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Analog Devices Inc./Maxim Integrated MAX6333UR24D2-T
- Part No.:
- MAX6333UR24D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR24D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,025
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Product details
Overview
MAX6333UR24D2-T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, designed for 1.8V–3.3V digital systems. It monitors VCC and asserts RESET when voltage falls below 2.40V (±1.8% at +25°C), maintaining assertion for ≥20ms after VCC recovers. Its 0.7V minimum operating voltage, 3.3µA supply current, and guaranteed RESET validity down to VCC = 0.7V make it suitable for battery-powered critical reset monitoring.
For engineers reviewing the MAX6333UR24D2-T datasheet, MAX6333UR24D2-T pinout, MAX6333UR24D2-T application, or MAX6333UR24D2-T equivalent, key selection criteria include factory-trimmed 2.4V reset threshold, 20ms minimum timeout, push/pull output drive capability, and operation down to 0.7V - essential for low-voltage embedded controllers and portable instrumentation.
Technical Context
The MAX6333UR24D2-T implements a precision bandgap-based reset comparator with factory-trimmed 2.40V threshold (±1.8% at +25°C, ±3% over –40°C to +125°C) and internal timeout timer generating ≥20ms active-low RESET pulse. Its push/pull output delivers VOH ≥ 0.8×VCC (ISOURCE = 200µA, VCC ≥ 1.8V) and VOL ≤ 0.3V (ISINK = 500µA, VCC ≥ 1.8V).
It operates across –40°C to +125°C with supply voltage range 0.7V to 5.5V, draws only 3.3µA typical supply current at VCC = 2.5V, and rejects fast VCC transients via comparator overdrive immunity - enabling reliable brownout detection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.40V ±1.8% at +25°C; ensures precise power-fail detection for 2.5V systems |
| Reset Timeout Period | ≥20ms min; guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V; supports ultra-low-voltage operation down to near-dead-battery conditions |
| Supply Current | 3.3µA typ at VCC = 2.5V; enables multi-year battery life in portable equipment |
| Output Type | Push/pull active-low RESET; drives CMOS inputs directly without pull-up resistor |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive under-hood environments |
| VCC Falling Propagation Delay | 24µs max; provides rapid response to supply collapse |
Pinout & Package
MAX6333UR24D2-T is housed in a 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 0.8mm 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 |
| 2 | RESET | Active-low push/pull reset output; sinks current during assertion, sources current when deasserted |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.7V operating supply | Enables reset supervision even during deep brownout or battery depletion |
| Factory-trimmed 2.4V reset threshold | Eliminates external resistor network; achieves ±1.8% accuracy at room temperature |
| 20ms minimum reset timeout | Meets boot-time requirements of ARM Cortex-M and 8-bit microcontrollers |
| 3.3µA supply current | Reduces quiescent load on coin-cell or energy-harvesting power sources |
| Transient-immune reset comparator | Rejects <24µs negative VCC glitches up to 100mV overdrive - prevents spurious resets |
Applications
| Pentium® II Computers | Critical μP/μC Power Monitoring |
|---|---|
Use Scenario: Power sequencing and brownout protection in legacy x86 desktop motherboards. IC Role / Device Role / Timing Role: Supervises 2.5V core supply and generates synchronized active-low reset pulse to CPU and chipset. Use Value: Prevents illegal instruction execution during unstable VCC by enforcing ≥20ms reset hold time after voltage recovery. |
Use Scenario: Reliable reset generation in industrial PLC controllers powered from unregulated 3.3V rails. IC Role / Device Role / Timing Role: Monitors microcontroller VCC and asserts RESET until stable 2.4V threshold is exceeded and held for timeout period. Use Value: Guarantees valid RESET signal down to 0.7V VCC, ensuring deterministic startup even after severe undervoltage events. |
| Portable/Battery-Powered Equipment | Intelligent Instruments |
Use Scenario: Reset management in handheld multimeters and data loggers using single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Detects end-of-life battery voltage drop below 2.4V and triggers controlled shutdown via microcontroller reset. Use Value: Ultra-low 3.3µA ICC extends battery service life while maintaining accurate 2.40V threshold across temperature. |
