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Analog Devices Inc./Maxim Integrated MAX6463UR35+T
- Part No.:
- MAX6463UR35+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6463UR35+T.pdf
- Description:
- IC VOLT DETECTOR LP SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,835
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Product details
Overview
MAX6463UR35+T from Maxim Integrated is a precision ultra-low-power voltage detector with active-low open-drain output, 3.5V nominal trip threshold (VTH− = 3.448V min / 3.500V typ at +25°C), ±2.5% threshold accuracy over −40°C to +125°C, and 17µs propagation delay. It monitors VCC supply voltage in battery-powered systems and asserts OUT low when VCC falls below VTH−, remaining asserted until VCC rises above VTH+ (3.603V typ).
For engineers reviewing the MAX6463UR35+T datasheet, MAX6463UR35+T pinout, MAX6463UR35+T application, or MAX6463UR35+T equivalent, key selection criteria include its 1.0µA supply current at 3.6V, internal 5% hysteresis, SC70-3/SOT23-3 package compatibility, and immunity to short voltage transients-critical for reliable reset supervision in portable medical devices and low-voltage microcontroller systems.
Technical Context
The MAX6463UR35+T implements a precision bandgap reference and comparator-based detection architecture with internally trimmed resistor networks to set fixed VTH−/VTH+ thresholds. Its open-drain output requires an external pullup and supports logic-level interfacing independent of VCC (0–6V).
It features built-in 5% hysteresis (VHYST = [(VTH+) − (VTH−)] / VTH− × 100%), ensuring stable output during supply voltage fluctuations near threshold. No external components are needed for basic operation, and it remains functional down to VCC = 1.2V with guaranteed performance across −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.0µA at VCC = 3.6V, TA = −40°C to +125°C - enables multi-year battery life in always-on monitoring applications. |
| Voltage Threshold (VTH−) | 3.448V (min) / 3.500V (typ) at +25°C - precisely matches 3.3V system rail monitoring with 5% hysteresis margin. |
| Threshold Accuracy | ±2.5% over −40°C to +125°C - eliminates need for calibration in automotive or industrial environments. |
| Propagation Delay | 17µs (VCC falling at 10mV/µs) - ensures fast response to brownout events without false triggering. |
| Output Type | Active-low open-drain - allows level-shifting and wired-OR reset bus configurations with external pullup. |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - prevents output chatter during slow-rising/falling supply transitions. |
| Operating Voltage Range | 1.2V to 6.0V - supports direct monitoring of Li+ cells (2.7–4.2V), 3.3V, and 5V rails without external scaling. |
Pinout & Package
MAX6463UR35+T is housed in a 3-pin SOT23-3 package (lead-free, RoHS-compliant), with identical pinout to SC70-3 variants. The package measures 2.92mm × 1.6mm × 1.1mm and is rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain output | Asserts low when VCC < VTH−; requires external pullup resistor (typically 10–100kΩ) to interface with µP reset input or logic gate. |
| 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 and monitored input | Single pin serves as both power source and voltage sense node - no separate VIN required; monitors its own supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA at 3.6V enables >10-year coin-cell operation in wireless sensors and wearables. |
| Preset 3.5V threshold | Factory-trimmed VTH− = 3.500V (±2.5%) eliminates external resistor divider and calibration effort. |
| Internal 5% hysteresis | Guarantees clean, chatter-free output transition without external hysteresis network. |
| No external components | Self-contained detection circuit reduces BOM count, PCB area, and design validation time. |
| Transient immunity | Rejects sub-20µs VCC glitches (e.g., switching noise, ESD-induced dips) per Typical Operating Characteristics. |
Applications
| Portable Medical Sensors | Battery-Powered IoT Endpoints |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable low-voltage detection before sensor data corruption occurs. IC Role / Device Role: Voltage detector asserting reset to MCU when battery drops below 3.5V, halting measurement and enabling graceful shutdown. Use Value: 1.0µA quiescent current extends battery life beyond 24 months; ±2.5% threshold accuracy ensures consistent shutdown voltage across temperature extremes. |
Use Scenario: LoRaWAN soil moisture node operating on two AA alkaline cells (1.8–3.2V range), needing precise undervoltage lockout before radio transmission fails. IC Role / Device Role: Monitors combined cell stack voltage and disables MCU peripherals via open-drain reset signal when VCC falls below 3.448V. Use Value: Open-drain output allows shared reset bus across multiple ICs; 17µs delay ensures timely intervention before brownout-induced firmware crash. |
