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Analog Devices Inc./Maxim Integrated MAX6865UK30D2L+T
- Part No.:
- MAX6865UK30D2L+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6865UK30D2L+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,421
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Product details
Overview
The MAX6865UK30D2L+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 3.000V reset threshold (±2.5%), 40ms minimum reset timeout, manual reset input (MR), and watchdog timer with 209s typical timeout. It monitors VCC in battery-powered medical and portable electronics to ensure reliable µP initialization during brownout or software hang.
For engineers reviewing the MAX6865UK30D2L+T datasheet, MAX6865UK30D2L+T pinout, MAX6865UK30D2L+T application, or MAX6865UK30D2L+T equivalent, key selection criteria include its guaranteed reset validity down to VCC = +1.1V, immunity to short VCC transients (<40µs at 100mV overdrive), push-pull active-high RESET output, and compatibility with noisy low-power systems requiring minimal quiescent current.
Technical Context
This device integrates voltage monitoring, watchdog timer, and manual reset functions in a single BiCMOS IC. Its watchdog circuit clears on any WDI edge (rising or falling) and triggers reset if WDI remains static beyond 209s (typ), while the reset generator asserts RESET high for ≥40ms after VCC rises above 3.000V or MR deasserts.
The internal 10kΩ MR pullup ensures robust manual reset operation without external components, and the push-pull active-high RESET output drives directly into µP reset inputs referenced to VCC - eliminating need for external pullups or level-shifting circuitry in standard 3.3V/5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typ at VCC = 1.8V - enables multi-year battery life in glucose monitors and pagers |
| Reset Threshold | 3.000V ±2.5% - factory-trimmed for precise brownout detection at common 3.0V rail |
| Reset Timeout | 40ms min (D2 option) - ensures µP completes power-up sequencing before release |
| Watchdog Timeout | 209s typ (L suffix) - supports long-loop firmware without excessive watchdog toggling |
| VCC Validity Range | Operates down to VCC = +1.1V - guarantees valid RESET assertion during deep brownout |
| MR Input Logic | Active-low with 10kΩ internal pullup - simplifies momentary switch interface; no external resistor needed |
| WDI Pulse Width | 150ns min - tolerates fast microcontroller I/O transitions without false watchdog clears |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Push-pull active-high reset output - drives µP reset pin directly; sinks 500µA at VCC ≥ 2.38V |
| 2 | GND | Ground reference - must connect to system ground plane for noise immunity and reset timing accuracy |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC; 1µs minimum pulse width required |
| 4 | WDI | Watchdog input - edge-sensitive; clears internal timer on rising/falling transition; 20nA max leakage |
| 5 | VCC | Supply voltage input - monitors 3.0V rail; requires 0.1µF bypass capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables >10-year battery life in portable medical devices |
| Guaranteed reset at low VCC | Valid RESET assertion down to VCC = +1.1V prevents undefined µP state during deep brownout |
| No external components | Integrated 10kΩ MR pullup and no timing capacitors reduce BOM count and PCB area |
| Watchdog glitch immunity | 150ns minimum WDI pulse width rejects EMI-induced false edges in noisy environments |
| VCC transient immunity | Immune to ≤40µs VCC glitches at 100mV overdrive - avoids spurious resets in switching power supply systems |
Applications
| Glucose Monitors | Patient Monitors |
|---|---|
Use Scenario: Continuous blood glucose sensing with Bluetooth LE transmission and low-power sleep cycles. IC Role / Device Role / Timing Role: Supervises 3.0V main rail and triggers hardware reset if µP hangs during sensor calibration or radio transmission. Use Value: 170nA ICC extends disposable sensor cartridge life beyond 14 days; 209s watchdog timeout accommodates long firmware self-tests without false triggers. |
Use Scenario: Multi-parameter bedside monitor with ECG, SpO₂, and NIBP modules sharing a single ARM Cortex-M4. IC Role / Device Role / Timing Role: Provides synchronized power-on reset and detects µP lockup during real-time waveform processing. Use Value: Guaranteed RESET validity to VCC = +1.1V ensures safe shutdown during AC power loss; D2 40ms timeout matches µP boot ROM execution time. |
| MP3 Players | Cell Phones (Feature) |
Use Scenario: Flash-based audio player with Li-ion battery, USB charging, and OLED display. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output powering codec and flash memory controller. Use Value: Push-pull active-high RESET eliminates external pullup, reducing component count; MR allows user-initiated soft reset via side button. |
Use Scenario: Dual-SIM GSM feature phone with 3G modem, keypad, and backlight control. IC Role / Device Role / Timing Role: Resets baseband processor during SIM hot-swap or firmware update failure. Use Value: 3.000V threshold aligns with 3.0V PMIC rail; 209s watchdog timeout covers full modem handshake sequence without premature reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6864UK30D2L+T | Same 3.000V threshold, 40ms timeout, and 209s watchdog, but features active-low push-pull RESET output | Requires inverted reset logic on µP side; unsuitable for µPs with active-high reset pins | Select MAX6864UK30D2L+T only when target µP accepts active-low reset assertion |
| TPS3837K33DBVR | 3.3V reset threshold, 200ms timeout, no watchdog timer, 1.6µA ICC - higher current, fixed timeout, no WDI | Lacks watchdog functionality; insufficient for systems requiring software hang detection | Choose TPS3837K33DBVR only for simple power-monitoring applications without code-execution safety requirements |
Compared with MAX6865UK30D2L+T, MAX6864UK30D2L+T offers identical supervision parameters but inverted RESET polarity, while TPS3837K33DBVR trades ultra-low current and watchdog capability for lower cost and simpler implementation in non-critical applications.
