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Analog Devices Inc./Maxim Integrated MAX6466XR23+T
- Part No.:
- MAX6466XR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,632
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Product details
Overview
MAX6466XR23+T from Maxim Integrated is a lead-free, ultra-low-power microprocessor supervisory circuit in SC70-3 package, featuring 2.3V lower trip threshold (VTH−), 150ms minimum reset timeout, ±2.5% threshold accuracy over −40°C to +125°C, and open-drain active-low output. It monitors system supply voltage in battery-powered medical devices and portable instrumentation where reliable power-on reset and glitch immunity are critical.
For engineers reviewing the MAX6466XR23+T datasheet, MAX6466XR23+T pinout, MAX6466XR23+T application, or MAX6466XR23+T equivalent, key selection considerations include its factory-set 2.3V detection point, guaranteed 150ms reset assertion time after VCC recovery, open-drain output requiring external pull-up, −40°C to +125°C operation, and 1.0µA supply current at 3.6V.
Technical Context
The MAX6466XR23+T implements a precision bandgap reference with internally trimmed resistor networks to set VTH− = 2.300V (typ) and VTH+ = 2.404V (typ), delivering 4.5–6.0% hysteresis. Its comparator-based architecture asserts the open-drain output low when VCC falls below VTH− and holds it asserted for ≥150ms after VCC rises above VTH+.
This device belongs to the MAX6464–MAX6466 subfamily optimized for µP reset supervision-not simple voltage detection-so it integrates a built-in timeout timer rather than relying on RC delays. It requires no external components and is immune to transients ≤18µs at 2.3V overdrive, per Typical Operating Characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH− Threshold | 2.300V (typ), factory-trimmed; sets precise power-fail detection point for 2.4V nominal rails |
| VTH+ Threshold | 2.404V (typ); defines minimum VCC recovery level before reset deassertion begins |
| Reset Timeout | 150ms (min); guarantees processor reset pulse width meets ARM/Cortex boot requirements |
| Supply Current | 1.0µA (typ at 3.6V); enables multi-year battery life in always-on wearable sensors |
| Threshold Accuracy | ±2.5% over −40°C to +125°C; eliminates need for calibration in automotive under-hood modules |
| Output Type | Open-drain active-low; allows level-shifting to 1.8V/3.3V logic and wired-OR reset bus sharing |
| Hysteresis | 4.5–6.0%; prevents output chatter during slow-rising/falling supply ramps in DC/DC startup |
Pinout & Package
MAX6466XR23+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), fully specified from −40°C to +125°C and RoHS-compliant (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain output | Active-low reset signal; requires external pull-up resistor (e.g., 10kΩ to VIO); sinks ≥1mA at 0.4V |
| 2 (GND) | Ground reference | Primary return path for internal bandgap and comparator; must be connected directly to system ground plane |
| 3 (VCC) | Supply & monitored input | Single pin serves as both power source and voltage sense node; operates from 1.2V to 6.0V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical at 3.6V ensures <1µA system standby current contribution in battery-critical designs |
| Factory-set VTH− | 2.300V ±2.5% eliminates trimming resistors and reduces BOM count by one component |
| Guaranteed tRP | 150ms minimum reset timeout satisfies JEDEC JESD78 latch-up immunity and ARM boot loader timing |
| Transient immunity | Rejects VCC glitches ≤18µs duration at 2.3V overdrive-critical for noisy switcher environments |
| Wide temperature range | −40°C to +125°C operation supports deployment in industrial motor drives and automotive telematics |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 2.4V nominal rail. IC Role / Device Role / Timing Role: Supervisory circuit asserting /RESET to MSP430F5xx MCU until VCC stabilizes above 2.404V post-battery insertion. Use Value: 150ms guaranteed timeout prevents premature MCU wake-up during battery contact bounce; 1.0µA ICC extends sensor shelf life to >3 years. |
Use Scenario: LoRaWAN end-node using SX1276 transceiver and STM32L0 MCU, powered by Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Open-drain /RESET generator tied to 3.3V I/O domain; pulls down during brownout to hold MCU in reset until regulated 3.3V rail exceeds 2.404V. Use Value: Level-shift capability allows reset assertion even when VCC drops below MCU I/O voltage; ±2.5% accuracy avoids false resets at cold temperatures. |
| Automotive Cabin Controllers | Industrial Handheld Scanners |
|
Use Scenario: HVAC control module operating from 12V battery via 3.3V LDO, exposed to load-dump transients. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; asserts open-drain /RESET to NXP S32K144 during undervoltage events. Use Value: Immunity to ≤18µs transients prevents spurious resets during alternator switching; SC70-3 footprint saves PCB area in space-constrained dash modules. |
