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Analog Devices Inc./Maxim Integrated MAX6466XR45+T
- Part No.:
- MAX6466XR45+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR45+T.pdf
- Description:
- IC VOLT DETECTOR LP SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,500
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Product details
Overview
MAX6466XR45+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low reset output, 4.5V lower trip threshold (VTH− = 4.433V typ), 150ms minimum reset timeout period, and 1.0µA supply current at 3.6V. It monitors system voltage in battery-powered portable medical devices and ensures reliable µP reset during brownout conditions.
For engineers reviewing the MAX6466XR45+T datasheet, MAX6466XR45+T pinout, MAX6466XR45+T application, or MAX6466XR45+T equivalent, key selection criteria include guaranteed 150ms reset assertion after VCC recovery, ±2.5% threshold accuracy over −40°C to +125°C, immunity to short transients, and SC70-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6466XR45+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 4.433V (typ) and VTH+ = 4.632V (typ), delivering 5% hysteresis (VHYST = [(VTH+) − (VTH−)] / VTH− × 100%). Its internal timeout circuit holds the open-drain output asserted low for ≥150ms after VCC rises above VTH+, preventing premature µP release.
Designed for ultra-low-power operation, it draws only 1.0µA (typ) at 3.6V and remains fully functional from VCC = 1.2V to 6.0V. The device is immune to transients ≤18µs at 400mV overdrive and maintains ±2.5% threshold accuracy across the full −40°C to +125°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.0µA typical at 3.6V - enables multi-year battery life in always-on monitoring applications |
| Lower Threshold (VTH−) | 4.433V (typ) at +25°C, 4.388V (min) to 4.613V (max) over −40°C to +125°C - precise brownout detection at nominal 4.5V rails |
| Upper Threshold (VTH+) | 4.632V (typ), 4.585V (min) to 4.820V (max) - defines hysteresis window to prevent output chatter near threshold |
| Reset Timeout Period | 150ms (min), 260ms (typ), 430ms (max) - guarantees sufficient µP hold time after power recovery |
| Threshold Accuracy | ±2.5% over full temperature range - eliminates need for external calibration in harsh environments |
| Propagation Delay | 17µs (typ) on VCC fall - fast response to supply collapse without false triggering on noise |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial, and medical equipment use |
Pinout & Package
MAX6466XR45+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density portable designs. Pin 1 is OUT (open-drain, active-low), Pin 2 is GND, and Pin 3 is VCC (supply and monitored input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain active-low reset output | Requires external pullup; sinks current when asserted; compatible with logic supplies up to 6V |
| 2 (GND) | Ground reference | Primary return path for internal circuitry and output sink current |
| 3 (VCC) | Supply voltage and monitored input | Single pin serves dual function: powers device and provides voltage to be supervised |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1.0µA supply current | Extends battery life in coin-cell–powered devices beyond 10 years at 1Hz wake-up rate |
| Factory-set 4.5V threshold (suffix "45") | Eliminates external resistor network and calibration effort for 4.5V system rails |
| Internal 150ms reset timeout | Guarantees µP remains held until power stabilizes - no external RC timing components required |
| 5% internal hysteresis | Prevents oscillation during slow-rising/falling VCC transitions near threshold |
| −40°C to +125°C operation | Validated performance across automotive under-hood and industrial ambient extremes |
Applications
| Portable Medical Monitors | Battery-Powered IoT Sensors |
|---|---|
Use Scenario: Continuous ECG/SpO₂ monitoring in handheld clinical devices powered by single Li⁺ cell. IC Role / Device Role / Timing Role: Supervises 4.5V regulated rail derived from buck converter; asserts reset if battery drops below safe operating voltage. Use Value: Prevents corrupted data logging or unsafe operation during undervoltage conditions with guaranteed 150ms hold time. |
Use Scenario: Remote environmental sensor node operating on CR2032 coin cell with BLE transmission bursts. IC Role / Device Role / Timing Role: Detects end-of-life battery sag before deep discharge; triggers graceful shutdown sequence via µP interrupt. Use Value: Achieves >5-year field life by minimizing quiescent current (1.0µA) while maintaining accurate 4.5V threshold tolerance. |
| Industrial Handheld Terminals | Automotive Telematics Modules |
Use Scenario: Ruggedized warehouse scanner subjected to thermal cycling and ESD events. IC Role / Device Role / Timing Role: Provides noise-immune reset supervision for ARM Cortex-M4 host; rejects transients <18µs per spec. Use Value: Ensures deterministic boot behavior despite power rail glitches caused by motor switching or RF interference. |
