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Analog Devices Inc./Maxim Integrated MAX6730UTVD3
- Part No.:
- MAX6730UTVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730UTVD3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:291
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Product details
Overview
MAX6730UTVD3 from Maxim Integrated is a single-voltage microprocessor supervisor IC with active-low open-drain reset output, factory-set 3.075V VCC1 reset threshold, 140–280ms reset timeout, and independent watchdog timer featuring 35s startup delay and 1.12s normal timeout. It monitors +3.075V primary supply in embedded systems requiring reliable power-on reset and lockup recovery.
For engineers reviewing the MAX6730UTVD3 datasheet, MAX6730UTVD3 pinout, MAX6730UTVD3 application, or MAX6730UTVD3 equivalent, this page delivers verified circuit role (single-supply µP supervisor), exact reset thresholds, watchdog timing behavior, SOT23-6 package mapping, and two validated alternative parts for multivoltage system design.
Technical Context
The MAX6730UTVD3 implements a dual-mode watchdog timer: a 35s (min) initial startup period enables full system initialization after power-up or brownout, followed by a 1.12s (min) normal timeout period for rapid detection of software hang conditions. Its reset logic asserts RST low when VCC1 drops below 3.075V (±1.5% over temperature), with guaranteed validity down to VCC1 = +0.8V.
It features an internal 50kΩ pullup on MR, supports manual reset via TTL/CMOS-compatible input, and uses BiCMOS process for 14µA typical supply current at +3.6V. The open-drain RST output requires external pullup and remains functional across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 3.075V (nominal), ±1.5% over –40°C to +85°C - ensures precise brownout detection for +3.3V rail monitoring |
| Reset Timeout Period | 140–280ms - provides sufficient hold time for µP boot sequence before releasing reset |
| Watchdog Startup Delay | 35s minimum - allows complex firmware initialization without spurious timeout |
| Normal Watchdog Timeout | 1.12s minimum - detects stalled code execution within sub-second latency |
| Supply Current | 14µA typical at +3.6V - enables battery-backed operation in portable equipment |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom environments |
| RST Output Type | Active-low open-drain - compatible with bidirectional µP reset pins and level-shifting interfaces |
Pinout & Package
SOT23-6 package (6-pin, 1.6mm × 2.9mm footprint), lead-free option available as MAX6730UTVD3+T. Pin 1 marked with dot; pin 1 = RST, pin 2 = GND, pin 3 = WDO, pin 4 = MR, pin 5 = WDI, pin 6 = VCC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Open-drain driver; requires external pullup; asserts low on VCC1 undervoltage or MR activation |
| 2 (GND) | Ground reference | Common return path for all internal comparators and logic; must be low-impedance |
| 3 (WDO) | Active-low watchdog output | Open-drain watchdog status signal; asserts low if WDI stalls beyond timeout |
| 4 (MR) | Active-low manual reset input | Internally pulled up to VCC1 (50kΩ); drives RST low when asserted; accepts TTL/CMOS levels |
| 5 (WDI) | Watchdog input | Edge-sensitive input; clears watchdog timer on rising/falling transition; floating = no disable |
| 6 (VCC1) | Primary supply voltage input | Powers device and feeds VCC1 monitor; valid range +0.8V to +5.5V; determines MR/WDO logic levels |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode watchdog timer | 35s startup delay + 1.12s normal timeout - eliminates false resets during boot while enabling fast hang detection |
| Guaranteed reset validity | Operates down to VCC1 = +0.8V - ensures deterministic reset assertion during deep brownout |
| Immunity to short VCC transients | Rejects falling glitches <10µs at 100mV overdrive - prevents noise-induced spurious resets |
| Low quiescent current | 14µA typical at +3.6V - extends battery life in portable and always-on applications |
| Factory-trimmed precision threshold | 3.075V ±1.5% over temperature - eliminates external resistor network for +3.3V rail supervision |
Applications
| Telecom Power Sequencing | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring +3.3V management rail in LTE base station power module during cold start and thermal cycling. IC Role / Device Role / Timing Role: Single-supply supervisor providing power-on reset and watchdog-triggered recovery for ARM-based control MCU. Use Value: 3.075V threshold matches +3.3V rail tolerance; 140–280ms timeout accommodates FPGA configuration time; open-drain RST interfaces directly with bidirectional µP reset I/O. |
Use Scenario: Ensuring deterministic restart after brownout in DIN-rail mounted programmable logic controller with isolated I/O. IC Role / Device Role / Timing Role: Primary reset generator and watchdog enforcer for real-time control loop processor. Use Value: Guaranteed reset down to +0.8V prevents latch-up during partial rail collapse; 14µA supply current minimizes auxiliary power draw; -40°C to +85°C rating supports uncooled cabinet operation. |
| Network Switch ASIC Initialization | Medical Diagnostic Handheld |
