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Analog Devices Inc./Maxim Integrated MAX6306UK31D1+T
- Part No.:
- MAX6306UK31D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK31D1+T.pdf
- Description:
- POWER SUPPLY SUPPORT CIRCUIT, FI
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6306UK31D1+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC for undervoltage conditions and provides a push/pull active-low reset output. It features a factory-set 3.1V ±2.5% reset threshold (TA = –40°C to +85°C), 1ms minimum reset timeout, manual reset input (MR), and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6306UK31D1+T datasheet, MAX6306UK31D1+T pinout, MAX6306UK31D1+T application, or MAX6306UK31D1+T equivalent, this page delivers verified specifications, thermal-stable reset behavior, MR-driven system recovery, transient-immune VCC monitoring, and direct integration guidance for 3.3V/5V microprocessor platforms.
Technical Context
The MAX6306UK31D1+T uses an internal factory-trimmed voltage divider to monitor VCC against its 3.1V threshold, with ±2.5% tolerance over –40°C to +85°C and 40ppm/°C drift. Its reset generator asserts active-low RESET for ≥1ms after VCC rises above threshold or after MR release.
It integrates a manual-reset input with 63.5kΩ internal pull-up, TTL/CMOS-compatible logic thresholds, and 1.5µs minimum pulse width support. The device ignores fast VCC transients - up to ~10µs at 100mV overdrive - and maintains valid reset assertion even during supply collapse to 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.1V ±2.5% (–40°C to +85°C); ensures deterministic reset activation across industrial temperature range |
| Reset Timeout Period | 1ms minimum; guarantees µP initialization window sufficient for stable clock and memory settling |
| Supply Current | 8µA typical at +25°C; enables battery-backed operation in portable equipment |
| RESET Output Type | Push/pull active-low; drives CMOS/TTL loads directly without external pull-up |
| Operating Voltage Range | VCC = (3.1V × 1.025) to +5.5V ≈ 3.18V to 5.5V; prevents false reset during VCC ramp-up |
| MR Input Threshold | VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC; supports 3V and 5V logic families without level-shifting |
| Reset Propagation Delay | <500ns MR-to-RESET delay; enables sub-microsecond system recovery initiation |
Pinout & Package
SOT23-5 package (5-pin, 1.6mm × 2.9mm × 1.1mm body, 0.95mm pitch), lead-free, RoHS-compliant.
| 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; remains 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 referenced to 1.23V internal bandgap |
| 4 - MR | Manual reset input | Pull-low initiates reset; internal 63.5kΩ pull-up allows NC or VCC tie; immune to <0.1µs glitches |
| 5 - VCC | Main supply input and monitored rail | Power source and primary reset trigger; internally divided to set 3.1V threshold; min operating VCC = 3.18V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 3.1V reset threshold | Eliminates external resistor network; reduces BOM count and layout sensitivity |
| 1ms factory-set reset timeout | Guarantees sufficient hold time for flash memory initialization and PLL lock in 3.3V µPs |
| Manual reset input with internal pull-up | Enables hardware-initiated recovery without external components or debounce circuitry |
| Immunity to short VCC transients | Rejects <10µs negative spikes at 100mV overdrive - critical for noisy DC/DC converter outputs |
| Valid RESET down to VCC = 1V | Ensures controlled shutdown sequencing in battery-depleted or brownout scenarios |
Applications
| Industrial PLC Controller | Medical Handheld Monitor |
|---|---|
|
Use Scenario: Power cycling during field firmware updates and sensor calibration sequences. IC Role / Device Role / Timing Role: Primary VCC supervisor asserting active-low RESET to ARM Cortex-M4 during 3.3V rail instability. Use Value: Prevents corrupted register writes by enforcing 1ms minimum reset hold time after VCC recovery. |
Use Scenario: Battery voltage sag during ECG signal acquisition under high-current LED backlighting. IC Role / Device Role / Timing Role: Dual-rail monitor detecting 3.1V dropout on 3.3V analog supply while ignoring 500ns switching noise. Use Value: Maintains clinical data integrity by suppressing false resets during transient load-induced dips. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
|
Use Scenario: Cold-cranking events causing 12V system drop affecting 5V/3.3V DC/DC outputs. IC Role / Device Role / Timing Role: VCC supervisor with MR input tied to vehicle ignition switch for hard reset on key-off/key-on transition. Use Value: Enables deterministic boot state after engine restart without relying on µP's internal POR. |
Use Scenario: Tamper detection triggering immediate secure shutdown during AC mains interruption. IC Role / Device Role / Timing Role: Backup-supply watchdog using RST IN to monitor supercapacitor voltage decay below 2.7V. Use Value: Guarantees cryptographic key erasure before backup power falls below secure operating threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK31D2+T | 20ms minimum reset timeout vs. 1ms | Better suited for systems with slow-clock µPs or high-capacitance power rails requiring longer stabilization | Select when extended reset hold time improves reliability over marginal power-up timing margins |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 2.5µA quiescent current, no MR input | Lacks manual reset and adjustable inputs; optimized for ultra-low-power always-on monitoring | Choose for battery-powered IoT nodes where MR functionality is unnecessary and current budget is <3µA |
Compared with MAX6306UK31D2+T and TPS3808G33DBVR, the MAX6306UK31D1+T uniquely balances minimal reset duration (1ms), integrated MR capability, and industrial-temperature-grade 3.1V accuracy - making it optimal for responsive, field-serviceable embedded controllers.
