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Analog Devices Inc./Maxim Integrated MAX6466XR31+T
- Part No.:
- MAX6466XR31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR31+T.pdf
- Description:
- IC VOLT DETECTOR LP SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,250
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Product details
Overview
MAX6466XR31+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low reset output, 3.1V lower trip threshold (VTH−), 150ms minimum reset timeout period, ±2.5% threshold accuracy over −40°C to +125°C, and 1.0µA supply current at 3.6V - used for reliable power-on reset and brownout detection in battery-powered microcontroller systems.
For engineers reviewing the MAX6466XR31+T datasheet, MAX6466XR31+T pinout, MAX6466XR31+T application, or MAX6466XR31+T equivalent, key selection criteria include guaranteed 150ms reset assertion after VCC recovery, internal 5% hysteresis (VTH+ = VTH− × 1.05), SC70-3 package compatibility, and immunity to sub-20µs voltage transients at 3.1V threshold overdrive.
Technical Context
The MAX6466XR31+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 3.100V (±2.5%) and VTH+ = 3.255V (±2.5%), enabling stable reset assertion during falling VCC and release only after VCC exceeds VTH+ and sustains ≥150ms timeout. Its open-drain output requires an external pullup and sinks ≥1.0mA at VCC ≥ 1.2V.
Designed for ultra-low-power operation, it draws just 1.0µA at 3.6V and remains functional down to VCC = 1.2V, with propagation delay of 17µs (falling) and full specification across −40°C to +125°C - making it suitable for automotive body electronics and industrial sensor nodes where supply stability and temperature resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH−) | 3.100V ±2.5% at +25°C; ensures reliable brownout detection at nominal 3.3V rails |
| Upper Trip Voltage (VTH+) | 3.255V ±2.5% (VTH− × 1.05); prevents output chatter near threshold via built-in hysteresis |
| Reset Timeout Period | 150ms minimum; guarantees MCU reset hold time after VCC recovery, meeting ARM/AVR boot requirements |
| Supply Current (ICC) | 1.0µA at 3.6V, −40°C to +125°C; enables >10-year battery life in coin-cell–powered IoT endpoints |
| Output Type | Open-drain active-low; allows level-shifting to logic supplies up to 6V using external pullup |
| Propagation Delay | 17µs (VCC falling); fast response to supply collapse without compromising noise immunity |
| Operating Temperature | −40°C to +125°C; qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6466XR31+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs. Pin 1 is OUT (open-drain active-low), Pin 2 is GND, and Pin 3 is VCC - with no NC or auxiliary pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain reset output | Asserts low when VCC < 3.1V; requires external pullup to host logic rail; sinks ≥1.0mA |
| 2 (GND) | Ground reference | Must be connected directly to system ground plane; shares return path with VCC decoupling |
| 3 (VCC) | Supply and monitored input | Accepts 1.2V–6.0V; simultaneously powers device and provides voltage to monitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA at 3.6V enables multi-year operation on CR2032 batteries in wearables |
| Factory-set 3.1V threshold | Eliminates external resistor divider; reduces BOM count and layout area by 2 components |
| 150ms reset timeout | Meets JEDEC JESD78 latch-up immunity timing for 32-bit MCUs without external RC network |
| 5% internal hysteresis | Prevents false resets during slow-rising or noisy supply ramps; no external hysteresis components needed |
| Transient immunity | Rejects ≤18µs glitches at 3.1V overdrive (per Typical Operating Characteristics Figure 4) |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by single CR2032 cell with 2.8–3.3V operating range. IC Role / Device Role / Timing Role: Supervisory circuit asserting /RESET to MSP430FR59xx MCU when battery drops below 3.1V. Use Value: 1.0µA quiescent current extends usable battery life by 32% versus 3.5µA alternatives; 150ms timeout prevents spurious wakeups during load switching. |
Use Scenario: Door module with LIN transceiver and local microcontroller exposed to cold-crank (4.5V) and load-dump (18V) events. IC Role / Device Role / Timing Role: Brownout detector holding /RESET until post-cold-crank supply stabilizes above 3.255V for ≥150ms. Use Value: −40°C to +125°C rating ensures function during engine-off storage and under-hood operation; open-drain output interfaces safely to 5V LIN logic. |
| Industrial Wireless Sensor Nodes | Consumer Wearables |
Use Scenario: LoRaWAN node powered by Li-SOCl₂ battery (3.6V nominal) deployed in remote utility metering. IC Role / Device Role / Timing Role: Reset supervisor triggering deep-sleep entry when VCC falls below 3.1V, then asserting /RESET for 150ms after recovery. Use Value: SC70-3 footprint saves 35% board area vs. SOT23-5; ±2.5% threshold accuracy avoids premature shutdown at end-of-life voltage. |
