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Analog Devices Inc./Maxim Integrated MAX6306UK30D2+T
- Part No.:
- MAX6306UK30D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK30D2+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
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Product details
Overview
MAX6306UK30D2+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC supply voltage and asserts an active-low push/pull reset signal when VCC falls below its factory-trimmed 3.0V threshold (±2.5% over temperature), with a guaranteed minimum 20ms reset timeout period, 8µA supply current, and valid reset assertion down to VCC = 1V. It is used in portable computers and multivoltage embedded systems for reliable power-on and brownout reset generation.
For engineers reviewing the MAX6306UK30D2+T datasheet, MAX6306UK30D2+T pinout, MAX6306UK30D2+T application, or MAX6306UK30D2+T equivalent, this page delivers verified technical context, precise pin-level design meaning, real-world application mappings, and validated alternative options - all grounded in Maxim's official documentation for the exact part number.
Technical Context
The MAX6306UK30D2+T implements a factory-trimmed internal voltage divider to monitor VCC against a precision 3.0V reset threshold, with ±2.5% tolerance across –40°C to +85°C. Its reset output is push/pull (active-low), eliminating external pull-up requirements and enabling direct interface with microcontroller reset inputs.
It includes a manual-reset input (MR) with internal 63.5kΩ pull-up, TTL/CMOS-compatible logic thresholds, and guaranteed 1.5µs minimum pulse width immunity. The device ignores fast VCC transients and maintains guaranteed RESET validity down to VCC = 1V - critical for stable boot sequencing in battery-powered equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.0V nominal, ±2.5% over –40°C to +85°C - sets precise undervoltage detection point for 3.3V system rails |
| Reset Timeout Period | 20ms minimum - ensures sufficient hold time for microprocessor initialization after power stabilization |
| Supply Current | 8µA typical at +25°C - enables ultra-low-power operation in portable/battery-powered designs |
| RESET Output Type | Active-low push/pull - drives reset line directly without external pull-up resistor; sinks 3.2mA at VCC > 4.25V |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| MR Input Pull-up | 63.5kΩ internal - allows direct connection of momentary switch to GND without external components |
| VCC Validity Range | Guaranteed RESET assertion down to VCC = 1V - ensures deterministic reset behavior during deep brownout |
Pinout & Package
MAX6306UK30D2+T is housed in a lead-free 5-pin SOT23 package (outline 21-0057), optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microcontroller reset pin low during fault; no external pull-up needed; sinks 3.2mA at VCC > 4.25V |
| 2 - GND | System ground reference | Return path for internal comparators, MR input, and RESET output; must be low-impedance for noise immunity |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors secondary supply via external resistor divider; asserts reset if input falls below 1.23V reference |
| 4 - MR | Manual-reset input | Pull low to force reset; internal 63.5kΩ pull-up allows switch-to-GND implementation; 1.5µs glitch rejection |
| 5 - VCC | Main supply input and monitored rail | Power source and primary voltage under supervision; internal trimmed divider sets 3.0V reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 3.0V reset threshold | Eliminates external resistor network; ±2.5% accuracy over full industrial temperature range |
| 20ms minimum reset timeout | Ensures µP completes power-up sequence before release; avoids premature execution during rail settling |
| Push/pull RESET output | Removes dependency on external pull-up resistor; reduces BOM count and layout area in compact designs |
| Manual-reset input with internal pull-up | Enables hardware-initiated reset using only a momentary switch; no external biasing required |
| Immunity to short VCC transients | Rejects sub-microsecond glitches - prevents spurious resets in noisy or switching-power-supply environments |
Applications
| Portable Computers | Industrial Controllers |
|---|---|
Use Scenario: Power management in clamshell laptops with dual 5V/3.3V rails and battery-backed operation. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V core logic; asserts RESET during AC adapter disconnect or battery sag. Use Value: Prevents corrupted firmware execution by holding µP in reset until 3.3V stabilizes above 3.0V for ≥20ms. |
Use Scenario: PLC I/O module with isolated 24V field power and 5V logic supply subject to load-switching transients. IC Role / Device Role / Timing Role: Monitors 5V logic rail and provides clean reset to ARM Cortex-M4 processor during field-side surges. Use Value: Push/pull output drives reset line robustly despite shared ground noise; MR pin enables operator-initiated diagnostics reset. |
| Multivoltage Embedded Systems | Battery-Powered Instrumentation |
Use Scenario: Medical sensor node with 3.3V MCU, 1.8V ADC, and 5V analog front-end powered from single Li-ion cell. IC Role / Device Role / Timing Role: Supervises 3.3V domain while RST IN monitors 1.8V rail via resistor divider; generates coordinated reset. Use Value: Single IC replaces two discrete supervisors; 8µA quiescent current extends battery life between calibrations. |
Use Scenario: Handheld gas analyzer with cold-start requirement below 2.5V and intermittent wake-up cycles. IC Role / Device Role / Timing Role: Ensures µP remains held in reset until VCC rises above 3.0V and stays valid down to 1.0V during discharge. Use Value: Guaranteed RESET assertion at VCC = 1V prevents undefined state during deep brownout - critical for data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK30D3+T | Same 3.0V threshold and package, but 140ms minimum reset timeout (vs. 20ms) | Suitable for systems requiring longer reset hold time, e.g., FPGA configuration or EEPROM write cycles | Select when extended reset duration is needed; not drop-in for timing-critical 20ms boot sequences |
| TPS3808G30DBVR | 3.0V threshold, 20ms timeout, but open-drain output (requires external pull-up) and 1.5µA max ICC | Better suited for ultra-low-power IoT nodes where <2µA supply current is mandatory | Choose for lowest power; accept added BOM cost/layout complexity of pull-up resistor and verify MR compatibility |
Compared with MAX6306UK30D2+T, the D3 variant trades shorter reset hold time for longer timeout, while TPS3808G30DBVR reduces supply current by >80% but requires external biasing and lacks integrated MR pull-up - impacting bill-of-materials and board space in compact designs.
