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Analog Devices Inc./Maxim Integrated MAX6334UR20D3+
- Part No.:
- MAX6334UR20D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR20D3+.pdf
- Description:
- IC MPU LV 2.00V 100MS SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,166
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Product details
Overview
MAX6334UR20D3+ from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit in a 3-pin SOT23 package, designed for ultra-low-voltage systems with VCC as low as 1.0V. It monitors 2.0V power rails (±3% threshold accuracy over -40°C to +125°C), asserts reset for ≥100ms after VCC rises above 2.00V, and draws only 3.3µA at 2.5V - enabling reliable power-on reset in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6334UR20D3+ datasheet, MAX6334UR20D3+ pinout, MAX6334UR20D3+ application, or MAX6334UR20D3+ equivalent, key selection criteria include its 2.0V factory-trimmed reset threshold, 100ms minimum timeout, open-drain output compatibility with bidirectional μP reset pins (e.g., Motorola 68HC11), and guaranteed operation down to VCC = 1.0V - critical for low-power embedded monitoring where supply collapse immunity and minimal quiescent current are mandatory.
Technical Context
The MAX6334UR20D3+ implements a precision bandgap-based voltage comparator with factory-trimmed 2.00V reset threshold (±1.8% at +25°C, ±3% over full temperature range) and hysteresis to reject fast transients on VCC. Its internal timer generates a fixed 100ms minimum reset timeout period after VCC exceeds VTH, independent of external components.
As an open-drain device, MAX6334UR20D3+ requires an external pull-up resistor to interface with μP reset inputs; it sinks up to 500µA at VCC ≥ 1.8V while holding RESET ≤ 0.3V, and exhibits <0.5µA leakage when inactive - ensuring clean signal integrity and compatibility with mixed-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.00V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures accurate brownout detection for 2.0V nominal supplies |
| Reset Timeout Period | 100ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and enables use in 1.2V–3.3V digital systems |
| Quiescent Current | 3.3µA typical at 2.5V - minimizes battery drain in always-on monitoring applications |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and direct interfacing with bidirectional μP reset pins |
| Reset Propagation Delay | 24µs max for VCC falling at 10V/ms - provides fast response to rapid supply collapse |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6334UR20D3+ is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected directly to system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor to VCC or higher logic rail for proper assertion |
| 3 | VCC | Power supply input (1.0V–5.5V); powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.0V threshold | Eliminates need for external resistor divider or calibration, reducing BOM count and layout area |
| 100ms minimum reset timeout | Guarantees full μP core and peripheral initialization before release, preventing boot failures |
| 1.0V minimum operating voltage | Enables valid reset assertion during severe brownout conditions where VCC drops below 1.2V |
| 3.3µA supply current at 2.5V | Extends battery life in portable instruments and IoT edge nodes requiring continuous supervision |
| Transient-immune comparator | Rejects VCC glitches up to 24µs duration (at 100mV overdrive), avoiding false resets in noisy power environments |
Applications
| Industrial Controllers | Portable Medical Instruments |
|---|---|
Use Scenario: PLC I/O modules powered by 2.0V LDOs in harsh factory environments with frequent line disturbances. IC Role / Device Role / Timing Role: Monitors 2.0V VCC rail and asserts open-drain RESET to ARM Cortex-M4 microcontroller during brownout, holding reset for ≥100ms post-recovery. Use Value: Prevents corrupted register writes and firmware lockup by guaranteeing clean restart after transient-induced voltage sag. |
Use Scenario: Handheld glucose meters using coin-cell batteries with discharge curves crossing 2.0V threshold during end-of-life. IC Role / Device Role / Timing Role: Detects 2.0V supply collapse and triggers controlled shutdown via open-drain RESET tied to system PMIC enable line. Use Value: Avoids data loss and sensor misreads by enforcing safe power-down before VCC falls below ADC reference stability limits. |
| Automotive Body Control Modules | Smart Sensor Nodes |
Use Scenario: Under-dash BCMs exposed to cold cranking pulses where 12V battery dips cause 2.0V domain instability. IC Role / Device Role / Timing Role: Supervises 2.0V microcontroller supply and drives open-drain RESET into CAN transceiver reset pin to synchronize communication recovery. Use Value: Ensures deterministic CAN bus reinitialization after cold-crank events, eliminating network arbitration errors. |
Use Scenario: Wireless vibration sensors powered by energy harvesters delivering intermittent 2.0V bursts. IC Role / Device Role / Timing Role: Validates each 2.0V supply pulse and extends active window using 100ms timeout to allow full sensor readout and BLE transmission. Use Value: Maximizes usable energy per harvest cycle by preventing premature sleep mode entry during marginal supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT20D3+ | Same 2.0V threshold and 100ms timeout, but push/pull output; operates down to 0.7V VCC | Requires no pull-up resistor; unsuitable for wired-OR or bidirectional reset interfaces | Select when board-level simplicity and lowest possible VCC operation outweigh open-drain flexibility |
| TPS3808G20DBVR | 2.0V threshold, 100ms timeout, open-drain output; higher 8µA ICC at 2.5V; supports 0.8V–6.0V VCC | Broader supply range but higher quiescent current reduces battery lifetime in ultra-low-power use cases | Select when wider input voltage tolerance is needed and 5µA additional current drain is acceptable |
Compared with MAX6334UR20D3+, MAX6326UT20D3+ offers lower minimum VCC (0.7V vs. 1.0V) but lacks open-drain flexibility, while TPS3808G20DBVR extends voltage range at the cost of 2.4× higher supply current - making MAX6334UR20D3+ optimal for space- and energy-constrained 2.0V systems requiring robust bidirectional reset control.
