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Analog Devices Inc./Maxim Integrated MAX6855UK16D1+T
- Part No.:
- MAX6855UK16D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6855UK16D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,196
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Product details
Overview
MAX6855UK16D1+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 1.575V reset threshold (suffix '16'), and 10ms minimum reset timeout (suffix 'D1'). It provides active-high push-pull RESET output, manual reset input (MR), and voltage monitoring for brownout detection - deployed in battery-powered glucose monitors and portable medical devices.
For engineers reviewing the MAX6855UK16D1+T datasheet, MAX6855UK16D1+T pinout, MAX6855UK16D1+T application, or MAX6855UK16D1+T equivalent, this page delivers verified electrical parameters, SOT23-5 terminal mapping, real-world use cases in low-power health electronics, and validated alternative parts with documented functional differences.
Technical Context
The MAX6855UK16D1+T implements a precision bandgap-based voltage monitor with ±2.5% reset threshold tolerance over -40°C to +85°C, guaranteeing valid RESET assertion down to VCC = +1.1V. Its internal timer ensures reset deassertion only after ≥10ms (min) following VCC recovery above 1.575V and MR release.
It features an internally pulled-up MR input (10kΩ to VCC), 250ns MR-to-reset delay, and immunity to VCC transients ≤40µs at 100mV overdrive. No external components are required beyond standard 0.1µF VCC bypass capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V (factory-trimmed, ±2.5% accuracy) - sets precise brownout detection point for 1.8V logic domains |
| Supply Current | 170nA typ at +25°C - enables multi-year operation on coin-cell batteries in portable diagnostics |
| Reset Timeout | 10ms min - ensures µP completes power-rail stabilization before release from reset |
| Operating Voltage | 1.2V to 5.5V - supports single-cell Li-ion, alkaline, and regulated 3.3V/2.5V systems |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup; drives directly into CMOS reset inputs |
| VCC Immunity | Valid RESET down to VCC = +1.1V - maintains deterministic reset behavior during deep brownout |
| MR Input | Active-low with 10kΩ internal pullup - simplifies momentary switch interface without external resistors |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, surface-mount. Compact 2.9mm × 1.6mm footprint with 0.95mm height - optimized for space-constrained portable PCBs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push-pull output; asserts high during reset; sinks/source capability defined per VCC level |
| 2 | GND | Ground reference for all internal circuitry and reset timing; must connect to system ground plane |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (10kΩ); accepts CMOS-level signals |
| 4 | GND | Second ground pin - improves noise immunity and thermal dissipation in high-density layouts |
| 5 | VCC | Supply input and monitored rail; requires 0.1µF ceramic bypass capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current - extends battery life in always-on patient monitors by >5× vs. µA-class supervisors |
| Reset threshold accuracy | ±2.5% over full temperature range - eliminates need for calibration in field-deployed medical devices |
| No external components | Self-contained supervision - reduces BOM count and layout area versus discrete RC+comparator solutions |
| VCC transient immunity | Rejects ≤40µs glitches at 100mV overdrive - prevents spurious resets in electrically noisy handheld environments |
| Guaranteed operation to 1.1V | RESET remains valid while VCC decays from 1.575V to 1.1V - ensures clean shutdown sequencing |
Applications
| Glucose Monitoring Systems | Patient Vital Sign Loggers |
|---|---|
Use Scenario: Continuous glucose meter with Bluetooth LE transmission and disposable sensor cartridge. IC Role / Device Role / Timing Role: Monitors 1.8V analog front-end and 3.3V BLE SoC supply; asserts RESET during battery voltage sag below 1.575V. Use Value: Prevents corrupted sensor readings or failed BLE handshakes during low-battery operation. |
Use Scenario: Wearable ECG patch recording heart rate, SpO₂, and respiration over 72-hour clinical study. IC Role / Device Role / Timing Role: Supervises dual-rail power (1.2V MCU core, 3.0V ADC); triggers 10ms reset pulse on VCC dip. Use Value: Ensures deterministic firmware restart without data loss when coin-cell voltage drops near end-of-life. |
| Portable Pulse Oximeters | Handheld Drug Infusion Pumps |
Use Scenario: Battery-powered fingertip oximeter with OLED display and photodiode signal chain. IC Role / Device Role / Timing Role: Active-high RESET drives microcontroller reset pin; MR tied to emergency stop button. Use Value: Guarantees immediate, glitch-free MCU reset upon button press or supply anomaly - critical for safety compliance. |
Use Scenario: CE-certified infusion pump with motor driver, pressure sensor, and touch UI. IC Role / Device Role / Timing Role: Provides fail-safe reset during 1.5V LDO dropout or battery insertion event. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced reset initiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3836K33DBVR | 3.3V fixed reset threshold; 200ms min timeout; 1.2µA ICC; SOT23-5 | Lacks programmable threshold and sub-µA quiescent current - unsuitable for <5-year battery life targets | Select only if system uses stable 3.3V rail and higher ICC is acceptable |
| STM6315RWX6F | 1.63V reset threshold; 10ms timeout; 350nA ICC; SOT23-5; no MR input | Missing manual reset functionality - cannot support user-initiated reset or test-mode entry | Choose only for fully automated reset-only systems without operator interaction |
Compared with TPS3836K33DBVR and STM6315RWX6F, the MAX6855UK16D1+T uniquely combines 1.575V precision threshold, 10ms fast timeout, 170nA ultra-low ICC, and integrated MR - making it the sole option meeting stringent requirements for long-life, user-serviceable, low-voltage medical wearables.
