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Analog Devices Inc./Maxim Integrated MAX6855UK16D6+T
- Part No.:
- MAX6855UK16D6+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6855UK16D6+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,475
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Product details
Overview
The MAX6855UK16D6+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring ultra-low 170nA typical supply current, factory-trimmed 1.575V reset threshold (suffix "16"), and 600ms–1200ms minimum reset timeout (suffix "D6"). It provides active-high push-pull RESET output, manual reset input (MR), and operates across –40°C to +85°C for battery-powered medical and portable electronics.
For engineers reviewing the MAX6855UK16D6+T datasheet, MAX6855UK16D6+T pinout, MAX6855UK16D6+T application, or MAX6855UK16D6+T equivalent, key selection criteria include its guaranteed reset validity down to VCC = +1.1V, immunity to short VCC transients, no external components requirement, and compatibility with low-voltage µP systems requiring deterministic power-on reset behavior.
Technical Context
This device integrates voltage monitoring, manual reset assertion, and reset timing control in a single BiCMOS IC. Its internal 10kΩ MR pullup eliminates external biasing, and the push-pull active-high RESET output drives directly into µP reset inputs without pullup resistors. The reset timeout is fixed at 600ms (min), with hysteresis of ±2.5% of VTH and guaranteed operation over full industrial temperature range.
The MAX6855UK16D6+T lacks watchdog timer and CT select functionality - confirmed by Selector Guide and Pin Description tables - distinguishing it from MAX686x variants. Its functional scope is strictly VCC monitoring + MR-initiated reset + fixed-tRP assertion, with no WDI or timeout configuration pins present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 170nA typical at +25°C - enables multi-year battery life in glucose monitors and pagers. |
| Reset Threshold Voltage | 1.575V (factory-trimmed, ±2.5%) - matches 1.6V–1.8V logic supply rails and low-power µP core voltages. |
| Reset Timeout Period | 600ms minimum - ensures reliable µP initialization after brownout recovery or cold start. |
| Operating Voltage Range | 1.2V to 5.5V - supports single-cell Li-ion, NiMH, and regulated 3.3V/5V systems. |
| Reset Validity Limit | Guaranteed to VCC = +1.1V - maintains valid RESET signal during deep brownout conditions. |
| MR Input Logic | Active-low with 10kΩ internal pullup - simplifies manual reset switch interface; no external resistor needed. |
| Output Type | Push-pull active-high RESET - drives µP reset pin directly; no external pullup required. |
Pinout & Package
Package: 5-pin SOT23-5, lead-free, 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; referenced to VCC. |
| 2 | GND | Ground reference for all internal circuitry; must connect to system ground plane. |
| 3 | MR (active-low) | Manual reset input; internally pulled up to VCC; asserts reset when pulled ≤0.3×VCC. |
| 4 | GND | Second ground terminal - electrically tied to Pin 2 internally; improves noise immunity in noisy environments. |
| 5 | VCC | Supply voltage input monitored for reset generation; bypass with 0.1µF capacitor to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 170nA typical supply current enables >10-year battery life in always-on medical sensors. |
| No external components | Internal MR pullup and fixed reset timing eliminate BOM parts and layout area. |
| VCC transient immunity | Immune to ≤40µs VCC glitches at 100mV overdrive - prevents spurious resets in noisy power rails. |
| Guaranteed reset at low VCC | Valid RESET output down to VCC = +1.1V - ensures deterministic reset even during severe brownout. |
| SOT23-5 footprint | Industry-standard 5-pin SOT23 package enables drop-in replacement and automated assembly. |
Applications
| Glucose Monitors | Patient Monitors |
|---|---|
|
Use Scenario: Continuous glucose sensing in wearable patch pumps with coin-cell battery. IC Role / Device Role / Timing Role: Supervises 1.5V analog front-end and 1.8V MCU power rail; asserts active-high RESET until stable. Use Value: 170nA ICC extends battery life beyond 12 months; 1.575V threshold precisely matches sensor LDO output. |
Use Scenario: Portable ECG and SpO₂ units powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: Monitors main 3.3V system rail and triggers controlled µP restart on undervoltage. Use Value: 600ms reset timeout ensures complete ADC calibration and memory initialization before firmware execution. |
| MP3 Players | Cell Phones (Feature Phones) |
|
Use Scenario: Flash-based audio players with dual-voltage (1.2V core / 3.3V I/O) architecture. IC Role / Device Role / Timing Role: Provides synchronized reset to baseband and application processors during power-up sequencing. Use Value: Push-pull active-high RESET eliminates need for level-shifting; reduces component count vs. open-drain solutions. |
Use Scenario: Low-cost GSM handsets with tight PCB space and strict power budget constraints. IC Role / Device Role / Timing Role: Supervises RF transceiver supply and baseband ASIC; manual reset via side-button interface. Use Value: Internal 10kΩ MR pullup removes discrete resistor; SOT23-5 footprint saves >1.2mm² board area vs. SOIC-8 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3837K33DBVR | 3.3V fixed threshold; 200ms reset timeout; open-drain active-low output; 1.2µA ICC. | Requires external pullup; higher ICC limits use in multi-year battery devices. | Select when 3.3V rail supervision is primary need and board already uses open-drain reset topology. |
| MAX6316LUK31D3+T | 3.075V threshold; 150ms timeout; push-pull active-low; 1.1µA ICC; same SOT23-5 package. | Active-low output incompatible with µPs requiring active-high reset; higher ICC increases leakage. | Choose only if legacy design mandates active-low signaling and 3.1V threshold alignment is critical. |
Compared with TPS3837K33DBVR and MAX6316LUK31D3+T, the MAX6855UK16D6+T delivers 7× lower supply current, precise 1.575V threshold for sub-1.8V systems, and active-high push-pull drive - making it uniquely suited for ultra-low-power medical wearables where reset polarity, voltage accuracy, and battery longevity are non-negotiable.
