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Analog Devices Inc./Maxim Integrated MAX6869UK41D6L+T
- Part No.:
- MAX6869UK41D6L+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6869UK41D6L+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,753
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Product details
Overview
MAX6869UK41D6L+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 4.100V 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 µP startup and fault recovery.
For engineers reviewing the MAX6869UK41D6L+T datasheet, MAX6869UK41D6L+T pinout, MAX6869UK41D6L+T application, or MAX6869UK41D6L+T equivalent, this page delivers verified electrical parameters, functional pin roles, real-world use cases, and validated alternative options for low-power system supervision design.
Technical Context
The MAX6869UK41D6L+T integrates voltage monitoring, watchdog timer, and manual reset functions in a single BiCMOS IC. Its reset assertion is triggered by VCC falling below 4.100V, MR pull-down, or WDI inactivity exceeding 209s (typ), with guaranteed reset validity down to VCC = +1.1V.
It uses an internal 10kΩ MR pullup and supports open-drain or push-pull active-low RESET output. The watchdog timer clears on any WDI edge (min pulse width 150ns) and remains disabled during reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typ at VCC = 1.8V - enables multi-year operation on coin-cell batteries |
| Reset Threshold Voltage | 4.100V ±2.5% - precisely monitors 4.2V Li-ion battery discharge or 3.3V/5V rail brownout |
| Reset Timeout Period | 600–1200ms (D6 option) - ensures µP completes power-up initialization before release |
| Watchdog Timeout | 209s typ (L suffix) - suitable for long-cycle firmware tasks without excessive polling overhead |
| VCC Operating Range | 1.2V to 5.5V - supports wide-input battery and regulated supply systems |
| Reset Output Type | Active-low open-drain - allows level-shifting to µP logic rails up to 5.5V |
| MR Input Logic | Active-low with 10kΩ internal pullup - simplifies switch interface; no external resistor needed |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | WDI | Watchdog input - rising/falling edge resets internal timer; 150ns min pulse width supported |
| 2 | GND | Ground reference - must connect to system common ground plane for noise immunity |
| 3 | MR | Manual reset input - active-low, internally pulled up to VCC (10kΩ); asserts reset when pulled ≤0.3×VCC |
| 4 | RESET | Active-low open-drain reset output - requires external pullup; sinks 50µA at VOL ≤0.3V (VCC ≥1.1V) |
| 5 | VCC | Supply voltage input - monitored rail; bypass with 0.1µF ceramic capacitor to GND for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current - extends battery life in glucose monitors and wearables beyond 5 years |
| Guaranteed reset validity | Valid reset assertion down to VCC = +1.1V - ensures µP reset integrity during deep brownout |
| Watchdog immunity | Clears on any WDI edge (150ns min) - prevents false timeouts from noise or slow edges |
| No external components | Self-contained supervision - eliminates discrete RC networks, reducing BOM count and layout area |
| Transient immunity | Immune to VCC glitches ≤40µs at 100mV overdrive - avoids spurious resets in noisy automotive/industrial environments |
Applications
| Glucose Monitors | Patient Monitoring Devices |
|---|---|
Use Scenario: Continuous blood glucose sensing with Bluetooth LE transmission and low-power sleep cycles. IC Role / Device Role / Timing Role: Supervises 3.3V rail and triggers full µP reset if firmware hangs during sensor calibration or radio handshaking. Use Value: Prevents missed hypo/hyperglycemia alerts by enforcing deterministic recovery from software lockup within 209s. |
Use Scenario: Portable ECG recorder with rechargeable Li-ion battery and multi-day standby. IC Role / Device Role / Timing Role: Monitors battery voltage decay and asserts reset before VCC drops below µP operational threshold (1.8V). Use Value: Ensures clean boot sequence after battery replacement or deep discharge, avoiding corrupted waveform storage. |
| Smart Wearables | Industrial Handheld Terminals |
Use Scenario: Fitness tracker with motion-sensing SoC, ambient light sensor, and OLED display. IC Role / Device Role / Timing Role: Provides manual reset via button press and watchdog supervision of sensor fusion firmware. Use Value: Enables user-initiated recovery without battery removal; 1200ms reset timeout accommodates OLED initialization delay. |
Use Scenario: Rugged barcode scanner used in warehouse logistics with frequent drop-induced MCU crashes. IC Role / Device Role / Timing Role: Detects VCC sag during motor actuation and resets µP if WDI signal stalls during decode loop. Use Value: Reduces field failure rate by auto-recovering from mechanical shock-induced firmware faults within 209s. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6867UK41D6S+T | Same 4.100V threshold and D6 timeout, but 3.3s watchdog (S suffix) instead of 209s (L) | Better suited for fast-loop firmware requiring frequent WDI toggling; less tolerant of long idle periods | Select when system watchdog interval must be <10s and reset timing budget is tight |
| TPS3839G33DBVR | 3.3V fixed threshold, 200ms reset timeout, no watchdog, 350nA ICC - higher current, no WDI function | Lacks watchdog capability; only suitable for basic voltage monitoring where code execution supervision is handled externally | Choose only if watchdog is unnecessary and 3.3V rail supervision suffices with lower cost target |
Compared with MAX6869UK41D6L+T, MAX6867UK41D6S+T offers faster watchdog response but sacrifices long-cycle tolerance, while TPS3839G33DBVR reduces functionality and increases supply current-neither is pin-compatible, and both require PCB redesign for integration.
