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Analog Devices Inc./Maxim Integrated MAX6466UR31+T
- Part No.:
- MAX6466UR31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6466UR31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,689
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Product details
Overview
MAX6466UR31+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 generation in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the MAX6466UR31+T datasheet, MAX6466UR31+T pinout, MAX6466UR31+T application, or MAX6466UR31+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 MAX6466UR31+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 brownout and clean deassertion after recovery. Its internal hysteresis prevents chatter near threshold transitions.
As a member of the MAX6464–MAX6466 µP supervisory subgroup, it delivers a minimum 150ms reset timeout after VCC rises above VTH+, independent of input slew rate - critical for ensuring microcontroller initialization completes before system operation resumes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH− Threshold | 3.100V ±2.5% (−40°C to +125°C); ensures reset asserts when monitored supply drops below 3.023V min / 3.178V max |
| VTH+ Threshold | 3.255V ±2.5% (−40°C to +125°C); guarantees reset remains asserted until supply exceeds 3.178V min / 3.332V max |
| Reset Timeout | 150ms min (guaranteed); holds reset active ≥150ms after VCC crosses VTH+, meeting MCU boot timing requirements |
| Supply Current | 1.0µA typical at 3.6V; enables multi-year battery life in always-on monitoring applications |
| Hysteresis | 5% (VTH+ / VTH− = 1.05); eliminates oscillation during slow-rising/falling supply conditions |
| Output Type | Open-drain active-low; supports level-shifting via external pullup to logic rails up to 6V |
| Transient Immunity | Immune to falling VCC glitches ≤15µs at 3.1V overdrive; suppresses false resets from noise or coupling |
Pinout & Package
MAX6466UR31+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained 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 active-low reset output | Sinks current when asserted; requires external pullup resistor to define logic-high voltage level |
| 2 (GND) | Ground reference | Return path for internal bandgap and comparator; must be low-impedance connection |
| 3 (VCC) | Supply and monitored voltage input | Both powers the device and serves as the monitored rail; operates from 1.2V to 6.0V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA at 3.6V enables >10-year battery life in coin-cell–powered devices |
| Factory-set VTH− | 3.100V (suffix "31") with ±2.5% tolerance over full temperature range eliminates calibration overhead |
| Guaranteed timeout | 150ms minimum reset pulse width ensures robust MCU initialization across voltage and temperature |
| Internal hysteresis | 5% (VTH+ = VTH− × 1.05) prevents output chatter during marginal supply conditions |
| SC70-3 footprint | 2.0mm × 2.1mm body size supports high-density PCB layouts in handheld diagnostics |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with lithium coin cell powering analog front-end and BLE radio. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during battery voltage sag below 3.1V to prevent corrupted sensor readings or radio transmission errors. Use Value: 150ms guaranteed reset hold time ensures ADC and RF subsystems fully reinitialize before data capture resumes. |
Use Scenario: Environmental logger recording temperature/humidity every 5 minutes using a CR2032 battery. IC Role / Device Role / Timing Role: Power-on reset generator that holds µC in reset until regulated 3.3V rail stabilizes post-brownout. Use Value: 1.0µA quiescent current extends operational lifetime beyond 5 years without battery replacement. |
| Industrial Handheld Scanners | Wearable Health Trackers |
Use Scenario: Rugged barcode scanner operating from rechargeable Li-ion with wide ambient temperature range. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when battery voltage falls below 3.1V during cold-weather operation. Use Value: ±2.5% threshold accuracy over −40°C to +125°C ensures consistent reset behavior across extreme field conditions. |
Use Scenario: Optical heart-rate monitor powered by thin-film battery with tight board area constraints. IC Role / Device Role / Timing Role: Reset supervisor providing open-drain output compatible with 1.8V I/O domain while monitoring 3.0V supply rail. Use Value: Open-drain architecture allows flexible pullup to 1.8V logic rail, eliminating level-shifter components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466XR31+T | Same electrical specs and threshold, but in SC70-3 package with different top marking (ALB); identical pinout and thermal performance. | No change in circuit function or layout; differs only in package footprint (same 3-pin SC70-3 outline). | Select MAX6466XR31+T if SC70-3 tape-and-reel packaging or standard top-marking (ALB) is required for assembly traceability. |
| TPS3808G31DBVR | 3.1V threshold, 200ms timeout, 1.1µA ICC, SOT23-5 package; lacks internal hysteresis (requires external resistor network). | Requires external components for hysteresis implementation; larger 5-pin footprint increases board area. | Choose TPS3808G31DBVR only if longer timeout (200ms) is mandatory and additional board space/component count is acceptable. |
Compared with MAX6466UR31+T, MAX6466XR31+T offers identical functionality in the same SC70-3 package but with alternate marking, while TPS3808G31DBVR trades integrated hysteresis and smaller footprint for extended timeout and higher supply current - making MAX6466UR31+T optimal for ultra-low-power, space-constrained designs requiring self-contained reset timing.
