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Analog Devices Inc./Maxim Integrated MAX6863UK26+
- Part No.:
- MAX6863UK26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6863UK26+.pdf
- Description:
- IC MPU SUPERVISOR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,091
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Product details
Overview
MAX6863UK26+ from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring pin-selectable 10ms/150ms (min) reset timeout, 2.625V factory-trimmed reset threshold, and active-low open-drain reset output. It monitors VCC, responds to manual reset (MR), and guarantees valid reset assertion down to VCC = +1.1V - used in glucose monitors and battery-powered medical devices for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6863UK26+ datasheet, MAX6863UK26+ pinout, MAX6863UK26+ application, or MAX6863UK26+ equivalent, this page delivers verified electrical specs, pin-level design meaning, real-world use cases, and validated alternative options - all confirmed for the exact MAX6863UK26+ variant with UK26 threshold and no watchdog timer.
Technical Context
The MAX6863UK26+ implements a precision voltage monitor with ±2.5% reset threshold accuracy over -40°C to +85°C, coupled with a user-configurable reset timeout generator via the CT pin (low = 10ms min, high = 150ms min). Its internal 10kΩ MR pullup and 170nA typical supply current enable direct integration into ultra-low-power systems without external biasing.
Unlike watchdog-equipped variants (e.g., MAX6864–MAX6869), the MAX6863UK26+ omits WDI functionality and is strictly a voltage-monitoring + manual-reset + configurable-timer device. Its open-drain RESET output requires an external pullup and supports logic-level translation across supply domains up to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.625V (factory-trimmed, ±2.5% tolerance) - sets precise brownout detection point for 2.7V–3.0V logic rails. |
| Supply Current | 170nA (typ) at VCC = 1.8V - enables multi-year operation on coin-cell batteries without compromising supervision integrity. |
| Reset Timeout Options | 10ms (min) or 150ms (min), selected by CT pin logic level - provides flexibility for fast-boot MCU vs. slow-ramping analog subsystems. |
| Valid Reset Down to | VCC = +1.1V - ensures deterministic reset assertion even during deep brownout, critical for data retention safety. |
| MR Input Behavior | Active-low, internally pulled up to VCC via 10kΩ - allows direct switch-to-GND connection with no external components. |
| RESET Output Type | Open-drain active-low - enables wired-OR reset busing and voltage-level shifting (e.g., 1.8V supervisor driving 3.3V µP reset). |
| VCC Transient Immunity | Immune to ≤40µs transients at 100mV overdrive - suppresses false resets from switching noise or ESD-induced supply glitches. |
Pinout & Package
Package: 5-pin SOT23-5 (lead-free, RoHS-compliant), footprint-compatible with industry-standard 5-pin SOT23 supervisors.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CT | Reset timeout select input: logic low → 10ms (min) timeout; logic high (typically VCC) → 150ms (min) timeout. No pullup/pulldown required. |
| 2 | GND | Ground reference for all internal circuits and reset timing. Must connect to system ground plane with low-inductance path. |
| 3 | MR | Active-low manual reset input. Internally pulled up to VCC (10kΩ); drives reset when pulled to GND. Accepts CMOS-compatible levels. |
| 4 | RESET | Open-drain active-low reset output. Requires external pullup resistor (value depends on bus capacitance and voltage domain). |
| 5 | VCC | Supply input and monitored voltage rail. Bypass with 0.1µF ceramic capacitor to GND close to pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current - eliminates need for power-gating circuitry in always-on health monitoring systems. |
| Pin-selectable tRP | Hardware-configured 10ms/150ms reset timeout via CT pin - avoids firmware dependency and enables board-level tuning. |
| No external components | Integrated MR pullup, precision voltage reference, and timeout oscillator - reduces BOM count and PCB area in space-constrained wearables. |
| VCC = +1.1V reset validity | Guaranteed RESET assertion down to 1.1V VCC - ensures safe shutdown before non-volatile memory write corruption occurs. |
| Open-drain RESET | Supports mixed-voltage system reset busing and level-shifting without additional translators or MOSFETs. |
Applications
| Glucose Monitoring Devices | Patient Vital Sign Monitors |
|---|---|
Use Scenario: Portable handheld glucose meters powered by CR2032 coin cell, requiring guaranteed reset during battery voltage sag and cold-temperature operation. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low open-drain RESET to ARM Cortex-M0 MCU upon VCC drop below 2.625V or MR button press. Use Value: 170nA ICC extends battery life beyond 2 years; 10ms timeout option enables rapid boot after button-initiated self-test. |
Use Scenario: Battery-backed bedside patient monitor with ECG, SpO₂, and temperature sensors, operating across -20°C to +50°C ambient. IC Role / Device Role / Timing Role: Primary brownout detector ensuring MCU reset before ADC reference collapse, with CT pin hardwired to VCC for 150ms timeout. Use Value: Valid reset down to VCC = +1.1V prevents corrupted sensor calibration writes; ±2.5% VTH tolerance meets IEC 60601-1 margin requirements. |
| Wireless Hearing Aids | Industrial Handheld Scanners |