Use Scenario: Rugged barcode scanner with dual-supply design: 5V analog front-end and 1.8V digital core. IC Role / Device Role / Timing Role: Provides system-wide reset signal derived from 3.3V domain; shared /RESET line coordinates power sequencing across ASIC and FPGA. Use Value: Open-drain output enables wired-OR connection with other supervisors; 2.3V threshold matches 3.3V rail UVLO margin for robust start-up under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466UR23+T | SOT23-3 package (same pinout, larger footprint: 2.9mm × 1.6mm vs SC70-3's 2.0mm × 2.1mm); identical electrical specs | Better thermal dissipation in high-ambient environments; less suitable for ultra-dense portable PCBs | Select UR version if board layout allows larger pad spacing and requires higher power handling margin |
| TPS3808G125DBVR | Texas Instruments part with 1.23V fixed threshold, 200ms timeout, 2.5µA ICC, SOT23-5 package | Higher supply current and different threshold; requires 5-pin layout; lacks transient immunity data at same confidence level | Choose only if 1.23V detection is required and 200ms timeout aligns with system boot sequence |
Compared with MAX6466XR23+T, the MAX6466UR23+T offers identical functionality in a mechanically distinct but pin-compatible SOT23-3 package, while the TPS3808G125DBVR provides longer timeout at higher quiescent current and a different threshold-making it unsuitable as a drop-in replacement without schematic and layout revision.
Availability
MAX6466XR23+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT nodes, automotive cabin controllers, and industrial handheld scanners requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466XR23+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, automotive, and communications markets.
The MAX6461–MAX6466 family was designed specifically for ultra-low-power voltage monitoring and µP reset supervision in space- and energy-constrained systems, emphasizing factory-trimmed accuracy, minimal external components, and robust transient immunity.
FAQ
What is the exact VTH− and VTH+ voltage for MAX6466XR23+T?
The MAX6466XR23+T has a factory-set lower trip threshold VTH− of 2.300V (typical), with min/max of 2.243V/2.358V over −40°C to +125°C. Its upper trip threshold VTH+ is 2.404V (typical), with min/max of 2.343V/2.464V. These values derive from Table 1a and 1b in the datasheet and reflect the "23" suffix designation.
Does MAX6466XR23+T require an external pull-up resistor on the OUT pin?
Yes, MAX6466XR23+T features an open-drain active-low output and requires an external pull-up resistor to a valid logic-high voltage (e.g., 1.8V, 3.3V, or 5V). The resistor value must ensure VOL ≤0.4V at ISINK = 9.0mA (per Electrical Characteristics) while minimizing leakage-typically 10kΩ to 100kΩ depending on bus capacitance and speed requirements.
What is the guaranteed minimum reset timeout period for MAX6466XR23+T?
The MAX6466XR23+T guarantees a minimum reset timeout period (tRP) of 150ms. This is the duration for which the /RESET signal remains asserted after VCC rises above VTH+, ensuring sufficient hold time for microcontrollers like ARM Cortex-M0+ or MSP430 to complete internal initialization before releasing reset.
Can MAX6466XR23+T operate from a 1.8V supply?
Yes, MAX6466XR23+T operates from VCC = 1.2V to 6.0V, so it functions reliably at 1.8V. However, its 2.3V detection threshold means it will assert /RESET whenever VCC drops below 2.243V (min), making it unsuitable for monitoring 1.8V rails directly-it is intended for 2.4V–2.5V nominal supplies or higher.
How does MAX6466XR23+T handle short voltage transients on the VCC line?
MAX6466XR23+T is immune to short VCC transients: the Typical Operating Characteristics graph "MAXIMUM VCC TRANSIENT DURATION vs. VTH− THRESHOLD OVERDRIVE" shows it rejects falling glitches ≤18µs wide when VCC dips 100mV below VTH− (i.e., to 2.2V). This prevents false resets during switching regulator noise or ESD-induced dips.
MAX6466XR23+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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:
- 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
MAX6466XR23+T FAQ
1.How can I place an order for MAX6466XR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR23+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 MAX6466XR23+T reliable?
The price and inventory of MAX6466XR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR23+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR23+T?
MAX6466XR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR23+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 MAX6466XR23+T?
For technical support, including MAX6466XR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR23+T requirements.
6.How does Aetrix verify that MAX6466XR23+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR23+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 MAX6466XR23+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR23+T?
All MAX6466XR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR23+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 MAX6466XR23+T part is unused and in its original packaging.
Return procedure for MAX6466XR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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