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Analog Devices Inc./Maxim Integrated MAX6306UK25D3+T
- Part No.:
- MAX6306UK25D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK25D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
MAX6306UK25D3+T from Maxim Integrated is a 5-pin SOT23 programmable microprocessor supervisory circuit that monitors VCC and asserts an active-low push/pull RESET output when supply voltage falls below its factory-set 2.5V threshold. It features a 140ms (min) reset timeout, manual-reset input (MR), and guaranteed RESET validity down to VCC = 1V. Designed for multivoltage systems, it ensures reliable power-on reset in portable computers and embedded controllers.
For engineers reviewing the MAX6306UK25D3+T datasheet, MAX6306UK25D3+T pinout, MAX6306UK25D3+T application, or MAX6306UK25D3+T equivalent, key selection considerations include its 2.5V ±2.5% reset threshold over temperature, 8µA supply current, immunity to fast VCC transients, and compatibility with 3.3V/5V dual-rail systems requiring deterministic reset timing and manual intervention capability.
Technical Context
The MAX6306UK25D3+T uses an internal factory-trimmed resistor divider to monitor VCC against a precision 2.5V threshold, with ±2.5% tolerance over -40°C to +85°C. Its reset timeout is fixed at 140ms (minimum), generated by an on-chip RC timer independent of external components.
It integrates a manual-reset input (MR) with 63.5kΩ internal pull-up, TTL/CMOS-compatible logic thresholds, and guarantees RESET assertion for VCC ≥ 1V. The device ignores short-duration negative-going VCC transients-up to ~200µs for 100mV overdrive-due to built-in glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.5V ±2.5% over -40°C to +85°C - sets precise brownout detection point for 3.3V systems |
| Reset Timeout Period | 140ms (min) - ensures µP initialization completes before release, no external capacitor needed |
| Supply Current | 8µA (typ) at +25°C - enables battery longevity in portable equipment |
| RESET Output Type | Active-low push/pull - drives logic inputs directly without external pull-up |
| MR Input Logic | VIH = 0.7×VCC (VTH < 4.0V); VIL = 0.3×VCC - supports direct connection to 3.3V or 5V logic |
| Operating Voltage Range | VCC = (2.5V + 2.5%) to +5.5V - valid operation starts at ~2.56V, avoids false resets during ramp-up |
| Reset Propagation Delay | <500ns MR-to-RESET - enables immediate system-level reset initiation |
Pinout & Package
MAX6306UK25D3+T is housed in a lead-free 5-pin SOT23 package (outline U5+1), 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 µP reset pin directly; sinks 3.2mA @ VCC > 4.25V; valid down to VCC = 1V |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors secondary supply via external resistor divider; threshold set to 1.23V ±0.03V |
| 4 - MR | Manual-reset input | Pull low to force reset; internal 63.5kΩ pull-up allows NC or VCC tie; 1.5µs min pulse width |
| 5 - VCC | Main supply input | Power source and primary monitored rail; internal divider derives 2.5V reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 2.5V threshold | Eliminates external resistor network; reduces BOM count and layout area vs. adjustable supervisors |
| 140ms minimum reset timeout | Guarantees sufficient hold time for slow-starting µPs and peripherals without timing component variance |
| Immunity to fast VCC transients | Rejects sub-200ns glitches up to 100mV amplitude - prevents spurious resets in noisy power environments |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state during deep brownout or battery depletion down to critical voltage |
| No external components required | Reduces design risk and board space; simplifies qualification for industrial and medical applications |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Power sequencing and brownout protection in clamshell notebooks with dual 3.3V/5V rails. IC Role / Device Role / Timing Role: Primary VCC supervisor asserting active-low RESET to x86 or ARM host processor during 3.3V rail collapse. Use Value: Prevents code corruption by holding processor in reset until both supplies stabilize post-brownout, leveraging 140ms timeout and 2.5V threshold matched to 3.3V LDO dropout. | Use Scenario: Reliable startup and fault recovery in PLC I/O modules powered from 24V DC converted to 5V/3.3V. IC Role / Device Role / Timing Role: System-level reset generator triggered by main 5V supply sag or manual service button press. Use Value: Enables field-service reset via MR pin without firmware intervention; push/pull output drives optocoupler input directly, isolating control logic. |
| Intelligent Instruments | Multivoltage Systems |
Use Scenario: Power monitoring in handheld DMMs with Li-ion battery (3.0–4.2V) and regulated 3.3V analog/digital rails. IC Role / Device Role / Timing Role: Undervoltage detector for battery-backed subsystems, using RST IN to monitor backup rail while VCC tracks main 3.3V. Use Value: Dual-monitoring capability ensures measurement integrity during battery swap or low-voltage warning, with 8µA quiescent current extending runtime. | Use Scenario: Coordinated reset across 3.3V FPGA core and 5V I/O banks in industrial gateways. IC Role / Device Role / Timing Role: Single-point reset arbitration where VCC = 3.3V and RST IN monitors 5V rail via resistor divider. Use Value: Eliminates need for two discrete supervisors; factory 2.5V threshold aligns with 3.3V supply tolerance (±5%), ensuring robust margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK25D2+T | 20ms (min) reset timeout vs. 140ms - faster release but less margin for slow peripherals | Suitable for µPs with minimal initialization time; not recommended for systems with EEPROM write cycles or PLL lock requirements | Select only if timing budget permits shorter hold time and transient immunity remains acceptable |
| TPS3808G25DBVR | 2.5V threshold with 200ms (typ) timeout; 1.8µA ICC; open-drain output requiring pull-up | Lower power but requires external resistor; lacks manual-reset input and secondary RST IN pin | Prefer for ultra-low-power battery devices where MR and dual-input capability are unnecessary |
Compared with MAX6306UK25D2+T and TPS3808G25DBVR, the MAX6306UK25D3+T uniquely combines factory-set 2.5V detection, 140ms timeout, integrated MR, and RST IN in a single SOT23-5 - making it optimal for space-constrained, dual-supply systems needing deterministic reset behavior and field-serviceability.
