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Analog Devices Inc./Maxim Integrated MAX6466XR44+T
- Part No.:
- MAX6466XR44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR44+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,240
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Product details
Overview
MAX6466XR44+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low reset output, 4.4V lower trip threshold (VTH− = 4.400V typ), 150ms minimum reset timeout, and 1.0µA supply current at 3.6V. It monitors system VCC in battery-powered medical devices and portable electronics to ensure reliable µP reset during brownout conditions.
For engineers reviewing the MAX6466XR44+T datasheet, MAX6466XR44+T pinout, MAX6466XR44+T application, or MAX6466XR44+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 voltage transients, and SC70-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6466XR44+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 4.400V (±2.5% over temperature) and VTH+ = VTH− × 1.05 = 4.620V. Its internal hysteresis prevents output chatter near threshold transitions.
As a µP supervisory variant (not a simple voltage detector), it asserts the open-drain OUT pin low when VCC falls below VTH− and holds it low for ≥150ms after VCC rises above VTH+, ensuring robust reset timing independent of external RC networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.0µA at 3.6V - enables multi-year battery life in always-on monitoring applications |
| Lower Threshold (VTH−) | 4.400V (±2.5% over −40°C to +125°C) - precisely triggers reset before 4.5V logic rails become unreliable |
| Upper Threshold (VTH+) | 4.620V (5% hysteresis) - prevents oscillation during slow-rising power-up sequences |
| Reset Timeout Period | 150ms minimum - meets JEDEC JESD78 requirement for microcontroller reset hold time |
| Output Type | Open-drain active-low - allows level-shifting to higher-voltage logic domains via external pullup |
| Operating Temperature | −40°C to +125°C - supports automotive under-hood and industrial embedded environments |
| Propagation Delay | Not specified for MAX6466 - timeout-based assertion replaces propagation delay as primary timing parameter |
Pinout & Package
MAX6466XR44+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for ultra-compact portable designs. Pin 1 is OUT (open-drain active-low), Pin 2 is GND, and Pin 3 is VCC (monitored supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain reset output | Asserts low on undervoltage; requires external pullup resistor to define logic-high voltage domain |
| 2 (GND) | Ground reference | Return path for internal bandgap and comparator; must be connected directly to system ground plane |
| 3 (VCC) | Supply and monitored input | Simultaneously powers device and provides voltage to be supervised; no separate sense pin required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA at 3.6V - reduces standby power by >90% vs. legacy reset ICs, critical for coin-cell operation |
| Factory-trimmed threshold | VTH− = 4.400V with ±2.5% accuracy over full temperature range - eliminates need for external calibration or trimming |
| Guaranteed reset timeout | 150ms minimum assertion after VCC recovery - ensures µP completes internal initialization before release |
| Transient immunity | Immune to <15µs falling glitches at 4.3V overdrive - rejects noise-induced false resets in noisy DC/DC environments |
| Lead-free packaging | +T suffix denotes RoHS-compliant, matte-tin lead finish - meets IPC-J-STD-020 moisture sensitivity Level 1 |
Applications
| Portable Medical Sensors | Battery-Powered IoT Nodes |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 3.0V nominal output. IC Role / Device Role / Timing Role: Supervises VCC to assert reset if battery drops below 4.4V, holding µP in reset until stable power returns for 150ms. Use Value: Prevents corrupted sensor data writes during brownout by guaranteeing µP remains held until regulated 3.3V rail is fully established. |
Use Scenario: LPWAN node using LoRa transceiver and ARM Cortex-M0+ MCU, operating intermittently on AA alkaline cells. IC Role / Device Role / Timing Role: Monitors main 3.6V supply; triggers 150ms reset pulse on voltage sag to synchronize wake-up sequence across RF and digital subsystems. Use Value: Eliminates need for discrete RC reset network, saving 2.5mm² PCB area and improving long-term timing stability across temperature. |
| Industrial Handheld Scanners | Automotive Telematics Modules |
Use Scenario: Rugged barcode scanner with cold-cranking tolerance down to −40°C and 12V battery input. IC Role / Device Role / Timing Role: Detects 4.4V dropout on internal 5V LDO output; asserts open-drain reset to MCU while allowing pullup to 5V logic domain. Use Value: Enables single-supply supervision without level translators, reducing BOM count and failure points in harsh ESD environments. |
