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Analog Devices Inc./Maxim Integrated MAX6466UR30+T
- Part No.:
- MAX6466UR30+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6466UR30+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,870
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Product details
Overview
MAX6466UR30+T from Maxim Integrated is a lead-free, ultra-low-power µP supervisory circuit in SOT23-3 package, designed to monitor +3.0V supply rails with ±2.5% threshold accuracy over -40°C to +125°C. It features open-drain active-low output, 150ms minimum reset timeout, 1.0µA supply current at 3.6V, and internal 5% hysteresis (VTH− = 2.955V, VTH+ = 3.088V). It is used for reliable power-on reset generation in battery-powered medical devices and portable instrumentation.
For engineers reviewing the MAX6466UR30+T datasheet, MAX6466UR30+T pinout, MAX6466UR30+T application, or MAX6466UR30+T equivalent, key selection criteria include its factory-set 3.0V detection threshold, guaranteed 150ms reset assertion time after VCC recovery, open-drain output compatibility with mixed-voltage logic systems, and operation down to 1.2V supply while maintaining full specification.
Technical Context
The MAX6466UR30+T implements a precision bandgap reference and comparator-based voltage monitoring architecture with internally trimmed resistor networks. Its trip thresholds are factory-set to VTH− = 2.955V (min) / 3.000V (typ) / 3.045V (max) at +25°C, with hysteresis fixed at 5% (VTH+ = VTH− × 1.05).
As a member of the MAX6464–MAX6466 subfamily, it provides a minimum 150ms reset timeout period after VCC rises above VTH+, ensuring stable µP initialization. Its open-drain output requires an external pullup and supports interfacing to logic supplies up to +6V independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 6.0V - operates across wide input range including Li+ battery discharge profiles |
| Threshold Voltage (VTH−) | 2.955V (min) / 3.000V (typ) / 3.045V (max) at +25°C - factory-trimmed for 3.0V nominal rail monitoring |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - prevents output chatter during slow-rising/falling supply transitions |
| Reset Timeout Period | 150ms (min) / 260ms (typ) / 430ms (max) - guarantees µP remains held in reset long enough for power stabilization |
| Supply Current | 1.0µA (typ) at 3.6V - enables multi-year battery life in always-on monitoring applications |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial embedded environments |
| Output Type | Open-drain, active-low - allows level-shifting and wired-OR reset bus configurations |
Pinout & Package
SOT23-3 package: 3-pin surface-mount, 1.3mm × 2.9mm footprint, lead-free (RoHS-compliant), rated for -40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Open-drain active-low reset output - sinks current when asserted; requires external pullup resistor |
| 2 | GND | Ground reference - must be connected directly to system ground plane |
| 3 | VCC | Supply voltage and monitored input - powers device and serves as voltage sense node |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical at 3.6V - minimizes battery drain in always-active supervision |
| Factory-set 3.0V threshold | VTH− = 3.000V ±2.5% over temperature - eliminates external resistor network and calibration |
| Guaranteed reset timeout | 150ms minimum assertion after VCC recovery - ensures reliable µP boot sequence timing |
| Transient immunity | Immune to short VCC glitches ≤10µs at 100mV overdrive - prevents false resets in noisy environments |
| Logic-level flexibility | Open-drain output supports pullup to any voltage ≤6V - enables interface with 1.8V, 3.3V, or 5V logic |
Applications
| Precision Battery Monitoring | Load Switching/Power Sequencing |
|---|---|
Use Scenario: Monitoring Li+ battery voltage during discharge to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Voltage detector asserting reset signal when battery drops below 3.0V threshold. Use Value: Prevents data corruption by initiating graceful shutdown before brownout, using only 1µA quiescent current. | Use Scenario: Enabling controlled power-up sequencing between analog sensor supply and digital controller. IC Role / Device Role / Timing Role: Supervisory circuit holding µP in reset until analog rail stabilizes above 3.0V. Use Value: Ensures analog subsystem is fully powered and settled before firmware execution begins. |
| Noise-Immune µP Reset Circuits | Portable Medical Devices |
Use Scenario: Generating clean, glitch-free reset signal in ECG monitor exposed to EMI from switching regulators. IC Role / Device Role / Timing Role: Open-drain reset supervisor with 5% hysteresis and transient immunity. Use Value: Eliminates false resets caused by sub-10µs supply transients, improving clinical reliability. | Use Scenario: Providing fail-safe power-on reset for handheld glucose meter operating on coin-cell battery. IC Role / Device Role / Timing Role: Low-power supervisory IC asserting active-low reset until 3.0V rail is valid. Use Value: Guarantees deterministic startup with 150ms minimum timeout, even at cold temperatures down to -40°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466XR30+T | SC70-3 package (1.25mm × 2.0mm), identical electrical specs and threshold | Smaller footprint; higher thermal resistance; less robust mechanical mounting | Select for space-constrained PCBs where 0.05mm height reduction matters |
| TPS3808G30DBVR | TI part with 3.0V threshold, 350ms timeout, 2.5µA ICC, SOT23-6 package | Longer timeout, higher supply current, different pinout (6-pin vs 3-pin), no open-drain option | Choose when longer reset hold time is required and board layout allows extra pin count |
Compared with MAX6466UR30+T, MAX6466XR30+T offers identical functionality in a smaller SC70 package but reduced thermal performance and solder joint reliability, while TPS3808G30DBVR provides extended timeout at the cost of higher current draw and incompatible pinout-neither is pin-compatible, requiring PCB redesign.