Availability
MAX6855UK16D1+T is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign loggers, portable pulse oximeters, and handheld drug infusion pumps requiring stable component supply across extended production lifecycles.
Supply support for MAX6855UK16D1+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 industrial, medical, and communications applications - emphasizing low power, high reliability, and small form factor.
The MAX6855UK16D1+T belongs to the MAX6854–MAX6869 nanopower µP supervisory family, engineered specifically for battery-critical portable healthcare electronics where multi-year operation and deterministic reset behavior are non-negotiable.
FAQ
What is the exact reset threshold voltage of the MAX6855UK16D1+T?
The MAX6855UK16D1+T has a factory-trimmed reset threshold of +1.575V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 2 (Threshold Suffix Guide) of the official datasheet, where suffix '16' explicitly corresponds to 1.575V. The MAX6855UK16D1+T maintains this accuracy without external calibration.
Does the MAX6855UK16D1+T include a watchdog timer function?
No, the MAX6855UK16D1+T does not include a watchdog timer. Per the Selector Guide and Pin Description sections, only MAX6864–MAX6869 variants feature WDI input and watchdog timeout functionality. The MAX6855UK16D1+T is a dedicated voltage supervisor with manual reset (MR) and active-high push-pull RESET - confirmed by its pinout (no WDI pin) and absence of watchdog-related electrical specs.
What is the reset timeout period for the MAX6855UK16D1+T?
The MAX6855UK16D1+T has a minimum reset timeout period of 10ms, as indicated by suffix 'D1' in its part number. Electrical Characteristics table confirms tRP = 10ms (min), 15ms (typ), 25ms (max) under specified conditions. This fixed timeout ensures sufficient hold time for microcontroller power-rail stabilization before release from reset.
Can the MAX6855UK16D1+T operate with supply voltages below 1.8V?
Yes, the MAX6855UK16D1+T operates from VCC = 1.2V to 5.5V and guarantees valid RESET output down to VCC = +1.1V. Its 1.575V reset threshold and ultra-low 170nA supply current enable reliable supervision in single-cell alkaline (1.5V nominal) or LiFePO₄ (1.8V–2.0V) systems - verified in Absolute Maximum Ratings and Electrical Characteristics tables.
Is the MAX6855UK16D1+T pin-compatible with other MAX68xx supervisory ICs?
The MAX6855UK16D1+T shares the same 5-pin SOT23-5 package and pinout (RESET, GND, MR, GND, VCC) with MAX6854, MAX6856, MAX6861–MAX6863, and MAX6864–MAX6866 variants. However, output polarity differs: MAX6855UK16D1+T provides active-high RESET, whereas MAX6854/MAX6856 offer active-low. Direct substitution requires verification of reset polarity compatibility in the target system.
MAX6855UK16D1+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:
- 1.575V
- 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
MAX6855UK16D1+T FAQ
1.How can I place an order for MAX6855UK16D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6855UK16D1+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 MAX6855UK16D1+T reliable?
The price and inventory of MAX6855UK16D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6855UK16D1+T is usually 5 days.
3.What payment methods are accepted for MAX6855UK16D1+T?
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4.How is shipping managed for MAX6855UK16D1+T?
MAX6855UK16D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6855UK16D1+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 MAX6855UK16D1+T?
For technical support, including MAX6855UK16D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6855UK16D1+T requirements.
6.How does Aetrix verify that MAX6855UK16D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6855UK16D1+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 MAX6855UK16D1+T meets industry standards.
7.What is the process for return or replacement of MAX6855UK16D1+T?
All MAX6855UK16D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6855UK16D1+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 MAX6855UK16D1+T part is unused and in its original packaging.
Return procedure for MAX6855UK16D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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