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Analog Devices Inc./Maxim Integrated MAX6863UK27+T
- Part No.:
- MAX6863UK27+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6863UK27+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,675
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Product details
Overview
The MAX6863UK27+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring pin-selectable 10ms/150ms reset timeout, active-low open-drain reset output, and manual reset input. It monitors VCC from 1.2V to 5.5V, asserts reset below factory-trimmed 2.700V threshold (±2.5%), and guarantees valid reset down to VCC = +1.1V - ideal for battery-powered glucose monitors and portable medical devices.
For engineers reviewing the MAX6863UK27+T datasheet, MAX6863UK27+T pinout, MAX6863UK27+T application, or MAX6863UK27+T equivalent, key selection criteria include its 170nA typical supply current, immunity to short VCC transients (<40µs at 100mV overdrive), CT-pin programmable reset delay, and compatibility with low-voltage µP reset inputs requiring guaranteed assertion down to 1.1V.
Technical Context
The MAX6863UK27+T implements a precision voltage monitor with hysteresis (0.5% of VTH) and a digital timeout generator controlled by the CT pin: logic low selects D1 (10ms min), high selects D3 (150ms min). Its internal 10kΩ MR pullup enables direct switch-to-GND manual reset without external components.
Unlike watchdog-equipped variants (e.g., MAX6864–MAX6869), the MAX6863UK27+T omits WDI functionality and relies solely on VCC monitoring and MR assertion. Its open-drain RESET output requires an external pullup and supports level-shifting across 0–5.5V logic domains while maintaining guaranteed sink capability down to VCC = 1.1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.700V ±2.5% - factory-trimmed for precise brownout detection at nominal 2.7V rails |
| Supply Current (typ) | 170nA at VCC = 1.8V - enables multi-year operation on coin-cell batteries |
| Reset Timeout Options | 10ms or 150ms (min) - selected via CT pin, eliminating need for external timing components |
| Operating Voltage Range | 1.2V to 5.5V - supports single-cell Li-ion, 3.3V, and 5V systems |
| Valid Reset Down to | VCC = +1.1V - ensures reliable reset assertion during deep brownout conditions |
| MR Input Glitch Rejection | 200ns - rejects noise spikes on manual reset line without external filtering |
| Reset Output Type | Active-low open-drain - allows flexible pullup to any logic rail (0–5.5V) |
Pinout & Package
Package: 5-pin SOT23 (lead-free, +T suffix), 2.9mm × 1.6mm footprint, 1.1mm height - compatible with standard high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CT | Reset Timeout Select Input | Logic low = 10ms min timeout (D1); logic high = 150ms min timeout (D3); internally biased if unconnected |
| 2 - GND | Ground Reference | Primary return path for all internal circuits; must connect to system ground plane |
| 3 - MR | Active-Low Manual Reset Input | Pull to GND to assert reset; internally pulled up to VCC via 10kΩ; accepts CMOS-level signals |
| 4 - RESET | Active-Low Open-Drain Reset Output | Drives low during reset; requires external pullup resistor; sinks ≥50µA at VCC ≥ 1.1V |
| 5 - VCC | Supply Voltage Input | Monitored power rail input; bypass with 0.1µF ceramic capacitor to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 170nA typical - extends battery life in always-on portable medical sensors |
| Pin-selectable reset timeout | 10ms or 150ms via CT pin - eliminates BOM cost and layout area of external RC timing network |
| Guaranteed reset validity | Down to VCC = +1.1V - ensures deterministic reset behavior during severe undervoltage events |
| Open-drain RESET output | Compatible with 0–5.5V logic domains - enables level-shifting for mixed-voltage µP interfaces |
| VCC transient immunity | Rejects <40µs glitches at 100mV overdrive - prevents spurious resets in noisy power environments |
Applications
| Glucose Monitors | Portable ECG Devices |
|---|---|
|
Use Scenario: Continuous blood glucose sensing in handheld or wearable units powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Supervises 1.8V analog front-end and 3.3V MCU supply; asserts reset on battery sag below 2.7V threshold. Use Value: 170nA supply current enables >5-year battery life; 10ms timeout ensures rapid recovery after brief voltage dips. |
Use Scenario: Battery-operated single-lead ECG recorders used in remote patient monitoring. IC Role / Device Role / Timing Role: Monitors 3.3V rail powering ADC and BLE radio; provides manual reset via tactile button connected to MR. Use Value: CT-pin selectable 150ms timeout prevents nuisance resets during RF transmission bursts; open-drain RESET interfaces cleanly to 3.3V µP reset pin. |
| Wireless Pulse Oximeters | Handheld Diagnostic Scanners |
|
Use Scenario: Low-power SpO₂ measurement units using red/IR LEDs and photodiode amplifier. IC Role / Device Role / Timing Role: Resets system when 2.5V LDO output drops due to battery aging or cold-temperature derating. Use Value: Valid reset down to VCC = 1.1V ensures fail-safe shutdown before analog sensor drift occurs; 200ns MR glitch rejection ignores ESD-induced noise. |
