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Analog Devices Inc./Maxim Integrated MAX6466XR22+T
- Part No.:
- MAX6466XR22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR22+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:830
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Product details
Overview
MAX6466XR22+T from Maxim Integrated is a lead-free, ultra-low-power µP supervisory circuit in SC70-3 package, monitoring VCC with 2.200V lower trip threshold (VTH−), 5% internal hysteresis, ±2.5% threshold accuracy over −40°C to +125°C, and minimum 150ms reset timeout period-designed for reliable power-on reset in battery-powered medical sensors.
For engineers reviewing the MAX6466XR22+T datasheet, MAX6466XR22+T pinout, MAX6466XR22+T application, or MAX6466XR22+T equivalent, key selection criteria include guaranteed 150ms timeout duration, open-drain active-low output requiring external pullup, 1.0µA supply current at 3.6V, and immunity to sub-20µs VCC transients at 2.2V threshold overdrive.
Technical Context
The MAX6466XR22+T implements a precision bandgap reference and comparator-based supervision architecture with internally trimmed resistor networks setting VTH− = 2.200V (±2.5%) and VTH+ = 2.310V (VTH− × 1.05). It features fixed 5% hysteresis and no external components required for basic operation.
As a member of the MAX6464–MAX6466 µP supervisory subgroup, it asserts its open-drain output low when VCC falls below VTH− and holds low for ≥150ms after VCC rises above VTH+, ensuring robust reset timing independent of microcontroller firmware behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.0µA at 3.6V - enables multi-year battery life in always-on portable devices |
| Lower Threshold (VTH−) | 2.200V ±2.5% - precisely monitors 2.2V nominal rails or Li-ion battery discharge endpoints |
| Hysteresis | 5% (VTH+ = 2.310V) - prevents output chatter during slow-rising/falling supply transitions |
| Reset Timeout | 150ms minimum - guarantees sufficient hold time for full µP initialization and clock stabilization |
| Operating Temp Range | −40°C to +125°C - supports automotive under-hood and industrial embedded environments |
| Output Type | Open-drain active-low - allows level-shifting via external pullup to any voltage ≤6V |
| Propagation Delay | Falling edge: 17µs - fast response to brownout conditions without excessive delay |
Pinout & Package
MAX6466XR22+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained PCB layouts. Pin 1 is OUT, Pin 2 is GND, Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain active-low output | Must be pulled up externally; sinks current only when asserted; compatible with 0–6V logic domains |
| 2 (GND) | Analog/digital ground reference | Single ground connection; requires low-impedance path to system ground plane |
| 3 (VCC) | Supply input and monitored voltage | Accepts 1.2V–6.0V; simultaneously powers device and serves as monitored rail |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA at 3.6V - reduces standby power in energy-harvesting and coin-cell systems |
| Factory-trimmed threshold | VTH− = 2.200V ±2.5% - eliminates calibration overhead and BOM cost of external resistors |
| Internal hysteresis | 5% (VTH+ = VTH− × 1.05) - ensures clean, chatter-free reset assertion during noisy or slowly varying supplies |
| Guaranteed reset timeout | 150ms minimum - meets JEDEC JESD78 reliability requirements for µP reset assertion duration |
| Transient immunity | Immune to <20µs falling glitches at 2.2V overdrive - suppresses false resets from switching noise or ESD events |
Applications
| Precision Battery Monitoring | Load Switching/Power Sequencing |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during deep discharge in wearable health monitors. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset when cell drops below 2.2V to prevent unsafe operation or data corruption. Use Value: Enables safe shutdown before battery reaches critical 2.0V cutoff, extending cycle life and avoiding deep discharge damage. |
Use Scenario: Controlling enable sequence of dual-rail DC/DC converters in portable ultrasound probes. IC Role / Device Role / Timing Role: Open-drain output drives high-side load switch gate via pullup, enforcing 150ms delay between primary and secondary rail activation. Use Value: Eliminates need for RC timing network while guaranteeing precise, temperature-stable sequencing window. |
| Noise-Immune µP Reset Circuits | Portable Medical Devices |
Use Scenario: Providing clean reset signal to ARM Cortex-M0+ MCU in ECG patch sensor exposed to RF interference. IC Role / Device Role / Timing Role: Detects VCC droop below 2.2V and holds reset active ≥150ms, ignoring sub-20µs transients from nearby wireless transmission. Use Value: Prevents spurious resets caused by conducted EMI, improving clinical data continuity and device uptime. |
Use Scenario: Supervising main power rail in handheld glucose meters operating on CR2032 coin cells. IC Role / Device Role / Timing Role: Monitors declining battery voltage and triggers controlled shutdown before display or sensor malfunction occurs. Use Value: Delivers accurate end-of-life warning with 2.2V threshold aligned to typical CR2032 discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466UR22+T | SOT23-3 package (2.9mm × 1.6mm); identical electrical specs and threshold | Larger footprint but higher thermal mass; preferred for manual soldering or high-vibration environments | Select when board layout accommodates larger SOT23 or when reworkability is prioritized over size |
| TPS3808G12DBVR | Fixed 1.2V threshold; 350ms timeout; push-pull active-low output; 1.5µA ICC | Not suitable for 2.2V monitoring; longer timeout may delay system startup unnecessarily | Choose only if 1.2V rail supervision is required and longer reset hold time is acceptable |
Compared with MAX6466UR22+T, the MAX6466XR22+T saves 0.7mm² board area in SC70-3 while maintaining identical supervision behavior; versus TPS3808G12DBVR, it provides exact 2.2V threshold alignment and shorter, more responsive reset timing for battery-critical applications.
