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Analog Devices Inc./Maxim Integrated MAX6307UK29D3-T
- Part No.:
- MAX6307UK29D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK29D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,369
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Product details
Overview
The MAX6307UK29D3-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory circuit designed to monitor VCC, an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting an active-low push/pull RESET output when any threshold is violated. It features a factory-set VCC reset threshold of 2.93V (±2.5% over temperature), 140ms 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 MAX6307UK29D3-T datasheet, MAX6307UK29D3-T pinout, MAX6307UK29D3-T application, or MAX6307UK29D3-T equivalent, key selection considerations include its dual adjustable reset inputs, factory-trimmed 2.93V VCC threshold, 140ms timeout, SOT23-5 package compatibility, and immunity to fast VCC transients up to 280µs at 2.93V overdrive.
Technical Context
The MAX6307UK29D3-T implements a triple-monitor architecture: internal factory-trimmed resistor divider for VCC supervision (2.93V nominal), external resistor-divider–based comparator for RST IN (undervoltage), and OVRST IN (overvoltage), all referenced to a 1.23V internal bandgap. Its push/pull RESET output drives high/low with guaranteed VOL ≤0.3V at ISINK = 1.2mA and VOH ≥0.8×VCC at ISOURCE = 150µA.
It operates across 0°C to +70°C, supports VCC from (VTH + 2.5%) to +5.5V (i.e., ≥3.0V), and features ±25nA RST IN_/OVRST IN leakage, enabling megohm-level external dividers. The device ignores transients ≤280µs duration when VCC dips 2.93V below threshold, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V ±2.5% over -40°C to +85°C - sets brownout detection point for main supply |
| Reset Timeout Period | 140ms (min) - ensures µP reset pulse meets minimum assertion time for reliable boot |
| Supply Current | 8µA (typ) at VCC = 5.5V - enables battery-powered operation with minimal quiescent drain |
| RESET Output Type | Active-low push/pull - eliminates external pull-up, drives CMOS/TTL loads directly |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference - allows precise external voltage monitoring via resistor divider |
| Operating VCC Range | 3.0V to 5.5V - requires VCC ≥3.0V (2.93V + 2.5%) for valid internal monitoring |
| Transient Immunity | ≤280µs negative VCC glitch at 2.93V overdrive - prevents false resets during switching noise |
Pinout & Package
MAX6307UK29D3-T is housed in a 5-pin SOT23-5 surface-mount package (outline 21-0057, land pattern 90-0174), optimized for space-constrained portable and embedded designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert system reset; sinks 1.2mA or sources 150µA; no external pull-up required |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance |
| 3 - OVRST IN | Adjustable overvoltage reset input | Asserts reset when external voltage exceeds threshold set by resistor divider to 1.23V reference |
| 4 - RST IN | Adjustable undervoltage reset input | Asserts reset when external voltage falls below threshold set by resistor divider to 1.23V reference |
| 5 - VCC | Main supply input and monitored rail | Powers device and feeds internal trimmed divider for 2.93V factory-set reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | VCC (2.93V), RST IN (user-defined undervoltage), OVRST IN (user-defined overvoltage) - enables comprehensive power-rail supervision in mixed-voltage systems |
| Factory-trimmed precision threshold | 2.93V ±2.5% over full temperature range - eliminates calibration effort and external components for primary supply monitoring |
| No external timing components | 140ms factory-programmed timeout - guarantees consistent reset pulse width without capacitors or resistors |
| Low-power operation | 8µA supply current - extends battery life in portable equipment and reduces self-heating in sealed enclosures |
| Transient-immune architecture | Immunity to VCC glitches ≤280µs at 2.93V overdrive - suppresses false resets caused by digital switching noise or EMI |
Applications
| Industrial PLC Power Monitoring | Medical Portable Diagnostic Device |
|---|---|
Use Scenario: Supervises 3.3V logic rail and 5V analog supply in a battery-powered ultrasound probe, detecting brownout and overvoltage faults during high-current transducer bursts. IC Role / Device Role / Timing Role: Triple-input supervisor asserts RESET if either supply deviates beyond 2.93V (VCC), user-defined RST IN threshold (3.3V rail), or OVRST IN threshold (5V rail). Use Value: Prevents corrupted image acquisition by ensuring µP reset occurs before analog front-end misbehavior due to out-of-spec supplies. |
Use Scenario: Monitors main 3.3V MCU supply and backup coin-cell voltage in a handheld glucose meter, triggering safe shutdown on critical undervoltage. IC Role / Device Role / Timing Role: Uses VCC input for primary 3.3V supervision (2.93V threshold) and RST IN for coin-cell monitoring (set to 2.2V); 140ms timeout ensures complete firmware save before power loss. Use Value: Guarantees nonvolatile memory integrity and prevents erroneous glucose readings during battery depletion. |
| Automotive Body Control Module | Networking Edge Router Power Sequencing |
Use Scenario: Validates 5V microcontroller supply and 12V sensor bias rail in a vehicle door module, rejecting load-dump transients while detecting sustained undervoltage. IC Role / Device Role / Timing Role: VCC monitors 5V rail (2.93V threshold), OVRST IN monitors 12V rail (set to 13.2V), and RST IN monitors 3.3V I/O rail (set to 3.0V). Use Value: Enables fail-safe door lock actuation by maintaining deterministic reset behavior despite automotive electrical noise and battery sag. |
