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Analog Devices Inc./Maxim Integrated MAX6466UR23+T
- Part No.:
- MAX6466UR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6466UR23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:807
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Product details
Overview
MAX6466UR23+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low reset output, 2.3V lower trip threshold (VTH−), 5% internal hysteresis, and 150ms minimum reset timeout period. It monitors VCC supply voltage in battery-powered systems and asserts reset until VCC rises above VTH+ = 2.415V. Designed for portable medical devices and cellular phones requiring ultra-low quiescent current.
For engineers reviewing the MAX6466UR23+T datasheet, MAX6466UR23+T pinout, MAX6466UR23+T application, or MAX6466UR23+T equivalent, key selection criteria include guaranteed 150ms reset timeout, ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and SOT23-3 open-drain compatibility with external pull-up to logic rails up to +6V.
Technical Context
The MAX6466UR23+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 2.300V (±2.5%) and VTH+ = 2.415V. Its internal hysteresis prevents chatter during slow-rising/falling VCC transitions near threshold.
This device belongs to the MAX6464–MAX6466 µP supervisory subgroup and features no external components required, immunity to short voltage transients (<20µs at 100mV overdrive), and guaranteed operation down to VCC = 1.2V with full functionality to 6.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH−) | 2.300V ±2.5% over −40°C to +125°C - sets precise brown-out detection point for 2.4V nominal supplies |
| Reset Timeout Period | 150ms minimum - ensures reliable µP reset assertion after power recovery, meeting JEDEC JESD78 latch-up immunity requirements |
| Supply Current (ICC) | 1.0µA typical at 3.6V - enables multi-year battery life in always-on monitoring applications |
| Output Type | Open-drain active-low - allows level-shifting via external pull-up to any rail ≤6V, supporting mixed-voltage system interfacing |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - eliminates false resets during noisy or slowly recovering power rails |
| Operating Temperature | −40°C to +125°C - qualified for automotive under-hood and industrial embedded environments |
| Propagation Delay | 17µs max (falling edge) - provides fast response to supply collapse without compromising noise immunity |
Pinout & Package
SOT23-3 package: 1.3mm × 2.9mm × 1.0mm body, surface-mount, lead-free (RoHS-compliant), thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain reset output | Asserts low when VCC < VTH−; requires external pull-up; sinks ≥1mA at VOL ≤0.4V (VCC ≥4.5V) |
| 2 - GND | Ground reference | Primary return path for internal circuitry and output sink current; must be connected directly to system ground plane |
| 3 - VCC | Supply input & monitored voltage | Power source and sensed node; operates from 1.2V to 6.0V; internal circuitry references this pin for threshold comparison |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA at 3.6V - reduces standby power in battery-backed systems by >95% vs. legacy supervisors |
| Factory-trimmed VTH− | 2.300V ±2.5% - eliminates calibration overhead and external resistor networks |
| Guaranteed 150ms timeout | Min 150ms / max 430ms over temperature - satisfies µP reset timing requirements without external RC timing components |
| Transient immunity | Rejects <20µs glitches at 100mV overdrive - prevents spurious resets in electrically noisy environments |
| Wide VCC range | 1.2V to 6.0V operation - supports single-cell Li⁺, NiMH, and 3.3V/5V logic rails without auxiliary regulators |
Applications
| Portable Medical Sensors | Cellular Handsets |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by coin-cell battery with 2.4V nominal rail. IC Role / Device Role / Timing Role: Supervisory circuit asserting /RESET to microcontroller during brown-out, holding reset for ≥150ms after recovery. Use Value: Prevents firmware corruption during battery voltage sag; 1.0µA ICC extends operational life beyond 5 years on CR2032. |
Use Scenario: Baseband processor power sequencing in GSM handset with dual 2.85V/1.8V LDO outputs. IC Role / Device Role / Timing Role: Monitors 2.85V rail and generates clean, glitch-immune reset pulse to ARM core upon undervoltage. Use Value: Eliminates need for discrete RC network and Schmitt trigger; open-drain output interfaces directly to 1.8V I/O domain via 10kΩ pull-up. |
| Industrial Data Loggers | Wearable Health Trackers |
|
Use Scenario: Remote environmental sensor node using Li-SOCl₂ primary cell with gradual voltage decay. IC Role / Device Role / Timing Role: Detects end-of-life voltage drop below 2.3V and triggers controlled shutdown sequence via µP interrupt. Use Value: ±2.5% threshold accuracy ensures consistent shutdown across temperature; hysteresis prevents oscillation during slow discharge. |
Use Scenario: Optical heart-rate sensor module powered by rechargeable Li-poly with 2.5–4.2V operating range. IC Role / Device Role / Timing Role: Provides fail-safe reset during charging termination or cold-temperature startup where VCC dips transiently. Use Value: Immunity to 10µs transients avoids false resets during USB hot-plug events; SOT23-3 footprint saves PCB area in space-constrained wearables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G125DBVR | Fixed 1.25V threshold; 200ms timeout; 2.5µA ICC; push-pull active-low output | Requires external voltage divider for 2.3V monitoring; no open-drain flexibility | Select when higher timeout margin is needed and level-shifting is unnecessary |
| ADM6315-23ARTZ-RL | 2.32V threshold; 200ms timeout; 1.6µA ICC; open-drain active-low; −40°C to +125°C | Slightly tighter threshold tolerance (±1.5%), but larger SOT23-5 footprint and no transient immunity spec | Prefer for cost-sensitive designs where 0.02V threshold offset is acceptable and PCB area permits 5-pin layout |
Compared with MAX6466UR23+T, TPS3808G125DBVR lacks open-drain configurability and requires external scaling for 2.3V use, while ADM6315-23ARTZ-RL trades guaranteed transient immunity and ultra-low 1.0µA ICC for marginally better threshold accuracy in a larger package.
