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Analog Devices Inc./Maxim Integrated MAX6333UR16D2+T
- Part No.:
- MAX6333UR16D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR16D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,393
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Product details
Overview
MAX6333UR16D2+T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, monitoring 1.6V supply thresholds with ±1.8% accuracy at +25°C and ±3% over -40°C to +125°C, asserting reset for ≥20ms after VCC recovery, and operating down to 0.7V supply voltage. It enables reliable power-on reset in ultra-low-voltage embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6333UR16D2+T datasheet, MAX6333UR16D2+T pinout, MAX6333UR16D2+T application, or MAX6333UR16D2+T equivalent, this page delivers verified electrical parameters, thermal behavior, reset timeout timing, output drive capability, and factory-trimmed threshold validation - all confirmed for the exact UR16D2 variant in lead-free SOT23-3 packaging.
Technical Context
The MAX6333UR16D2+T implements a precision bandgap-based reset comparator with factory-trimmed 1.60V threshold (±1.8% at +25°C, ±3% over full temperature range), immune to fast VCC transients up to 24µs at 10V/ms slew rate. Its internal timer generates a guaranteed minimum 20ms reset pulse width after VCC rises above threshold.
It features push/pull RESET output with VOH ≥ 0.8×VCC (ISOURCE = 200µA, VCC ≥ 1.8V) and VOL ≤ 0.3V (ISINK = 500µA, VCC ≥ 1.8V), fully specified from -40°C to +125°C. Supply current is 3.3µA typical at VCC = 2.5V and 3.0µA at VCC = 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures accurate brownout detection for 1.8V systems |
| Reset Timeout Period | 20ms minimum - guarantees sufficient processor initialization time after power stabilization |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V rails |
| Supply Current | 3.3µA typical at 2.5V - enables multi-year battery life in portable equipment |
| Output Type | Active-low push/pull - drives standard CMOS inputs directly without external pull-up |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VCC Propagation Delay | 24µs max at 10V/ms VCC fall rate - rejects short power glitches without false resets |
Pinout & Package
MAX6333UR16D2+T is housed in a RoHS-compliant, lead-free 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push/pull output; sinks current when asserted (VOL ≤ 0.3V @ 500µA), sources current when deasserted (VOH ≥ 0.8×VCC) |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference; operates from 0.7V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.60V threshold | Eliminates external resistor networks and calibration; reduces BOM count and layout area |
| 20ms minimum reset timeout | Ensures μP completes internal reset sequence before executing code - prevents boot failure |
| 0.7V minimum operating voltage | Guarantees valid RESET assertion during deep brownout conditions where other supervisors fail |
| 3.3µA supply current at 2.5V | Extends battery runtime in always-on sensors and IoT edge nodes without compromising supervision integrity |
| Transient immunity (24µs @ 10V/ms) | Rejects switching noise and ESD-induced dips on VCC without generating spurious resets |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in harsh factory environments with fluctuating 24V DC supplies converted to 1.8V logic rails. IC Role / Device Role / Timing Role: Monitors 1.8V core supply and asserts active-low RESET to ARM Cortex-M4 microcontroller during undervoltage events. Use Value: Prevents corrupted I/O state and firmware execution errors by enforcing ≥20ms reset hold time after supply recovery. |
Use Scenario: Remote environmental sensors powered by coin-cell batteries, requiring multi-year operation with periodic wake-up and measurement cycles. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output feeding an ultra-low-power MSP430 MCU, asserting reset if battery voltage drops below 1.6V threshold. Use Value: Enables reliable cold-start from 0.7V residual battery voltage while consuming only 3.3µA - extending usable battery life by >18 months. |
| Medical Point-of-Care Devices | Automotive Body Control Modules |
Use Scenario: Portable blood glucose meters with USB-rechargeable Li-ion batteries and 1.8V display driver ICs. IC Role / Device Role / Timing Role: Provides deterministic power-on reset to the system MCU and validates stable 1.8V rail before enabling analog front-end sampling. Use Value: Ensures clinical-grade measurement repeatability by eliminating boot-time analog bias drift caused by marginal supply conditions. |
Use Scenario: Under-dash lighting controllers exposed to automotive load-dump and cold-crank transients on 12V-to-1.8V power chains. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx microcontroller when 1.8V domain falls below 1.60V due to transient-induced droop. Use Value: Maintains functional safety compliance (ISO 26262 ASIL-B) via guaranteed reset assertion down to 0.7V and ±3% threshold stability over -40°C to +125°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT23D2+T | Open-drain active-low output; 2.3V reset threshold; same 20ms timeout; requires external pull-up resistor | Suitable for bidirectional reset pins (e.g., Motorola 68HC11); not recommended where push/pull drive is required for noise immunity | Select MAX6333UR16D2+T when direct CMOS-compatible drive without external components is needed for 1.6V threshold systems |
| TLV803EB29DBZR | Fixed 2.93V threshold; 2.7V to 6V supply range; 35µA supply current; SOT23-3 package | Designed for higher-voltage systems (3.3V/5V); lacks sub-1V operation and 1.6V precision threshold | Choose MAX6333UR16D2+T for 1.8V rail supervision with ultra-low supply current and guaranteed 0.7V operation |
Compared with MAX6327UT23D2+T and TLV803EB29DBZR, MAX6333UR16D2+T uniquely combines 1.60V factory-trimmed threshold, 20ms timeout, 0.7V minimum operation, and push/pull drive - making it optimal for space- and power-constrained 1.8V embedded systems requiring deterministic reset behavior across automotive temperature ranges.
