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Analog Devices Inc./Maxim Integrated MAX6306UK31D4+T
- Part No.:
- MAX6306UK31D4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK31D4+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,712
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Product details
Overview
The MAX6306UK31D4+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC supply voltage and provides a push/pull active-low reset output. It features a factory-set 3.1V reset threshold (±2.5% over temperature), 1120ms minimum reset timeout, manual reset input (MR), and guaranteed RESET assertion down to VCC = 1V. Designed for multivoltage embedded systems, it ensures reliable power-on reset in portable computers and industrial controllers.
For engineers reviewing the MAX6306UK31D4+T datasheet, MAX6306UK31D4+T pinout, MAX6306UK31D4+T application, or MAX6306UK31D4+T equivalent, key selection criteria include its 3.1V VCC monitoring threshold, 1120ms factory-programmed timeout, MR input compatibility with TTL/CMOS logic, immunity to fast VCC transients, and guaranteed operation across 0°C to +70°C.
Technical Context
The MAX6306UK31D4+T uses an internal factory-trimmed resistor divider to monitor VCC against a precision 1.23V reference, enabling accurate 3.1V threshold detection. Its reset generator incorporates a monolithic timer with four selectable timeout periods-this part is configured for D4 (1120ms min) -and asserts RESET low until all monitored conditions stabilize.
It integrates a manual-reset input (MR) with internal 63.5kΩ pull-up, supporting direct switch connection without external components. The device ignores short-duration negative-going VCC transients (e.g., <1µs at 3.1V–2.5V overdrive) and guarantees valid RESET output down to VCC = 1V, making it suitable for brownout-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.1V ±2.5% over -0°C to +70°C - sets precise undervoltage detection point for 3.3V systems |
| Reset Timeout Period | 1120ms (min) - ensures µP remains held in reset long enough for stable power rail settling |
| Supply Current | 8µA (typ) at +25°C - enables battery-powered operation with minimal quiescent drain |
| RESET Output Type | Active-low push/pull - drives high/low without external pull-up, compatible with bidirectional µP reset pins |
| MR Input Logic | TTL/CMOS-compatible with 0.3×VCC/0.7×VCC thresholds - supports direct interface to 3V or 5V logic |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and computing environments |
| VCC Range | 3.178V to +5.5V - requires VCC ≥ threshold +2.5% for valid monitoring, ensuring clean startup behavior |
Pinout & Package
MAX6306UK31D4+T is housed in a lead-free 5-pin SOT23 package (outline U5+1), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated PCB assembly and thermal performance in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low during reset; sources current when deasserted - eliminates need for external pull-up resistor |
| 2 - GND | System ground reference | Return path for internal comparators and reset driver; must be connected to main system ground plane |
| 3 - RST IN | Adjustable undervoltage reset input | Accepts external resistor divider to monitor secondary supply (e.g., 1.8V rail); threshold = 1.23V × (R1+R2)/R2 |
| 4 - MR | Manual reset input | Pull low to force reset; internal 63.5kΩ pull-up allows direct switch-to-ground connection without external components |
| 5 - VCC | Main supply input and monitored rail | Power source and primary voltage under supervision; internal trimmed divider sets 3.1V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 3.1V threshold | Eliminates external resistor network and calibration effort for 3.3V system supervision |
| 1120ms minimum reset timeout | Guarantees sufficient hold time for slow-ramping supplies or complex power sequencing |
| Immunity to fast VCC transients | Rejects sub-microsecond glitches without false resets - critical in noisy switching power environments |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state during deep brownout, preventing µP runaway before full power loss |
| No external components required | Reduces BOM count and board area - MR, RESET, and VCC monitoring fully self-contained |
Applications
| Portable Computers | Industrial Controllers |
|---|---|
Use Scenario: Power management in fanless notebooks with dual 5V/3.3V rails and battery backup. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V core logic, asserting reset if main supply dips below 3.1V during battery switchover. Use Value: Prevents firmware corruption by holding CPU in reset until both rails stabilize post-battery transition. |
Use Scenario: PLC I/O module with isolated 24V field power and 5V logic supply subject to EMI-induced dips. IC Role / Device Role / Timing Role: Monitors 5V logic rail and provides 1120ms reset hold to tolerate transient coupling from adjacent motor drivers. Use Value: Maintains deterministic restart after EMI events without requiring watchdog intervention or manual recovery. |
| Intelligent Instruments | Multivoltage Embedded Systems |
Use Scenario: Handheld multimeter with 3.3V MCU, 1.8V ADC, and 5V display backlight. IC Role / Device Role / Timing Role: Supervises 3.3V MCU supply while using RST IN to monitor 1.8V ADC rail via external divider. Use Value: Enables single-chip supervision of two critical rails - reducing component count vs. dual discrete supervisors. |
Use Scenario: Automotive infotainment head unit with 12V input, 5V intermediate, and 3.3V/1.2V digital domains. IC Role / Device Role / Timing Role: Provides primary reset for 3.3V domain while MR input accepts reset command from vehicle CAN gateway. Use Value: Allows centralized system-level reset coordination without adding dedicated logic or microcontroller overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK31D3+T | Same 3.1V threshold but 140ms min reset timeout (vs. 1120ms) | Suitable for faster-booting systems where shorter reset hold is acceptable | Select when system power rails settle quickly and longer timeout adds unnecessary boot delay |
| TPS3808G31DBVR | 3.08V threshold (±0.5%), 1400ms timeout, 2.5µA ICC, SOT23-5 | Lower quiescent current and tighter threshold tolerance; requires external pull-up for open-drain output | Choose for ultra-low-power battery applications where 0.02V threshold offset is acceptable and layout allows pull-up |
Compared with MAX6306UK31D3+T, the MAX6306UK31D4+T provides significantly longer reset hold time for robust power sequencing; versus TPS3808G31DBVR, it offers integrated push/pull output eliminating external components but consumes slightly more supply current.