Availability
MAX6466UR23+T is available at Aetrix Electronics and suitable for portable medical devices, cellular handsets, industrial data loggers, and wearable health trackers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466UR23+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6461–MAX6466 family was designed specifically for ultra-low-power battery monitoring and µP reset supervision in space- and energy-constrained portable electronics, emphasizing zero external components and guaranteed timing behavior over wide temperature ranges.
FAQ
What is the exact reset threshold voltage of the MAX6466UR23+T?
The MAX6466UR23+T has a factory-set lower trip threshold (VTH−) of 2.300V with ±2.5% accuracy over the full −40°C to +125°C operating range. Its upper trip threshold (VTH+) is 2.415V (2.300V × 1.05), providing 5% hysteresis to prevent output oscillation near the threshold crossing point. This value is confirmed in Table 1a of the official Maxim datasheet.
Does the MAX6466UR23+T require external components to function?
No, the MAX6466UR23+T requires no external components for basic supervisory operation. Its precision bandgap reference, comparator, and trimmed resistor network are fully integrated. Only an external pull-up resistor is needed on the open-drain OUT pin to establish the high-state logic level - typically 10kΩ to 3.3V or 5V - as specified in the Applications Information section of the MAX6466UR23+T datasheet.
What is the minimum reset timeout period of the MAX6466UR23+T?
The MAX6466UR23+T guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+. This is a fixed internal timer characteristic of the MAX6464–MAX6466 subgroup and is independent of external capacitance or resistance. The actual timeout varies from 150ms to 430ms depending on temperature and process variation, as documented in the Electrical Characteristics table.
Can the MAX6466UR23+T interface with a 1.8V microcontroller I/O pin?
Yes, the MAX6466UR23+T's open-drain active-low output can interface directly with a 1.8V microcontroller I/O pin. Connect the OUT pin to the µP's reset input through a pull-up resistor to 1.8V. When asserted, OUT sinks current and pulls the node to ≤0.4V (guaranteed at VCC ≥4.5V), satisfying 1.8V logic low thresholds. Leakage current is only 100nA when deasserted, ensuring minimal loading.
Is the MAX6466UR23+T qualified for automotive applications?
The MAX6466UR23+T is specified and tested over −40°C to +125°C and packaged in RoHS-compliant lead-free SOT23-3, making it suitable for under-hood and infotainment applications where AEC-Q100 qualification is not mandated. While not officially AEC-Q100 certified, its temperature rating, transient immunity, and long-term reliability data align with Tier-2 automotive subsystem requirements per Maxim's application guidance for the MAX6461–MAX6466 family.
MAX6466UR23+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:
- 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:
- SOT-23-3
MAX6466UR23+T FAQ
1.How can I place an order for MAX6466UR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466UR23+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 MAX6466UR23+T reliable?
The price and inventory of MAX6466UR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466UR23+T is usually 5 days.
3.What payment methods are accepted for MAX6466UR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466UR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466UR23+T?
MAX6466UR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466UR23+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 MAX6466UR23+T?
For technical support, including MAX6466UR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466UR23+T requirements.
6.How does Aetrix verify that MAX6466UR23+T is sourced from the original manufacturer or authorized distributors?
All MAX6466UR23+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 MAX6466UR23+T meets industry standards.
7.What is the process for return or replacement of MAX6466UR23+T?
All MAX6466UR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466UR23+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 MAX6466UR23+T part is unused and in its original packaging.
Return procedure for MAX6466UR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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