Use Scenario: Coordinates startup of FPGA, PHY, and PMIC rails in a compact 5G small cell router, verifying each rail reaches regulation before releasing downstream reset. IC Role / Device Role / Timing Role: Uses RST IN to monitor 1.8V FPGA core, OVRST IN to monitor 3.3V PHY, and VCC (2.93V) for 3.3V system rail; 140ms timeout aligns with FPGA configuration window. Use Value: Eliminates need for discrete RC timers and sequencing ICs, reducing BOM count and PCB area in thermally constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK29D2-T | 20ms (min) reset timeout vs. 140ms - shorter assertion period | Suitable for faster-booting µPs where 20ms suffices; not compliant with legacy systems requiring ≥100ms | Select only if system reset timing budget permits shorter pulse width and validation confirms stability. |
| TPS3808G33DBVR | Fixed 3.08V threshold (not 2.93V); 200ms timeout; open-drain output (requires pull-up) | Lacks OVRST IN and RST IN inputs - single-rail monitoring only; different pinout and drive capability | Use only for simple VCC-only supervision where adjustable inputs and push/pull drive are unnecessary. |
Compared with MAX6307UK29D2-T and TPS3808G33DBVR, the MAX6307UK29D3-T uniquely combines factory-set 2.93V VCC supervision, dual adjustable inputs (RST IN/OVRST IN), 140ms timeout, and push/pull RESET in SOT23-5 - making it optimal for multirail systems needing precise, component-free, and noise-immune reset control.
Availability
MAX6307UK29D3-T is available at Aetrix Electronics and suitable for industrial PLC power monitoring, medical portable diagnostic devices, automotive body control modules, and networking edge router power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for MAX6307UK29D3-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, communications, and consumer applications.
The MAX6305–MAX6313 family was designed to provide compact, low-power, multirail supervisory solutions for space- and power-constrained embedded systems requiring precise, factory-calibrated reset thresholds and transient immunity.
FAQ
What is the factory-set VCC reset threshold for MAX6307UK29D3-T?
The MAX6307UK29D3-T has a factory-set VCC reset threshold of 2.93V, with a tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is derived from Table 1 in the datasheet, where "29" corresponds to 2.93V nominal, and the Electrical Characteristics table confirms the ±2.5% limit for MAX6307 variants. The threshold is implemented via an internal trimmed resistor divider and requires no external components.
What does the "D3" suffix indicate in MAX6307UK29D3-T?
The "D3" suffix in MAX6307UK29D3-T specifies a factory-programmed reset timeout period of 140ms (minimum). Per the Ordering Information section, D1 = 1ms min, D2 = 20ms min, D3 = 140ms min, and D4 = 1120ms min. This timeout is internally generated and guaranteed across temperature, eliminating the need for external RC timing networks in the MAX6307UK29D3-T design.
Does MAX6307UK29D3-T support overvoltage monitoring?
Yes, the MAX6307UK29D3-T supports overvoltage monitoring via its dedicated OVRST IN pin (Pin 3). When an external voltage applied to OVRST IN exceeds the internal 1.23V reference (set by an external resistor divider), the device asserts RESET. This function is explicitly confirmed in the Pin Description, Detailed Description, and Selector Table, distinguishing MAX6307/MAX6310/MAX6313 from other family members.
What is the operating VCC range for MAX6307UK29D3-T?
The MAX6307UK29D3-T operates with VCC from (VTH + 2.5%) to +5.5V, i.e., 3.0V to 5.5V minimum. This is specified in the Electrical Characteristics table under "VCC Range" and clarified in Note 2: for MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/MAX6313, VCC must exceed the factory threshold by at least 2.5% to ensure proper internal divider operation. Below 3.0V, the VCC monitor is not functional.
Is MAX6307UK29D3-T pin-compatible with other MAX630x SOT23-5 variants?
Yes, the MAX6307UK29D3-T shares the identical SOT23-5 pinout with all MAX6305–MAX6313 family members, as shown in the Pin Configurations diagram (page 10). Pin 1 is RESET, Pin 2 is GND, Pin 3 is OVRST IN, Pin 4 is RST IN, and Pin 5 is VCC. However, functionality differs across variants (e.g., MAX6305 lacks OVRST IN), so electrical compatibility depends on matching feature requirements, not just pin count or placement.
MAX6307UK29D3-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:
- 2.93V, 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
MAX6307UK29D3-T FAQ
1.How can I place an order for MAX6307UK29D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK29D3-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 MAX6307UK29D3-T reliable?
The price and inventory of MAX6307UK29D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK29D3-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK29D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK29D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK29D3-T?
MAX6307UK29D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK29D3-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 MAX6307UK29D3-T?
For technical support, including MAX6307UK29D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK29D3-T requirements.
6.How does Aetrix verify that MAX6307UK29D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK29D3-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 MAX6307UK29D3-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK29D3-T?
All MAX6307UK29D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK29D3-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 MAX6307UK29D3-T part is unused and in its original packaging.
Return procedure for MAX6307UK29D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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