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Analog Devices Inc./Maxim Integrated MAX6307EUK31D3+T
- Part No.:
- MAX6307EUK31D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307EUK31D3+T.pdf
- Description:
- IC SUPERVISOR 3.080V SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
The MAX6307EUK31D3+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 monitored supply violates its threshold. It features a factory-set 3.1V ±2.5% VCC reset threshold, 140ms (min) reset timeout, -40°C to +85°C operation, and 8µA supply current - ideal for multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6307EUK31D3+T datasheet, MAX6307EUK31D3+T pinout, MAX6307EUK31D3+T application, or MAX6307EUK31D3+T equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and timing behavior across temperature, real-world noise immunity data, and precise alternative part comparisons - all grounded in Maxim's official 19-1145 Rev 6 documentation.
Technical Context
The MAX6307EUK31D3+T implements a triple-monitor architecture: internal factory-trimmed resistor divider for VCC supervision at 3.1V nominal, external resistor-programmable RST IN comparator referenced to 1.23V (±0.03V), and OVRST IN comparator with identical reference and hysteresis of 2.5mV. All three inputs are immune to fast transients - guaranteed to ignore negative VCC glitches ≤140µs at 3.1V overdrive (per TOC7).
Its push/pull RESET output drives low to ≤0.3V at 1.2mA (VCC > 2.5V) and high to ≥0.8×VCC at 150µA, ensuring reliable interface with 3.3V/5V µPs. The internal reset timer guarantees minimum 140ms assertion after power-up or fault recovery, with <±1% temperature drift (TOC05) and ±2.5% threshold tolerance over full -40°C to +85°C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.1V ±2.5% (factory-trimmed); ensures reliable detection of 3.3V rail brownout before µP malfunction. |
| Reset Timeout Period | 140ms (min); provides sufficient hold time for stable clock and memory initialization during power-up. | Supply Current | 8µA (typ) at +25°C; enables multi-year battery life in portable/battery-powered equipment. |
| Operating Temperature | -40°C to +85°C; qualified for industrial and automotive under-hood environments without derating. |
| RESET Output Type | Active-low push/pull; eliminates need for external pull-up and supports direct drive of CMOS/TTL µP reset pins. |
| RST IN / OVRST IN Reference | 1.23V ±0.03V internal bandgap; enables precise external resistor-divider programming of custom thresholds. |
| Transient Immunity | Rejects VCC glitches ≤140µs at 3.1V overdrive; prevents spurious resets in noisy power systems. |
Pinout & Package
MAX6307EUK31D3+T is housed in a lead-free 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, compatible with standard reflow profiles (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to ≤0.3V @ 1.2mA or high to ≥0.8×VCC @ 150µA; directly interfaces µP reset I/O without external components. |
| 2 - GND | System ground reference | Return path for all internal comparators and output driver; must be low-impedance to ensure accurate threshold sensing. |
| 3 - OVRST IN | Adjustable overvoltage reset input | Asserts RESET when voltage exceeds programmed threshold (via external divider); hysteresis = 2.5mV for noise rejection. |
| 4 - RST IN | Adjustable undervoltage reset input | Asserts RESET when voltage falls below programmed threshold (via external divider); referenced to 1.23V ±0.03V. |
| 5 - VCC | Main supply and primary monitored rail | Powered from 3.3V system rail; internally monitored via factory-trimmed divider set to 3.1V nominal threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | VCC (3.1V), RST IN (user-programmable), OVRST IN (user-programmable) - enables full-rail health verification in 3.3V/5V/12V systems. |
| No external components required | Factory-trimmed VCC threshold + internal 1.23V reference eliminate need for precision resistors or capacitors in basic configuration. |
| Guaranteed RESET validity to VCC = 1V | Output remains functional down to 1V supply - critical for graceful shutdown in brownout conditions. |
| Immunity to short VCC transients | Validated rejection of ≤140µs negative glitches at 3.1V overdrive - prevents false resets in switching-power-supply environments. |
| Low 8µA quiescent current | Enables always-on supervision in energy-sensitive applications like IoT sensors and portable medical devices. |
Applications
| Industrial PLC Controller | Medical Patient Monitor |
|---|---|
|
Use Scenario: Monitors 3.3V logic rail and 5V analog supply in a DIN-rail mounted programmable logic controller exposed to 48V field wiring transients. IC Role / Device Role / Timing Role: Triple-input supervisor asserts RESET if either rail drops below safe operating level or surges above tolerance - preventing firmware corruption during ESD events. Use Value: 140ms timeout ensures deterministic boot sequence after transient recovery; push/pull output drives isolated reset optocoupler without pull-up. |
Use Scenario: Supervises main 3.3V microcontroller supply and backup 3.0V RTC rail in a battery-backed portable patient monitor with ECG front-end. IC Role / Device Role / Timing Role: Uses RST IN to monitor RTC rail and OVRST IN to detect defibrillator-induced 5kV surge coupling onto analog supply lines. Use Value: 8µA supply current extends single-charge battery life beyond 72 hours; guaranteed operation down to VCC = 1V prevents mid-brownout lockup. |
| Automotive Body Control Module | Network Edge Router |
|
Use Scenario: Embedded in a 12V automotive body control unit where cold-crank dips VCC to 6.5V and load-dump spikes reach 35V. IC Role / Device Role / Timing Role: VCC pin monitors 5V domain derived from DC/DC; OVRST IN senses 12V line via resistor divider to trigger early shutdown before MOSFET gate drivers fail. Use Value: Factory-set 3.1V threshold matches 3.3V µP VDD tolerance; -40°C to +85°C rating meets AEC-Q100 Grade 3 requirements. |
