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Analog Devices Inc./Maxim Integrated MAX6865UK17D5L+T
- Part No.:
- MAX6865UK17D5L+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6865UK17D5L+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
The MAX6865UK17D5L+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, a factory-trimmed 1.665V reset threshold (suffix '17'), 450ms minimum reset timeout (suffix 'D5'), and 209s typical watchdog timeout (suffix 'L'). It monitors VCC, responds to manual reset (MR), and triggers reset on watchdog timeout (WDI) - used in battery-powered medical and portable electronics for reliable power-on reset and code-execution error recovery.
For engineers reviewing the MAX6865UK17D5L+T datasheet, MAX6865UK17D5L+T pinout, MAX6865UK17D5L+T application, or MAX6865UK17D5L+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed timing parameters (tRP = 450ms min, tWD = 209s typ), reset output type (active-high push-pull), and real-world substitution guidance - all validated against Maxim's official documentation.
Technical Context
This device integrates three core functions: precision voltage monitoring with ±2.5% threshold accuracy down to VCC = 1.1V, a glitch-immune manual reset input with 250ns MR-to-reset delay and internal 10kΩ pullup, and a watchdog timer that clears on any WDI edge and expires if WDI remains static beyond 209s (typ). Its BiCMOS process enables stable operation across –40°C to +85°C.
The MAX6865UK17D5L+T implements an active-high push-pull RESET output referenced to VCC, guaranteeing VOH ≥ 0.8×VCC at ISOURCE = 500µA (VCC ≥ 2.38V) and VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.38V). It requires no external components and supports direct interfacing with µP reset inputs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typical at VCC = 1.8V - enables multi-year battery life in glucose monitors and pagers. |
| Reset Threshold Voltage | 1.665V (factory-trimmed, ±2.5%) - matches 1.8V system brownout detection with margin. |
| Reset Timeout Period | 450ms minimum (D5 option) - ensures full µP initialization before release from reset. |
| Watchdog Timeout | 209s typical (L suffix) - suitable for low-duty-cycle firmware with long idle periods. |
| VCC Operating Range | 1.2V to 5.5V - supports single-cell Li-ion, coin-cell, and 3.3V/5V logic domains. |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and simplifies µP interface. |
| Guaranteed Reset Validity | Down to VCC = 1.1V - ensures deterministic reset assertion during deep brownout. |
Pinout & Package
Package: 5-pin SOT23-5, lead-free (RoHS-compliant), 2.9mm × 1.6mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull reset output - drives µP reset pin high during fault; sinks/source current per spec; no external pullup needed. |
| 2 | GND | Ground reference - must connect to system ground plane; shared return for all internal circuits. |
| 3 | MR | Active-low manual reset input - internally pulled up to VCC (10kΩ); accepts CMOS levels; 1µs minimum pulse width. |
| 4 | WDI | Watchdog input - edge-sensitive (rising/falling); clears internal timer on transition; 150ns minimum pulse width guaranteed. |
| 5 | VCC | Supply voltage input - monitored for reset; bypass with 0.1µF capacitor to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical - extends battery life in wearable medical devices beyond 5 years. |
| Reset threshold accuracy | ±2.5% over –40°C to +85°C - eliminates need for external calibration in field-deployed equipment. |
| Watchdog immunity to stuck states | Clears on any WDI edge - prevents false resets during valid firmware loops and ensures recovery from infinite hangs. |
| VCC transient immunity | No reset for ≤40µs transients at 100mV overdrive - maintains stability in noisy DC-DC converter environments. |
| No external components required | Self-contained supervision - reduces BOM count, PCB area, and qualification effort in space-constrained designs. |
Applications
| Glucose Monitors | Patient Monitoring Devices |
|---|---|
|
Use Scenario: Portable handheld glucose meters powered by CR2032 coin cells operating intermittently over multi-year lifetimes. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high RESET to ARM Cortex-M0 during power-up, brownout, and software hang via WDI. Use Value: 170nA supply current extends battery life to >7 years; 1.665V threshold aligns with 1.8V rail collapse point; 209s watchdog accommodates deep-sleep firmware cycles. |
Use Scenario: Battery-backed bedside patient monitors requiring fail-safe boot and runtime integrity checks. IC Role / Device Role / Timing Role: Resets microcontroller upon VCC drop below 1.665V or MR activation; watchdog enforces firmware liveness every 209s. Use Value: Guaranteed RESET validity to VCC = 1.1V prevents undefined behavior during gradual battery depletion; push-pull output ensures clean reset signal without pullup resistor. |
| Smart Pagers | Industrial Handheld Terminals |
|
Use Scenario: Two-way pagers with intermittent RF transmission, relying on coin-cell backup and low-power sleep modes. IC Role / Device Role / Timing Role: Provides power-on reset and detects firmware lockup via WDI toggling synchronized to message receipt. Use Value: 450ms reset timeout allows full bootloader execution; MR input enables field technician-initiated recovery; SOT23-5 footprint fits tight board layouts. |
Use Scenario: Ruggedized warehouse terminals using Li-ion batteries and exposed to ESD and supply noise. IC Role / Device Role / Timing Role: Monitors main 3.3V rail; asserts RESET on undervoltage or WDI stall; MR supports hardware reset button. Use Value: Immunity to 40µs VCC transients prevents spurious resets near motor drives; 10kΩ internal MR pullup eliminates discrete component. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6864UK16D3S+T | 1.575V reset threshold (vs. 1.665V), 150ms reset timeout (vs. 450ms), 3.3s watchdog (vs. 209s) | Better suited for faster-boot systems with tighter voltage margins; shorter watchdog period demands more frequent WDI toggling | Select when lower threshold and shorter timeout are required - not drop-in due to different timing and trip point |
| TPS3837K33DBVR | 3.08V fixed threshold, 200ms reset timeout, no watchdog, SOT23-5 package, TI part | Lacks watchdog functionality; designed for simpler reset-only use cases without runtime supervision | Choose only if watchdog capability is unnecessary and 3.08V threshold matches system requirements |
Compared with MAX6864UK16D3S+T and TPS3837K33DBVR, the MAX6865UK17D5L+T uniquely combines mid-range voltage supervision (1.665V), extended reset hold time (450ms), and long-interval watchdog (209s) - making it optimal for ultra-low-power medical and portable gear where both robust startup and infrequent firmware validation are critical.