Use Scenario: Smartwatch with PMIC supplying 3.3V to application processor and BLE SoC. IC Role / Device Role / Timing Role: Independent reset source ensuring clean boot after PMIC soft-start completes and VCC exceeds 3.255V. Use Value: Immunity to 15µs transients eliminates need for additional RC filtering; 1.0µA ICC contributes <0.2% to total sleep current budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 2.5µA ICC, SOT23-5 package | Higher threshold and longer timeout; requires PCB redesign for 5-pin layout | Select if 3.3V rail monitoring and extended reset hold are required; not drop-in due to pin count and threshold mismatch |
| STM809SWX6F | 3.08V threshold, 140ms timeout, 1.5µA ICC, SOT23-3 package, push-pull active-low | Lower threshold (−20mV), shorter timeout (−10ms), no hysteresis spec, push-pull output | Choose for cost-sensitive consumer apps where 3.08V detection suffices and external pullup is undesirable |
Compared with MAX6466XR31+T, TPS3808G33DBVR offers longer timeout but higher current and larger footprint, while STM809SWX6F trades threshold precision and hysteresis for lower cost and simpler drive - neither matches the 3.1V/150ms/1.0µA/SC70-3 combination of MAX6466XR31+T.
Availability
MAX6466XR31+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial wireless sensor nodes requiring stable component supply with long-term lifecycle support.
Supply support for MAX6466XR31+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 U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX6461–MAX6466 family was designed specifically for ultra-low-power reset supervision in battery-critical systems - delivering precision voltage monitoring without external components across harsh temperature ranges.
FAQ
What is the exact reset threshold voltage of MAX6466XR31+T and how is it specified over temperature?
The MAX6466XR31+T has a lower trip threshold (VTH−) of 3.100V ±2.5% at +25°C, with min/max values of 3.023V and 3.178V across −40°C to +125°C per Table 1a. Its upper trip point (VTH+) is 3.255V ±2.5%, calculated as VTH− × 1.05 - ensuring robust hysteresis against supply noise and slow ramp conditions.
Does MAX6466XR31+T require external components to operate, and what is its output configuration?
No, MAX6466XR31+T requires no external components for basic operation - all threshold-setting resistors and hysteresis are internal. Its output is open-drain active-low, meaning it sinks current when asserted and requires an external pullup resistor to the host logic rail (up to 6V). This enables flexible voltage-level interfacing without additional level shifters.
What is the guaranteed minimum reset timeout period for MAX6466XR31+T, and how does it behave during VCC recovery?
MAX6466XR31+T guarantees a minimum reset timeout period of 150ms. When VCC rises above VTH+ (3.255V), the /RESET output remains asserted for at least 150ms before deasserting - ensuring the microcontroller completes power stabilization and internal initialization before executing code. This timing is fully specified from −40°C to +125°C.
How does MAX6466XR31+T handle short voltage transients, and what is its immunity limit?
MAX6466XR31+T is immune to short falling VCC transients: per Figure 4 in the datasheet, it rejects pulses ≤18µs wide when the overdrive ((VTH−) − VCC) is 100mV. At greater overdrive (e.g., 200mV), maximum allowable transient duration decreases to ~5µs - making it suitable for noisy automotive and industrial power rails without added filtering.
Is MAX6466XR31+T compatible with SC70-3 footprints from other manufacturers, and what are its thermal limits?
Yes, MAX6466XR31+T uses the standard SC70-3 package (2.0mm × 2.1mm × 0.9mm) with JEDEC MO-203AC outline, ensuring mechanical compatibility with common SC70-3 land patterns. Its absolute maximum junction temperature is +150°C, and it operates continuously from −40°C to +125°C ambient - with derating applied above +70°C per the 2.9mW/°C power dissipation limit.
MAX6466XR31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.1V
- 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
MAX6466XR31+T FAQ
1.How can I place an order for MAX6466XR31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR31+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 MAX6466XR31+T reliable?
The price and inventory of MAX6466XR31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR31+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR31+T?
MAX6466XR31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR31+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 MAX6466XR31+T?
For technical support, including MAX6466XR31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR31+T requirements.
6.How does Aetrix verify that MAX6466XR31+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR31+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 MAX6466XR31+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR31+T?
All MAX6466XR31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR31+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 MAX6466XR31+T part is unused and in its original packaging.
Return procedure for MAX6466XR31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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