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Analog Devices Inc./Maxim Integrated MAX6855UK23D6+T
- Part No.:
- MAX6855UK23D6+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6855UK23D6+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,723
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Product details
Overview
The MAX6855UK23D6+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 2.313V reset threshold (suffix "23"), and a 600ms minimum reset timeout period (suffix "D6"). It provides active-high push-pull RESET output, manual reset input (MR), and operates across –40°C to +85°C for reliable power-up/brownout monitoring in battery-powered medical and portable electronics.
For engineers reviewing the MAX6855UK23D6+T datasheet, MAX6855UK23D6+T pinout, MAX6855UK23D6+T application, or MAX6855UK23D6+T equivalent, this page delivers verified electrical parameters, functional pin definitions, real-world use cases in glucose monitors and patient monitors, and two validated alternative parts with documented technical and application differences.
Technical Context
This device implements a precision voltage monitor with hysteresis (±2.5% VTH), guaranteed reset validity down to VCC = +1.1V, and immunity to short VCC transients (<40µs at 100mV overdrive). Its internal 10kΩ MR pullup and glitch rejection (200ns) enable robust manual reset handling without external components.
The MAX6855UK23D6+T belongs to the MAX6854–MAX6869 family and excludes watchdog timer (WDI) and CT select functionality - confirmed by its part number structure (no "S"/"L" or "CT"-related suffixes) and Selector Guide entry. It delivers push-pull active-high RESET with VOH ≥ 0.8×VCC (ISOURCE = 500µA) and VOL ≤ 0.3V (ISINK = 1.2mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typ at VCC = 1.8V; enables multi-year battery life in always-on medical sensors. |
| Reset Threshold | 2.313V (±2.5%); factory-trimmed for precise brownout detection on 2.5V or 3.3V rails. |
| Reset Timeout | 600ms min (D6 option); ensures full µP initialization before release from reset state. |
| RESET Output Type | Push-pull active-high; drives high to VCC without external pullup, simplifying interface to µP reset inputs. |
| VCC Operating Range | 1.2V to 5.5V; supports wide-input battery systems including single-cell Li-ion and coin-cell applications. |
| Reset Validity Limit | Guaranteed to VCC = +1.1V; maintains valid logic level during deep brownout, preventing undefined µP behavior. |
| MR Input Logic | Active-low with 10kΩ internal pullup; accepts CMOS-level signals and requires no external biasing. |
Pinout & Package
Package: 5-pin SOT23-5, lead-free (RoHS-compliant), surface-mount, footprint compatible with industry-standard 5-pin SOT23 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-high) | Push-pull output asserted high during reset; sinks current when deasserted, eliminates need for external pullup. |
| 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 (10kΩ); driven low to force reset independent of VCC. |
| 4 | GND | Second ground terminal; electrically tied to Pin 2 internally; improves thermal and EMI performance in high-noise environments. |
| 5 | VCC | Primary supply and monitored rail; powers device and triggers reset when falling below 2.313V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current extends battery life in portable medical devices beyond 5 years. |
| No external components | Integrated MR pullup, precision voltage reference, and reset timer eliminate BOM cost and layout area. |
| VCC transient immunity | Immune to <40µs VCC glitches at 100mV overdrive, preventing spurious resets in noisy power environments. |
| Guaranteed reset at low VCC | Valid RESET assertion down to VCC = +1.1V ensures deterministic µP behavior during deep brownout. |
| SOT23-5 footprint | Industry-standard 5-pin SOT23 package enables drop-in replacement and compatibility with existing pick-and-place tooling. |
Applications
| Glucose Monitors | Patient Monitors |
|---|---|
Use Scenario: Continuous glucose sensing with Bluetooth LE transmission powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervises 3.3V rail during cold-start and battery depletion; asserts active-high RESET to ARM Cortex-M0 until stable VCC and firmware initialization complete. Use Value: 170nA ICC preserves >90% battery capacity over 2-year shelf life; 600ms timeout accommodates slow analog front-end settling. |
Use Scenario: Portable ECG unit operating from dual AA alkaline cells with variable discharge curve. IC Role / Device Role / Timing Role: Monitors 2.5V LDO output feeding ADC and display controller; triggers reset if VCC drops below 2.313V during motorized probe actuation. Use Value: ±2.5% VTH tolerance ensures consistent trip point across temperature; 10kΩ MR pullup allows direct switch connection without debounce circuitry. |
| MP3 Players | Cell Phones (Feature Phones) |
Use Scenario: Flash-based audio player with USB charging and low-power sleep mode. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for DSP core; MR pin enables hardware reset via side-button press. Use Value: Push-pull active-high RESET directly interfaces with DSP's active-high reset pin, eliminating level-shifting components. |
Use Scenario: Legacy GSM handset with 2.8V PMIC rail powering baseband processor. IC Role / Device Role / Timing Role: Detects VCC sag during RF transmit bursts; holds processor in reset until rail recovers above 2.313V and stabilizes for 600ms. Use Value: Immunity to 40µs transients prevents false resets during high-current RF switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3837K23DBVR | 2.32V reset threshold, 600ms timeout, push-pull active-high RESET, but 1.5µA ICC (≈9× higher than MAX6855UK23D6+T). | Higher supply current limits use in multi-year coin-cell applications; otherwise pin-compatible in SOT23-5. | Select when TI supply chain preference or qualification requirements override ultra-low-power needs. |
| ADM6805-23ARTZ-RL | 2.32V threshold, 600ms timeout, open-drain active-low RESET (not push-pull active-high), 1.2µA ICC. | Requires external pullup and level translation for active-high µP reset inputs; unsuitable where board space or BOM count is constrained. | Choose only if open-drain architecture aligns with existing system reset bus topology. |
Compared with TPS3837K23DBVR and ADM6805-23ARTZ-RL, the MAX6855UK23D6+T uniquely delivers sub-200nA ICC with push-pull active-high RESET in the same SOT23-5 footprint - critical for extending battery life in Class II medical wearables without redesigning reset interface logic.
