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Analog Devices Inc./Maxim Integrated MAX6306UK44D3+
- Part No.:
- MAX6306UK44D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK44D3+.pdf
- Description:
- MAX6306 5-PIN, MULTIPLE-INPUT, P
- Quantity:
- Payment:
- Shipping:
Inventory:48,753
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Product details
Overview
MAX6306UK44D3+ from Maxim Integrated is a 5-pin SOT23 programmable microprocessor supervisory circuit that monitors VCC supply voltage and asserts an active-low push/pull reset signal when VCC falls below 4.38V (±2.5% over temperature), with factory-programmed 140ms minimum reset timeout, manual-reset input, and guaranteed RESET validity down to VCC = 1V. It targets multivoltage embedded systems requiring reliable power-on and brownout reset for 3.3V/5V mixed-rail applications.
For engineers reviewing the MAX6306UK44D3+ datasheet, MAX6306UK44D3+ pinout, MAX6306UK44D3+ application, or MAX6306UK44D3+ equivalent, this page delivers verified functional identity, confirmed SOT23-5 package mapping, validated 5-pin terminal roles, exact reset threshold and timeout values, and two rigorously cross-referenced alternative parts - all extracted from Maxim's official Rev 6 datasheet (19-1145) and ordering documentation.
Technical Context
The MAX6306UK44D3+ uses an internal factory-trimmed resistor divider to monitor VCC against a precision 4.38V threshold (nominal), with ±2.5% tolerance over -40°C to +85°C and 40ppm/°C drift. Its reset assertion logic guarantees valid output down to VCC = 1V and ignores transients shorter than ~200µs at 4.38V overdrive.
It integrates a manual-reset (MR) input with 63.5kΩ internal pull-up, TTL/CMOS-compatible logic thresholds, and 1.5µs minimum pulse width requirement. The device features no external components, operates from VCC = (VTH + 2.5%) to +5.5V, and draws only 8µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.38V nominal, ±2.5% over -40°C to +85°C - sets precise brownout detection point for 5V rail monitoring |
| Reset Timeout Period | 140ms minimum - ensures µP initialization completes before release of reset signal |
| Supply Current | 8µA typical at +25°C - enables battery-powered portable operation with minimal quiescent drain |
| Operating Voltage Range | VCC = 4.49V to +5.5V - derived from (VTH + 2.5%) minimum, ensuring stable internal reference operation |
| RESET Output Type | Active-low push/pull - drives high/low without external pull-up, compatible with bidirectional µP reset pins |
| MR Input Logic | VIH = 0.7×VCC (VTH < 4.0V), VIL = 0.3×VCC - supports direct interface to 3.3V or 5V logic without level shifters |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended-temperature embedded control environments |
Pinout & Package
MAX6306UK44D3+ is housed in a lead-free 5-pin SOT23-5 package (package code U5+1, outline 21-0057), with 1.3mm × 2.9mm footprint and 0.95mm height - suitable for space-constrained PCB layouts in portable and multivoltage systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low during reset assertion; sources current when deasserted - eliminates need for external pull-up resistor |
| 2 - GND | System ground reference | Common return path for internal comparators, MR input, and RESET driver - must be low-impedance |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors external rail via resistor divider; asserts reset if input falls below 1.23V reference - adds secondary supply monitoring |
| 4 - MR | Manual-reset input | Pull low to force reset; internal 63.5kΩ pull-up allows direct switch connection - enables operator-initiated system recovery |
| 5 - VCC | Main supply input and monitored rail | Power source and primary voltage under supervision; internal trimmed divider sets 4.38V threshold - defines operating range and reset trigger |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set precision reset threshold | 4.38V with ±2.5% tolerance over full temperature range - eliminates calibration overhead in production |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state even during deep brownout - prevents µP lockup during partial power loss |
| Immunity to fast VCC transients | Rejects negative-going glitches <200µs at 4.38V overdrive - avoids spurious resets in noisy power environments |
| No external components required | Integrates voltage reference, comparator, timer, and push/pull driver - reduces BOM count and layout area |
| Manual-reset input with internal pull-up | 63.5kΩ internal resistor enables momentary switch interface without discrete pull-up - simplifies front-panel design |
Applications
| Industrial PLC Controller | Medical Portable Monitor |
|---|---|
Use Scenario: A DIN-rail mounted programmable logic controller powers up from 24V DC converted to 5V/3.3V rails; brownout on 5V rail must trigger full system reset before firmware execution. IC Role / Device Role / Timing Role: Primary VCC supervisor for 5V rail, asserting active-low RESET to ARM Cortex-M7 MCU during startup and transient dips. Use Value: 4.38V threshold precisely matches 5V rail regulation margin; 140ms timeout exceeds bootloader initialization time; push/pull output drives MCU reset pin directly. |
Use Scenario: Battery-powered ECG monitor uses dual 3.3V/5V supplies; low-battery shutdown causes gradual 5V collapse requiring clean reset before data corruption. IC Role / Device Role / Timing Role: VCC monitor and reset generator for main 5V domain, coordinated with battery fuel gauge interrupt. Use Value: Guaranteed RESET validity down to VCC = 1V ensures reset remains asserted until power fully collapses; 8µA quiescent current extends battery life between measurements. |
| Automotive Infotainment Head Unit | Network Edge Router |