Availability
MAX6306UK25D3+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6306UK25D3+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, sensing, and interface applications in industrial, computing, and communications markets.
The MAX6305–MAX6313 product line delivers highly integrated, low-power microprocessor supervisory circuits targeting multivoltage systems where reliability, small size, and deterministic reset timing are critical.
FAQ
What is the factory-set reset threshold voltage for MAX6306UK25D3+T?
The MAX6306UK25D3+T has a factory-set VCC reset threshold of 2.5V, specified with ±2.5% tolerance over the full operating temperature range of -40°C to +85°C. This value is trimmed using an internal resistor divider and is documented in the Electrical Characteristics table under "Reset Threshold (VTH)" for MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 variants. The "25" in the part number explicitly denotes the 2.5V nominal threshold.
Does MAX6306UK25D3+T support manual reset functionality?
Yes, MAX6306UK25D3+T includes a dedicated MR (manual-reset) input on pin 4. Pulling MR low forces an immediate active-low RESET assertion, which remains active for the full 140ms (min) timeout period after MR returns high. The pin features an internal 63.5kΩ pull-up resistor, allowing it to be left unconnected or tied to VCC when unused. MR logic thresholds scale with VCC (VIH = 0.7×VCC, VIL = 0.3×VCC), supporting interoperability with both 3.3V and 5V logic families.
What is the reset timeout period for MAX6306UK25D3+T, and is it adjustable?
The MAX6306UK25D3+T has a factory-programmed reset timeout period of 140ms (minimum), indicated by the "D3" suffix in the part number. This timeout is generated by an internal RC timer and is not adjustable via external components. It ensures the RESET signal remains asserted long enough for microprocessors and peripherals to complete power-up initialization, eliminating the need for timing capacitors and associated layout sensitivity.
Can MAX6306UK25D3+T monitor a second voltage rail besides VCC?
Yes, MAX6306UK25D3+T includes a dedicated RST IN input (pin 3) that functions as an adjustable undervoltage reset comparator. When used with an external resistor divider, it monitors a secondary supply (e.g., 5V or 12V rail) against the internal 1.23V reference. This enables dual-rail supervision - for example, asserting RESET if either the primary 3.3V VCC drops below 2.5V or the auxiliary 5V rail falls below a user-defined threshold - without requiring a second supervisor IC.
What package type and environmental compliance does MAX6306UK25D3+T use?
MAX6306UK25D3+T is supplied in a RoHS-compliant, lead-free 5-pin SOT23 package (package code U5+1, outline 21-0057). The "+T" suffix explicitly denotes lead-free termination. It is qualified for operation from 0°C to +70°C and is shipped in tape-and-reel format only, supporting automated SMT assembly. The compact 2.9mm × 1.6mm footprint makes it suitable for dense portable and industrial PCB layouts.
MAX6306UK25D3+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:
- 2.5V, 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
MAX6306UK25D3+T FAQ
1.How can I place an order for MAX6306UK25D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK25D3+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 MAX6306UK25D3+T reliable?
The price and inventory of MAX6306UK25D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK25D3+T is usually 5 days.
3.What payment methods are accepted for MAX6306UK25D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK25D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK25D3+T?
MAX6306UK25D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK25D3+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 MAX6306UK25D3+T?
For technical support, including MAX6306UK25D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK25D3+T requirements.
6.How does Aetrix verify that MAX6306UK25D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6306UK25D3+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 MAX6306UK25D3+T meets industry standards.
7.What is the process for return or replacement of MAX6306UK25D3+T?
All MAX6306UK25D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK25D3+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 MAX6306UK25D3+T part is unused and in its original packaging.
Return procedure for MAX6306UK25D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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