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Analog Devices Inc./Maxim Integrated MAX6307UK31D3+T
- Part No.:
- MAX6307UK31D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK31D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,058
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Product details
Overview
MAX6307UK31D3+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 3.1V threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert reset during power faults. It features 140ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. Used in multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6307UK31D3+T datasheet, MAX6307UK31D3+T pinout, MAX6307UK31D3+T application, or MAX6307UK31D3+T equivalent, this page delivers verified specifications, validated pin functions, confirmed alternative parts with documented differences, and real-world use cases for portable computers, battery-powered controllers, and dual-rail industrial instrumentation.
Technical Context
The MAX6307UK31D3+T implements a triple-monitor architecture: internal factory-trimmed voltage divider for VCC supervision at 3.1V ±2.5%, external resistor-programmable RST IN comparator referenced to 1.23V, and OVRST IN comparator for overvoltage detection. All three inputs feed a shared reset generator with 140ms minimum timeout.
Its open-drain active-low RESET output operates reliably across VCC = 1.0V to 5.5V, with VOL ≤0.3V at ISINK = 500µA and VCC > 1.8V. The device ignores transients ≤200ns on any monitored rail and maintains guaranteed operation from 0°C to +70°C in SOT23-5 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.1V ±2.5% at TA = 0°C to +70°C - factory-trimmed for precise 3.3V system monitoring |
| Reset Timeout Period | 140ms (min) - ensures µP initialization completes before release, preventing premature execution |
| Supply Current | 8µA (typ) at VCC = 5.5V - enables multi-year battery life in portable equipment |
| RESET Output Type | Active-low open-drain - supports bidirectional µP reset pins and flexible pull-up voltage selection |
| RST IN Threshold Reference | 1.23V ±0.03V - allows accurate external resistor-divider programming of secondary supply thresholds |
| OVRST IN Function | Overvoltage comparator - detects excessive voltage on auxiliary rails (e.g., 5V backup line) |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and computing applications |
Pinout & Package
Package: 5-pin SOT23 (U5+1), RoHS-compliant lead-free, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low during fault conditions; requires external pull-up; sinks ≥500µA at VCC > 1.8V |
| 2 - GND | System ground reference | Common return path for all internal comparators and reset generator; must be low-impedance |
| 3 - OVRST IN | Adjustable overvoltage reset input | Asserts reset when voltage exceeds programmed threshold via external resistor divider to 1.23V reference |
| 4 - RST IN | Adjustable undervoltage reset input | Asserts reset when voltage falls below programmed threshold; immune to transients <200ns |
| 5 - VCC | Main supply input and monitored rail | Supplies internal circuitry and is monitored at factory-set 3.1V threshold; valid operation from 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC (3.1V), RST IN (user-programmable), and OVRST IN (user-programmable) supervision in one SOT23-5 package |
| Transient immunity | Guaranteed immunity to VCC transients ≤200ns duration, eliminating false resets in noisy environments |
| Low-power operation | 8µA typical supply current enables integration into always-on battery-backed subsystems without significant drain |
| No external components required | Factory-programmed threshold and timeout eliminate need for external capacitors or precision resistors for basic operation |
| Valid reset at low VCC | RESET remains asserted and electrically valid down to VCC = 1.0V, ensuring reliable behavior during deep brownouts |
Applications
| Portable Computers | Industrial Controllers |
|---|---|
Use Scenario: Dual-rail (3.3V/5V) motherboard power sequencing with battery backup. IC Role / Device Role / Timing Role: Supervises main 3.3V rail (VCC), monitors 5V standby rail via RST IN, and detects 5V overvoltage via OVRST IN to prevent damage. Use Value: Single-chip solution replaces discrete supervisor + comparator + timer, reducing BOM count and PCB area by 60%. |
Use Scenario: PLC I/O module with isolated 24V field power and 3.3V logic supply. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail (VCC = 3.1V threshold), uses RST IN to supervise isolated 24V DC-DC output, and applies OVRST IN to guard against field-wiring surges. Use Value: Eliminates need for separate overvoltage protection IC while maintaining 140ms reset hold time for deterministic firmware recovery. |
| Battery-Powered Instruments | Multivoltage Embedded Systems |
Use Scenario: Handheld multimeter with Li-ion battery (3.0–4.2V) and 3.3V/1.8V dual-core SoC. IC Role / Device Role / Timing Role: Uses VCC monitor for battery voltage supervision, RST IN for 1.8V core rail, and OVRST IN to detect charger overvoltage during USB-C fast-charge events. Use Value: 8µA quiescent current extends battery runtime beyond 12 months in sleep mode; 140ms timeout prevents spurious wakeups. |
Use Scenario: Automotive infotainment head unit with 5V, 3.3V, and 1.2V supplies. IC Role / Device Role / Timing Role: Configured as primary 3.3V supervisor (VCC = 3.1V), with RST IN monitoring 5V analog supply and OVRST IN guarding 1.2V GPU rail against regulator failure. Use Value: Enables single-point reset coordination across three independent power domains, simplifying system-level fault response and diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable reset IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK31D2+T | Same 3.1V VCC threshold and pinout, but 20ms (min) reset timeout instead of 140ms | Suitable for fast-boot microcontrollers where shorter reset hold time is acceptable | Select when system boot sequence completes in <25ms and faster recovery from transient dips is required |
| TLV809E31DBZR | Single-input 3.1V reset IC in SOT23-3; no RST IN/OVRST IN capability; 200ms timeout; 1.6µA ICC | Lacks dual-input flexibility; only monitors VCC; lower supply current but no overvoltage detection | Choose for cost-sensitive, single-rail applications where auxiliary monitoring is unnecessary and ultra-low ICC is critical |
Compared with MAX6307UK31D2+T, the MAX6307UK31D3+T provides longer reset assertion for slower peripherals; compared with TLV809E31DBZR, it adds two programmable inputs for multirail systems but consumes higher current - making it optimal for complex embedded designs needing coordinated reset across multiple supplies.
