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Analog Devices Inc./Maxim Integrated MAX6466XR20+T
- Part No.:
- MAX6466XR20+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR20+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
MAX6466XR20+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low output, 2.0V lower trip threshold (VTH−), 2.1V upper trip threshold (VTH+), 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 MAX6466XR20+T datasheet, MAX6466XR20+T pinout, MAX6466XR20+T application, or MAX6466XR20+T equivalent, key selection criteria include its factory-set 2.0V detection threshold, guaranteed 150ms reset pulse width, −40°C to +125°C operating range, SC70-3 package footprint, and immunity to sub-20µs VCC transients.
Technical Context
The MAX6466XR20+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 2.000V (±2.5% over temperature) and VTH+ = 2.100V (5% hysteresis). Its open-drain output requires an external pullup and asserts low when VCC falls below VTH−, holding low for ≥150ms after VCC rises above VTH+.
This device belongs to the MAX6464–MAX6466 subgroup optimized for µP reset supervision-not simple voltage detection-delivering deterministic timeout behavior without external timing components. Its 1.0µA ICC enables multi-year operation in coin-cell–powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.2V to +6.0V - supports monitoring of Li+ cells, 3.3V/5V rails, and post-regulator outputs |
| Lower Threshold (VTH−) | 2.000V ±2.5% (−40°C to +125°C) - factory-trimmed for precise 2.0V brownout detection |
| Upper Threshold (VTH+) | 2.100V (VTH− × 1.05) - fixed 5% hysteresis prevents output chatter near threshold |
| Reset Timeout Period | 150ms minimum - guarantees µP remains held in reset long enough for power stabilization |
| Supply Current (ICC) | 1.0µA typical at 3.6V - enables >10-year battery life in always-on monitoring applications |
| Output Type | Open-drain, active-low - allows level-shifting via external pullup to any voltage ≤6V |
| Operating Temperature | −40°C to +125°C - qualified for automotive under-hood and industrial embedded use |
Pinout & Package
MAX6466XR20+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 (supply and monitored voltage input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Open-drain output | Asserts low on VCC undervoltage; requires external pullup; sinks up to 1mA at 0.4V |
| GND (Pin 2) | Ground reference | Return path for internal circuitry and output sink current; must be low-impedance |
| VCC (Pin 3) | Supply and monitor input | Single node powers device and provides voltage to be supervised; accepts 1.2V–6.0V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA at 3.6V - reduces quiescent load on primary battery by >95% vs. legacy supervisors |
| Factory-set 2.0V threshold | VTH− = 2.000V (±2.5%) - eliminates external resistor divider and calibration effort |
| Guaranteed 150ms reset pulse | Minimum tRP = 150ms - ensures microcontroller completes power-up initialization before release |
| Transient immunity | Rejects <20µs glitches at 200mV overdrive - prevents false resets from switching noise |
| Wide temperature range | −40°C to +125°C operation - supports deployment in unregulated environments without derating |
Applications
| Portable Medical Sensors | Battery-Powered IoT Endpoints |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring undervoltage lockout before sensor biasing begins. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset to MCU until VCC stabilizes above 2.0V and holds for ≥150ms. Use Value: Prevents erroneous sensor readings and firmware execution during weak-battery brownout, extending usable battery life by avoiding premature shutdown. |
Use Scenario: LPWAN node transmitting environmental data every 5 minutes using intermittent wake-up; VCC sourced from energy-harvesting capacitor. IC Role / Device Role / Timing Role: Open-drain reset supervisor interfaced to 1.8V logic via 10kΩ pullup, ensuring clean MCU boot after capacitor recharge. Use Value: Enables reliable startup from variable harvested voltage without external RC timing network or voltage divider. |
| Industrial Handheld Scanners | Automotive Telematics Modules |
Use Scenario: Rugged barcode scanner operating from 3.7V Li-ion with cold-temperature storage (−30°C) and rapid warm-up cycles. IC Role / Device Role / Timing Role: Voltage supervisor monitoring main rail, asserting reset during cold-start voltage sag below 2.0V. Use Value: Eliminates boot failures caused by temporary voltage droop during motor-driven laser activation at low temperatures. |
