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Analog Devices Inc./Maxim Integrated MAX6858UK16D3
- Part No.:
- MAX6858UK16D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6858UK16D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,576
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Product details
Overview
MAX6858UK16D3 from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 1.575V reset threshold (suffix '16'), and 150ms minimum reset timeout (suffix 'D3'). It monitors VCC, asserts active-low push-pull RESET on undervoltage or manual reset, and guarantees valid reset output down to VCC = +1.1V. It is used in battery-powered glucose monitors and portable medical devices requiring long-term power integrity.
For engineers reviewing the MAX6858UK16D3 datasheet, MAX6858UK16D3 pinout, MAX6858UK16D3 application, or MAX6858UK16D3 equivalent, this page delivers verified electrical parameters, exact pin functions for I.C./GND/RESET/VCC configuration, timeout behavior under brownout, and validated alternatives for low-power µP reset supervision in space-constrained designs.
Technical Context
The MAX6858UK16D3 implements a precision voltage monitor with ±2.5% reset threshold accuracy over -40°C to +85°C, hysteresis of 0.5% VTH, and immunity to VCC transients ≤40µs at 100mV overdrive. Its internal timer enforces a guaranteed minimum 150ms reset assertion after VCC recovery or MR deassertion.
No watchdog timer or manual reset input is present - the MAX6858 variant excludes both MR and WDI pins, using pins 1 and 2 as internally connected (I.C.) terminals tied to GND for enhanced noise immunity. Reset assertion is solely triggered by VCC falling below 1.575V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typical at +25°C; enables >10-year battery life in coin-cell–powered devices. |
| Reset Threshold | 1.575V ±2.5%; factory-trimmed for precise brownout detection in 1.8V/2.5V systems. |
| Reset Timeout | 150ms minimum (D3 option); ensures µP initialization completes before release from reset. |
| VCC Operating Range | 1.2V to 5.5V; supports operation down to near-threshold voltages in ultra-low-power states. |
| Reset Validity | Guaranteed to VCC = +1.1V; maintains deterministic reset state during deep brownout. |
| Package | 5-pin SOT23; footprint-compatible with industry-standard supervisory ICs for drop-in layout reuse. |
| Temperature Range | -40°C to +85°C; qualified for industrial and portable medical environments. |
Pinout & Package
MAX6858UK16D3 uses a 5-pin SOT23 package with pins 1 and 2 designated as internally connected (I.C.) terminals - both must be connected to GND per datasheet guidance to maximize noise immunity. Pin 3 is GND, pin 4 is active-low push-pull RESET output, and pin 5 is VCC supply input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | I.C. (Internally Connected) | Must connect both to GND; improves noise rejection in high-EMI portable medical systems. |
| 3 | GND | Primary ground reference; all internal circuits referenced to this node. |
| 4 | RESET | Active-low push-pull output; drives µP reset pin directly without external pullup. |
| 5 | VCC | Monitored supply input; bypass with 0.1µF capacitor to GND for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables multi-year operation on CR2032 batteries. |
| No external components | Self-contained reset generation - no RC timing network or pullup resistors required. |
| Transient immunity | Immune to VCC glitches ≤40µs duration at 100mV overdrive, preventing spurious resets. |
| Valid reset at low VCC | RESET remains functional down to VCC = +1.1V, ensuring reliability during deep brownout. |
| SOT23 footprint | 5-pin SOT23 package fits <1.5mm² PCB area - ideal for compact wearable and diagnostic devices. |
Applications
| Glucose Monitors | Patient Monitoring Wearables |
|---|---|
Use Scenario: Continuous subcutaneous glucose sensing with Bluetooth LE transmission powered by single coin cell. IC Role / Device Role / Timing Role: Supervises 1.8V analog front-end and BLE SoC supply; asserts RESET if battery voltage drops below 1.575V. Use Value: Prevents corrupted sensor readings or failed firmware updates during battery depletion. |
Use Scenario: Disposable ECG patch with 6-month shelf life and 7-day runtime. IC Role / Device Role / Timing Role: Monitors 2.5V LDO output powering ADC and MCU; holds system in reset until stable post-power-up. Use Value: Eliminates boot failures due to slow-rising supplies in energy-harvesting–assisted designs. |
| Portable Pulse Oximeters | Handheld Diagnostic Scanners |
Use Scenario: Battery-operated fingertip SpO₂ meter with OLED display and optical sensors. IC Role / Device Role / Timing Role: Provides 150ms minimum reset pulse to ensure complete MCU initialization before sensor sampling begins. Use Value: Guarantees deterministic startup sequence across temperature and aging variations. |
Use Scenario: Ruggedized field scanner for point-of-care ultrasound probe interface. IC Role / Device Role / Timing Role: Resets FPGA-based interface logic when main 3.3V rail sags during high-current LED flash pulses. Use Value: Maintains data coherency between analog acquisition and digital processing blocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33DBVR | 3.3V fixed threshold; 200ms timeout; 1.25µA ICC; SOT23-5 | Higher supply current limits battery lifetime in multi-year devices | Select when 3.3V rail monitoring is required and ultra-low ICC is secondary |
| STM6315RWX6F | 1.63V threshold; 200ms timeout; 400nA ICC; SOT23-5 | Wider threshold tolerance (±3.5%) and no I.C. pins for noise immunity | Choose for cost-sensitive industrial sensors where 1.63V vs. 1.575V threshold is acceptable |
Compared with MAX6858UK16D3, TPS3836K33DBVR consumes ~7× more current and lacks I.C.-grounded noise hardening, while STM6315RWX6F trades 60mV higher threshold and looser accuracy for marginally lower cost - neither offers identical 1.575V/150ms/I.C.-GND combination.
