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Analog Devices Inc./Maxim Integrated MAX6333UR23D3-T
- Part No.:
- MAX6333UR23D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR23D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
The MAX6333UR23D3-T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, designed to monitor 1.8V–3.3V power supplies and assert reset when VCC falls below 2.30V (±1.8% at +25°C, ±3% over -40°C to +125°C), with guaranteed operation down to 0.7V supply and a 100ms minimum reset timeout period.
For engineers reviewing the MAX6333UR23D3-T datasheet, MAX6333UR23D3-T pinout, MAX6333UR23D3-T application, or MAX6333UR23D3-T equivalent, key selection criteria include ultra-low 3.3µA supply current at 1.8V, reset comparator immunity to fast VCC transients, factory-trimmed precision threshold, push/pull output drive capability, and compatibility with space-constrained embedded systems requiring reliable brownout detection.
Technical Context
This device implements a dedicated voltage-monitoring comparator with hysteresis and an internal timer for reset assertion timing. The reset comparator ignores transients ≤24µs at 10V/ms slew rate, and its threshold is factory-laser-trimmed to 2.30V with tight tolerance across temperature.
The 100ms minimum reset timeout (tRP) is factory-programmed and fully specified over -40°C to +125°C. Output stage is push/pull with VOH ≥0.8×VCC (ISOURCE = 200µA, VCC ≥1.8V) and VOL ≤0.3V (ISINK = 500µA, VCC ≥1.8V), ensuring robust logic-level compatibility with modern µPs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures precise brownout detection for 2.5V/3.3V systems |
| Reset Timeout Period | 100ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and enables use in ultra-low-voltage systems |
| Supply Current | 3.3µA typical at 1.8V - minimizes quiescent power in battery-powered applications |
| Output Type | Active-low push/pull - drives RESET line directly without external pull-up; compatible with standard µP reset inputs |
| VCC Transient Immunity | Rejects negative-going transients ≤24µs at 10V/ms - prevents false resets from noise or switching glitches |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6333UR23D3-T is housed in a 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and gull-wing leads. Pin 1 is GND, Pin 2 is RESET (active-low push/pull output), Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output driver; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push/pull output; asserts low during VCC undervoltage and for full 100ms timeout; sinks up to 500µA at 0.3V |
| 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 2.30V threshold | Eliminates need for external resistor divider; achieves ±1.8% accuracy at room temperature without calibration |
| 100ms factory-programmed timeout | Ensures µP reset hold time meets boot ROM requirements without external RC timing components |
| 0.7V minimum operating voltage | Guarantees valid RESET state even during severe brownout conditions where most µPs cease operation |
| 3.3µA supply current at 1.8V | Extends battery life in portable instrumentation and IoT edge nodes with infrequent wake cycles |
| Transient-immune reset comparator | Rejects sub-24µs VCC glitches common in DC-DC converter switching noise, preventing spurious resets |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power monitoring in programmable logic controllers exposed to wide ambient temperature swings and noisy 12V rail transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 µP during 24V-to-3.3V supply brownout. Use Value: Guaranteed operation down to 0.7V and -40°C to +125°C rating ensures deterministic reset behavior in harsh factory environments. |
Use Scenario: Reset management for microcontrollers in door module ECUs powered from vehicle battery with load-dump and cold-crank events. IC Role / Device Role / Timing Role: Voltage supervisor triggering 100ms reset pulse on 3.3V domain whenever battery-sourced 5V LDO dips below 2.30V. Use Value: Factory-trimmed 2.30V threshold matches 2.5V I/O rail margin; 100ms timeout exceeds ISO 16750-2 cold-crank recovery timing. |
| Portable Medical Sensors | Smart Energy Meters |
Use Scenario: Battery-powered glucose monitors using coin-cell supply with gradual voltage decay during end-of-life. IC Role / Device Role / Timing Role: Low-power supervisor detecting 1.8V rail collapse and holding µC in reset until replacement battery restores stable voltage. Use Value: 3.3µA ICC at 1.8V extends usable battery life by >20% versus higher-current alternatives; 0.7V operation detects final discharge phase. |