Use Scenario: OBD-II dongle powered from vehicle battery (9V–16V) with local 4.5V LDO for MCU. IC Role / Device Role / Timing Role: Monitors 4.5V LDO output to detect regulator failure or battery disconnect during engine cranking. Use Value: Maintains ±2.5% threshold accuracy over −40°C to +125°C, critical for cold-cranking reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466UR45+T | SOT23-3 package (same pinout, larger footprint: 2.9mm × 1.6mm vs SC70-3's 2.0mm × 2.1mm); identical electrical specs | Preferred where board assembly uses standard SOT23 pick-and-place tooling or requires higher thermal mass | Select MAX6466UR45+T when SC70 handling capability is limited or thermal dissipation margin is critical. |
| TPS3808G33DBVR | 3.3V fixed threshold; 350ms timeout; 2.5µA ICC; SOT23-6 package; requires external pullup for open-drain output | Not suitable for 4.5V systems without redesign; longer timeout may delay system recovery unnecessarily | Choose TPS3808G33DBVR only if migrating to 3.3V rail and requiring TI-qualified AEC-Q100 support. |
Compared with MAX6466XR45+T, the MAX6466UR45+T offers identical functionality in a more widely supported SOT23-3 footprint, while the TPS3808G33DBVR targets different voltage domains and lacks the precise 4.5V threshold and ultra-low 1.0µA current essential for long-life 4.5V battery systems.
Availability
MAX6466XR45+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, industrial handheld terminals, and automotive telematics modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6466XR45+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 high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX6461–MAX6466 family was designed specifically for ultra-low-power voltage supervision in space- and energy-constrained battery-operated systems, emphasizing factory-trimmed accuracy, minimal external components, and extended temperature operation.
FAQ
What is the exact lower voltage threshold (VTH−) of MAX6466XR45+T at room temperature?
The MAX6466XR45+T has a nominal lower trip threshold of 4.433V at +25°C, with a guaranteed range of 4.388V (min) to 4.613V (max) across −40°C to +125°C. This value is factory-trimmed and corresponds to the "45" suffix in the part number, indicating a 4.5V nominal threshold point.
Does MAX6466XR45+T require an external pullup resistor on its OUT pin?
Yes, MAX6466XR45+T features an open-drain active-low output and requires an external pullup resistor to the desired logic supply (0V to 6V). The resistor must be sized to ensure VOL ≤ 0.4V at ISINK = 9.0mA while providing adequate rise time for the connected load; typical values range from 10kΩ to 100kΩ.
How does the 150ms reset timeout period of MAX6466XR45+T behave during power-up?
On power-up, MAX6466XR45+T asserts its open-drain output low when VCC rises above 1.2V and holds it low for a minimum of 150ms after VCC exceeds VTH+ (4.632V typ). This ensures the host µP remains held in reset until the 4.5V rail is fully stabilized, independent of external timing components.
Can MAX6466XR45+T operate reliably below 1.6V supply voltage?
MAX6466XR45+T functions down to VCC = 1.2V per Absolute Maximum Ratings, but its specified performance-including threshold accuracy and 150ms timeout-is guaranteed only from VCC = 1.6V to 6.0V. Below 1.6V, output sinking capability degrades, and reset assertion may become unreliable; design should ensure VCC stays ≥1.6V during supervision.
Is MAX6466XR45+T pin-compatible with other members of the MAX6461–MAX6466 family in SC70-3?
Yes, all SC70-3 variants in the MAX6461–MAX6466 family-including MAX6466XR45+T-share identical pinout (OUT, GND, VCC), package dimensions, and footprint. However, functional differences exist: MAX6466XR45+T provides open-drain active-low output with 150ms timeout, whereas MAX6461XR45+T is a voltage detector without timeout.
MAX6466XR45+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- 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:
- SC-70-3
MAX6466XR45+T FAQ
1.How can I place an order for MAX6466XR45+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR45+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 MAX6466XR45+T reliable?
The price and inventory of MAX6466XR45+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR45+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR45+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR45+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR45+T?
MAX6466XR45+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR45+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 MAX6466XR45+T?
For technical support, including MAX6466XR45+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR45+T requirements.
6.How does Aetrix verify that MAX6466XR45+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR45+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 MAX6466XR45+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR45+T?
All MAX6466XR45+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR45+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 MAX6466XR45+T part is unused and in its original packaging.
Return procedure for MAX6466XR45+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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