Availability
MAX6334UR20D3+ is available at Aetrix Electronics and suitable for industrial controllers, portable medical instruments, automotive body control modules, and smart sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6334UR20D3+ 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 demanding industrial, automotive, and computing applications - emphasizing reliability, integration, and low-power operation.
The MAX633x family delivers ultra-low-voltage microprocessor supervisory circuits with factory-trimmed thresholds and fixed timeouts, targeting space-constrained embedded systems where supply monitoring must function reliably at sub-1.2V VCC levels without external components.
FAQ
What is the exact reset threshold voltage for MAX6334UR20D3+ and how stable is it over temperature?
The MAX6334UR20D3+ has a factory-trimmed nominal reset threshold of 2.00V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating range. This stability ensures consistent brownout detection across automotive and industrial thermal environments without requiring recalibration or external compensation networks.
Does MAX6334UR20D3+ require an external pull-up resistor, and what value is recommended?
Yes, MAX6334UR20D3+ requires an external pull-up resistor on its open-drain RESET pin. A 10kΩ to 100kΩ resistor to VCC (or compatible logic rail) is recommended: lower values improve noise immunity and rise time, while higher values minimize current draw - typical designs use 47kΩ for balanced performance in 2.0V systems.
What is the minimum supply voltage at which MAX6334UR20D3+ guarantees correct reset assertion?
MAX6334UR20D3+ guarantees correct reset assertion and release behavior down to VCC = 1.0V at -40°C to +85°C, and down to VCC = 1.2V at -40°C to +125°C. Below these voltages, reset state is not guaranteed - distinguishing it from the MAX6332/MAX6333 variants rated to 0.7V.
Can MAX6334UR20D3+ interface directly with a microcontroller that has a bidirectional reset pin?
Yes, MAX6334UR20D3+ is specifically designed for this use case: its open-drain RESET output allows wired-OR connection with μP bidirectional reset pins (e.g., Motorola 68HC11). With a single pull-up resistor, either the MAX6334UR20D3+ or the μP can assert reset - enabling coordinated system-level recovery without additional logic.
How does the 100ms reset timeout of MAX6334UR20D3+ behave across temperature and supply voltage variations?
The 100ms minimum reset timeout of MAX6334UR20D3+ is internally generated and remains stable across temperature (-40°C to +125°C) and supply voltage (1.0V to 5.5V). Typical characterization shows <±25% variation over temperature - ensuring the timeout stays well above 100ms under all specified conditions, critical for reliable μP initialization.
MAX6334UR20D3+ 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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2V
- Output:
- Open Drain or Open Collector
- 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
MAX6334UR20D3+ FAQ
1.How can I place an order for MAX6334UR20D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR20D3+ 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 MAX6334UR20D3+ reliable?
The price and inventory of MAX6334UR20D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR20D3+ is usually 5 days.
3.What payment methods are accepted for MAX6334UR20D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6334UR20D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6334UR20D3+?
MAX6334UR20D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR20D3+ 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 MAX6334UR20D3+?
For technical support, including MAX6334UR20D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR20D3+ requirements.
6.How does Aetrix verify that MAX6334UR20D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6334UR20D3+ 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 MAX6334UR20D3+ meets industry standards.
7.What is the process for return or replacement of MAX6334UR20D3+?
All MAX6334UR20D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR20D3+, 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 MAX6334UR20D3+ part is unused and in its original packaging.
Return procedure for MAX6334UR20D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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