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Analog Devices Inc./Maxim Integrated MAX6307UK31D4-T
- Part No.:
- MAX6307UK31D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK31D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,597
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Product details
Overview
MAX6307UK31D4-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 3.1V reset threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert a push/pull active-low RESET output. It features 1120ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6307UK31D4-T datasheet, MAX6307UK31D4-T pinout, MAX6307UK31D4-T application, or MAX6307UK31D4-T equivalent, this page delivers verified specifications, validated pin functions, confirmed alternative parts with technical distinctions, and real-world use cases for portable computers, controllers, and battery-powered instrumentation.
Technical Context
The MAX6307UK31D4-T implements a triple-monitor architecture: internal factory-trimmed voltage divider for VCC supervision at 3.1V ±2.5%, external resistor-divider-configurable RST IN for secondary undervoltage detection, and OVRST IN for overvoltage fault response. All three inputs feed independent comparators referenced to a stable 1.23V internal bandgap.
Its push/pull RESET output drives low actively and pulls high via internal sourcing (VOH ≥ 0.8×VCC at ISOURCE = 150µA), eliminating need for external pull-up. The 1120ms reset timeout (D4 variant) is factory-programmed and temperature-stable (±0.5% variation over -40°C to +85°C), ensuring reliable power-up sequencing in industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.1V ±2.5% (factory-trimmed); ensures precise 3.3V rail supervision with margin against ripple-induced false resets |
| Reset Timeout Period | 1120ms minimum; guarantees µP initialization completes before release in slow-ramping power supplies |
| Supply Current | 8µA typical at VCC = 5.5V; enables multi-year battery life in portable instrumentation |
| RESET Output Type | Push/pull active-low; sinks 3.2mA and sources 150µA - eliminates external pull-up and supports direct µP interface |
| Operating Temperature | 0°C to +70°C; qualified for commercial-grade embedded control and computing applications |
| RST IN / OVRST IN Threshold | 1.23V reference with ±25nA leakage; allows megohm-level resistor dividers for low-power auxiliary rail monitoring |
| VCC Validity Range | 1.0V to 5.5V; RESET remains valid down to 1V, supporting brownout detection before µP lockup |
Pinout & Package
MAX6307UK31D4-T is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCBs in portable and industrial designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to reset µP; actively pulls high when deasserted - no external pull-up required |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance for noise immunity |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors secondary supply (e.g., 1.8V core) via external resistor divider; asserts reset if input falls below 1.23V |
| 4 - OVRST IN | Adjustable overvoltage reset input | Triggers reset when monitored voltage exceeds 1.23V reference - protects against overvoltage faults on auxiliary rails |
| 5 - VCC | Main supply input and primary monitor | Power source and monitored rail; internal trimmed divider sets 3.1V reset point; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises main VCC (3.1V), secondary undervoltage (RST IN), and overvoltage (OVRST IN) - reduces BOM count in multirail systems |
| Factory-programmed timing | 1120ms reset timeout (D4) is laser-trimmed and stable across temperature - eliminates timing capacitor tolerance and aging drift |
| Transient immunity | Immune to VCC transients ≤100ns at 3.1V overdrive; prevents false resets during switching noise or ESD events |
| No external components | Operates without capacitors or resistors for basic function - simplifies layout and improves reliability in high-vibration environments |
| Guaranteed 1V operation | RESET remains logic-valid down to VCC = 1V - enables early brownout detection before µP enters undefined state |
Applications
| Portable Computers | Industrial Controllers |
|---|---|
Use Scenario: Dual-rail (5V/3.3V) power sequencing in compact laptop docking stations with battery backup. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V rail, secondary RST IN monitor for 1.8V SoC core, and OVRST IN guard for 5V USB bus overvoltage. Use Value: Prevents firmware corruption during hot-plug events by asserting 1120ms reset on any rail fault - matches BIOS initialization window. |
Use Scenario: PLC I/O module with isolated 24V field power, 5V logic, and 3.3V microcontroller supply. IC Role / Device Role / Timing Role: Monitors 3.3V µP supply (VCC), 5V interface rail (RST IN), and 24V field bus (OVRST IN via divider). Use Value: Detects both under- and overvoltage faults on separate domains with single IC - eliminates need for discrete comparators and timers. |
| Battery-Powered Instruments | Multivoltage Embedded Systems |
Use Scenario: Handheld multimeter powered by two AA cells (1.8V–3.2V range) with LCD and ADC subsystems. IC Role / Device Role / Timing Role: VCC supervision at 3.1V threshold ensures reset before brownout; RST IN monitors 1.8V analog front-end rail. Use Value: 8µA quiescent current extends battery life >2 years; 1120ms timeout accommodates slow alkaline discharge curves. |
