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Analog Devices Inc./Maxim Integrated MAX6306UK30D2+
- Part No.:
- MAX6306UK30D2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6306UK30D2+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:541
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Product details
Overview
The MAX6306UK30D2+ 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 3.0V ±2.5% reset threshold, 20ms minimum reset timeout period, manual reset input (MR), and guaranteed RESET assertion down to VCC = 1V - ideal for dual-voltage (3.3V/5V) embedded control systems requiring robust brownout protection.
For engineers reviewing the MAX6306UK30D2+ datasheet, MAX6306UK30D2+ pinout, MAX6306UK30D2+ application, or MAX6306UK30D2+ equivalent, key selection considerations include its 3.0V VCC monitor threshold, 20ms timeout, MR input compatibility with TTL/CMOS logic, immunity to fast VCC transients (<100ns), and operation across 0°C to +70°C industrial temperature range.
Technical Context
The MAX6306UK30D2+ uses an internal factory-trimmed resistor divider to monitor VCC against a precise 3.0V threshold, with ±2.5% tolerance over –40°C to +85°C. Its reset generator includes a programmable timeout timer (D2 = 20ms min) and guarantees valid reset assertion even as VCC drops to 1V.
This device integrates a manual-reset input (MR) with internal 63.5kΩ pull-up, supports undervoltage monitoring only on VCC (no external RST_IN/OVRST_IN pins), and delivers push/pull active-low RESET output capable of sinking 3.2mA at VCC > 4.25V - eliminating need for external pull-up resistors in most µP interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.0V ±2.5% (factory-trimmed; enables precise 3.3V supply supervision) |
| Reset Timeout Period | 20ms minimum (D2 variant; ensures sufficient µP initialization time after power stabilization) |
| Supply Current | 8µA typical at +25°C (ultra-low quiescent current for battery-powered portable equipment) |
| Operating Voltage Range | VCC = (3.0V × 1.025) to +5.5V = 3.075V–5.5V (ensures reliable monitoring only above threshold margin) |
| RESET Output Type | Push/pull active-low (drives µP reset pin directly without external pull-up; sinks 3.2mA @ VCC > 4.25V) |
| Manual Reset Input | MR with 63.5kΩ internal pull-up; accepts TTL/CMOS logic levels; 1.5µs minimum pulse width |
| Temperature Range | 0°C to +70°C (industrial-grade operation; validated across full range) |
Pinout & Package
Package: 5-pin SOT23 (U5+1), RoHS-compliant lead-free, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microprocessor reset pin directly; sinks 3.2mA @ VCC > 4.25V; no external pull-up required |
| 2 - GND | System ground reference | Common return path for all internal comparators and reset generator; must be low-impedance |
| 3 - MR | Manual reset input | Pull low to force system reset; internal 63.5kΩ pull-up allows direct switch-to-GND connection |
| 4 - NC | No connect | Internally unused pin; must remain unconnected per datasheet (not tied to GND/VCC) |
| 5 - VCC | Supply voltage input & monitored rail | Power source and primary monitored voltage; device operates only when VCC ≥ 3.075V |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-set 3.0V reset threshold | ±2.5% tolerance over –40°C to +85°C enables accurate 3.3V supply supervision without calibration |
| 20ms minimum reset timeout (D2) | Guarantees µP reset remains asserted long enough for stable clock and memory initialization |
| Push/pull active-low RESET output | Eliminates external pull-up resistor; simplifies PCB layout and improves noise immunity vs. open-drain |
| Manual reset input with internal pull-up | 63.5kΩ internal pull-up allows momentary switch interface without external components or debounce |
| Immunity to fast VCC transients | Rejects <100ns negative-going glitches - prevents spurious resets during switching noise or ESD events |
Applications
| Portable/Battery-Powered Equipment | Embedded Control Systems |
|---|---|
Use Scenario: Power management in handheld medical devices with Li-ion battery and 3.3V/5V DC-DC rails. IC Role / Device Role / Timing Role: Monitors 3.3V main supply and asserts reset if voltage sags below 3.0V during battery discharge or load transients. Use Value: Prevents firmware corruption by ensuring µP remains held in reset until regulated 3.3V rail stabilizes post-power-up or brownout recovery. |
Use Scenario: Industrial PLC I/O module with dual 5V logic and 3.3V microcontroller supply. IC Role / Device Role / Timing Role: Supervises 3.3V VCC rail and provides synchronized reset to ARM Cortex-M4 core via push/pull output. Use Value: Guarantees deterministic boot sequence by holding reset for ≥20ms while FPGA configuration completes and clocks stabilize. |
| Computers | Multivoltage Systems: 3V/5V |
Use Scenario: Compact fanless PC motherboard with legacy 5V and modern 3.3V peripherals. IC Role / Device Role / Timing Role: Primary VCC supervisor for 3.3V core logic; MR pin connected to front-panel reset button. Use Value: Enables hardware-initiated cold reset without BIOS intervention; push/pull output drives reset net with minimal trace inductance. |
