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Analog Devices Inc./Maxim Integrated MAX6865UK27D6S+T
- Part No.:
- MAX6865UK27D6S+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6865UK27D6S+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,118
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Product details
Overview
MAX6865UK27D6S+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 2.7V reset threshold (±2.5%), 1200ms 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 power-on reset and code-execution error recovery.
For engineers reviewing the MAX6865UK27D6S+T datasheet, MAX6865UK27D6S+T pinout, MAX6865UK27D6S+T application, or MAX6865UK27D6S+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-voltage systems requiring minimal quiescent current.
Technical Context
The MAX6865UK27D6S+T implements a dual-monitoring architecture: a precision voltage detector with hysteresis (0.5% of VTH) triggers reset on VCC drop below 2.7V, while a watchdog timer monitors WDI activity-resetting if no edge occurs within 209s (typ). Its internal 10kΩ MR pullup and glitch rejection (200ns) enable robust manual reset without external components.
Unlike basic supervisors, this device integrates three independent assertion sources-VCC brownout, MR assertion, and watchdog timeout-with synchronized deassertion after a fixed 1200ms timeout. The push-pull active-high RESET output drives directly to VCC, eliminating need for external pullups and ensuring logic-level compatibility across 1.2V–5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typ at VCC = 1.8V - enables multi-year operation on coin-cell batteries in portable medical devices. |
| Reset Threshold Voltage | 2.7V ±2.5% - factory-trimmed for precise brownout detection at nominal 2.7V rail, critical for Li-ion battery monitoring. |
| Reset Timeout Period | 1200ms min - ensures µP completes full power-up initialization before release, preventing premature execution. |
| Watchdog Timeout | 209s typ - long-duration supervision suitable for infrequently updated firmware in remote sensors. |
| VCC Validity Range | 1.1V to 5.5V - guarantees functional reset assertion even during deep brownout, supporting ultra-low-voltage operation. |
| MR Input Glitch Rejection | 200ns - suppresses EMI-induced false resets in high-noise industrial handhelds. |
| WDI Pulse Width | 150ns min - allows fast software-triggered watchdog clears without timing overhead. |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-high) | Push-pull output asserted high during reset; sinks no current when deasserted-directly interfaces µP reset pin without pullup. |
| 2 | GND | Ground reference for all internal circuits; must be connected to system ground plane for noise immunity. |
| 3 | MR (active-low) | Manual reset input with internal 10kΩ pullup to VCC; driven low by switch or logic to force reset regardless of VCC state. |
| 4 | WDI | Watchdog input detecting rising/falling edges; must toggle within 209s to prevent timeout-induced reset. |
| 5 | VCC | Supply voltage input monitored for brownout; bypass with 0.1µF capacitor to GND for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current extends battery life in glucose monitors and wearable sensors beyond 5 years. |
| Guaranteed reset at VCC = 1.1V | Ensures deterministic reset behavior during deep discharge, unlike competitors failing below 1.2V. |
| Immunity to short VCC transients | Rejects <40µs glitches at 100mV overdrive-critical for automotive accessory modules with noisy power rails. |
| No external components required | Integrates MR pullup, voltage reference, and watchdog oscillator-reduces BOM count and PCB area by 30% vs discrete solutions. |
| Push-pull active-high RESET | Eliminates external pullup resistor and associated leakage, simplifying interface with 3.3V/5V µPs and reducing standby power. |
Applications
| Glucose Monitors | Patient Monitors |
|---|---|
Use Scenario: Continuous blood glucose sensing in disposable patch pumps with CR2032 coin-cell power. IC Role / Device Role / Timing Role: Supervises 2.7V regulated rail and validates µP boot sequence; asserts RESET until stable clock and memory initialization complete. Use Value: Prevents erratic insulin dosing due to brownout-induced firmware corruption, meeting ISO 14971 risk management requirements. |
Use Scenario: Portable ECG units powered by rechargeable Li-ion batteries with variable voltage profiles. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and provides 1200ms reset hold-off to allow ADC calibration and display initialization. Use Value: Guarantees clinical-grade data acquisition startup integrity, eliminating false arrhythmia alerts from partial boot failures. |
| MP3 Players | Cell Phones (Feature Phones) |
Use Scenario: Flash-memory-based audio players using single-cell Li-ion (2.7–4.2V range). IC Role / Device Role / Timing Role: Detects 2.7V undervoltage threshold and initiates graceful shutdown before NAND write corruption occurs. Use Value: Preserves user playlist and firmware integrity during battery depletion, avoiding bricking after deep discharge. |
Use Scenario: Legacy GSM handsets with 2.8V core rail and intermittent RF transmission surges. IC Role / Device Role / Timing Role: Provides watchdog supervision of baseband processor via WDI; resets on firmware hang during call setup. Use Value: Restores voice service within 209s without user intervention, improving MTBF in high-temperature environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33DBVR | Fixed 3.3V reset threshold; no watchdog; 200ms timeout; open-drain output requires pullup. | Suitable only for fixed 3.3V systems without software hang protection. | Select when cost sensitivity outweighs need for programmable threshold or watchdog functionality. |
| STM6315SW33F | 2.93V reset threshold; 1.6s timeout; no WDI; 350nA supply current; push-pull active-low output. | Lacks watchdog capability and has higher ICC-unsuitable for long-life battery applications. | Choose for legacy designs already using STM63xx family and requiring pin-compatible replacement without watchdog. |
Compared with MAX6865UK27D6S+T, TPS3836K33DBVR offers lower unit cost but sacrifices brownout flexibility and system-level fault recovery, while STM6315SW33F provides longer timeout yet doubles supply current and omits watchdog-making MAX6865UK27D6S+T optimal for safety-critical, ultra-low-power embedded systems requiring both voltage and software supervision.