Availability
MAX6855UK23D6+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitors, and MP3 players requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for MAX6855UK23D6+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 was engineered specifically for ultra-low-power microprocessor supervision in battery-critical portable medical and handheld devices, prioritizing nanoscale ICC, guaranteed low-VCC operation, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the MAX6855UK23D6+T?
The MAX6855UK23D6+T has a factory-trimmed reset threshold of 2.313V, with ±2.5% tolerance over temperature (–40°C to +85°C). This value is defined by the "23" suffix per Table 2 (Threshold Suffix Guide) and is confirmed in the Electrical Characteristics table under VTH parameter. The MAX6855UK23D6+T maintains this threshold stability across its full operating range without external calibration.
Does the MAX6855UK23D6+T include a watchdog timer function?
No, the MAX6855UK23D6+T does not include a watchdog timer. Its part number lacks a "S" or "L" suffix (per Ordering Information), and the Selector Guide explicitly lists WDI as "-" for MAX6855. The device provides only voltage monitoring and manual reset functions - confirmed by its functional diagram (Figure 1) and Pin Description table, which omits WDI.
What is the function of Pin 4 on the MAX6855UK23D6+T?
Pin 4 on the MAX6855UK23D6+T is GND - a second ground terminal electrically tied to Pin 2. As shown in the Pin Configurations diagram (page 15) and MAX6854/MAX6855/MAX6856 Pin Description table, both Pins 2 and 4 connect to internal ground. This dual-GND configuration improves thermal dissipation and reduces ground bounce in noise-sensitive applications like patient monitors.
Can the MAX6855UK23D6+T operate from a 1.2V supply?
Yes, the MAX6855UK23D6+T operates from VCC = 1.2V to 5.5V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. At 1.2V, it guarantees reset assertion while VCC remains below 2.313V and maintains valid RESET output down to VCC = +1.1V - enabling use in emerging ultra-low-voltage energy-harvesting systems where supply rails dip near 1.2V.
Is the MAX6855UK23D6+T pin-compatible with the TPS3837 series?
Yes, the MAX6855UK23D6+T is pin-compatible with the TPS3837K23DBVR per the datasheet's Features section, which states "Pin Compatible to the TPS3837/TPS3838". Both use identical 5-pin SOT23-5 footprints, share matching pin assignments (VCC, GND, MR, GND, RESET), and deliver push-pull active-high RESET - enabling direct substitution where ultra-low ICC is not the primary constraint.
MAX6855UK23D6+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:
- 2.313V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6855UK23D6+T FAQ
1.How can I place an order for MAX6855UK23D6+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6855UK23D6+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 MAX6855UK23D6+T reliable?
The price and inventory of MAX6855UK23D6+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6855UK23D6+T is usually 5 days.
3.What payment methods are accepted for MAX6855UK23D6+T?
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4.How is shipping managed for MAX6855UK23D6+T?
MAX6855UK23D6+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6855UK23D6+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 MAX6855UK23D6+T?
For technical support, including MAX6855UK23D6+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6855UK23D6+T requirements.
6.How does Aetrix verify that MAX6855UK23D6+T is sourced from the original manufacturer or authorized distributors?
All MAX6855UK23D6+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 MAX6855UK23D6+T meets industry standards.
7.What is the process for return or replacement of MAX6855UK23D6+T?
All MAX6855UK23D6+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6855UK23D6+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 MAX6855UK23D6+T part is unused and in its original packaging.
Return procedure for MAX6855UK23D6+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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