Availability
MAX6466UR30+T is available at Aetrix Electronics and suitable for precision battery monitoring, noise-immune µP reset circuits, and portable medical devices requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX6466UR30+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 high-performance analog and mixed-signal semiconductor solutions for power, sensing, and interface applications.
The MAX6461–MAX6466 family was developed specifically for ultra-low-power voltage supervision in space- and energy-constrained systems such as portable medical instruments and battery-backed IoT endpoints.
FAQ
What is the exact voltage threshold of MAX6466UR30+T and how does it vary with temperature?
The MAX6466UR30+T has a factory-set lower trip threshold (VTH−) of 2.955V (min), 3.000V (typ), and 3.045V (max) at +25°C. Over the full -40°C to +125°C range, VTH− is guaranteed between 2.925V and 3.075V (±2.5% tolerance), with VTH+ = VTH− × 1.05 providing 5% hysteresis. These values are confirmed in Table 1a of the MAX6466UR30+T datasheet.
Does MAX6466UR30+T provide a reset timeout, and what is its duration?
Yes, MAX6466UR30+T is a µP supervisory circuit (not a basic voltage detector) and provides a guaranteed minimum reset timeout period of 150ms after VCC rises above VTH+. The typical timeout is 260ms, with a maximum of 430ms across temperature and process variation. This ensures the microcontroller remains held in reset long enough for power rails and clocks to stabilize.
What output configuration does MAX6466UR30+T use, and how should it be connected?
MAX6466UR30+T uses an open-drain, active-low output. Pin 1 (OUT) must be pulled up externally to a logic supply (≤6V) via a resistor (typically 10kΩ–100kΩ). When VCC falls below VTH−, OUT sinks current to GND; when VCC exceeds VTH+, OUT goes high-impedance. This configuration enables wired-OR reset buses and level-shifting across voltage domains.
Can MAX6466UR30+T operate from a 1.8V supply while monitoring a 3.0V rail?
No - MAX6466UR30+T monitors the same voltage applied to its VCC pin. It cannot monitor a higher voltage rail than its supply. To supervise a 3.0V rail, VCC must be connected to that 3.0V source. The device operates down to 1.2V, so it will function correctly when the 3.0V rail is present, but it cannot derive power from a separate 1.8V supply while monitoring 3.0V.
Is MAX6466UR30+T RoHS-compliant and what packaging does it use?
Yes, MAX6466UR30+T is RoHS-compliant and supplied in lead-free packaging. The "+T" suffix explicitly denotes lead-free tape-and-reel delivery. It is housed in a 3-pin SOT23-3 package (2.9mm × 1.3mm × 1.0mm), qualified for operation from -40°C to +125°C, with moisture sensitivity level (MSL) 1.
MAX6466UR30+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:
- 3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6466UR30+T FAQ
1.How can I place an order for MAX6466UR30+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466UR30+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 MAX6466UR30+T reliable?
The price and inventory of MAX6466UR30+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466UR30+T is usually 5 days.
3.What payment methods are accepted for MAX6466UR30+T?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466UR30+T?
MAX6466UR30+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466UR30+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 MAX6466UR30+T?
For technical support, including MAX6466UR30+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466UR30+T requirements.
6.How does Aetrix verify that MAX6466UR30+T is sourced from the original manufacturer or authorized distributors?
All MAX6466UR30+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 MAX6466UR30+T meets industry standards.
7.What is the process for return or replacement of MAX6466UR30+T?
All MAX6466UR30+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466UR30+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 MAX6466UR30+T part is unused and in its original packaging.
Return procedure for MAX6466UR30+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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