Availability
MAX6307UK31D3+T is available at Aetrix Electronics and suitable for portable computers, industrial controllers, and battery-powered instrumentation requiring stable component supply across extended production lifecycles.
Supply support for MAX6307UK31D3+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 power management, sensing, and interface applications.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space-constrained, low-power systems - delivering factory-programmed accuracy, transient immunity, and triple-input flexibility in SOT23-5.
FAQ
What is the factory-programmed reset threshold voltage for MAX6307UK31D3+T?
The MAX6307UK31D3+T has a factory-programmed VCC reset threshold of 3.1V, specified with ±2.5% tolerance over the 0°C to +70°C operating temperature range. This value is trimmed using an internal resistor divider and is optimized for monitoring standard 3.3V power rails. The "31" in the part number directly encodes the 3.1V nominal threshold per Maxim's ordering convention.
Does MAX6307UK31D3+T support monitoring of voltages other than VCC?
Yes, MAX6307UK31D3+T supports two additional monitored inputs: RST IN (undervoltage) and OVRST IN (overvoltage). Both accept externally programmed thresholds via resistor dividers referenced to a stable 1.23V internal reference. This enables simultaneous supervision of up to three independent power rails - for example, VCC (3.3V), a 5V auxiliary supply via RST IN, and a 12V field bus via OVRST IN.
What is the reset timeout period for MAX6307UK31D3+T, and how is it set?
The MAX6307UK31D3+T features a factory-programmed reset timeout period of 140ms (minimum), indicated by the "D3" suffix. This timeout is fixed and non-adjustable; it defines the minimum duration RESET remains asserted after all monitored supplies return to regulation. The internal timer begins only when all three inputs (VCC, RST IN, OVRST IN) exceed their respective thresholds, ensuring deterministic system startup.
Can MAX6307UK31D3+T operate with VCC below 3.1V and still assert a valid reset signal?
Yes, MAX6307UK31D3+T guarantees RESET assertion and electrical validity down to VCC = 1.0V. Its open-drain output maintains VOL ≤0.3V at ISINK = 500µA for VCC > 1.8V, and remains functional even as VCC drops further - enabling reliable brownout detection and reset hold during deep supply collapse. Below 1.0V, operation is not specified.
Is MAX6307UK31D3+T pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes, MAX6307UK31D3+T shares identical SOT23-5 pinout and footprint with all members of the MAX6305–MAX6313 family, including MAX6306, MAX6309, MAX6310, MAX6312, and MAX6313. Pin 1 is RESET, Pin 2 is GND, Pin 3 is OVRST IN, Pin 4 is RST IN, and Pin 5 is VCC - enabling drop-in replacement within the same functional subgroup (i.e., those with OVRST IN/RST IN capability).
MAX6307UK31D3+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:
- Active
- 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:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK31D3+T FAQ
1.How can I place an order for MAX6307UK31D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK31D3+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 MAX6307UK31D3+T reliable?
The price and inventory of MAX6307UK31D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK31D3+T is usually 5 days.
3.What payment methods are accepted for MAX6307UK31D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK31D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK31D3+T?
MAX6307UK31D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK31D3+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 MAX6307UK31D3+T?
For technical support, including MAX6307UK31D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK31D3+T requirements.
6.How does Aetrix verify that MAX6307UK31D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK31D3+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 MAX6307UK31D3+T meets industry standards.
7.What is the process for return or replacement of MAX6307UK31D3+T?
All MAX6307UK31D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK31D3+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 MAX6307UK31D3+T part is unused and in its original packaging.
Return procedure for MAX6307UK31D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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