Availability
MAX6306UK31D4+T is available at Aetrix Electronics and suitable for portable computers, industrial controllers, and intelligent instruments requiring stable component supply with guaranteed lead-free compliance and tape-and-reel packaging.
Supply support for MAX6306UK31D4+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 interface applications in industrial, computing, and automotive markets.
The MAX6305–MAX6313 family delivers highly integrated, factory-programmed supervisory circuits targeting multivoltage embedded systems where reliability, small size, and zero-external-component operation are essential.
FAQ
What is the exact reset threshold voltage of the MAX6306UK31D4+T?
The MAX6306UK31D4+T has a factory-trimmed nominal reset threshold of 3.1V, with a tolerance of ±2.5% over the operating temperature range of 0°C to +70°C. This value is set by an internal precision voltage divider and is confirmed in the Electrical Characteristics table of the official datasheet (Rev 6, July 2012). The MAX6306UK31D4+T is specifically designed for reliable supervision of 3.3V supply rails.
Does the MAX6306UK31D4+T require external components to operate?
No, the MAX6306UK31D4+T operates autonomously with no external components required. Its 3.1V reset threshold, 1120ms timeout, MR input pull-up (63.5kΩ), and push/pull RESET output are all internally implemented. External resistors are only needed if using the RST IN pin to monitor a secondary supply - the MAX6306UK31D4+T itself functions fully with just VCC, GND, and load connections.
What is the function of the MR pin on the MAX6306UK31D4+T?
The MR (Manual Reset) pin on the MAX6306UK31D4+T is an active-low input that forces a system reset when pulled below its logic threshold (0.3×VCC). RESET remains asserted while MR is low and continues for the full 1120ms timeout after MR returns high. An internal 63.5kΩ pull-up resistor allows direct connection of a momentary switch to GND - no external pull-up or debounce circuitry is needed for standard use of the MAX6306UK31D4+T.
Can the MAX6306UK31D4+T monitor voltages other than VCC?
Yes, the MAX6306UK31D4+T includes a dedicated RST IN pin that accepts an external resistor divider to monitor a secondary supply rail. When used with a properly calculated divider, this pin compares the divided voltage to an internal 1.23V reference, enabling supervision of voltages such as 1.8V, 2.5V, or 5V independently of the 3.1V VCC threshold. This dual-monitoring capability is a defined feature of the MAX6306UK31D4+T per its functional description and pin configuration.
What package type and RoHS status does the MAX6306UK31D4+T use?
The MAX6306UK31D4+T is supplied in a lead-free 5-pin SOT23 package (package code U5+1, outline 21-0057), compliant with RoHS Directive 2011/65/EU. The "+T" suffix explicitly denotes lead-free termination, and the device is shipped in tape-and-reel format only. Its compact 2.9mm × 1.6mm footprint supports high-density PCB layouts typical in portable and embedded designs using the MAX6306UK31D4+T.
MAX6306UK31D4+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:
- 3.08V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6306UK31D4+T FAQ
1.How can I place an order for MAX6306UK31D4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK31D4+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 MAX6306UK31D4+T reliable?
The price and inventory of MAX6306UK31D4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK31D4+T is usually 5 days.
3.What payment methods are accepted for MAX6306UK31D4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK31D4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK31D4+T?
MAX6306UK31D4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK31D4+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 MAX6306UK31D4+T?
For technical support, including MAX6306UK31D4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK31D4+T requirements.
6.How does Aetrix verify that MAX6306UK31D4+T is sourced from the original manufacturer or authorized distributors?
All MAX6306UK31D4+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 MAX6306UK31D4+T meets industry standards.
7.What is the process for return or replacement of MAX6306UK31D4+T?
All MAX6306UK31D4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK31D4+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 MAX6306UK31D4+T part is unused and in its original packaging.
Return procedure for MAX6306UK31D4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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