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Analog Devices Inc./Maxim Integrated MAX6730UTSD3+T
- Part No.:
- MAX6730UTSD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730UTSD3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,120
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Product details
Overview
MAX6730UTSD3+T from Maxim Integrated is a single-voltage microprocessor supervisor IC with active-low open-drain reset output, factory-set 4.625V VCC1 reset threshold, 140ms–280ms reset timeout (D3), watchdog timer with 54s startup delay and 1.68s normal timeout, and manual reset input - designed for reliable power-on reset and brownout detection in embedded systems.
For engineers reviewing the MAX6730UTSD3+T datasheet, MAX6730UTSD3+T pinout, MAX6730UTSD3+T application, or MAX6730UTSD3+T equivalent, this page delivers verified electrical parameters, SOT23-6 package details, confirmed watchdog timing behavior, reset threshold hysteresis, supply current at +3.3V, and validated alternative options for single-supply μP supervision.
Technical Context
The MAX6730UTSD3+T integrates a precision voltage monitor for VCC1 only (no VCC2 or RSTIN support), a manual reset input with internal 50kΩ pullup, and a dual-mode watchdog timer that starts in 54s initial mode after reset and transitions to 1.68s normal mode upon first WDI edge detection. Its open-drain RST output requires an external pullup resistor and remains asserted for ≥140ms after VCC1 exceeds 4.625V.
It operates across -40°C to +85°C, draws 15μA typical supply current at +3.6V, guarantees valid reset down to VCC1 = +0.8V, and features immunity to short VCC transients via built-in glitch rejection - all implemented in a 6-pin SOT23 package with BiCMOS process technology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-set, falling edge; ensures reset assertion before critical logic voltage collapse) |
| Reset Timeout Period | 140ms min / 280ms max (D3 suffix; defines minimum system initialization window before release) |
| Watchdog Timeout | 54s startup delay, then 1.68s normal mode (prevents premature lockup detection during boot) |
| Supply Current | 15μA typ at +3.6V (enables long battery life in portable applications) |
| Operating Temp Range | -40°C to +85°C (supports industrial and telecom environments) |
| Package | SOT23-6 (2.9mm × 1.6mm footprint; compatible with standard reflow processes) |
| Reset Output Type | Active-low open-drain (requires external pullup; avoids contention with bidirectional μP reset pins) |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant lead(Pb)-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low reset output | Open-drain driver; asserts low on VCC1 undervoltage, MR low, or watchdog timeout; requires external pullup |
| GND | Ground reference | Common return path for all internal circuits and comparator references |
| WDO | Active-low watchdog output | Open-drain; asserts low if no WDI transition occurs within timeout period |
| VCC1 | Primary supply input | Powers device and feeds primary reset comparator; monitored at 4.625V threshold |
| WDI | Watchdog input | Edge-sensitive; clears watchdog timer on rising/falling transition; unconnected defaults to watchdog enable |
| MR | Active-low manual reset input | Internal 50kΩ pullup to VCC1; drives RST low when asserted; 1µs minimum pulse width |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 4.625V VCC1 threshold | Eliminates external resistor divider; ensures precise reset point for +5V or +3.3V rails |
| Dual-mode watchdog timer | 54s startup delay enables full system boot; 1.68s normal mode detects runtime hangs |
| Manual reset with internal pullup | Reduces BOM count; supports momentary switch interface without external components |
| Immunity to short VCC transients | Rejects sub-100ns glitches; prevents spurious resets during noisy power sequencing |
| Guaranteed operation down to VCC1 = +0.8V | Maintains valid reset state during deep brownout conditions before complete power loss |
Applications
| Industrial PLC Control | Telecom Line Card |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller monitoring +5V and +3.3V rails in factory automation cabinets. IC Role / Device Role / Timing Role: Single-supply supervisor ensuring clean power-on reset and detecting brownout on primary VCC1 rail. Use Value: Prevents erratic I/O behavior during unstable AC/DC converter startup by holding μP in reset until VCC1 stabilizes above 4.625V for ≥140ms. | Use Scenario: Embedded processor on telecom line card requiring reliable reset during hot-swap insertion and power cycling. IC Role / Device Role / Timing Role: Voltage monitor and watchdog enforcer for main system processor with manual reset capability. Use Value: Guarantees reset validity down to VCC1 = +0.8V and provides 54s watchdog startup window to accommodate FPGA configuration time. |
| Medical Diagnostic Handheld | Automotive Infotainment Module |
Use Scenario: Battery-powered ultrasound device with low-power ARM core and analog front-end. IC Role / Device Role / Timing Role: Low-current (15μA) supervisor managing power-on sequence and detecting Li-ion battery sag below 4.625V. Use Value: Extends battery runtime while ensuring deterministic reset behavior during intermittent power interruptions. | Use Scenario: Infotainment head unit with multiple voltage domains where primary supply must be validated before boot. IC Role / Device Role / Timing Role: Single-rail supervisor verifying +5V system rail integrity before enabling application processor. Use Value: Meets automotive cold-crank requirements with guaranteed reset assertion down to VCC1 = +0.8V and transient immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR29D3+T | Fixed 2.93V reset threshold; no watchdog or manual reset; 140ms timeout; same SOT23-6 package | Only suitable for lower-voltage rails; lacks system-level fault recovery features | Select when only basic reset generation is needed and VCC1 ≈ +3.3V |
| TPS3808G33DBVR | 3.3V fixed threshold; push-pull RST; 200ms timeout; 1.6μA quiescent current; SOT23-6 | No watchdog or MR; optimized for ultra-low-power applications | Prefer for battery-critical designs where watchdog functionality is handled externally |
Compared with MAX6730UTSD3+T, MAX6326UR29D3+T omits watchdog and manual reset but offers tighter threshold accuracy for 2.93V rails, while TPS3808G33DBVR reduces supply current by 90% but sacrifices fault-detection depth and system recovery autonomy.
