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Analog Devices Inc./Maxim Integrated MAX6333UR16D2+
- Part No.:
- MAX6333UR16D2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR16D2+.pdf
- Description:
- IC MPU/RESET CIRC 1.60V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,893
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Product details
Overview
The MAX6333UR16D2+ from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit in SOT23-3 package, designed to monitor 1.6V power rails with ±1.8% threshold accuracy at +25°C and ±3% over -40°C to +125°C, asserting reset for ≥20ms after VCC rises above threshold, and operating down to 0.7V supply-used in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6333UR16D2+ datasheet, MAX6333UR16D2+ pinout, MAX6333UR16D2+ application, or MAX6333UR16D2+ equivalent, key selection criteria include guaranteed reset validity to 0.7V VCC, factory-trimmed 1.60V reset threshold, 20ms minimum timeout, ultra-low 3.3µA supply current at 1.8V, and compatibility with space-constrained embedded systems requiring reliable brownout detection.
Technical Context
This device implements a precision voltage comparator with hysteresis-free threshold detection and an internal timer that guarantees reset assertion for ≥20ms after VCC exceeds the 1.60V factory-trimmed threshold. It features no external components required and ignores transients ≤24µs at 10V/ms slew rate.
The push/pull output drives RESET low actively during fault conditions and high (to VCC) when released, supporting direct interface with microcontroller reset inputs without pull-up resistors. Its operation is fully specified across -40°C to +125°C with <6µA max supply current at 2.5V and 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% at +25°C; ±3% over full temperature range-ensures accurate 1.6V rail monitoring without calibration. |
| Reset Timeout Period | 20ms minimum-guarantees sufficient processor initialization time after power recovery. |
| Supply Voltage Range | 0.7V to 5.5V-enables operation during deep brownout and compatibility with 1.8V/2.5V/3.3V systems. |
| Supply Current | 3.3µA typical at 1.8V, +25°C-minimizes battery drain in always-on portable applications. |
| Output Type | Active-low push/pull-drives RESET low without external pull-down; compatible with standard µP reset inputs. |
| Operating Temperature | -40°C to +125°C-supports industrial and automotive under-hood environments. |
| VCC Falling Propagation Delay | 24µs-ensures rapid response to fast-rising brownout events. |
Pinout & Package
MAX6333UR16D2+ is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 0.8mm footprint and 0.95mm height-optimized for PCB area-constrained designs.
| 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 (low), sources current when released (high to VCC). |
| 3 | VCC | Power supply input (0.7V–5.5V); powers internal comparator, timer, and output driver. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables valid reset assertion even during severe brownout-critical for fail-safe shutdown in battery-depleted systems. |
| Factory-trimmed 1.60V threshold | Eliminates need for external resistor dividers or calibration; supports precise 1.6V logic rail supervision. |
| 20ms minimum reset timeout | Guarantees µP core and peripherals complete power-up sequencing before release. |
| 3.3µA supply current at 1.8V | Extends battery life in portable instruments and IoT edge nodes with infrequent wake cycles. |
| Transient immunity | Rejects VCC glitches ≤24µs duration-prevents spurious resets from switching noise or ESD coupling. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter operating from single Li-ion cell with voltage sag during peak sensor sampling. IC Role / Device Role / Timing Role: Supervises 1.6V analog front-end supply and asserts reset if VCC drops below safe ADC reference level. Use Value: Prevents corrupted measurements by halting µP execution until regulated 1.6V rail stabilizes post-brownout. |
Use Scenario: DIN-rail mounted PLC module exposed to 24V DC field bus transients and wide ambient temperature swings. IC Role / Device Role / Timing Role: Monitors isolated 1.6V auxiliary supply powering FPGA configuration memory and I/O drivers. Use Value: Ensures deterministic FPGA reconfiguration and I/O state restoration after power interruption, meeting IEC 61000-4-4 compliance. |
| Wireless Sensor Node Controllers | Automotive Body Control Modules |
|
Use Scenario: Sub-GHz RF sensor node powered by coin cell, waking every 5 minutes for transmission. IC Role / Device Role / Timing Role: Resets ARM Cortex-M0+ MCU if 1.6V LDO output dips below threshold during RF transmit burst. Use Value: Avoids firmware lockup by forcing controlled reboot before flash corruption occurs during undervoltage. |