Availability
MAX6858UK16D3 is available at Aetrix Electronics and suitable for portable medical diagnostics, battery-powered patient monitors, and low-power handheld scanners requiring stable component supply across extended production lifecycles.
Supply support for MAX6858UK16D3 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 systems.
The MAX685x family delivers nanopower supervisory circuits optimized for battery longevity and robust reset behavior in space-constrained portable medical and consumer electronics.
FAQ
What is the exact reset threshold voltage of MAX6858UK16D3?
The MAX6858UK16D3 has a factory-trimmed reset threshold of +1.575V, 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 '16' explicitly maps to 1.575V. The device guarantees reset assertion when VCC falls below this level and maintains reset until VCC exceeds 1.575V plus hysteresis (0.5% of VTH).
Does MAX6858UK16D3 include a manual reset input or watchdog timer?
No, MAX6858UK16D3 does not include MR or WDI functionality. As shown in the Selector Guide and Pin Configurations, MAX6858 uses pins 1 and 2 as internally connected (I.C.) terminals - not MR or WDI - and provides only VCC monitoring with fixed 150ms reset timeout. This distinguishes it from MAX6854/MAX6864 variants that include manual reset or watchdog features.
What is the purpose of the I.C. pins on MAX6858UK16D3?
Pins 1 and 2 of MAX6858UK16D3 are labeled I.C. (Internally Connected) and must both be connected to GND per the datasheet's Pin Configurations and Applications Information sections. This dual-GND connection enhances noise immunity in electrically noisy portable medical environments, reducing susceptibility to false resets caused by EMI or supply transients.
Can MAX6858UK16D3 drive a microcontroller reset pin directly?
Yes, MAX6858UK16D3 features an active-low push-pull RESET output (pin 4) that can directly drive standard CMOS µP reset inputs without external pullup resistors. Its VOL is ≤0.3V at ISINK = 1.2mA (VCC ≥ 2.38V), ensuring solid logic-low assertion, and VOH reaches 0.8 × VCC when deasserted - fully compatible with 1.8V/2.5V/3.3V logic families.
What is the minimum VCC voltage at which MAX6858UK16D3 guarantees valid reset operation?
MAX6858UK16D3 guarantees valid RESET output down to VCC = +1.1V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below this voltage, reset behavior is not characterized - but above 1.1V, the device ensures deterministic assertion/deassertion timing and output drive strength, critical for reliable brownout recovery in low-voltage battery systems.
MAX6858UK16D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6858UK16D3 FAQ
1.How can I place an order for MAX6858UK16D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6858UK16D3 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 MAX6858UK16D3 reliable?
The price and inventory of MAX6858UK16D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6858UK16D3 is usually 5 days.
3.What payment methods are accepted for MAX6858UK16D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6858UK16D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6858UK16D3?
MAX6858UK16D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6858UK16D3 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 MAX6858UK16D3?
For technical support, including MAX6858UK16D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6858UK16D3 requirements.
6.How does Aetrix verify that MAX6858UK16D3 is sourced from the original manufacturer or authorized distributors?
All MAX6858UK16D3 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 MAX6858UK16D3 meets industry standards.
7.What is the process for return or replacement of MAX6858UK16D3?
All MAX6858UK16D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6858UK16D3, 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 MAX6858UK16D3 part is unused and in its original packaging.
Return procedure for MAX6858UK16D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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