Use Scenario: Power integrity assurance in portable gas analyzers and environmental sensors operating in wide ambient temperatures. IC Role / Device Role / Timing Role: Provides temperature-stable reset supervision (±3% threshold variation from –40°C to +125°C) for ARM-based sensor fusion units. Use Value: Ensures system reliability in field-deployed instruments where thermal cycling would degrade less-stable alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT24D2-T | Same 2.4V threshold and 20ms timeout, but open-drain output requiring external pull-up | Limited to bidirectional reset interfaces (e.g., 68HC11); cannot drive CMOS inputs directly | Select when interfacing with microcontrollers requiring open-drain reset arbitration |
| TPS3124E18DBVR | 2.4V threshold, 200ms timeout (not 20ms), 1.6V min VCC, higher 8µA ICC | Longer timeout suits complex bootloaders; higher ICC reduces battery life in portable use | Choose if extended reset duration is required and ultra-low ICC is not critical |
Compared with MAX6333UR24D2-T, MAX6327UT24D2-T requires external biasing and lacks push/pull drive strength, while TPS3124E18DBVR trades 5× higher supply current and fixed 200ms timeout for broader VCC range - making MAX6333UR24D2-T optimal for space- and power-constrained 2.5V systems needing precise 20ms reset hold.
Availability
MAX6333UR24D2-T is available at Aetrix Electronics and suitable for Pentium® II computers, portable/battery-powered equipment, intelligent instruments, and critical μP/μC power monitoring requiring stable component supply across industrial temperature ranges.
Supply support for MAX6333UR24D2-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 and mixed-signal ICs for industrial, communications, and computing applications.
The MAX633x family delivers ultra-low-voltage, low-power microprocessor supervisory circuits targeting space-constrained and battery-sensitive embedded systems requiring guaranteed reset behavior down to 0.7V.
FAQ
What is the exact reset threshold voltage for MAX6333UR24D2-T?
The MAX6333UR24D2-T has a factory-trimmed nominal reset threshold of 2.40V, with tolerance of ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "UR24" suffix variant of the MAX6333UR24D2-T.
Does MAX6333UR24D2-T support operation below 1.0V supply voltage?
Yes, the MAX6333UR24D2-T is fully specified to operate down to 0.7V VCC, with guaranteed RESET/RESET validity at that level. Its supply voltage range is 0.7V to 5.5V, and electrical characteristics including reset assertion and timeout timing remain functional across this entire range per the Absolute Maximum Ratings and Electrical Characteristics tables.
What is the reset timeout period of MAX6333UR24D2-T?
The MAX6333UR24D2-T provides a minimum reset active timeout period of 20ms, as indicated by the "D2" suffix in its part number. This value is guaranteed across –40°C to +125°C and is independent of VCC within the operating range, ensuring consistent processor initialization timing under all valid supply conditions.
Is MAX6333UR24D2-T pin-compatible with MAX809 or MAX6326?
Yes, the MAX6333UR24D2-T is explicitly stated in the datasheet to be pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the SOT23-3 package. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC - matching the same physical layout and terminal function.
What output structure does MAX6333UR24D2-T use?
The MAX6333UR24D2-T uses a push/pull (totem-pole) 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 enabling direct interface with standard CMOS microcontroller reset inputs.
MAX6333UR24D2-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:
- 2.4V
- 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
MAX6333UR24D2-T FAQ
1.How can I place an order for MAX6333UR24D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR24D2-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 MAX6333UR24D2-T reliable?
The price and inventory of MAX6333UR24D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR24D2-T is usually 5 days.
3.What payment methods are accepted for MAX6333UR24D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR24D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR24D2-T?
MAX6333UR24D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR24D2-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 MAX6333UR24D2-T?
For technical support, including MAX6333UR24D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR24D2-T requirements.
6.How does Aetrix verify that MAX6333UR24D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6333UR24D2-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 MAX6333UR24D2-T meets industry standards.
7.What is the process for return or replacement of MAX6333UR24D2-T?
All MAX6333UR24D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR24D2-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 MAX6333UR24D2-T part is unused and in its original packaging.
Return procedure for MAX6333UR24D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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