Use Scenario: Automotive infotainment head unit with 12V input, 5V system rail, 3.3V processor, and 1.2V DDR memory. IC Role / Device Role / Timing Role: Supervises 3.3V processor rail (VCC), 5V USB hub (RST IN), and 12V input surge (OVRST IN). Use Value: Single-chip triple monitoring replaces three discrete supervisors - reduces footprint by 60% and improves fault coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable reset IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK31D3-T | 140ms minimum reset timeout (vs. 1120ms); otherwise identical pinout, thresholds, and features | Suitable for fast-booting µPs where shorter reset hold time is acceptable | Select when system boot sequence completes in <200ms and longer timeout risks unnecessary delay |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 3.1V); open-drain output (requires pull-up); 200ms timeout; supports -40°C to +125°C | Designed for automotive under-hood use; lacks OVRST IN and RST IN inputs | Choose only if overvoltage/secondary rail monitoring is unnecessary and extended temperature range is mandatory |
Compared with MAX6307UK31D3-T and TPS3808G33DBVR, the MAX6307UK31D4-T uniquely combines 3.1V precision VCC supervision, dual adjustable inputs (RST IN/OVRST IN), push/pull output, and long 1120ms timeout - making it optimal for complex multirail systems requiring coordinated, extended reset assertion.
Availability
MAX6307UK31D4-T is available at Aetrix Electronics and suitable for portable computers, industrial controllers, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6307UK31D4-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6305–MAX6313 family was designed specifically for multivoltage microprocessor supervisory applications - delivering precision reset generation, transient immunity, and flexible input monitoring in minimal SOT23 packaging.
FAQ
What is the exact factory-set VCC reset threshold for MAX6307UK31D4-T?
The MAX6307UK31D4-T has a factory-trimmed VCC reset threshold of 3.1V, specified with ±2.5% tolerance over the 0°C to +70°C operating range. This value is laser-trimmed during production and corresponds to the "31" in the part number per Maxim's Table 1. The threshold is referenced to an internal 1.23V bandgap and remains stable across temperature with 40ppm/°C drift.
Does MAX6307UK31D4-T require external components to function as a basic VCC supervisor?
No, the MAX6307UK31D4-T requires no external components for core VCC supervision. Its 3.1V reset threshold, 1120ms timeout, and push/pull RESET output are fully factory-programmed. External resistors are only needed if using RST IN or OVRST IN for auxiliary rail monitoring - not required for standalone 3.3V system reset functionality.
How does the OVRST IN pin function in MAX6307UK31D4-T?
In the MAX6307UK31D4-T, the OVRST IN pin is an overvoltage comparator input referenced to 1.23V. When the voltage applied to OVRST IN exceeds 1.23V (set via external resistor divider), the device asserts RESET. This enables protection against overvoltage on secondary rails - for example, configuring OVRST IN to trip at 5.5V on a 5V bus while VCC monitors the 3.3V processor rail.
What is the guaranteed operating voltage range for MAX6307UK31D4-T?
The MAX6307UK31D4-T operates from VCC = 1.0V to 5.5V. Crucially, its RESET output remains valid (logic-low or logic-high) down to VCC = 1.0V, enabling reliable brownout detection before the microprocessor loses functional integrity. Below 1.0V, output behavior is not guaranteed per the datasheet Absolute Maximum Ratings.
Is MAX6307UK31D4-T pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes, all MAX6305–MAX6313 devices share identical 5-pin SOT23 pinout and pin functions. The MAX6307UK31D4-T uses pins 1 (RESET), 2 (GND), 3 (RST IN), 4 (OVRST IN), and 5 (VCC) - matching the MAX6307/MAX6310/MAX6313 variant group. This allows drop-in replacement within the same functional subgroup when reset threshold and timeout meet design requirements.
MAX6307UK31D4-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.08V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK31D4-T FAQ
1.How can I place an order for MAX6307UK31D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK31D4-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 MAX6307UK31D4-T reliable?
The price and inventory of MAX6307UK31D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK31D4-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK31D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK31D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK31D4-T?
MAX6307UK31D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK31D4-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 MAX6307UK31D4-T?
For technical support, including MAX6307UK31D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK31D4-T requirements.
6.How does Aetrix verify that MAX6307UK31D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK31D4-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 MAX6307UK31D4-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK31D4-T?
All MAX6307UK31D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK31D4-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 MAX6307UK31D4-T part is unused and in its original packaging.
Return procedure for MAX6307UK31D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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