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Analog Devices Inc./Maxim Integrated MAX6865UK30D6L+T
- Part No.:
- MAX6865UK30D6L+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6865UK30D6L+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,069
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Product details
Overview
The MAX6865UK30D6L+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 3.000V reset threshold (±2.5%), 1200ms minimum reset timeout, manual reset input (MR), and watchdog timer with 209s typical timeout. It asserts active-low push-pull RESET during VCC brownout, MR assertion, or watchdog expiration - used in battery-powered medical monitors and portable instrumentation.
For engineers reviewing the MAX6865UK30D6L+T datasheet, MAX6865UK30D6L+T pinout, MAX6865UK30D6L+T application, or MAX6865UK30D6L+T equivalent, key selection criteria include guaranteed RESET validity down to VCC = +1.1V, immunity to sub-40µs VCC transients, watchdog pulse detection as short as 150ns, and compatibility with CMOS-level MR/WDI inputs.
Technical Context
This device integrates voltage monitoring, a precision reset generator with hysteresis (0.5% of VTH), and a watchdog timer that clears on any WDI edge or MR assertion. Its internal 10kΩ MR pullup and glitch rejection (200ns) enable direct switch interfacing without external components.
The reset timeout is fixed at 1200ms (D6 option), and the watchdog timeout is factory-set to L-suffix (209s typ). The push-pull active-high RESET output is referenced to VCC and delivers VOH ≥ 0.8×VCC at ISOURCE = 500µA (VCC ≥ 2.38V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typ at VCC = 1.8V; enables >10-year battery life in coin-cell–powered devices |
| Reset Threshold | 3.000V ±2.5% (suffix "30"); stable over -40°C to +85°C with <0.5% normalized drift |
| Reset Timeout | 600–1200ms (D6 option); ensures reliable µP initialization after power recovery |
| Watchdog Timeout | 95–487s (L-suffix); supports long-cycle firmware execution in low-power sensor nodes |
| VCC Operating Range | 1.2V to 5.5V; valid RESET asserted down to VCC = +1.1V for brownout safety |
| WDI Pulse Width | ≥150ns (guaranteed); detects fast software toggles without missing watchdog clears |
| MR Glitch Rejection | 200ns; rejects EMI-induced noise on manual reset lines without external filtering |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, surface-mount, footprint compatible with industry-standard 5-pin supervisory ICs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output; drives high when VCC < VTH, MR low, or WDI timeout - no external pullup required |
| 2 | GND | Ground reference for all internal circuits; must be connected to system ground plane |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 10kΩ; accepts CMOS logic levels |
| 4 | WDI | Watchdog input; edge-sensitive (rising/falling); resets internal timer on each transition; immune to <150ns pulses |
| 5 | VCC | Supply voltage input and monitored rail; requires 0.1µF bypass capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables multi-year operation from CR2032 batteries |
| Guaranteed RESET validity | RESET remains functional down to VCC = +1.1V - critical for safe brownout recovery |
| No external components | Integrated MR pullup, precise voltage reference, and hysteresis eliminate discrete BOM items |
| Transient immunity | Immune to VCC glitches ≤40µs at 100mV overdrive - reduces false resets in noisy environments |
| Watchdog edge sensitivity | Detects 150ns WDI pulses - supports high-frequency firmware watchdog toggling |
Applications
| Glucose Monitor Power Management | Patient Vital Sign Logger |
|---|---|
Use Scenario: Continuous glucose sensing with intermittent wireless transmission and sleep-mode cycling. IC Role / Device Role / Timing Role: Supervises 3.0V LiMnO₂ battery rail and triggers full µP reset if voltage sags below 3.0V or firmware hangs. Use Value: 1200ms D6 timeout ensures complete ADC calibration and BLE reinitialization before resuming sampling. |
Use Scenario: Portable ECG/SpO₂ logger operating on AA alkaline cells with duty-cycled measurement bursts. IC Role / Device Role / Timing Role: Monitors main 3.0V supply and provides watchdog supervision of ARM Cortex-M0 firmware loop timing. Use Value: L-suffix 209s watchdog timeout accommodates extended deep-sleep intervals while preventing undetected lockups. |
| Handheld Diagnostic Scanner | Industrial Wireless Sensor Node |
Use Scenario: Battery-powered barcode/RFID scanner with rapid on/off cycles and USB charging. IC Role / Device Role / Timing Role: Generates clean power-on reset and detects VCC droop during high-current motor activation. Use Value: 170nA ICC extends standby time between charges; MR pin allows hardware-initiated diagnostics reset. |
Use Scenario: LoRaWAN node powered by solar-charged LiFePO₄, transmitting hourly sensor data. IC Role / Device Role / Timing Role: Ensures µP reset on cold-start and validates firmware execution via WDI toggling synchronized to radio TX cycle. Use Value: Push-pull RESET output drives 3.3V µP reset pin directly; no level-shifting or pullup needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6864UK30D6L+T | No RESET output - open-drain active-low only; same VTH, timeout, and watchdog specs | Requires external pullup resistor; unsuitable where active-high drive or low-impedance reset is needed | Select MAX6865UK30D6L+T when push-pull active-high RESET is required for direct µP interface |
| TPS3838K33DBVR | Fixed 3.08V threshold (±0.5%), 200ms timeout, no watchdog; 1.5µA ICC; SOT23-5 | Lacks watchdog and manual reset; higher supply current limits ultra-low-power use cases | Choose MAX6865UK30D6L+T for nanopower operation, watchdog supervision, and flexible reset configuration |
Compared with MAX6864UK30D6L+T and TPS3838K33DBVR, the MAX6865UK30D6L+T uniquely combines ultra-low ICC, factory-trimmed 3.000V threshold, 1200ms reset timeout, and active-high push-pull RESET - enabling simplified, robust reset architecture in space-constrained medical and industrial battery systems.
