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Analog Devices Inc./Maxim Integrated MAX6307UK34D3-T
- Part No.:
- MAX6307UK34D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK34D3-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,427
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Product details
Overview
The MAX6307UK34D3-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set at 3.4V ±2.5%), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN), asserting an active-low open-drain RESET output when any threshold is violated. It features a 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 MAX6307UK34D3-T datasheet, MAX6307UK34D3-T pinout, MAX6307UK34D3-T application, or MAX6307UK34D3-T equivalent, key selection criteria include its dual external reset inputs (RST IN/OVRST IN), factory-trimmed 3.4V VCC threshold, 140ms timeout, SOT23-5 package compatibility, and immunity to fast VCC transients - critical for reliable power sequencing in portable and industrial controllers.
Technical Context
The MAX6307UK34D3-T implements a triple-monitor architecture: internal factory-trimmed voltage divider for VCC supervision at 3.4V, external resistor-divider–based comparator for RST IN (undervoltage), and another for OVRST IN (overvoltage), all referenced to a stable 1.23V internal bandgap. Its reset generator enforces a fixed 140ms minimum timeout after all monitored voltages return to regulation.
It uses an open-drain RESET output with guaranteed VOL ≤ 0.3V at ISINK = 500µA and VCC > 1.8V, and supports manual reset assertion via MR pin (internal 63.5kΩ pull-up). The device operates across 0°C to +70°C and draws only 8µA typical supply current, enabling battery-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.4V ±2.5% (factory-trimmed); ensures precise 3.3V system brownout detection with margin |
| Reset Timeout Period | 140ms minimum (D3 variant); guarantees µP initialization time meets ARM Cortex-M or PIC timing requirements |
| Supply Current | 8µA typical at VCC = 5.5V; enables multi-year operation on coin-cell batteries in portable instrumentation |
| RESET Output Type | Active-low open-drain; allows wired-OR with other supervisors and direct interface to bidirectional µP reset pins |
| Operating Temperature | 0°C to +70°C; suitable for commercial-grade industrial HMI and PC peripheral designs |
| Input Voltage Range | VCC = (VTH + 2.5%) to +5.5V = 3.485V to +5.5V; defines valid supply window for reliable monitoring |
| RST IN / OVRST IN Threshold | 1.23V ±0.03V reference; enables accurate external voltage monitoring using standard resistor dividers |
Pinout & Package
MAX6307UK34D3-T is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts and compatible with standard high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives low during fault; requires external pull-up; interfaces directly with µP reset I/O without level-shifting |
| 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 external voltage exceeds programmed threshold (via resistor divider to 1.23V ref) |
| 4 - RST IN | Adjustable undervoltage reset input | Asserts RESET when external voltage falls below programmed threshold (via resistor divider to 1.23V ref) |
| 5 - VCC | Main supply and primary monitored rail | Supplies IC and feeds internal 3.4V threshold monitor; must exceed 3.485V for valid operation |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | VCC (3.4V), RST IN (user-programmable undervoltage), OVRST IN (user-programmable overvoltage) - enables full rail health coverage in 3.3V/5V hybrid systems |
| Transient immunity | Immune to VCC transients <140µs at 3.4V overdrive; eliminates false resets from switching noise or ESD coupling |
| No external components required | Factory-programmed thresholds and timeout eliminate need for capacitors, resistors, or trimming - reduces BOM count and layout area |
| Guaranteed RESET down to VCC = 1V | Ensures deterministic reset assertion during deep brownout, preventing µP lockup before complete power collapse |
| Low quiescent current | 8µA typical ICC enables integration into always-on subsystems (e.g., RTC backup domain, wake-on-event logic) |
Applications
| Industrial PLC I/O Module | Medical Portable Monitor |
|---|---|
Use Scenario: Monitors 3.3V logic rail and 5V analog sensor supply while detecting overvoltage on isolated CAN transceiver rail. IC Role / Device Role / Timing Role: Triple-rail supervisor ensuring coordinated reset of MCU, ADC, and communication PHY during power faults. Use Value: Prevents data corruption by holding MCU in reset until both digital and analog domains stabilize post-brownout. |
Use Scenario: Supervises main 3.3V microcontroller supply and backup 3V coin-cell rail, while monitoring overvoltage on ECG front-end amplifier supply. IC Role / Device Role / Timing Role: Fault-tolerant reset controller with dual-supply awareness and fail-safe overvoltage protection. Use Value: Guarantees safe shutdown and restart sequence compliant with IEC 62304 Class B software safety requirements. |
| Automotive Body Control Module | Network Edge Gateway |
Use Scenario: Tracks 3.3V MCU core voltage and 5V LIN transceiver supply, with RST IN monitoring 12V battery-derived 5V DC/DC output. IC Role / Device Role / Timing Role: Multi-input supervisor providing reset coordination across heterogeneous voltage domains in harsh automotive environments. Use Value: Eliminates need for discrete voltage detectors and RC timers, reducing component count and improving thermal reliability. |