Availability
MAX6865UK30D2L+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitors, MP3 players, and feature cell phones requiring stable component supply across extended production lifecycles.
Supply support for MAX6865UK30D2L+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 connectivity in resource-constrained systems.
The MAX6854–MAX6869 family delivers nanopower supervisory circuits optimized for battery-operated medical, portable, and industrial equipment where ultra-low ICC and reliable reset timing are critical.
FAQ
What is the exact reset threshold voltage of the MAX6865UK30D2L+T?
The MAX6865UK30D2L+T has a factory-trimmed reset threshold of 3.000V with ±2.5% tolerance over -40°C to +85°C. This value is confirmed in Table 2 (Threshold Suffix Guide) where suffix "30" corresponds to 3.000V nominal, and Electrical Characteristics specify VTH = VCC falling at 3.000V ±2.5%. The MAX6865UK30D2L+T maintains this accuracy without external calibration.
Does the MAX6865UK30D2L+T require external components for basic operation?
No, the MAX6865UK30D2L+T operates autonomously with no external components required. Its MR input includes a 10kΩ internal pullup, the RESET output is push-pull active-high (no pullup resistor needed), and only a 0.1µF VCC bypass capacitor is recommended for noise immunity - not mandatory for functionality. This eliminates BOM additions for core supervision in space-constrained designs.
What is the watchdog timeout behavior of the MAX6865UK30D2L+T?
The MAX6865UK30D2L+T implements a watchdog timer with 209s typical timeout (L suffix), clearing on any WDI edge and asserting RESET high if WDI remains static beyond that period. The timer pauses while RESET is asserted and resumes counting upon deassertion. This behavior is verified in Table 3 (Watchdog Timeout) and Figure 3 timing diagram, ensuring reliable detection of µP firmware hangs.
Can the MAX6865UK30D2L+T operate reliably at very low supply voltages?
Yes, the MAX6865UK30D2L+T guarantees valid RESET assertion down to VCC = +1.1V, as specified in Absolute Maximum Ratings and Electrical Characteristics. This ensures deterministic µP reset even during severe brownout conditions where other supervisors may fail, making it suitable for Li-ion battery systems discharging to 2.5V or lower under load.
How does the MAX6865UK30D2L+T handle short VCC transients?
The MAX6865UK30D2L+T is immune to VCC transients ≤40µs in duration when overdriven by 100mV, as shown in Figure MAX684 toc05. This transient immunity prevents spurious resets caused by switching regulator noise or ESD events, enabling robust operation in electrically noisy portable equipment without additional filtering components.
MAX6865UK30D2L+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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 40ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6865UK30D2L+T FAQ
1.How can I place an order for MAX6865UK30D2L+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6865UK30D2L+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 MAX6865UK30D2L+T reliable?
The price and inventory of MAX6865UK30D2L+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6865UK30D2L+T is usually 5 days.
3.What payment methods are accepted for MAX6865UK30D2L+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6865UK30D2L+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6865UK30D2L+T?
MAX6865UK30D2L+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6865UK30D2L+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 MAX6865UK30D2L+T?
For technical support, including MAX6865UK30D2L+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6865UK30D2L+T requirements.
6.How does Aetrix verify that MAX6865UK30D2L+T is sourced from the original manufacturer or authorized distributors?
All MAX6865UK30D2L+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 MAX6865UK30D2L+T meets industry standards.
7.What is the process for return or replacement of MAX6865UK30D2L+T?
All MAX6865UK30D2L+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6865UK30D2L+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 MAX6865UK30D2L+T part is unused and in its original packaging.
Return procedure for MAX6865UK30D2L+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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