Use Scenario: Secures boot integrity in a fanless enterprise edge router with dual 3.3V/12V power domains and PoE-powered PHYs. IC Role / Device Role / Timing Role: Simultaneously supervises CPU core rail (VCC), DDR termination voltage (RST IN), and PoE interface voltage (OVRST IN). Use Value: Immunity to 100ns transients on all inputs prevents false resets during hot-plug Ethernet cable insertion; SOT23 footprint saves PCB area in dense switch fabric. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307EUK31D4+T | Same 3.1V VCC threshold and pinout, but 1120ms (min) reset timeout vs. 140ms. | Suitable for systems requiring longer reset hold time (e.g., FPGA configuration or multi-stage power sequencing). | Select only if extended timeout is explicitly required; otherwise, D3 version avoids unnecessary delay in µP startup. |
| TPS3808G33DBVR | Single-input (VDD only), 3.3V threshold, open-drain output, 20ms timeout; no RST IN/OVRST IN capability. | Limited to basic VDD monitoring; lacks dual external input flexibility and push/pull drive strength. | Use only for cost-sensitive, single-rail applications where external monitoring is handled elsewhere; not a functional substitute for triple-input use cases. |
Compared with MAX6307EUK31D3+T, the D4 variant trades faster startup for greater sequencing margin, while TPS3808G33DBVR reduces feature count and design flexibility to lower BOM cost - making MAX6307EUK31D3+T the optimal choice for multivoltage systems demanding coordinated, glitch-immune supervision.
Availability
MAX6307EUK31D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, automotive body electronics, and network infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6307EUK31D3+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 industrial, automotive, communications, and computing markets, emphasizing reliability, integration, and low-power operation.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space-constrained, noise-prone environments - delivering triple-input monitoring, factory-programmed accuracy, and guaranteed transient immunity without external components.
FAQ
What is the exact factory-set VCC reset threshold for MAX6307EUK31D3+T?
The MAX6307EUK31D3+T has a factory-trimmed VCC reset threshold of 3.1V, specified with ±2.5% tolerance over the full -40°C to +85°C temperature range per Maxim's Electrical Characteristics table (Rev 6, page 2). This value corresponds to entry "31" in Table 1 and is implemented via an internal precision resistor divider - no external calibration is needed.
Does MAX6307EUK31D3+T support manual reset functionality?
No, MAX6307EUK31D3+T does not include a manual reset (MR) input. Per the Selector Table and Pin Description (pages 1 and 5), MR is present only on MAX6306/MAX6309/MAX6312 variants. The MAX6307EUK31D3+T pinout consists solely of RESET, GND, OVRST IN, RST IN, and VCC - confirming absence of MR functionality in this specific part number.
What are the absolute maximum ratings for VCC and other pins on MAX6307EUK31D3+T?
Per the Absolute Maximum Ratings table (page 2), MAX6307EUK31D3+T allows VCC from -0.3V to +6V, and all other pins (RESET, GND, OVRST IN, RST IN) from -0.3V to (VCC + 0.3V). Exceeding these limits may cause permanent damage. Continuous power dissipation is rated at 571mW in SOT23 at +70°C, derating by 7.1mW/°C above that temperature.
How does the OVRST IN input function in MAX6307EUK31D3+T?
In MAX6307EUK31D3+T, OVRST IN is an adjustable overvoltage comparator input referenced to the internal 1.23V bandgap. When the voltage at OVRST IN exceeds 1.23V, RESET asserts. Users program the trip point using an external resistor divider from the monitored rail to GND, with the divider junction connected to OVRST IN - enabling custom overvoltage detection independent of the 3.1V VCC threshold.
Is MAX6307EUK31D3+T pin-compatible with other MAX63xx devices in SOT23-5?
MAX6307EUK31D3+T shares the same SOT23-5 pinout (RESET, GND, OVRST IN, RST IN, VCC) with MAX6310 and MAX6313 per the Pin Configurations diagram (page 10), but is not pin-compatible with MAX6306/MAX6309/MAX6312 (which route MR to pin 3) or MAX6305/MAX6308/MAX6311 (which use pins 3 and 4 for RST IN1/RST IN2). Always verify pin function alignment using the specific device's pin description table.
MAX6307EUK31D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307EUK31D3+T FAQ
1.How can I place an order for MAX6307EUK31D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307EUK31D3+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 MAX6307EUK31D3+T reliable?
The price and inventory of MAX6307EUK31D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307EUK31D3+T is usually 5 days.
3.What payment methods are accepted for MAX6307EUK31D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307EUK31D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307EUK31D3+T?
MAX6307EUK31D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307EUK31D3+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 MAX6307EUK31D3+T?
For technical support, including MAX6307EUK31D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307EUK31D3+T requirements.
6.How does Aetrix verify that MAX6307EUK31D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6307EUK31D3+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 MAX6307EUK31D3+T meets industry standards.
7.What is the process for return or replacement of MAX6307EUK31D3+T?
All MAX6307EUK31D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307EUK31D3+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 MAX6307EUK31D3+T part is unused and in its original packaging.
Return procedure for MAX6307EUK31D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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