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Analog Devices Inc./Maxim Integrated MAX6333UR25D3
- Part No.:
- MAX6333UR25D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR25D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,035
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Product details
Overview
The MAX6333UR25D3 from Maxim Integrated is a push/pull, active-low microprocessor supervisory circuit in SOT23-3 package, designed to monitor 2.5V power supplies with factory-trimmed 2.50V reset threshold (±1.8% at +25°C), 100ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It delivers ultra-low 3.3µA supply current at 2.5V and supports industrial temperature range (–40°C to +125°C) for critical μP power monitoring in portable and embedded systems.
For engineers reviewing the MAX6333UR25D3 datasheet, MAX6333UR25D3 pinout, MAX6333UR25D3 application, or MAX6333UR25D3 equivalent, key selection criteria include its 2.50V precision reset threshold, 100ms timeout, push/pull active-low output structure, low-voltage operation to 0.7V, and compatibility with space-constrained SOT23 layouts in battery-powered instrumentation and controllers.
Technical Context
The MAX6333UR25D3 implements a precision voltage comparator with factory-trimmed 2.50V threshold and ±3% tolerance over –40°C to +125°C, coupled to a fixed 100ms reset timeout timer. Its push/pull output drives RESET low during VCC undervoltage and maintains assertion for ≥100ms after VCC recovers above threshold.
Designed for ultra-low-power systems, it draws only 3.3µA typical at 2.5V and remains functional down to 0.7V VCC-enabling reliable reset generation even during deep brownout conditions. The device rejects fast transients via internal comparator hysteresis and propagation delay filtering, with immunity validated up to 24µs at 10V/ms VCC fall rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures accurate 2.5V supply monitoring without external calibration |
| Reset Timeout Period | 100ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - enables operation during severe brownout and compatibility with 1.8V–3.3V digital systems |
| Supply Current | 3.3µA typical at VCC = 2.5V - minimizes quiescent power in battery-critical applications |
| Output Type | Push/pull active-low RESET - provides direct drive capability without external pull-up resistor |
| Operating Temperature | –40°C to +125°C - supports industrial and automotive under-hood environments |
| VCC Falling Propagation Delay | 24µs at 10V/ms - ensures rapid response to fast supply collapse while rejecting sub-24µs noise glitches |
Pinout & Package
MAX6333UR25D3 is housed in a 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 0.8mm footprint and 0.95mm height. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected directly to system ground plane |
| 2 (RESET) | Active-low reset output | Push/pull driver asserts logic-low during VCC undervoltage and for ≥100ms post-recovery; sinks 500µA at VCC ≥ 1.8V with VOL ≤ 0.3V |
| 3 (VCC) | Supply input | Power rail input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.50V reset threshold | Factory-trimmed to ±1.8% at +25°C and ±3% over full temperature range - eliminates need for external resistive divider or calibration |
| 100ms minimum reset timeout | Guaranteed assertion duration ensures μP/μC completes power-on initialization before release |
| 0.7V minimum operating voltage | Continues generating valid RESET signal down to VCC = 0.7V - supports robust brownout detection in low-VCC systems |
| 3.3µA supply current at 2.5V | Enables multi-year battery life in always-on portable instrumentation and IoT edge sensors |
| SOT23-3 package compatibility | Pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 - allows drop-in replacement in existing layouts |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules and motor controllers requiring reliable power-on reset and brownout recovery in harsh electrical environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M microcontrollers during VCC instability. Use Value: 100ms timeout ensures firmware bootloader execution completes; 0.7V operation prevents spurious release during 12V-to-3.3V DC-DC sag. |
Use Scenario: Handheld glucose meters and pulse oximeters powered by single-cell Li-ion batteries with wide discharge range (4.2V → 2.8V). IC Role / Device Role / Timing Role: Reset generator monitoring 2.5V LDO output feeding analog front-end and MCU core. Use Value: 2.50V threshold precisely matches sensor ADC reference; 3.3µA ICC extends battery runtime beyond 24 months in standby mode. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-dash BCMs exposed to cold cranking (VCC dip to 0.9V) and load dump transients. IC Role / Device Role / Timing Role: Primary reset supervisor for Infineon AURIX TC2xx microcontroller during ignition cycle transitions. Use Value: 24µs VCC-fall propagation delay rejects <24µs noise spikes; –40°C to +125°C rating meets AEC-Q100 Grade 2 requirements. |