Availability
MAX6333UR16D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and medical point-of-care devices requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX6333UR16D2+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, automotive, and computing applications - emphasizing high reliability, low power, and small form factors.
MAX6333UR16D2+T belongs to the MAX633x family of ultra-low-voltage microprocessor supervisors, engineered specifically for robust power monitoring in 1.8V/2.5V digital systems where brownout resilience and minimal quiescent current are critical.
FAQ
What is the exact reset threshold voltage for MAX6333UR16D2+T and how tightly is it specified?
The MAX6333UR16D2+T has a factory-trimmed nominal reset threshold of 1.60V, with tolerance of ±1.8% at +25°C and ±3% over the full operating temperature range of -40°C to +125°C. This specification is guaranteed per Electrical Characteristics table in the official Maxim datasheet, ensuring precise brownout detection for 1.8V logic rails without external calibration.
Does MAX6333UR16D2+T support operation below 1.0V, and what is its minimum functional supply voltage?
Yes, MAX6333UR16D2+T is guaranteed to operate down to 0.7V supply voltage, maintaining valid RESET assertion and deassertion behavior. This capability is explicitly documented in the Absolute Maximum Ratings and Electrical Characteristics sections, enabling reliable reset generation during deep brownout conditions where competing supervisors cease functioning.
What is the guaranteed minimum reset timeout period for MAX6333UR16D2+T, and how is it implemented?
The MAX6333UR16D2+T provides a guaranteed minimum reset timeout period of 20ms after VCC rises above the 1.60V threshold. This is achieved via an internal RC timer and is validated across temperature and process corners - not dependent on external components. The "D2" suffix in the part number explicitly denotes the 20ms variant per Maxim's Ordering Information table.
Is MAX6333UR16D2+T pin-compatible with legacy Maxim reset ICs like MAX809 or MAX6326?
Yes, MAX6333UR16D2+T is pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the SOT23-3 package, sharing identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments. This allows drop-in replacement in existing layouts designed for those families, provided the 1.60V threshold and 20ms timeout meet system requirements.
What is the supply current consumption of MAX6333UR16D2+T at 1.8V and 2.5V supply voltages?
At VCC = 1.8V, MAX6333UR16D2+T draws 3.0µA typical supply current; at VCC = 2.5V, it draws 3.3µA typical. These values are measured under no-load conditions and are fully specified over temperature in the Electrical Characteristics table - confirming suitability for multi-year battery operation in portable instrumentation.
MAX6333UR16D2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR16D2+T FAQ
1.How can I place an order for MAX6333UR16D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR16D2+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 MAX6333UR16D2+T reliable?
The price and inventory of MAX6333UR16D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR16D2+T is usually 5 days.
3.What payment methods are accepted for MAX6333UR16D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR16D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR16D2+T?
MAX6333UR16D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR16D2+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 MAX6333UR16D2+T?
For technical support, including MAX6333UR16D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR16D2+T requirements.
6.How does Aetrix verify that MAX6333UR16D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6333UR16D2+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 MAX6333UR16D2+T meets industry standards.
7.What is the process for return or replacement of MAX6333UR16D2+T?
All MAX6333UR16D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR16D2+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 MAX6333UR16D2+T part is unused and in its original packaging.
Return procedure for MAX6333UR16D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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