Use Scenario: BCM controlling door locks and interior lighting, subjected to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises 1.6V supply feeding CAN transceiver bias and microcontroller I/O buffers. Use Value: Maintains CAN communication integrity by resetting transceiver logic before VCC falls below functional minimum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR16D2+ | Same 1.60V threshold and 20ms timeout, but rated only to +85°C (vs. +125°C); 5.5µA ICC at 1.8V. | Limited to commercial-temperature consumer electronics; not suitable for under-hood or industrial enclosures. | Select MAX6326UR16D2+ only if ambient temperature stays below 85°C and higher supply current is acceptable. |
| TPS3123E16DBVR | 1.6V threshold with 200ms timeout (not 20ms); push/pull output; 1.8µA ICC at 1.8V; operates down to 0.9V (not 0.7V). | Longer timeout suits slower µPs; lower ICC benefits ultra-low-power designs; reduced brownout margin limits use in deep-sag scenarios. | Choose TPS3123E16DBVR when extended reset hold time is needed and VCC rarely falls below 0.9V. |
Compared with MAX6333UR16D2+, MAX6326UR16D2+ trades extended temperature range and lower ICC for cost reduction in benign environments, while TPS3123E16DBVR offers superior quiescent current and tighter threshold tolerance but sacrifices brownout resilience and timeout flexibility.
Availability
MAX6333UR16D2+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, wireless sensor node controllers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6333UR16D2+ 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, communications, and computing applications.
The MAX6333 series belongs to Maxim's ultra-low-voltage supervisory product line, engineered specifically for reliable reset generation in battery-powered and energy-constrained systems where supply rails dip below 1.0V.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6333UR16D2+?
The MAX6333UR16D2+ has a factory-trimmed reset threshold of 1.60V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet and corresponds to the "UR16" suffix in the part number. The threshold is laser-trimmed during production and requires no external components for accuracy.
Does MAX6333UR16D2+ support operation down to 0.7V VCC, and what happens to RESET output at that level?
Yes, MAX6333UR16D2+ is guaranteed to maintain correct RESET output state down to VCC = 0.7V. At this voltage, the push/pull driver remains functional: RESET stays low during undervoltage and transitions high after timeout when VCC recovers. The datasheet confirms this behavior for MAX6333 (but not MAX6334), and it is validated across temperature.
What is the minimum reset timeout period specified for MAX6333UR16D2+?
The MAX6333UR16D2+ provides a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in the part number. This is guaranteed across -40°C to +125°C and ensures sufficient time for microprocessor core and peripheral initialization before release. Typical timeout is 30ms, with maximum 40ms.
Is MAX6333UR16D2+ pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6333UR16D2+ is pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the SOT23-3 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC-identical mapping enables drop-in replacement without PCB changes, provided the reset threshold and timeout requirements match the application.
What is the supply current consumption of MAX6333UR16D2+ at 1.8V and room temperature?
The MAX6333UR16D2+ draws 3.3µA typical supply current at VCC = 1.8V and TA = +25°C, with a maximum of 6.0µA. This ultra-low ICC is measured with RESET not asserted and is critical for extending battery life in portable instrumentation and wireless sensors where the device remains active continuously.
MAX6333UR16D2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- 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+ FAQ
1.How can I place an order for MAX6333UR16D2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR16D2+ 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+ reliable?
The price and inventory of MAX6333UR16D2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR16D2+ is usually 5 days.
3.What payment methods are accepted for MAX6333UR16D2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR16D2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR16D2+?
MAX6333UR16D2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR16D2+ 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+?
For technical support, including MAX6333UR16D2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR16D2+ requirements.
6.How does Aetrix verify that MAX6333UR16D2+ is sourced from the original manufacturer or authorized distributors?
All MAX6333UR16D2+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6333UR16D2+?
All MAX6333UR16D2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR16D2+, 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+ part is unused and in its original packaging.
Return procedure for MAX6333UR16D2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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