Use Scenario: Ruggedized field scanners for point-of-care diagnostics with intermittent USB charging. IC Role / Device Role / Timing Role: Supervises dual-rail 1.2V core and 3.3V I/O supplies; MR tied to service-mode button for technician-initiated firmware reload. Use Value: SOT23-5 footprint minimizes PCB area in space-constrained enclosures; no external components reduce assembly cost and test points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6861UK27+T | Same 2.7V threshold and CT-selectable 10ms/150ms timeout, but push-pull active-low RESET output | Requires VCC-referenced reset signaling; unsuitable for level-shifting or wired-OR configurations | Select when interfacing to µPs with dedicated VCC-referenced reset inputs and no need for logic-level translation |
| TPS3836K27DBVR | 2.7V threshold, fixed 200ms timeout, push-pull active-low RESET, 1.6µA supply current | Higher ICC limits battery lifetime; no manual reset or timeout select; pin-compatible but functionally reduced | Choose for cost-sensitive industrial controls where ultra-low current is non-critical and fixed timeout suffices |
Compared with MAX6861UK27+T, the MAX6863UK27+T's open-drain output enables flexible voltage-domain interfacing, while versus TPS3836K27DBVR, its 170nA current and CT-programmability deliver superior energy efficiency and design adaptability in portable medical electronics.
Availability
MAX6863UK27+T is available at Aetrix Electronics and suitable for glucose monitors, portable ECG devices, wireless pulse oximeters, and handheld diagnostic scanners requiring stable component supply across long-life medical product cycles.
Supply support for MAX6863UK27+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 demanding applications in industrial, medical, and communications markets.
The MAX6854–MAX6869 family delivers nanopower supervisory functions targeting battery-critical portable medical and consumer electronics, emphasizing ultra-low ICC, guaranteed low-VCC reset validity, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the MAX6863UK27+T?
The MAX6863UK27+T has a factory-trimmed reset threshold voltage of 2.700V with ±2.5% tolerance over temperature (–40°C to +85°C). This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "27" corresponds to VTH = 2.700V. The MAX6863UK27+T maintains this accuracy without external calibration.
How does the CT pin configure the reset timeout period on the MAX6863UK27+T?
The CT pin on the MAX6863UK27+T selects between two minimum reset timeout periods: connecting CT to GND selects D1 (10ms min), while connecting CT to VCC selects D3 (150ms min). These values are specified in Table 1 and Electrical Characteristics (tRP parameter). The selection takes effect immediately upon CT state change, even during an active timeout.
Does the MAX6863UK27+T include a watchdog timer function?
No, the MAX6863UK27+T does not include a watchdog timer. It belongs to the MAX6861/MAX6862/MAX6863 subgroup, which features only VCC monitoring, manual reset (MR), and CT-selectable timeout - as confirmed in the Selector Guide and Pin Description sections. Watchdog functionality is exclusive to MAX6864–MAX6869 variants (WDI pin present).
What is the maximum supply voltage the MAX6863UK27+T can monitor?
The MAX6863UK27+T monitors supply voltages from 1.2V to 5.5V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Its VCC pin accepts up to 5.5V continuously, and the internal voltage reference remains stable across this full range - enabling use in both low-voltage portable systems and legacy 5V designs.
Is the RESET output of the MAX6863UK27+T compatible with 1.8V microcontrollers?
Yes, the MAX6863UK27+T's open-drain RESET output is fully compatible with 1.8V µCs. When pulled up to 1.8V, it asserts low with VOL ≤ 0.3V (tested at ISINK = 50µA, VCC ≥ 1.1V), satisfying 1.8V logic low thresholds. Its voltage-domain independence - confirmed in "Interfacing to Other Voltages" section - allows direct connection without level shifters.
MAX6863UK27+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:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6863UK27+T FAQ
1.How can I place an order for MAX6863UK27+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6863UK27+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 MAX6863UK27+T reliable?
The price and inventory of MAX6863UK27+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6863UK27+T is usually 5 days.
3.What payment methods are accepted for MAX6863UK27+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6863UK27+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6863UK27+T?
MAX6863UK27+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6863UK27+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 MAX6863UK27+T?
For technical support, including MAX6863UK27+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6863UK27+T requirements.
6.How does Aetrix verify that MAX6863UK27+T is sourced from the original manufacturer or authorized distributors?
All MAX6863UK27+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 MAX6863UK27+T meets industry standards.
7.What is the process for return or replacement of MAX6863UK27+T?
All MAX6863UK27+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6863UK27+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 MAX6863UK27+T part is unused and in its original packaging.
Return procedure for MAX6863UK27+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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