Availability
MAX6865UK27D6S+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitors, and portable audio equipment requiring stable component supply with guaranteed long-term availability and lead-free compliance.
Supply support for MAX6865UK27D6S+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 demanding industrial and medical applications.
The MAX6854–MAX6869 family delivers nanopower supervisory functions targeting battery-operated medical devices and portable electronics where ultra-low ICC and guaranteed reset validity at sub-1.2V are mandatory design requirements.
FAQ
What is the exact reset threshold voltage for MAX6865UK27D6S+T?
The MAX6865UK27D6S+T features a factory-trimmed reset threshold of 2.7V with ±2.5% tolerance over temperature (-40°C to +85°C), corresponding to suffix '27' per Maxim's Threshold Suffix Guide. This value is guaranteed by design and tested during production, ensuring accurate brownout detection for 2.7V nominal rails in MAX6865UK27D6S+T applications.
Does MAX6865UK27D6S+T support watchdog timer functionality?
Yes, MAX6865UK27D6S+T includes a watchdog timer with 209s typical timeout (suffix 'L'), activated via the WDI pin. It resets the system if no edge is detected on WDI within that period. The watchdog clears on any WDI transition, MR assertion, or RESET assertion-ensuring MAX6865UK27D6S+T provides both power and software fault coverage.
What is the function of the RESET pin on MAX6865UK27D6S+T?
The RESET pin on MAX6865UK27D6S+T is a push-pull active-high output. It drives high during reset conditions (VCC < 2.7V, MR low, or watchdog timeout) and low otherwise. Unlike open-drain variants, it requires no external pullup, simplifying interface with µP reset inputs and reducing standby current in MAX6865UK27D6S+T designs.
Can MAX6865UK27D6S+T operate reliably at VCC = 1.1V?
Yes, MAX6865UK27D6S+T guarantees valid reset assertion down to VCC = +1.1V, as specified in its Absolute Maximum Ratings and Electrical Characteristics. This ensures deterministic behavior during deep brownout-critical for maintaining system integrity in MAX6865UK27D6S+T-powered medical devices operating near end-of-battery life.
What package type and lead finish does MAX6865UK27D6S+T use?
MAX6865UK27D6S+T is supplied in a 5-pin SOT23-5 package with lead-free (RoHS-compliant) finish, indicated by the '+T' suffix. It operates across -40°C to +85°C and requires standard SMT reflow profiles-enabling direct drop-in use in MAX6865UK27D6S+T-based production lines without process changes.
MAX6865UK27D6S+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:
- 2.7V
- 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
MAX6865UK27D6S+T FAQ
1.How can I place an order for MAX6865UK27D6S+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6865UK27D6S+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 MAX6865UK27D6S+T reliable?
The price and inventory of MAX6865UK27D6S+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6865UK27D6S+T is usually 5 days.
3.What payment methods are accepted for MAX6865UK27D6S+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6865UK27D6S+T transactions.
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4.How is shipping managed for MAX6865UK27D6S+T?
MAX6865UK27D6S+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6865UK27D6S+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 MAX6865UK27D6S+T?
For technical support, including MAX6865UK27D6S+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6865UK27D6S+T requirements.
6.How does Aetrix verify that MAX6865UK27D6S+T is sourced from the original manufacturer or authorized distributors?
All MAX6865UK27D6S+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 MAX6865UK27D6S+T meets industry standards.
7.What is the process for return or replacement of MAX6865UK27D6S+T?
All MAX6865UK27D6S+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6865UK27D6S+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 MAX6865UK27D6S+T part is unused and in its original packaging.
Return procedure for MAX6865UK27D6S+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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