Use Scenario: Rechargeable hearing aid with ultra-low-power DSP, where every nanoamp affects daily runtime and acoustic performance. IC Role / Device Role / Timing Role: Nanopower supervisor enabling "instant-on" wake-from-standby via MR button, with open-drain RESET tied to DSP reset pin. Use Value: 170nA ICC contributes <0.01% of total standby current; open-drain output interfaces directly to 1.2V DSP core without level shifter. |
Use Scenario: Ruggedized barcode scanner using Li-ion battery and cold-cranking operation in warehouse freezers (-10°C). IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 3.3V rail and provides manual reset via trigger-button MR input. Use Value: Immunity to 40µs VCC transients prevents false resets during motor-driven scan actuation; 150ms timeout accommodates slow LCD initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K26DBVR | 2.63V reset threshold, 200ms fixed timeout, push-pull active-low RESET, 1.2µA ICC (10× higher than MAX6863UK26+) | Suitable for cost-sensitive industrial controls where 170nA ICC is unnecessary and fixed timeout suffices | Select if board layout already uses TPS3836 footprint and µA-level ICC is acceptable |
| MAX6316LUK26D3+ | 2.63V threshold, 200ms timeout, 1.2µA ICC, same SOT23-5 package but no CT pin or manual reset input | Applicable only where manual reset is omitted and longer timeout is acceptable | Choose only when MR functionality is unused and lower ICC is not required |
Compared with TPS3836K26DBVR and MAX6316LUK26D3+, the MAX6863UK26+ uniquely delivers sub-µA ICC, pin-selectable timeout, and MR support in one 5-pin SOT23 - making it irreplaceable in multi-year battery-powered medical devices demanding both configurability and ultra-low quiescent current.
Availability
MAX6863UK26+ is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign monitors, wireless hearing aids, and industrial handheld scanners requiring stable component supply across extended product lifecycles.
Supply support for MAX6863UK26+ 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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX68xx family targets ultra-low-power microprocessor supervision in battery-critical systems - delivering nanopower operation, factory-trimmed accuracy, and minimal external component count for portable healthcare and IoT edge devices.
FAQ
What is the exact reset threshold voltage of MAX6863UK26+?
The MAX6863UK26+ has a factory-trimmed reset threshold of 2.625V, with ±2.5% tolerance over -40°C to +85°C. This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "26" corresponds to 2.625V nominal. The MAX6863UK26+ does not require external calibration or trimming to achieve this specification.
Does MAX6863UK26+ include a watchdog timer function?
No, the MAX6863UK26+ does not include a watchdog timer. It belongs to the MAX6861/MAX6862/MAX6863 subgroup, which features pin-selectable reset timeout (via CT) and manual reset (MR), but omits the WDI input and watchdog circuitry found in MAX6864–MAX6869 variants. The MAX6863UK26+ is strictly a voltage monitor + MR + configurable-timer device.
How do I configure the reset timeout period on MAX6863UK26+?
The reset timeout on MAX6863UK26+ is configured using the CT pin (Pin 1): connect CT to GND for 10ms (min) timeout, or connect CT to VCC for 150ms (min) timeout. This selection is sampled at reset assertion and remains effective until the next reset event. No external resistor or capacitor is needed - the timing is fully integrated and factory-characterized.
What type of RESET output does MAX6863UK26+ provide?
The MAX6863UK26+ provides an open-drain active-low RESET output (Pin 4). It requires an external pullup resistor to the target logic voltage (e.g., 1.8V, 3.3V, or 5V). This configuration enables voltage-level translation, wired-OR reset busing, and compatibility with µPs that accept open-drain reset inputs - unlike push-pull variants that fix the output voltage to VCC.
Is MAX6863UK26+ pin-compatible with other SOT23-5 supervisors?
Yes, the MAX6863UK26+ uses standard 5-pin SOT23-5 packaging and shares identical pinout with MAX6861/MAX6862 and pin-compatible equivalents like TPS3836/TPS3837/TPS3838 (as noted in the datasheet Features section). However, function mapping differs: CT (Pin 1) replaces I.C. or WDI on other variants, so PCB reuse requires verification of signal routing and absence of conflicting functions.
MAX6863UK26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6863UK26+ FAQ
1.How can I place an order for MAX6863UK26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6863UK26+ 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 MAX6863UK26+ reliable?
The price and inventory of MAX6863UK26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6863UK26+ is usually 5 days.
3.What payment methods are accepted for MAX6863UK26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6863UK26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6863UK26+?
MAX6863UK26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6863UK26+ 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 MAX6863UK26+?
For technical support, including MAX6863UK26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6863UK26+ requirements.
6.How does Aetrix verify that MAX6863UK26+ is sourced from the original manufacturer or authorized distributors?
All MAX6863UK26+ 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 MAX6863UK26+ meets industry standards.
7.What is the process for return or replacement of MAX6863UK26+?
All MAX6863UK26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6863UK26+, 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 MAX6863UK26+ part is unused and in its original packaging.
Return procedure for MAX6863UK26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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