Availability
MAX6865UK17D5L+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitors, smart pagers, and industrial handheld terminals requiring stable component supply across extended production lifecycles.
Supply support for MAX6865UK17D5L+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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6865UK17D5L+T belongs to Maxim's nanopower µP supervisory family, engineered specifically for battery-critical portable electronics needing simultaneous voltage monitoring, manual reset, and long-period watchdog supervision in minimal footprint.
FAQ
What is the exact reset threshold voltage of the MAX6865UK17D5L+T?
The MAX6865UK17D5L+T has a factory-trimmed reset threshold voltage of 1.665V, with ±2.5% tolerance over –40°C to +85°C. This value is defined by the '17' suffix in the part number and is confirmed in Table 2 (Threshold Suffix Guide) of the official datasheet. The device guarantees valid reset assertion down to VCC = 1.1V, supporting reliable operation during deep brownout conditions.
Does the MAX6865UK17D5L+T include a watchdog timer, and what is its timeout?
Yes, the MAX6865UK17D5L+T includes a watchdog timer with a typical timeout of 209 seconds, indicated by the 'L' suffix in the part number. The timer clears on any rising or falling edge at the WDI pin and expires only if WDI remains static beyond this period. It is designed for low-frequency firmware supervision in battery-powered applications like glucose meters where long idle intervals are common.
What type of RESET output does the MAX6865UK17D5L+T provide?
The MAX6865UK17D5L+T provides an active-high push-pull RESET output (Pin 1), as confirmed by its position in the Selector Guide and Pin Description section for MAX6865. This means it actively drives high during reset assertion and low during deassertion - eliminating the need for an external pullup resistor and ensuring clean, fast transitions compatible with standard µP reset inputs.
How is the reset timeout period configured on the MAX6865UK17D5L+T?
The reset timeout period on the MAX6865UK17D5L+T is fixed at 450ms minimum (typical 600ms, max 1200ms), specified by the 'D5' suffix. Unlike MAX6861–MAX6863 variants, it does not use a CT pin for selection - the timeout is factory-set and non-adjustable. This value is validated in Table 4 (Reset Timeout Periods) and applies after VCC rises above threshold or MR deasserts.
Is the MAX6865UK17D5L+T RoHS-compliant and lead-free?
Yes, the MAX6865UK17D5L+T is RoHS-compliant and supplied in lead-free packaging, as indicated by the '+T' suffix per Maxim's Ordering Information. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering per industry standards - confirmed in the "Devices are available in both leaded and lead-free packaging" note on page 14 of the datasheet.
MAX6865UK17D5L+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:
- 300ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6865UK17D5L+T FAQ
1.How can I place an order for MAX6865UK17D5L+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6865UK17D5L+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 MAX6865UK17D5L+T reliable?
The price and inventory of MAX6865UK17D5L+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6865UK17D5L+T is usually 5 days.
3.What payment methods are accepted for MAX6865UK17D5L+T?
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4.How is shipping managed for MAX6865UK17D5L+T?
MAX6865UK17D5L+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6865UK17D5L+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 MAX6865UK17D5L+T?
For technical support, including MAX6865UK17D5L+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6865UK17D5L+T requirements.
6.How does Aetrix verify that MAX6865UK17D5L+T is sourced from the original manufacturer or authorized distributors?
All MAX6865UK17D5L+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 MAX6865UK17D5L+T meets industry standards.
7.What is the process for return or replacement of MAX6865UK17D5L+T?
All MAX6865UK17D5L+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6865UK17D5L+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 MAX6865UK17D5L+T part is unused and in its original packaging.
Return procedure for MAX6865UK17D5L+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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