3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- 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-23-6
MAX6730UTVD3-T FAQ
1.How can I place an order for MAX6730UTVD3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730UTVD3-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 MAX6730UTVD3-T reliable?
The price and inventory of MAX6730UTVD3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730UTVD3-T is usually 5 days.
3.What payment methods are accepted for MAX6730UTVD3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730UTVD3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730UTVD3-T?
MAX6730UTVD3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730UTVD3-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 MAX6730UTVD3-T?
For technical support, including MAX6730UTVD3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730UTVD3-T requirements.
6.How does Aetrix verify that MAX6730UTVD3-T is sourced from the original manufacturer or authorized distributors?
All MAX6730UTVD3-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 MAX6730UTVD3-T meets industry standards.
7.What is the process for return or replacement of MAX6730UTVD3-T?
All MAX6730UTVD3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730UTVD3-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 MAX6730UTVD3-T part is unused and in its original packaging.
Return procedure for MAX6730UTVD3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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