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Analog Devices Inc./Maxim Integrated MAX6865UK17D1S+T
- Part No.:
- MAX6865UK17D1S+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6865UK17D1S+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,480
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Product details
Overview
The MAX6865UK17D1S+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 1.665V reset threshold (suffix '17'), 10ms minimum reset timeout (D1), and watchdog timer with 3.3s typical timeout (S suffix). It monitors VCC, responds to manual reset (MR), and asserts reset on voltage drop, MR assertion, or watchdog expiration - used in battery-powered medical and portable electronics.
For engineers reviewing the MAX6865UK17D1S+T datasheet, MAX6865UK17D1S+T pinout, MAX6865UK17D1S+T application, or MAX6865UK17D1S+T equivalent, key selection criteria include its 1.665V reset threshold accuracy, 10ms reset timeout, 3.3s watchdog period, push-pull active-low RESET output, and guaranteed reset validity down to VCC = +1.1V in -40°C to +85°C operation.
Technical Context
The MAX6865UK17D1S+T integrates a precision voltage monitor, manual reset input (MR), and watchdog timer with edge-triggered WDI input that clears on rising/falling edges. Its internal reset timeout generator ensures minimum 10ms assertion after VCC recovery or MR release.
It uses BiCMOS process (2848 transistors) for low-power operation and includes immunity to short VCC transients (<40µs at 100mV overdrive) and guaranteed reset assertion down to VCC = +1.1V - critical for brownout detection in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typical at +25°C - enables multi-year battery life in always-on medical monitors. |
| Reset Threshold Voltage | 1.665V (±2.5%) - factory-trimmed for precise 1.8V rail supervision with hysteresis of 0.5%VTH. |
| Reset Timeout Period | 10ms minimum - ensures µP completes power-up initialization before release. |
| Watchdog Timeout | 3.3s typical (S suffix) - detects firmware hangs in embedded control loops without excessive timeout latency. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable medical equipment environments. |
| Reset Output Type | Push-pull active-low - eliminates external pullup, drives directly into CMOS reset inputs. |
| VCC Validity Range | Reset asserted valid down to VCC = +1.1V - guarantees reliable brownout detection below 1.2V logic thresholds. |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, surface-mount, footprint compatible with industry-standard 5-pin SOT23 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; sinks current when asserted, referenced to VCC; no external pullup required. |
| 2 | GND | Ground reference for all internal circuitry; must be connected to system ground plane for noise immunity. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC via 10kΩ; accepts CMOS logic levels; 1µs minimum pulse width. |
| 4 | WDI | Watchdog input; edge-sensitive (150ns min pulse); clears internal timer on rising or falling edge; high/low >3.3s triggers reset. |
| 5 | VCC | Supply voltage input (1.2V–5.5V); monitored for reset generation; requires 0.1µF bypass capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical enables >10-year battery life in glucose monitors powered by CR2032 cells. |
| Reset threshold accuracy | ±2.5% over -40°C to +85°C ensures reliable 1.8V rail supervision without margining overhead. |
| Watchdog edge detection | Detects 150ns pulses on WDI - supports high-frequency software heartbeat toggling without false timeouts. |
| VCC transient immunity | Immune to <40µs VCC glitches at 100mV overdrive - prevents spurious resets in noisy automotive or industrial environments. |
| No external components | Internal MR pullup, fixed timeout, and factory-trimmed VTH eliminate BOM count and layout area vs. discrete solutions. |
Applications
| Portable Medical Devices | Battery-Powered IoT Sensors |
|---|---|
Use Scenario: Glucose meters and patient monitors operating from single-cell lithium coin batteries with strict power budget constraints. IC Role / Device Role / Timing Role: Supervises 1.8V system rail, asserts reset during battery voltage sag, and triggers watchdog if firmware stalls during measurement sequence. Use Value: 170nA supply current extends battery life beyond 3 years; 1.665V threshold matches LDO output tolerance; 10ms reset ensures clean µP boot after brownout. |
Use Scenario: Wireless environmental sensors deployed in remote locations, transmitting data every 5 minutes using BLE. IC Role / Device Role / Timing Role: Monitors VCC during wake-up from deep sleep; resets MCU if supply drops below 1.665V; watchdog prevents infinite loop in sensor read/RF transmit firmware. Use Value: 3.3s watchdog timeout aligns with maximum expected task duration; push-pull RESET drives MCU reset pin directly without pullup resistor. |
| Wearable Health Trackers | Industrial Handheld Terminals |
Use Scenario: Compact wrist-worn devices with constrained PCB area and tight thermal limits. IC Role / Device Role / Timing Role: Provides voltage monitoring and manual reset via button press; asserts reset within 250ns of MR activation; guarantees reset validity down to VCC = +1.1V. Use Value: 5-pin SOT23 footprint saves >1.5mm² vs. SOIC-8 alternatives; 10kΩ internal MR pullup eliminates external component; 1.1V VCC operation covers full battery discharge curve. |
Use Scenario: Rugged handheld terminals used in warehouse logistics, powered by rechargeable Li-ion packs with variable voltage profiles. IC Role / Device Role / Timing Role: Supervises 3.3V rail derived from buck converter; detects undervoltage during rapid load transients; watchdog guards against UI freeze during barcode scanning. Use Value: Immunity to 40µs VCC transients prevents false resets during motor-driven scanner actuation; ±2.5% VTH tolerance accommodates converter output drift across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6864UK17D1S+T | No CT pin; identical VTH (1.665V), timeout (10ms), watchdog (3.3s), and pinout - differs only in absence of reset timeout select function. | Suitable where fixed 10ms timeout suffices; lacks CT pin flexibility but shares same footprint and electrical behavior. | Select MAX6864UK17D1S+T if CT functionality is unused and cost minimization is prioritized. |
| TPS3836K33DBVR | Fixed 3.3V reset threshold; 200ms reset timeout; no watchdog; 1.25µA ICC - higher quiescent current and no WDI capability. | Applicable only for 3.3V rail supervision without watchdog requirements; not suitable for sub-2V systems or firmware hang detection. | Choose TPS3836K33DBVR only for simple 3.3V power-good monitoring where ultra-low ICC and watchdog are unnecessary. |
Compared with MAX6864UK17D1S+T, the MAX6865UK17D1S+T offers identical core supervision but adds CT pin support for timeout selection - though unused here, it provides future design flexibility. Versus TPS3836K33DBVR, MAX6865UK17D1S+T delivers 7× lower ICC, 1.665V threshold matching modern low-voltage rails, and integrated watchdog - making it superior for battery-critical, safety-aware applications.