Availability
MAX6855UK16D6+T is available at Aetrix Electronics and suitable for glucose monitors, patient monitors, MP3 players, and feature phones requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6855UK16D6+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 industrial, medical, and communications applications.
The MAX685x family targets ultra-low-power microprocessor supervision in battery-critical portable equipment, emphasizing nanoscale ICC, guaranteed low-VCC reset validity, and minimal external component requirements.
FAQ
What is the exact reset threshold voltage of the MAX6855UK16D6+T?
The MAX6855UK16D6+T has a factory-trimmed reset threshold voltage of +1.575V, with ±2.5% tolerance over temperature. This value is defined by the "16" suffix in the part number per Table 2 (Threshold Suffix Guide) and is guaranteed across –40°C to +85°C. The MAX6855UK16D6+T asserts reset when VCC falls below this threshold and holds reset for the full 600ms timeout after VCC rises above it.
Does the MAX6855UK16D6+T include a watchdog timer function?
No, the MAX6855UK16D6+T does not include a watchdog timer. Per the Selector Guide and Pin Configuration diagrams, only MAX6864–MAX6869 variants feature WDI input and watchdog timeout functionality. The MAX6855UK16D6+T is a dedicated voltage monitor + manual reset IC with no WDI pin or watchdog circuitry - confirmed by absence of WDI in its pinout and electrical characteristics tables.
What is the reset output type and drive capability of the MAX6855UK16D6+T?
The MAX6855UK16D6+T features a push-pull active-high RESET output. When asserted, RESET is driven low (VOL ≤ 0.3V at ISINK = 1.2mA); when deasserted, it is driven high to VCC (VOH ≥ 0.8×VCC at ISOURCE = 500µA). This eliminates need for external pullup resistors and ensures direct compatibility with µPs requiring active-high reset signals - a key distinction from open-drain or active-low variants in the MAX685x family.
Can the MAX6855UK16D6+T operate reliably below 1.8V supply?
Yes, the MAX6855UK16D6+T operates from VCC = 1.2V to 5.5V and guarantees valid RESET output down to VCC = +1.1V. Its 1.575V threshold and 170nA typical ICC make it suitable for single-cell alkaline, NiMH, or low-dropout Li-ion systems where supply voltage may dip near 1.2V during discharge. Electrical Characteristics table confirms functionality at 1.2V min, and Typical Operating Characteristics show stable ICC down to 1.2V.
Is the MAX6855UK16D6+T pin-compatible with other SOT23-5 supervisory ICs?
The MAX6855UK16D6+T uses a standard 5-pin SOT23-5 footprint but is not universally pin-compatible. Its Pin 1 = RESET (active-high), Pin 3 = MR, Pins 2 & 4 = GND, Pin 5 = VCC - matching only MAX6854/MAX6855/MAX6856 variants. It is not pin-compatible with MAX6861–MAX6869 (which have CT pin) or MAX6864–MAX6869 (which have WDI pin). Always verify pin functions against the specific variant's Pin Description table before substitution.
MAX6855UK16D6+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:
- 600ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6855UK16D6+T FAQ
1.How can I place an order for MAX6855UK16D6+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6855UK16D6+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 MAX6855UK16D6+T reliable?
The price and inventory of MAX6855UK16D6+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6855UK16D6+T is usually 5 days.
3.What payment methods are accepted for MAX6855UK16D6+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6855UK16D6+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6855UK16D6+T?
MAX6855UK16D6+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6855UK16D6+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 MAX6855UK16D6+T?
For technical support, including MAX6855UK16D6+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6855UK16D6+T requirements.
6.How does Aetrix verify that MAX6855UK16D6+T is sourced from the original manufacturer or authorized distributors?
All MAX6855UK16D6+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 MAX6855UK16D6+T meets industry standards.
7.What is the process for return or replacement of MAX6855UK16D6+T?
All MAX6855UK16D6+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6855UK16D6+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 MAX6855UK16D6+T part is unused and in its original packaging.
Return procedure for MAX6855UK16D6+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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