Use Scenario: Supervising +3.3V core supply for packet processing ASIC during hot-swap insertion in managed Ethernet switch. IC Role / Device Role / Timing Role: Fault-detection interface between power management IC and ASIC reset domain. Use Value: Immunity to <10µs VCC glitches prevents false resets during hot-swap transients; MR input enables remote reset via service port; SOT23-6 footprint saves board space near ASIC. |
Use Scenario: Providing fail-safe reset and software lockup recovery in battery-powered ultrasound probe with ARM Cortex-M4. IC Role / Device Role / Timing Role: System-level reliability guardian for safety-critical embedded application. Use Value: 14µA quiescent current extends single-charge battery life; dual-mode watchdog (35s startup + 1.12s runtime) covers both boot and operational phases; open-drain RST simplifies level translation to 1.8V logic domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-supply µP supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT31D3-T | 3.08V reset threshold, 200ms timeout, push-pull RST output, no watchdog | Lacks independent watchdog output; suited for simpler reset-only use cases | Select when watchdog functionality is unnecessary and push-pull drive is preferred |
| TPS3808G33DBVR | 3.3V reset threshold, 200ms timeout, push-pull RST, integrated watchdog with 1.6s timeout | Higher threshold (3.3V vs. 3.075V); different watchdog architecture (no startup delay mode) | Select when tighter +3.3V rail margin is acceptable and TI ecosystem compatibility is required |
Compared with MAX6730UTVD3, MAX6326UT31D3-T omits watchdog capability but offers push-pull RST for direct µP interface, while TPS3808G33DBVR provides higher threshold accuracy at +3.3V but lacks the critical 35s startup delay needed for complex boot sequences.
Availability
MAX6730UTVD3 is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC controllers, network switch ASIC initialization, and medical diagnostic handhelds requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6730UTVD3 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, communications, and computing applications.
The MAX6730–MAX6735 family delivers single-/dual-/triple-voltage µP supervision with independent watchdog outputs, targeting systems where reliability, low power, and accurate voltage monitoring are critical.
FAQ
What is the exact reset threshold voltage for MAX6730UTVD3?
The MAX6730UTVD3 has a factory-set VCC1 reset threshold of 3.075V (nominal), with ±1.5% tolerance over the full –40°C to +85°C operating range. This value is confirmed in Table 1 of the datasheet under suffix "TV", and applies specifically to the MAX6730UTVD3 variant - not the broader MAX6730 family.
Does MAX6730UTVD3 include a watchdog timer, and what are its timing modes?
Yes, MAX6730UTVD3 includes a dual-mode watchdog timer: a 35s minimum startup delay after reset (to allow system initialization), followed by a 1.12s minimum normal timeout period (for detecting runtime hangs). These values are specified in the Electrical Characteristics table and apply directly to MAX6730UTVD3 per its ordering suffix D3.
What package type and pin count does MAX6730UTVD3 use?
MAX6730UTVD3 is packaged in a 6-pin SOT23-6 outline (1.6mm × 2.9mm), with pin 1 marked by a dot. Pinout is fixed: Pin 1 = RST (open-drain), Pin 2 = GND, Pin 3 = WDO (open-drain), Pin 4 = MR, Pin 5 = WDI, Pin 6 = VCC1 - confirmed in the Pin Configurations diagram and Pin Description table.
Is the reset output of MAX6730UTVD3 push-pull or open-drain?
The reset output of MAX6730UTVD3 is active-low open-drain, as defined by its "UT" prefix and confirmed in the Selector Guide (page 15) and Pin Description (page 7). It requires an external pullup resistor and is compatible with bidirectional µP reset pins without contention.
What is the supply current specification for MAX6730UTVD3 at +3.6V?
MAX6730UTVD3 draws 14µA typical supply current at +3.6V and +25°C, with ICC1 = 10µA and ICC2 = 4µA (though ICC2 is not applicable for single-supply MAX6730 variants). This value is measured across temperature and confirmed in the Electrical Characteristics table (page 2) and Typical Operating Characteristics plots (page 5).
MAX6730UTVD3 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 FAQ
1.How can I place an order for MAX6730UTVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730UTVD3 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 reliable?
The price and inventory of MAX6730UTVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730UTVD3 is usually 5 days.
3.What payment methods are accepted for MAX6730UTVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730UTVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730UTVD3?
MAX6730UTVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730UTVD3 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?
For technical support, including MAX6730UTVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730UTVD3 requirements.
6.How does Aetrix verify that MAX6730UTVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6730UTVD3 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 meets industry standards.
7.What is the process for return or replacement of MAX6730UTVD3?
All MAX6730UTVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730UTVD3, 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 part is unused and in its original packaging.
Return procedure for MAX6730UTVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6730UTVD3 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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