Availability
MAX6865UK17D1S+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, wearable health trackers, and industrial handheld terminals requiring stable component supply across extended production lifecycles.
Supply support for MAX6865UK17D1S+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 management, sensing, and interface applications in industrial, medical, and communications markets.
The MAX6854–MAX6869 family targets ultra-low-power microprocessor supervision in space- and energy-constrained systems - emphasizing nanopower operation, factory-trimmed accuracy, and integrated watchdog functionality for safety-critical firmware monitoring.
FAQ
What is the exact reset threshold voltage of the MAX6865UK17D1S+T?
The MAX6865UK17D1S+T has a factory-trimmed reset threshold voltage of 1.665V, with ±2.5% tolerance over the full -40°C to +85°C temperature range. This value is confirmed by the '17' threshold suffix in the part number and is specified in Table 2 of the datasheet. The device guarantees reset assertion while VCC falls below this threshold and maintains reset for the full 10ms timeout after VCC rises above it.
Does the MAX6865UK17D1S+T require external components for basic operation?
No, the MAX6865UK17D1S+T operates autonomously with no external components required. It features an internal 10kΩ pullup on the MR pin, factory-trimmed reset threshold and timeout, and push-pull active-low RESET output that drives directly into µP reset inputs. Only a 0.1µF bypass capacitor on VCC to GND is recommended for noise immunity - no resistors, capacitors, or trimmers are needed for core supervision functionality.
How does the watchdog timer in the MAX6865UK17D1S+T function?
The MAX6865UK17D1S+T watchdog timer monitors the WDI pin and expires if no rising or falling edge occurs for longer than 3.3s (typical, S suffix). Each edge clears the timer; reset assertion also halts counting. Upon timeout, it triggers the 10ms reset pulse. The timer supports 150ns minimum pulse width detection and is immune to noise due to edge-triggered design - enabling robust firmware hang detection without requiring precise timing margins.
Is the MAX6865UK17D1S+T pin-compatible with other devices in the MAX68xx family?
Yes, the MAX6865UK17D1S+T uses the standard 5-pin SOT23-5 package and shares identical pinout with MAX6864/MAX6866/MAX6867–MAX6869 variants: Pin 1 = RESET, Pin 2 = GND, Pin 3 = MR, Pin 4 = WDI, Pin 5 = VCC. This allows direct substitution within the same functional group (watchdog-enabled, MR-supported devices), provided reset threshold, timeout, and output polarity match system requirements.
What is the minimum VCC level at which the MAX6865UK17D1S+T guarantees valid reset operation?
The MAX6865UK17D1S+T guarantees valid reset assertion down to VCC = +1.1V, as explicitly stated in the Electrical Characteristics table. Below this voltage, reset behavior is not characterized. This specification ensures reliable brownout detection even as primary batteries discharge near end-of-life - critical for maintaining system integrity in portable medical and sensor applications.
MAX6865UK17D1S+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:
- 1.665V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 10ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6865UK17D1S+T FAQ
1.How can I place an order for MAX6865UK17D1S+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6865UK17D1S+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 MAX6865UK17D1S+T reliable?
The price and inventory of MAX6865UK17D1S+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6865UK17D1S+T is usually 5 days.
3.What payment methods are accepted for MAX6865UK17D1S+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6865UK17D1S+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6865UK17D1S+T?
MAX6865UK17D1S+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6865UK17D1S+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 MAX6865UK17D1S+T?
For technical support, including MAX6865UK17D1S+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6865UK17D1S+T requirements.
6.How does Aetrix verify that MAX6865UK17D1S+T is sourced from the original manufacturer or authorized distributors?
All MAX6865UK17D1S+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 MAX6865UK17D1S+T meets industry standards.
7.What is the process for return or replacement of MAX6865UK17D1S+T?
All MAX6865UK17D1S+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6865UK17D1S+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 MAX6865UK17D1S+T part is unused and in its original packaging.
Return procedure for MAX6865UK17D1S+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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