Availability
MAX6306UK31D1+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld monitors, automotive infotainment head units, smart energy meters, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6306UK31D1+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 demanding industrial, medical, and automotive applications.
The MAX6305–MAX6313 family delivers programmable, multirail supervisory functions targeting space-constrained, multivoltage embedded systems needing robust power-up sequencing and fault recovery.
FAQ
What is the exact factory-set reset threshold voltage for MAX6306UK31D1+T?
The MAX6306UK31D1+T has a factory-trimmed nominal reset threshold of 3.1V, specified with ±2.5% tolerance over the full industrial temperature range (–40°C to +85°C). This value is achieved via internal laser-trimmed resistors and is confirmed in the Electrical Characteristics table of the official MAX6305–MAX6313 datasheet (Rev 6, 7/12).
Does MAX6306UK31D1+T support manual reset functionality, and how is it implemented?
Yes, MAX6306UK31D1+T includes a dedicated MR (manual reset) input on pin 4. Pulling MR low forces an immediate active-low RESET assertion, which persists for the full 1ms timeout after MR returns high. An internal 63.5kΩ pull-up resistor allows MR to be left unconnected or tied to VCC when unused, eliminating external components.
Can MAX6306UK31D1+T monitor a second voltage rail besides VCC?
Yes, MAX6306UK31D1+T includes pin 3 (RST IN) as an adjustable undervoltage reset input. By connecting an external resistor divider between a secondary supply and GND, users can program a custom reset threshold referenced to the internal 1.23V bandgap - enabling dual-rail supervision alongside the factory-set 3.1V VCC monitor.
What is the minimum VCC voltage required for MAX6306UK31D1+T to operate correctly?
MAX6306UK31D1+T requires VCC ≥ (3.1V × 1.025) ≈ 3.18V to guarantee proper reset comparator operation, per the datasheet's "VCC = (VTH + 2.5%) to +5.5V" specification. Below this, the internal voltage divider may not bias correctly, risking undetected undervoltage conditions.
Is MAX6306UK31D1+T compatible with 3.3V and 5V microprocessor reset inputs?
Yes, MAX6306UK31D1+T's push/pull active-low RESET output (pin 1) is fully compatible with both 3.3V and 5V µP reset inputs. It sources ≥0.8×VCC and sinks ≥3.2mA (at VCC > 4.25V), meeting standard TTL and CMOS input requirements without external level-shifting or pull-up resistors.
MAX6306UK31D1+T 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.08V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6306UK31D1+T FAQ
1.How can I place an order for MAX6306UK31D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK31D1+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 MAX6306UK31D1+T reliable?
The price and inventory of MAX6306UK31D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK31D1+T is usually 5 days.
3.What payment methods are accepted for MAX6306UK31D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK31D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK31D1+T?
MAX6306UK31D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK31D1+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 MAX6306UK31D1+T?
For technical support, including MAX6306UK31D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK31D1+T requirements.
6.How does Aetrix verify that MAX6306UK31D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6306UK31D1+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 MAX6306UK31D1+T meets industry standards.
7.What is the process for return or replacement of MAX6306UK31D1+T?
All MAX6306UK31D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK31D1+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 MAX6306UK31D1+T part is unused and in its original packaging.
Return procedure for MAX6306UK31D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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