Use Scenario: 12V automotive supply feeds buck converters generating 5V and 3.3V; load dump transients and cold-crank dips demand robust reset immunity. IC Role / Device Role / Timing Role: Primary reset supervisor for 5V SoC domain, with MR input tied to service mode button for field diagnostics. Use Value: Immunity to sub-200µs VCC glitches prevents false resets during cranking; MR pin's 0.7×VCC VIH allows direct connection to 3.3V service logic. |
Use Scenario: Carrier-grade edge router with hot-swap power modules requires deterministic reset sequencing across multiple voltage domains during module insertion. IC Role / Device Role / Timing Role: Secondary supervisor for auxiliary 5V management ASIC, triggered via RST IN from primary 3.3V supervisor. Use Value: Adjustable RST IN input enables cascaded reset coordination; SOT23-5 footprint fits dense power management layout near VRMs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK44D2+ | 20ms minimum reset timeout vs. 140ms - faster release but insufficient for slow-booting µPs | Preferred in cost-sensitive consumer devices with rapid boot sequences | Select only if system boot time <15ms; otherwise risk premature release causing firmware crash |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.8–6V VCC range - no manual reset or adjustable inputs | Suitable for single-rail 3.3V systems without MR or secondary monitoring needs | Choose when simplicity and TI supply chain alignment outweigh multi-rail flexibility |
Compared with MAX6306UK44D2+, the MAX6306UK44D3+ provides longer reset hold time critical for complex firmware initialization; versus TPS3808G33DBVR, it offers manual reset and dual-supply monitoring capability essential for multivoltage industrial designs.
Availability
MAX6306UK44D3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical portable monitors, automotive infotainment head units, network edge routers, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6306UK44D3+ 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 analog and mixed-signal ICs for power management, sensing, and interface applications - with emphasis on high-reliability, low-power solutions.
The MAX6305–MAX6313 family was designed specifically for multivoltage microprocessor supervision in space- and power-constrained embedded systems, delivering precision reset timing, transient immunity, and flexible input configurations without external components.
FAQ
What is the exact factory-programmed reset threshold voltage for MAX6306UK44D3+?
The MAX6306UK44D3+ has a factory-programmed VCC reset threshold of 4.38V nominal, with ±2.5% tolerance over the full -40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the Maxim datasheet (Rev 6, 19-1145), where "44" in the part number corresponds to 4.38V. The device uses an internal trimmed resistor divider to achieve this precision without external components.
Does MAX6306UK44D3+ support manual reset functionality, and how is it implemented?
Yes, MAX6306UK44D3+ includes a dedicated MR (manual-reset) input on pin 4. Pulling MR low forces an immediate reset assertion, which remains active for the full 140ms timeout period after MR returns high. The pin features an internal 63.5kΩ pull-up resistor, allowing direct connection to a normally open momentary switch tied to GND - no external components are needed for basic manual reset implementation.
What is the minimum VCC voltage at which MAX6306UK44D3+ guarantees valid RESET output?
MAX6306UK44D3+ guarantees valid RESET output down to VCC = 1V, as explicitly stated in the datasheet's "Features" section and confirmed in Electrical Characteristics. Below 1V, the push/pull driver's sourcing/sinking capability degrades, but the device remains functional and asserts RESET correctly throughout its specified operating range of VCC = 4.49V to +5.5V.
Can MAX6306UK44D3+ monitor voltages other than VCC, and if so, how?
Yes, MAX6306UK44D3+ includes an adjustable RST IN input (pin 3) that monitors external supplies using an external resistor divider. The internal 1.23V reference compares against the divided voltage; when the input falls below 1.23V, reset is asserted. This enables supervision of secondary rails like 3.3V or 2.5V independently of the primary VCC (5V) monitoring function.
What package type and RoHS status does MAX6306UK44D3+ use?
MAX6306UK44D3+ is supplied in a lead-free 5-pin SOT23-5 package (Maxim package code U5+1, outline 21-0057). The "+" suffix in the part number explicitly denotes RoHS-compliant, lead-free construction per Maxim's ordering conventions - verified in the "Ordering Information" and "Package Information" sections of the datasheet.
MAX6306UK44D3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.38V, 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
MAX6306UK44D3+ FAQ
1.How can I place an order for MAX6306UK44D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK44D3+ 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 MAX6306UK44D3+ reliable?
The price and inventory of MAX6306UK44D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK44D3+ is usually 5 days.
3.What payment methods are accepted for MAX6306UK44D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK44D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK44D3+?
MAX6306UK44D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK44D3+ 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 MAX6306UK44D3+?
For technical support, including MAX6306UK44D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK44D3+ requirements.
6.How does Aetrix verify that MAX6306UK44D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6306UK44D3+ 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 MAX6306UK44D3+ meets industry standards.
7.What is the process for return or replacement of MAX6306UK44D3+?
All MAX6306UK44D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK44D3+, 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 MAX6306UK44D3+ part is unused and in its original packaging.
Return procedure for MAX6306UK44D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6306UK44D3+ Tags
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