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Analog Devices Inc./Maxim Integrated MAX6307UK27D2-T
- Part No.:
- MAX6307UK27D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK27D2-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,470
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Product details
Overview
MAX6307UK27D2-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 2.7V 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 20ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. Used in multivoltage embedded systems for reliable power-on and brownout reset control.
For engineers reviewing the MAX6307UK27D2-T datasheet, MAX6307UK27D2-T pinout, MAX6307UK27D2-T application, or MAX6307UK27D2-T equivalent, key selection criteria include its dual-input monitoring capability (VCC + RST IN + OVRST IN), factory-trimmed 2.7V VCC threshold with ±2.5% tolerance over temperature, 20ms reset timeout, SOT23-5 package compatibility, and immunity to fast VCC transients up to 100V/µs.
Technical Context
The MAX6307UK27D2-T implements a triple-monitoring architecture: internal factory-trimmed resistor divider sets the primary VCC reset threshold at 2.7V; external resistor dividers program RST IN (undervoltage) and OVRST IN (overvoltage) thresholds referenced to a 1.23V internal bandgap. All three comparators feed into a shared reset generator with a fixed 20ms timeout period.
Its push/pull RESET output drives low actively (VOL ≤ 0.3V at ISINK = 1.2mA) and high passively (VOH ≥ 0.8×VCC), eliminating external pull-up requirements. The device operates across VCC = (2.7V × 1.025) to +5.5V and remains functional down to VCC = 1V, with guaranteed reset assertion even during slow power ramp-up or brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.7V nominal, ±2.5% over -40°C to +85°C - ensures reliable detection of 3.3V rail collapse before microprocessor malfunction |
| Reset Timeout Period | 20ms minimum - provides sufficient hold time for CPU initialization and peripheral stabilization after power recovery |
| Supply Current | 8µA typical at +25°C - enables use in battery-powered portable equipment with multi-year shelf life |
| RESET Output Type | Push/pull active-low - eliminates need for external pull-up resistor and supports direct interface to CMOS/TTL reset inputs |
| Operating VCC Range | 2.7675V to 5.5V - supports operation on regulated 3.3V supplies while monitoring for under/overvoltage faults |
| Input Leakage Current | ±25nA max on RST IN/OVRST IN - allows use of high-value resistor dividers (>1MΩ) without significant threshold error |
| Transient Immunity | Immune to VCC transients ≤100V/µs - prevents false resets during switching noise or ESD events |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, 0.95mm pitch, gull-wing leads, RoHS-compliant lead-free finish (designated by "+T"; this part uses standard "-T").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert system reset; sources current when high - directly interfaces µP reset pins without external components |
| 2 - GND | System ground reference | Return path for all internal comparators and output driver; must be connected to main system ground plane |
| 3 - OVRST IN | Adjustable overvoltage reset comparator input | Asserts reset when external voltage exceeds programmed threshold (via resistor divider); connect to GND if unused |
| 4 - RST IN | Adjustable undervoltage reset comparator input | Asserts reset when external voltage falls below programmed threshold; connect to VCC if unused |
| 5 - VCC | Main supply input and monitored rail | Power source and primary monitored voltage; internal trimmed divider sets 2.7V reset point |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | Simultaneous supervision of VCC (2.7V), external undervoltage (RST IN), and external overvoltage (OVRST IN) rails - enables comprehensive power integrity in multirail systems |
| Factory-trimmed precision threshold | 2.7V VCC reset point with ±2.5% tolerance over full industrial temperature range - eliminates calibration overhead in production |
| No external timing components | Internally generated 20ms reset timeout - reduces BOM count and PCB area versus RC-based solutions |
| Guaranteed reset validity to 1V | RESET remains asserted and logic-valid even as VCC drops to 1V - ensures deterministic behavior during deep brownout |
| High-noise immunity inputs | RST IN and OVRST IN reject transients via internal filtering and support external 0.1µF bypass capacitors - suppresses false triggers in electrically noisy environments |
Applications
| Industrial PLC Power Monitoring | Medical Portable Diagnostic Device |
|---|---|
Use Scenario: Monitors 3.3V logic rail and 5V analog sensor supply in a battery-powered handheld ultrasound unit, asserting reset if either rail deviates beyond safe operating limits. IC Role / Device Role / Timing Role: Triple-input supervisory IC providing coordinated reset assertion across two critical voltage domains with 20ms hold time. Use Value: Prevents corrupted image acquisition or firmware lockup during battery discharge or load-switching transients. | Use Scenario: Ensures clean startup and fault recovery in a DIN-rail mounted programmable logic controller with separate 24V field I/O and 5V logic rails. IC Role / Device Role / Timing Role: Primary VCC monitor (2.7V threshold on 3.3V logic rail), plus RST IN for 24V-to-5V converter feedback and OVRST IN for 24V field bus overvoltage detection. Use Value: Eliminates need for discrete comparators and timers, reducing design complexity and improving long-term reliability in harsh industrial environments. |
| Automotive Body Control Module | Network Edge Router Power Sequencing |