Availability
MAX6865UK30D6L+T is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign loggers, handheld diagnostic scanners, and industrial wireless sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for MAX6865UK30D6L+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, medical, and communications markets.
The MAX68xx family delivers nanopower supervisory solutions optimized for battery longevity and reliability in portable medical and instrumentation systems - emphasizing ultra-low ICC, wide VCC range, and integrated watchdog functionality.
FAQ
What is the exact reset threshold voltage of the MAX6865UK30D6L+T?
The MAX6865UK30D6L+T has a factory-trimmed reset threshold of 3.000V with ±2.5% tolerance over -40°C to +85°C, as defined by the "30" suffix per Maxim's Threshold Suffix Guide. This value is guaranteed by design and validated across temperature, ensuring consistent brownout detection in battery-powered systems using the MAX6865UK30D6L+T.
Does the MAX6865UK30D6L+T support active-high reset output?
Yes, the MAX6865UK30D6L+T features an active-high push-pull RESET output (Pin 1), which transitions high when VCC drops below 3.000V, MR is asserted, or the watchdog timer expires. This eliminates the need for external pullup resistors and simplifies interface with µPs requiring high-active reset signals - a core functional attribute of the MAX6865UK30D6L+T.
What is the watchdog timeout period for the MAX6865UK30D6L+T?
The MAX6865UK30D6L+T uses the "L" watchdog suffix, providing a typical timeout period of 209s (min 95s, max 487s). This long-duration watchdog is designed for firmware with extended idle or sleep cycles, and it clears on any rising or falling edge at the WDI pin - a defining behavior of the MAX6865UK30D6L+T's supervision logic.
Can the MAX6865UK30D6L+T operate down to 1.2V supply voltage?
Yes, the MAX6865UK30D6L+T operates across VCC = 1.2V to 5.5V and guarantees valid RESET assertion down to VCC = +1.1V. At 1.2V, its supply current remains ultra-low (typ 190nA), and RESET output maintains VOH ≥ 0.8×VCC - making the MAX6865UK30D6L+T suitable for single-cell Li-ion or alkaline systems under brownout conditions.
Is manual reset (MR) supported on the MAX6865UK30D6L+T?
Yes, the MAX6865UK30D6L+T includes an active-low MR input (Pin 3) with internal 10kΩ pullup to VCC. A logic-low pulse ≥1µs on MR forces immediate reset assertion for the full 1200ms timeout period. This hardware reset capability is fully integrated and requires no external components - a standard feature of the MAX6865UK30D6L+T across its operating range.
MAX6865UK30D6L+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:
- 600ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6865UK30D6L+T FAQ
1.How can I place an order for MAX6865UK30D6L+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6865UK30D6L+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 MAX6865UK30D6L+T reliable?
The price and inventory of MAX6865UK30D6L+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6865UK30D6L+T is usually 5 days.
3.What payment methods are accepted for MAX6865UK30D6L+T?
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4.How is shipping managed for MAX6865UK30D6L+T?
MAX6865UK30D6L+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6865UK30D6L+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 MAX6865UK30D6L+T?
For technical support, including MAX6865UK30D6L+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6865UK30D6L+T requirements.
6.How does Aetrix verify that MAX6865UK30D6L+T is sourced from the original manufacturer or authorized distributors?
All MAX6865UK30D6L+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 MAX6865UK30D6L+T meets industry standards.
7.What is the process for return or replacement of MAX6865UK30D6L+T?
All MAX6865UK30D6L+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6865UK30D6L+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 MAX6865UK30D6L+T part is unused and in its original packaging.
Return procedure for MAX6865UK30D6L+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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