Use Scenario: DIN-rail mounted electricity meters with isolated 2.5V auxiliary supply powering metrology SoC and RTC. IC Role / Device Role / Timing Role: Power-good monitor ensuring secure boot sequence integrity after AC mains interruption. Use Value: ±3% threshold tolerance over temperature prevents false resets during ambient swings; SOT23-3 footprint saves PCB area in sealed meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR25D3-T | Same 2.50V threshold and 100ms timeout, but rated only to +85°C (not +125°C); higher 5µA ICC at 2.5V | Limited to commercial-temperature consumer electronics; unsuitable for under-hood or industrial control | Select MAX6333UR25D3 when extended temperature range or lower quiescent current is required |
| TPS3808G33DBVR | 2.93V fixed threshold (not 2.50V); 200ms timeout; 1.1µA ICC; operates down to 0.8V VCC | Designed for 3.3V systems; lacks precision 2.5V monitoring capability and industrial temp support | Choose TPS3808G33DBVR only if 3.3V supply supervision and ultra-low ICC outweigh exact 2.5V threshold need |
Compared with MAX6327UR25D3-T and TPS3808G33DBVR, the MAX6333UR25D3 uniquely combines 2.50V precision threshold, 100ms timeout, –40°C to +125°C operation, and 3.3µA ICC in SOT23-3-making it optimal for 2.5V industrial and portable μP systems demanding accuracy and low power.
Availability
MAX6333UR25D3 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6333UR25D3 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 high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The MAX6332/MAX6333/MAX6334 family delivers ultra-low-voltage, low-power μP supervisory circuits optimized for 1.8V–3.3V digital systems where precision reset timing, minimal quiescent current, and small footprint are critical.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6333UR25D3?
The MAX6333UR25D3 has a factory-trimmed reset threshold of 2.50V with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This precise value is confirmed in Table 1 of the official datasheet and corresponds to the "UR25" suffix in the part number, enabling accurate 2.5V supply monitoring without external components.
Does MAX6333UR25D3 support operation below 1.0V VCC?
Yes, the MAX6333UR25D3 is guaranteed to operate correctly down to VCC = 0.7V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ultra-low operating voltage ensures reliable reset assertion during deep brownout events in battery-powered systems where VCC may sag below 1.0V before shutdown.
What is the reset timeout period for MAX6333UR25D3?
The MAX6333UR25D3 provides a nominal reset timeout period of 100ms, with a minimum guaranteed value of 100ms and maximum of 200ms (per Electrical Characteristics table). This fixed timeout is factory-programmed and ensures sufficient time for microprocessor initialization after power recovery.
Is MAX6333UR25D3 pin-compatible with other supervisory ICs?
Yes, the MAX6333UR25D3 in SOT23-3 package is pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 families. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC - enabling direct layout reuse in existing designs without PCB modification.
What output structure does MAX6333UR25D3 use?
The MAX6333UR25D3 uses a push/pull active-low RESET output. Unlike open-drain variants (e.g., MAX6334), it actively drives both high and low states - eliminating the need for an external pull-up resistor and providing stronger sink capability (500µA at VCC ≥ 1.8V with VOL ≤ 0.3V).
MAX6333UR25D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR25D3 FAQ
1.How can I place an order for MAX6333UR25D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR25D3 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 MAX6333UR25D3 reliable?
The price and inventory of MAX6333UR25D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR25D3 is usually 5 days.
3.What payment methods are accepted for MAX6333UR25D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR25D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR25D3?
MAX6333UR25D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR25D3 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 MAX6333UR25D3?
For technical support, including MAX6333UR25D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR25D3 requirements.
6.How does Aetrix verify that MAX6333UR25D3 is sourced from the original manufacturer or authorized distributors?
All MAX6333UR25D3 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 MAX6333UR25D3 meets industry standards.
7.What is the process for return or replacement of MAX6333UR25D3?
All MAX6333UR25D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR25D3, 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 MAX6333UR25D3 part is unused and in its original packaging.
Return procedure for MAX6333UR25D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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