Use Scenario: Supervises 5V microcontroller supply and 12V CAN transceiver rail in a vehicle door module, detecting both undervoltage (battery sag) and overvoltage (load dump) conditions. IC Role / Device Role / Timing Role: Dual-threshold supervisor using VCC (2.7V on 3.3V MCU rail), RST IN (for 5V regulator feedback), and OVRST IN (for 12V line monitoring). Use Value: Enables single-chip protection against automotive electrical faults without requiring additional voltage references or comparators. | Use Scenario: Coordinates power-up sequencing between FPGA core (1.0V), I/O bank (3.3V), and PHY interface (2.5V) in a carrier-grade Ethernet router. IC Role / Device Role / Timing Role: Configured with VCC monitoring (2.7V on 3.3V rail), RST IN for 1.0V core supply, and OVRST IN for 2.5V PHY overvoltage detection. Use Value: Guarantees deterministic reset timing across multiple voltage domains, preventing configuration errors during cold start or hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK27D3-T | Same 2.7V VCC threshold and pinout, but 140ms minimum reset timeout vs. 20ms | Better suited for systems requiring longer reset hold times (e.g., complex FPGAs or DDR memory initialization) | Select when extended reset duration is required; not drop-in compatible due to timeout difference |
| TPS3808G125DBVR | 2.5V fixed VCC threshold, 20ms timeout, SOT23-5, but only monitors VCC - no RST IN or OVRST IN inputs | Limited to single-rail monitoring; lacks dual external input capability of MAX6307UK27D2-T | Choose for cost-sensitive single-supply applications where external rail monitoring is handled separately |
Compared with MAX6307UK27D3-T and TPS3808G125DBVR, the MAX6307UK27D2-T uniquely delivers triple-rail supervision (VCC + RST IN + OVRST IN) in a 5-pin SOT23 with factory-set 2.7V threshold and precisely 20ms timeout - enabling compact, robust power integrity in multivoltage embedded systems without external components.
Availability
MAX6307UK27D2-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body controllers, and network edge routers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6307UK27D2-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 connectivity applications, serving industrial, automotive, and communications markets.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision - integrating factory-programmable thresholds, multiple input channels, and precise timeout periods into ultra-small SOT23 packages for space-constrained embedded systems.
FAQ
What is the exact factory-set VCC reset threshold for MAX6307UK27D2-T?
The MAX6307UK27D2-T has a factory-trimmed VCC reset threshold of 2.7V nominal, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 1 of the datasheet and corresponds to the "27" in the part number. The actual threshold is set via internal laser-trimmed resistors and does not require external calibration.
Does MAX6307UK27D2-T support monitoring of both undervoltage and overvoltage on external rails?
Yes, the MAX6307UK27D2-T supports simultaneous undervoltage monitoring on the RST IN pin and overvoltage monitoring on the OVRST IN pin, in addition to its primary VCC (2.7V) supervision. Each external input compares against the internal 1.23V reference using external resistor dividers, allowing flexible threshold programming for auxiliary power rails.
What is the function of the RESET pin on MAX6307UK27D2-T and how does it differ from open-drain alternatives?
The RESET pin on MAX6307UK27D2-T is an active-low push/pull output that both sinks and sources current - unlike open-drain variants (e.g., MAX6305 series). This eliminates the need for an external pull-up resistor and ensures fast, robust logic-level transitions directly compatible with standard CMOS/TTL reset inputs across the full VCC range.
Can MAX6307UK27D2-T operate reliably during brownout conditions where VCC drops below 2.0V?
Yes, the MAX6307UK27D2-T guarantees valid RESET assertion down to VCC = 1.0V, as specified in the Electrical Characteristics table. Its internal circuitry remains functional and the RESET output maintains correct logic levels even during severe brownouts, ensuring deterministic system behavior until power fully collapses.
What are the absolute maximum ratings for the RST IN and OVRST IN pins of MAX6307UK27D2-T?
The RST IN and OVRST IN pins of MAX6307UK27D2-T have an absolute maximum rating of -0.3V to (VCC + 0.3V), per the Absolute Maximum Ratings table. Input current is limited to ±25nA, and the pins feature internal ESD protection. Exceeding these voltage limits risks damage or erroneous reset assertion, especially during VCC brownout when driving signals from separate supplies.
MAX6307UK27D2-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:
- 2.7V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK27D2-T FAQ
1.How can I place an order for MAX6307UK27D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK27D2-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 MAX6307UK27D2-T reliable?
The price and inventory of MAX6307UK27D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK27D2-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK27D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK27D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK27D2-T?
MAX6307UK27D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK27D2-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 MAX6307UK27D2-T?
For technical support, including MAX6307UK27D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK27D2-T requirements.
6.How does Aetrix verify that MAX6307UK27D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK27D2-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 MAX6307UK27D2-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK27D2-T?
All MAX6307UK27D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK27D2-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 MAX6307UK27D2-T part is unused and in its original packaging.
Return procedure for MAX6307UK27D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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