Use Scenario: Tamper-resistant electricity meter with dual-supply architecture (mains + backup capacitor) requiring fail-safe reset during AC loss. IC Role / Device Role / Timing Role: Monitoring 3.3V backup rail derived from supercapacitor; asserting reset if voltage decays below 2.30V during extended outage. Use Value: 100ms timeout ensures secure firmware reinitialization before meter resumes metrology; SOT23-3 footprint saves PCB area in sealed enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT23D3-T | Same 2.30V threshold and 100ms timeout, but open-drain output requiring external pull-up; operates down to 1.0V only | Suitable for bidirectional reset buses (e.g., Motorola 68HC11), not direct replacement due to output structure mismatch | Select MAX6333UR23D3-T when push/pull drive is required to avoid pull-up resistor and reduce BOM count |
| TPS3808G33DBVR | 2.93V fixed threshold (not 2.30V); 200ms timeout; 1.4µA ICC at 3.3V; same SOT23-3 package | Better suited for 3.3V-only systems needing longer timeout; cannot replace 2.30V monitoring in 2.5V domains | Choose MAX6333UR23D3-T for precise 2.30V detection in mixed-voltage systems where TPS3808G33DBVR's 2.93V threshold is too high |
Compared with MAX6327UT23D3-T and TPS3808G33DBVR, the MAX6333UR23D3-T uniquely combines 2.30V precision threshold, 100ms timeout, push/pull output, and 0.7V operation-enabling single-component reset supervision in compact, low-voltage industrial and medical designs without layout or component changes.
Availability
MAX6333UR23D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6333UR23D3-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) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX633x family delivers ultra-low-voltage, low-power supervisory circuits targeting space-constrained embedded systems requiring precise, reliable reset generation without external components.
FAQ
What is the exact reset threshold voltage of the MAX6333UR23D3-T?
The MAX6333UR23D3-T has a factory-trimmed nominal reset threshold of 2.30V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating range. This value is laser-trimmed during production and verified per Electrical Characteristics table in the datasheet.
Does the MAX6333UR23D3-T support operation below 1.0V supply voltage?
Yes, the MAX6333UR23D3-T is guaranteed to operate correctly down to 0.7V VCC, maintaining valid RESET output state throughout this range. This capability is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables for MAX6332/MAX6333 variants.
What is the reset timeout period for the MAX6333UR23D3-T?
The MAX6333UR23D3-T features a factory-programmed minimum reset timeout period of 100ms, denoted by the "D3" suffix. The actual timeout is 100ms to 200ms depending on temperature and process variation, as specified in the tRP parameter row of the Electrical Characteristics table.
Is the MAX6333UR23D3-T pin-compatible with the MAX809?
Yes, the MAX6333UR23D3-T is pin-compatible with the MAX809 in SOT23-3 package, sharing identical pinout (Pin 1=GND, Pin 2=RESET, Pin 3=VCC) and active-low push/pull output configuration. However, MAX6333UR23D3-T offers lower supply current (3.3µA vs. ~15µA) and extended temperature range (-40°C to +125°C).
What is the maximum VCC slew rate the MAX6333UR23D3-T can tolerate without false reset assertion?
The MAX6333UR23D3-T reset comparator rejects negative-going VCC transients up to 24µs duration when slew rate is 10V/ms, as confirmed in the Electrical Characteristics table under "VCC Falling Reset Delay". This immunity is achieved via internal filtering and comparator hysteresis design.
MAX6333UR23D3-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:
- 2.3V
- 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
MAX6333UR23D3-T FAQ
1.How can I place an order for MAX6333UR23D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR23D3-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 MAX6333UR23D3-T reliable?
The price and inventory of MAX6333UR23D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR23D3-T is usually 5 days.
3.What payment methods are accepted for MAX6333UR23D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR23D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR23D3-T?
MAX6333UR23D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR23D3-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 MAX6333UR23D3-T?
For technical support, including MAX6333UR23D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR23D3-T requirements.
6.How does Aetrix verify that MAX6333UR23D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6333UR23D3-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 MAX6333UR23D3-T meets industry standards.
7.What is the process for return or replacement of MAX6333UR23D3-T?
All MAX6333UR23D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR23D3-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 MAX6333UR23D3-T part is unused and in its original packaging.
Return procedure for MAX6333UR23D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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