Availability
MAX6730UTSD3+T is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure equipment, and portable medical devices requiring stable component supply, long-lifecycle support, and guaranteed reset timing under brownout conditions.
Supply support for MAX6730UTSD3+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 power, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX6730–MAX6735 family targets cost-sensitive, space-constrained embedded systems needing integrated voltage monitoring, watchdog protection, and manual reset - with variants optimized for single, dual, or triple-rail supervision.
FAQ
What is the exact reset threshold voltage of the MAX6730UTSD3+T?
The MAX6730UTSD3+T has a factory-set VCC1 reset threshold of 4.625V (typical), with guaranteed range 4.500V to 4.750V at -40°C to +85°C. This value is fixed and cannot be adjusted. The threshold applies to the primary supply input (VCC1) only, as MAX6730 monitors a single voltage rail.
Does the MAX6730UTSD3+T support dual-voltage monitoring?
No, the MAX6730UTSD3+T is a single-voltage supervisor. It monitors only VCC1 with its 4.625V threshold. Dual-voltage monitoring is provided by MAX6732/MAX6733 (VCC1 + VCC2), and triple-voltage by MAX6734/MAX6735 (VCC1 + VCC2 + RSTIN). The "UT" prefix and absence of VCC2 suffix in MAX6730UTSD3+T confirm single-rail operation.
What is the watchdog timeout behavior of the MAX6730UTSD3+T?
The MAX6730UTSD3+T features a dual-mode watchdog: 54s minimum startup delay after reset, followed by 1.68s minimum normal timeout. The timer clears on any WDI edge (rising or falling) and asserts WDO low if no transition occurs within the active timeout window. Leaving WDI unconnected does not disable the function.
Is the reset output of the MAX6730UTSD3+T push-pull or open-drain?
The MAX6730UTSD3+T provides an active-low open-drain RST output, requiring an external pullup resistor to the target logic rail (e.g., 10kΩ to +3.3V). This configuration avoids contention with bidirectional μP reset pins and allows wired-OR reset bus architectures.
What package type and dimensions does the MAX6730UTSD3+T use?
The MAX6730UTSD3+T uses a RoHS-compliant, lead(Pb)-free SOT23-6 package (U6+1 outline), measuring 2.9mm × 1.6mm × 1.1mm. Pin pitch is 0.95mm, and it is qualified for reflow soldering up to +260°C. Land pattern 90-0175 is recommended per Maxim's package documentation.
MAX6730UTSD3+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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.925V
- 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
MAX6730UTSD3+T FAQ
1.How can I place an order for MAX6730UTSD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730UTSD3+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 MAX6730UTSD3+T reliable?
The price and inventory of MAX6730UTSD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730UTSD3+T is usually 5 days.
3.What payment methods are accepted for MAX6730UTSD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730UTSD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730UTSD3+T?
MAX6730UTSD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730UTSD3+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 MAX6730UTSD3+T?
For technical support, including MAX6730UTSD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730UTSD3+T requirements.
6.How does Aetrix verify that MAX6730UTSD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6730UTSD3+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 MAX6730UTSD3+T meets industry standards.
7.What is the process for return or replacement of MAX6730UTSD3+T?
All MAX6730UTSD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730UTSD3+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 MAX6730UTSD3+T part is unused and in its original packaging.
Return procedure for MAX6730UTSD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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