Availability
MAX6869UK41D6L+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitors, smart wearables, and industrial handheld terminals requiring stable component supply across extended production lifecycles.
Supply support for MAX6869UK41D6L+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 MAX6854–MAX6869 family delivers nanopower supervisory circuits optimized for battery-critical portable and medical devices, emphasizing ultra-low ICC, wide VCC range, and integrated watchdog reliability.
FAQ
What is the exact reset threshold voltage of MAX6869UK41D6L+T?
The MAX6869UK41D6L+T has a factory-trimmed reset threshold of 4.100V with ±2.5% tolerance over temperature (-40°C to +85°C), corresponding to the "41" suffix in its part number per Maxim's Threshold Suffix Guide. This value is guaranteed across the full operating range and ensures accurate detection of 4.2V Li-ion battery discharge endpoints or 3.3V/5V rail brownouts.
Does MAX6869UK41D6L+T support active-high reset output?
No, MAX6869UK41D6L+T provides only active-low reset output. Per the Selector Guide and Pin Description, MAX6869 is configured as open-drain active-low RESET (pin 4). Active-high variants exist in the family (e.g., MAX6868), but MAX6869UK41D6L+T does not support push-pull active-high output.
What is the watchdog timeout behavior of MAX6869UK41D6L+T?
MAX6869UK41D6L+T features a watchdog timeout period of 209s typical (L suffix), with min/max of 95s/487s. The timer clears on any WDI edge (rising or falling) and remains suspended while RESET is asserted. It resumes counting immediately upon RESET deassertion, ensuring deterministic recovery from firmware hangs without requiring µP intervention.
Can MAX6869UK41D6L+T operate below 1.2V supply?
No - MAX6869UK41D6L+T specifies a minimum VCC of 1.2V for guaranteed operation per Absolute Maximum Ratings and Electrical Characteristics tables. While reset output remains valid down to VCC = +1.1V, functional operation (including watchdog timing and MR detection) is only specified from 1.2V to 5.5V.
Is MAX6869UK41D6L+T pin-compatible with other MAX68xx devices?
MAX6869UK41D6L+T shares the same 5-pin SOT23-5 package and pinout (WDI, GND, MR, RESET, VCC) with MAX6867/MAX6868, but is not pin-compatible with MAX6864–MAX6866 (which place RESET on pin 1) or MAX6861–MAX6863 (which use CT on pin 1). Direct substitution requires matching pin function alignment and verifying WDI/CT/RESET placement.
MAX6869UK41D6L+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.1V
- Output:
- Open Drain or Open Collector
- 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
MAX6869UK41D6L+T FAQ
1.How can I place an order for MAX6869UK41D6L+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6869UK41D6L+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 MAX6869UK41D6L+T reliable?
The price and inventory of MAX6869UK41D6L+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6869UK41D6L+T is usually 5 days.
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Once your MAX6869UK41D6L+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 MAX6869UK41D6L+T?
For technical support, including MAX6869UK41D6L+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6869UK41D6L+T requirements.
6.How does Aetrix verify that MAX6869UK41D6L+T is sourced from the original manufacturer or authorized distributors?
All MAX6869UK41D6L+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 MAX6869UK41D6L+T meets industry standards.
7.What is the process for return or replacement of MAX6869UK41D6L+T?
All MAX6869UK41D6L+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6869UK41D6L+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 MAX6869UK41D6L+T part is unused and in its original packaging.
Return procedure for MAX6869UK41D6L+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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