Use Scenario: CAN-connected telematics unit exposed to load-dump transients and wide ambient temperature swings. IC Role / Device Role / Timing Role: Provides fail-safe reset during alternator dropout events; hysteresis prevents chatter during 12V-to-5V regulator recovery. Use Value: Meets AEC-Q100 Grade 1 thermal requirements (−40°C to +125°C) without derating, ensuring reliability in engine bay mounting. |
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, 1.1µA ICC, SOT23-5 package | Requires 5-pin layout; lacks 4.4V threshold granularity for 4.5V rail monitoring | Select when 3.3V rail supervision is needed and board space permits SOT23-5 footprint |
| ADM6315-44ARTZ-R7 | 4.4V threshold, 140ms timeout, 2.5µA ICC, SOT23-3 package, ±2.0% accuracy | Slightly tighter threshold tolerance but higher supply current reduces battery life | Prefer for cost-sensitive industrial designs where 140ms timeout is acceptable and 0.5µA extra ICC is tolerable |
Compared with TPS3808G33DBVR and ADM6315-44ARTZ-R7, the MAX6466XR44+T uniquely delivers 4.4V threshold accuracy, 150ms timeout, and 1.0µA ICC in SC70-3 - making it optimal for space- and power-constrained 4.5V system supervision where minimal PCB real estate and multi-year battery life are mandatory.
Availability
MAX6466XR44+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT nodes, industrial handheld scanners, and automotive telematics modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466XR44+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, sensing, and interface applications, with emphasis on high-reliability, low-power solutions.
The MAX6461–MAX6466 family was engineered specifically for ultra-low-power voltage supervision in battery-critical systems, delivering factory-trimmed thresholds and guaranteed timeout periods without external components.
FAQ
What is the exact voltage threshold of MAX6466XR44+T?
The MAX6466XR44+T has a factory-set lower trip threshold (VTH−) of 4.400V (typical) with ±2.5% accuracy over −40°C to +125°C, and an upper threshold (VTH+) of 4.620V (5% hysteresis). These values are confirmed in Table 1a and 1b of the official datasheet, and apply specifically to the "44" suffix variant of the MAX6466XR44+T.
Does MAX6466XR44+T require an external pullup resistor?
Yes, the MAX6466XR44+T features an open-drain active-low output (OUT pin), which requires an external pullup resistor to define the logic-high voltage level. The datasheet specifies that the pullup may connect to any supply from 0V to 6V, enabling interoperability with different logic domains - a key design feature of the MAX6466XR44+T.
What is the minimum reset timeout period for MAX6466XR44+T?
The MAX6466XR44+T guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+. This timeout is internally generated and does not rely on external RC components, ensuring consistent reset timing across temperature and voltage - a defining characteristic of the MAX6466XR44+T supervisory function.
Is MAX6466XR44+T compatible with SC70-3 footprint?
Yes, the MAX6466XR44+T is packaged in SC70-3 (2.0mm × 2.1mm × 0.9mm), with pin 1 = OUT, pin 2 = GND, and pin 3 = VCC. This matches the mechanical outline and solder pad dimensions defined in Maxim's package documentation for the "XR" prefix, confirming direct SC70-3 compatibility for the MAX6466XR44+T.
How does MAX6466XR44+T handle voltage transients?
The MAX6466XR44+T is immune to short-duration falling VCC transients: for a 4.3V overdrive (i.e., VCC dropping to 0.1V below VTH−), it tolerates transients up to ~15µs without asserting reset - per the "Maximum VCC Transient Duration vs. VTH− Threshold Overdrive" graph in the datasheet. This transient immunity is intrinsic to the MAX6466XR44+T design and requires no external filtering.
MAX6466XR44+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:
- 4.4V
- 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
MAX6466XR44+T FAQ
1.How can I place an order for MAX6466XR44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR44+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 MAX6466XR44+T reliable?
The price and inventory of MAX6466XR44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR44+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR44+T?
MAX6466XR44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR44+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 MAX6466XR44+T?
For technical support, including MAX6466XR44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR44+T requirements.
6.How does Aetrix verify that MAX6466XR44+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR44+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 MAX6466XR44+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR44+T?
All MAX6466XR44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR44+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 MAX6466XR44+T part is unused and in its original packaging.
Return procedure for MAX6466XR44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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