Use Scenario: Automotive infotainment head unit with separate 5V analog and 3.3V digital domains. IC Role / Device Role / Timing Role: Monitors 3.3V digital supply feeding SoC; D2 timeout aligns with DDR3 initialization timing requirements. Use Value: Ensures SoC reset deassertion occurs only after 3.3V rail settles within ±2.5% of 3.0V threshold, preventing marginal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK30D3+ | Same 3.0V threshold and package, but 140ms minimum reset timeout (D3) | Suitable for systems requiring longer reset hold time (e.g., FPGA configuration, EEPROM write cycles) | Select D3 only if 20ms timeout is insufficient; D2 provides optimal balance for standard µP boot sequences. |
| TLV803EB30DBZR | 3.0V threshold, SOT23-5, open-drain output, 200ms timeout, 1.8–6V VCC range | Lacks manual reset input; requires external pull-up; wider VCC range but looser threshold accuracy (±2.9%) | Choose TLV803EB30DBZR only if extended VCC range or cost sensitivity outweighs need for MR and tighter threshold tolerance. |
Compared with MAX6306UK30D2+, the D3 variant extends reset hold time for complex initialization, while TLV803EB30DBZR trades manual reset capability and precision for broader supply flexibility and lower cost - making MAX6306UK30D2+ optimal for 3.3V systems needing MR and tight threshold control.
Availability
MAX6306UK30D2+ is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and multivoltage (3V/5V) industrial electronics requiring stable component supply and long-term production continuity.
Supply support for MAX6306UK30D2+ 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 semiconductor solutions for industrial, computing, and communications markets.
The MAX6305–MAX6313 family delivers programmable, multi-input supervisory circuits optimized for reliable power-on reset, brownout detection, and manual reset in space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for MAX6306UK30D2+?
The MAX6306UK30D2+ has a factory-programmed VCC reset threshold of 3.0V with ±2.5% tolerance over the full operating temperature range (0°C to +70°C). This value is trimmed during manufacturing using an internal resistor divider and is specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for the MAX6306 series. The "30" in the part number explicitly denotes the 3.0V nominal threshold.
Does MAX6306UK30D2+ support manual reset functionality?
Yes, the MAX6306UK30D2+ includes a dedicated MR (manual reset) input on Pin 3. It features an internal 63.5kΩ pull-up resistor, allowing direct connection to a normally-open momentary switch tied to GND. A logic-low pulse ≥1.5µs on MR forces RESET assertion for the full timeout period (20ms min), enabling hardware-initiated system resets without external components.
What is the function of Pin 4 on MAX6306UK30D2+?
Pin 4 on the MAX6306UK30D2+ is a no-connect (NC) terminal. It is internally unconnected and must remain floating - not tied to GND, VCC, or any other signal. This pin exists due to the shared SOT23-5 package footprint across the MAX6305–MAX6313 family but serves no electrical function in the MAX6306 variant, as confirmed in the Pin Description section and Pin Configurations diagram.
Can MAX6306UK30D2+ monitor voltages other than VCC?
No, the MAX6306UK30D2+ monitors only the VCC supply voltage via its internal factory-trimmed resistor divider. Unlike variants such as MAX6307 or MAX6313, it does not include external RST_IN or OVRST_IN pins. Its pinout (RESET, GND, MR, NC, VCC) confirms sole reliance on VCC for reset triggering - making it a single-rail supervisor optimized for 3.3V system supply monitoring.
What is the minimum VCC voltage required for MAX6306UK30D2+ to operate correctly?
The MAX6306UK30D2+ requires VCC ≥ 3.075V to operate correctly, calculated as VTH × 1.025 = 3.0V × 1.025. This is specified in the Absolute Maximum Ratings and Electrical Characteristics sections: "VCC = (VTH + 2.5%) to +5.5V". Below this voltage, the internal comparator cannot reliably monitor the 3.0V threshold, and RESET behavior is undefined - ensuring fail-safe operation during deep brownout conditions.
MAX6306UK30D2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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+ FAQ
1.How can I place an order for MAX6306UK30D2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6306UK30D2+ 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+ reliable?
The price and inventory of MAX6306UK30D2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6306UK30D2+ is usually 5 days.
3.What payment methods are accepted for MAX6306UK30D2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6306UK30D2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6306UK30D2+?
MAX6306UK30D2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6306UK30D2+ 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+?
For technical support, including MAX6306UK30D2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6306UK30D2+ requirements.
6.How does Aetrix verify that MAX6306UK30D2+ is sourced from the original manufacturer or authorized distributors?
All MAX6306UK30D2+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6306UK30D2+?
All MAX6306UK30D2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6306UK30D2+, 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+ part is unused and in its original packaging.
Return procedure for MAX6306UK30D2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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