Availability
MAX6306UK30D2+T is available at Aetrix Electronics and suitable for portable computers, industrial controllers, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6306UK30D2+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space- and power-constrained systems, delivering factory-programmable thresholds, minimal external components, and robust transient immunity.
FAQ
What is the factory-set reset threshold voltage for MAX6306UK30D2+T?
The MAX6306UK30D2+T has a factory-trimmed nominal reset threshold of 3.0V, with ±2.5% tolerance over the full operating temperature range of –40°C to +85°C. This value is set by an internal precision voltage divider and is confirmed in Maxim's official datasheet revision 6 (page 2, Electrical Characteristics table). The "30" in the part number explicitly denotes the 3.0V threshold.
Does MAX6306UK30D2+T require an external pull-up resistor on the RESET pin?
No, MAX6306UK30D2+T does not require an external pull-up resistor because it features an active-low push/pull RESET output. The internal driver can both sink (up to 3.2mA at VCC > 4.25V) and source current, enabling direct connection to a microcontroller reset input. This eliminates BOM items and layout overhead - a key differentiator from open-drain alternatives like the MAX6305 series.
What is the minimum reset timeout period specified for MAX6306UK30D2+T?
The MAX6306UK30D2+T has a factory-programmed minimum reset timeout period of 20ms, denoted by the "D2" suffix in the part number. This is guaranteed across temperature and supply voltage per the datasheet's Electrical Characteristics table (page 2), where tRP for D2 is listed as 20ms (min), 28ms (typ), and 40ms (max). It ensures sufficient hold time for most 32-bit microcontrollers to complete power-up initialization.
Can MAX6306UK30D2+T monitor a second voltage rail besides VCC?
Yes, MAX6306UK30D2+T includes an adjustable undervoltage reset input (RST IN, Pin 3) that can monitor a secondary supply rail - such as 1.8V or 2.5V - using an external resistor divider. The internal reference is 1.23V, so the divider sets the trip point. This capability is documented in the "Adjustable Reset Inputs" section (page 6) and functional diagram (page 6), distinguishing it from single-rail-only supervisors.
Is the manual-reset input (MR) on MAX6306UK30D2+T internally pulled up?
Yes, the MR pin (Pin 4) of MAX6306UK30D2+T includes an internal 63.5kΩ pull-up resistor to VCC, as specified in the Electrical Characteristics table (page 3). This allows direct connection of a normally-open momentary switch between MR and GND - no external components are needed. The datasheet confirms TTL/CMOS compatibility and 1.5µs minimum pulse width immunity for noise rejection.
MAX6306UK30D2+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:
- 3V, 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
MAX6306UK30D2+T FAQ
1.How can I place an order for MAX6306UK30D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK30D2+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 MAX6306UK30D2+T reliable?
The price and inventory of MAX6306UK30D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK30D2+T is usually 5 days.
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MAX6306UK30D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK30D2+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 MAX6306UK30D2+T?
For technical support, including MAX6306UK30D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK30D2+T requirements.
6.How does Aetrix verify that MAX6306UK30D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6306UK30D2+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 MAX6306UK30D2+T meets industry standards.
7.What is the process for return or replacement of MAX6306UK30D2+T?
All MAX6306UK30D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK30D2+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 MAX6306UK30D2+T part is unused and in its original packaging.
Return procedure for MAX6306UK30D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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