Use Scenario: OBD-II dongle powered from vehicle battery (9V–16V) through LDO; must survive load-dump and cranking events. IC Role / Device Role / Timing Role: Reset supervisor detecting post-LDO undervoltage during engine cranking, holding MCU in reset until stable. Use Value: Guarantees deterministic recovery after 6V cranking dips, preventing corrupted CAN message transmission during reinitialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | Fixed 1.8V threshold, 200ms timeout, 1.1µA ICC, SOT23-5 package | Requires 5-pin layout; lacks SC70-3 footprint compatibility | Select when 1.8V detection is required and board space permits SOT23-5 |
| ADM6315-20ARTZ-R7 | 2.0V threshold, 200ms timeout, 2.5µA ICC, SOT23-3 package, ±2.0% accuracy | Higher supply current; tighter threshold tolerance but no transient immunity spec | Choose for cost-sensitive industrial designs where 1.5× ICC increase is acceptable |
Compared with TPS3808G18DBVR and ADM6315-20ARTZ-R7, MAX6466XR20+T offers the smallest footprint (SC70-3), lowest ICC (1.0µA), and documented immunity to short VCC transients-critical for noisy automotive and portable power domains.
Availability
MAX6466XR20+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT endpoints, and industrial handheld scanners requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466XR20+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 ultra-low-power and high-reliability solutions.
The MAX6461–MAX6466 family was engineered specifically for battery-critical systems needing deterministic reset behavior without external components-targeting portable, medical, and automotive subsystems.
FAQ
What is the exact voltage threshold of MAX6466XR20+T?
The MAX6466XR20+T has a factory-set lower trip threshold (VTH−) of 2.000V ±2.5% over −40°C to +125°C, and an upper trip threshold (VTH+) of 2.100V (5% hysteresis). These values are confirmed in Table 1a and Table 1b of the official datasheet, with VTH− = 1.950V (min) and 2.050V (max) across temperature.
Does MAX6466XR20+T require external components to operate?
No, MAX6466XR20+T operates autonomously with no external resistors or capacitors. Its threshold is factory-trimmed, hysteresis is internal, and reset timeout is built-in. Only an external pullup resistor is needed on the open-drain OUT pin to interface with downstream logic-typically 10kΩ to 3.3V or 1.8V.
What is the reset timeout duration of MAX6466XR20+T?
The MAX6466XR20+T guarantees a minimum reset timeout period of 150ms. After VCC rises above VTH+, the OUT pin remains asserted low for at least 150ms before releasing-ensuring sufficient time for power rail stabilization and microcontroller initialization.
Can MAX6466XR20+T be used with logic voltages different from VCC?
Yes, MAX6466XR20+T's open-drain output allows level shifting: connect the OUT pin to any logic supply (0V to 6V) via an external pullup resistor. This enables direct interfacing with 1.8V, 2.5V, or 3.3V MCUs even when VCC is 3.7V (Li-ion), as shown in Figure 1 of the datasheet.
Is MAX6466XR20+T qualified for automotive applications?
Yes, MAX6466XR20+T is specified from −40°C to +125°C and features robust transient immunity-rejecting VCC glitches under 20µs-as documented in the Typical Operating Characteristics. Its SC70-3 package and lead-free +T suffix meet automotive PCB assembly requirements.
MAX6466XR20+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:
- 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
MAX6466XR20+T FAQ
1.How can I place an order for MAX6466XR20+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR20+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 MAX6466XR20+T reliable?
The price and inventory of MAX6466XR20+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR20+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR20+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR20+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR20+T?
MAX6466XR20+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR20+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 MAX6466XR20+T?
For technical support, including MAX6466XR20+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR20+T requirements.
6.How does Aetrix verify that MAX6466XR20+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR20+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 MAX6466XR20+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR20+T?
All MAX6466XR20+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR20+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 MAX6466XR20+T part is unused and in its original packaging.
Return procedure for MAX6466XR20+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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