Availability
MAX6466XR22+T is available at Aetrix Electronics and suitable for precision battery monitoring, portable medical devices, and noise-immune µP reset circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466XR22+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 precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and medical markets.
The MAX6461–MAX6466 family was engineered specifically for ultra-low-power, high-accuracy voltage supervision in space- and energy-constrained portable electronics-emphasizing zero external components, guaranteed timeout, and wide-temperature reliability.
FAQ
What is the exact lower threshold voltage (VTH−) of the MAX6466XR22+T?
The MAX6466XR22+T has a factory-trimmed lower trip threshold of 2.200V at +25°C, with guaranteed tolerance of ±2.5% over the full −40°C to +125°C operating range. This value is confirmed in Table 1a of the datasheet and corresponds directly to the "22" suffix in the part number. The upper threshold (VTH+) is fixed at 2.310V (2.200V × 1.05) due to internal 5% hysteresis.
Does the MAX6466XR22+T require an external pullup resistor on the OUT pin?
Yes, the MAX6466XR22+T features an open-drain active-low output, so an external pullup resistor is mandatory for proper logic-level generation. The datasheet specifies that the pullup can connect to any voltage from 0V to 6V, enabling interfacing with different logic families. Typical values range from 10kΩ to 100kΩ depending on sink current and rise-time requirements.
What is the minimum reset timeout period guaranteed for the MAX6466XR22+T?
The MAX6466XR22+T guarantees a minimum reset timeout period of 150ms, as defined for all MAX6464–MAX6466 variants. This timeout begins when VCC rises above VTH+ (2.310V) and ensures the reset signal remains asserted for at least 150ms-critical for reliable microcontroller initialization and clock stabilization in embedded systems.
Can the MAX6466XR22+T operate down to 1.2V supply voltage?
Yes, the MAX6466XR22+T is fully specified to operate with VCC as low as 1.2V, per Absolute Maximum Ratings and Electrical Characteristics tables. However, its 2.200V threshold means it will assert reset well before reaching 1.2V-typically triggering at ~2.2V and remaining asserted until VCC exceeds 2.310V, making it unsuitable for monitoring rails below 2.2V.
How does the MAX6466XR22+T handle short voltage transients on the VCC line?
The MAX6466XR22+T is designed to ignore short-duration falling transients: the Typical Operating Characteristics graph (toc04) shows it remains immune to glitches ≤20µs wide when VCC dips 100mV below VTH− (i.e., to 2.1V). This transient immunity prevents false resets caused by switching noise, ESD coupling, or load-step events in noisy power environments.
MAX6466XR22+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.2V
- 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
MAX6466XR22+T FAQ
1.How can I place an order for MAX6466XR22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR22+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 MAX6466XR22+T reliable?
The price and inventory of MAX6466XR22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR22+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR22+T?
MAX6466XR22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR22+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 MAX6466XR22+T?
For technical support, including MAX6466XR22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR22+T requirements.
6.How does Aetrix verify that MAX6466XR22+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR22+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 MAX6466XR22+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR22+T?
All MAX6466XR22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR22+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 MAX6466XR22+T part is unused and in its original packaging.
Return procedure for MAX6466XR22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MIC826SYMT-TR
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