Use Scenario: Monitors 3.3V SoC supply and 5V USB-C PD port voltage, with OVRST IN guarding against 20V USB PD negotiation spikes. IC Role / Device Role / Timing Role: Dual-threshold supervisor enabling simultaneous undervoltage and overvoltage fault detection on shared power rails. Use Value: Enables automatic graceful shutdown before overvoltage damages Ethernet PHY or Wi-Fi SoC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK34D2-T | Same 3.4V VCC threshold and pinout, but 20ms reset timeout (vs. 140ms) | Suitable for faster-booting microcontrollers where extended reset hold time is unnecessary | Select when shorter reset duration satisfies µP tRST requirement and reduces system startup latency |
| TPS3808G33DBVR | 3.3V fixed threshold, push-pull RESET output, no OVRST IN, 200ms timeout, 1.6µA ICC | Lacks overvoltage monitoring and adjustable inputs; optimized for ultra-low-power single-rail systems | Choose for cost-sensitive, single-supply applications where overvoltage detection is handled externally |
Compared with MAX6307UK34D2-T and TPS3808G33DBVR, the MAX6307UK34D3-T uniquely delivers triple-input supervision (VCC + RST IN + OVRST IN) with 140ms timeout in SOT23-5 - making it the only option among the three capable of comprehensive rail health monitoring in compact multivoltage designs.
Availability
MAX6307UK34D3-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body electronics, and network edge gateways requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MAX6307UK34D3-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 precision analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6305–MAX6313 family was designed to provide highly configurable, low-power supervisory solutions for multivoltage embedded systems - addressing the need for flexible reset generation without external passive components.
FAQ
What is the factory-programmed VCC reset threshold for MAX6307UK34D3-T?
The MAX6307UK34D3-T has a factory-programmed VCC reset threshold of 3.4V, with a tolerance of ±2.5% over the 0°C to +70°C temperature range. This value is trimmed internally using a precision voltage divider and is confirmed in the Electrical Characteristics table of the MAX6305–MAX6313 datasheet. The "34" in the part number explicitly denotes the 3.4V nominal threshold.
Does MAX6307UK34D3-T support overvoltage detection?
Yes, the MAX6307UK34D3-T supports overvoltage detection via its dedicated OVRST IN pin. When an external voltage applied to OVRST IN exceeds the internal 1.23V reference (set by a resistor divider), the device asserts RESET. This capability is confirmed in the Pin Description, Functional Diagram, and Applications Information sections of the datasheet - distinguishing it from variants like MAX6306 that lack OVRST IN.
What is the reset timeout period for MAX6307UK34D3-T?
The MAX6307UK34D3-T has a factory-programmed reset timeout period of 140ms minimum (D3 suffix), as defined in the Ordering Information section. This timeout begins after all monitored supplies (VCC, RST IN, OVRST IN) return within their respective thresholds and ensures the microprocessor remains held in reset long enough for stable clock and power rail establishment.
Is MAX6307UK34D3-T compatible with 3.3V microcontroller reset inputs?
Yes, the MAX6307UK34D3-T is fully compatible with 3.3V microcontrollers. Its open-drain RESET output can be pulled up to 3.3V, and its guaranteed VOL ≤ 0.3V at ISINK = 500µA ensures solid logic-low assertion. Additionally, its VCC operating range starts at 3.485V (3.4V + 2.5%), making it ideal for monitoring 3.3V systems with appropriate headroom.
What package type does MAX6307UK34D3-T use?
The MAX6307UK34D3-T uses a 5-pin SOT23 package (package code U5+1), as specified in the Package Information section and confirmed in the Pin Configurations diagram. This surface-mount package measures 2.9mm × 1.6mm × 1.1mm and is compatible with standard reflow soldering profiles, including lead-free assembly (indicated by the "-T" suffix).
MAX6307UK34D3-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:
- 3.4V, 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
MAX6307UK34D3-T FAQ
1.How can I place an order for MAX6307UK34D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK34D3-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 MAX6307UK34D3-T reliable?
The price and inventory of MAX6307UK34D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK34D3-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK34D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK34D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK34D3-T?
MAX6307UK34D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK34D3-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 MAX6307UK34D3-T?
For technical support, including MAX6307UK34D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK34D3-T requirements.
6.How does Aetrix verify that MAX6307UK34D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK34D3-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 MAX6307UK34D3-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK34D3-T?
All MAX6307UK34D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK34D3-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 MAX6307UK34D3-T part is unused and in its original packaging.
Return procedure for MAX6307UK34D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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