Availability
MAX6466UR31+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial handheld scanners requiring stable component supply with guaranteed long-term availability and lead-free compliance.
Supply support for MAX6466UR31+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 demanding environments.
The MAX6461–MAX6466 family was engineered specifically for ultra-low-power supervisory functions in battery-critical systems - delivering nanoscale current draw, factory-trimmed thresholds, and guaranteed reset timing without external components.
FAQ
What is the exact VTH− and VTH+ threshold voltage for MAX6466UR31+T?
The MAX6466UR31+T has a nominal lower trip threshold VTH− of 3.100V and upper trip threshold VTH+ of 3.255V (VTH+ = VTH− × 1.05). Over −40°C to +125°C, VTH− is guaranteed between 3.023V and 3.178V, and VTH+ between 3.178V and 3.332V per Table 1a/b in the datasheet. These values are factory-trimmed and do not require external calibration.
Does MAX6466UR31+T require an external pullup resistor on the OUT pin?
Yes, MAX6466UR31+T features an open-drain active-low output, so an external pullup resistor is mandatory to establish a valid logic-high level. The datasheet recommends selecting a resistor value large enough to ensure VOL ≤ 0.4V at ISINK = 9.0mA (for VCC ≥ 4.5V) yet small enough to drive connected loads - typically 10kΩ to 100kΩ depending on bus capacitance and logic family.
What is the minimum reset timeout period of MAX6466UR31+T, and how is it guaranteed?
The MAX6466UR31+T provides a minimum reset timeout period of 150ms after VCC rises above VTH+. This is an internal, temperature-compensated timer - not dependent on external RC networks - and is guaranteed across −40°C to +125°C per the Electrical Characteristics table. Typical timeout is 260ms, with maximum 430ms, ensuring robust MCU initialization under all operating conditions.
Can MAX6466UR31+T monitor a 1.8V supply rail?
No - MAX6466UR31+T is factory-set to monitor at 3.1V and operates with VCC from 1.2V to 6.0V, but its internal threshold is fixed at 3.1V. To supervise a 1.8V rail, a different variant (e.g., MAX6466UR18+T) with 1.8V threshold suffix must be selected. The "31" in MAX6466UR31+T explicitly denotes the 3.1V trip point and cannot be reconfigured.
Is MAX6466UR31+T compatible with lead-free PCB assembly processes?
Yes, MAX6466UR31+T uses lead-free packaging (indicated by the "+T" suffix) and is rated for standard Pb-free reflow profiles, including peak temperatures up to +260°C. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH, and is qualified for industrial temperature operation from −40°C to +125°C.
MAX6466UR31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-3
MAX6466UR31+T FAQ
1.How can I place an order for MAX6466UR31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466UR31+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 MAX6466UR31+T reliable?
The price and inventory of MAX6466UR31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466UR31+T is usually 5 days.
3.What payment methods are accepted for MAX6466UR31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466UR31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466UR31+T?
MAX6466UR31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466UR31+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 MAX6466UR31+T?
For technical support, including MAX6466UR31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466UR31+T requirements.
6.How does Aetrix verify that MAX6466UR31+T is sourced from the original manufacturer or authorized distributors?
All MAX6466UR31+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 MAX6466UR31+T meets industry standards.
7.What is the process for return or replacement of MAX6466UR31+T?
All MAX6466UR31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466UR31+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 MAX6466UR31+T part is unused and in its original packaging.
Return procedure for MAX6466UR31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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