| Industrial Handheld Scanners | Wearable Health Trackers |
Use Scenario: Rugged barcode scanner using Li-ion pack (3.0–4.2V), where voltage sag during motor activation must not falsely trigger reset. IC Role / Device Role: Provides hysteresis-stabilized detection to distinguish true low-battery condition from transient motor load dips. Use Value: 5% hysteresis (VTH+ = 3.603V) prevents repeated reset assertion during 100ms motor bursts; −40°C to +125°C rating supports outdoor deployment. |
Use Scenario: Optical heart-rate monitor with optical sensor and BLE SoC, powered by 3.7V LiPo, requiring deterministic shutdown before ADC reference drifts. IC Role / Device Role: Detects VCC decay below 3.5V and pulls µP reset line low to initiate controlled firmware save and sleep sequence. Use Value: SC70-3/SOT23-3 footprint fits tight wearable layouts; 1.2V minimum operating voltage ensures detection even during deep discharge recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB35DBZR | 3.5V threshold, 0.5µA ICC, push-pull active-low output, SOT23-3 package | Lacks open-drain flexibility; cannot interface with higher-voltage logic buses | Select when lowest possible supply current is critical and reset bus sharing is unnecessary. |
| APX803S-35SA-7 | 3.5V threshold, 1.2µA ICC, open-drain active-low, SOT23-3, −40°C to +125°C | Slightly higher supply current; ±3.0% threshold accuracy vs. ±2.5% for MAX6463UR35+T | Choose for cost-sensitive designs where 0.5% accuracy degradation is acceptable. |
Compared with TLV803EB35DBZR and APX803S-35SA-7, MAX6463UR35+T delivers superior threshold accuracy (±2.5% vs. ±3.0% or unspecified), guaranteed 17µs propagation delay, and proven transient immunity-making it preferred for high-reliability portable medical and industrial applications where reset timing and voltage precision are non-negotiable.
Availability
MAX6463UR35+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT endpoints, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6463UR35+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 low-power, high-reliability solutions for demanding environments.
The MAX6461–MAX6466 family was engineered specifically for ultra-low-power voltage monitoring in space-constrained, battery-operated systems-delivering factory-trimmed thresholds, nanoscale supply current, and robust transient immunity without external components.
FAQ
What is the exact voltage threshold of MAX6463UR35+T at room temperature?
The MAX6463UR35+T has a nominal lower trip threshold (VTH−) of 3.500V at +25°C, with a guaranteed minimum of 3.448V and maximum of 3.553V. Its upper threshold (VTH+) is 3.603V typical, calculated as VTH− × 1.05, providing 5% hysteresis to prevent output oscillation near the trip point.
Does MAX6463UR35+T require external components to operate?
No, MAX6463UR35+T operates autonomously with only VCC, GND, and OUT connections. An external pullup resistor is required on the open-drain OUT pin for proper logic-level assertion, but no resistive dividers, capacitors, or trimming components are needed-reducing BOM count and layout complexity.
Can MAX6463UR35+T monitor a voltage rail different from its supply voltage?
No, MAX6463UR35+T monitors its own VCC pin exclusively-it does not support separate VIN/VCC configurations. The device senses the same voltage that powers its internal circuitry, making it ideal for supply rail supervision but unsuitable for monitoring auxiliary or isolated rails without level-shifting circuitry.
What is the maximum transient duration MAX6463UR35+T can ignore at a 3.5V threshold?
Per the Typical Operating Characteristics graph (MAX6461 toc04), MAX6463UR35+T rejects VCC transients up to ~15µs in duration when the overdrive (VTH− − VCC) is 100mV, and down to ~5µs when overdrive reaches 200mV. This immunity prevents false resets caused by switching noise or brief load dumps.
Is MAX6463UR35+T compatible with 1.8V logic systems?
Yes, MAX6463UR35+T's open-drain OUT pin can interface with 1.8V logic when pulled up to 1.8V - its leakage current is ≤100nA when not asserted, and it sinks ≥1.0mA when asserted, meeting standard 1.8V CMOS input requirements. This enables direct connection to low-voltage µPs without level translators.
MAX6463UR35+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 14µs Typical Propagation Delay
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6463UR35+T FAQ
1.How can I place an order for MAX6463UR35+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6463UR35+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 MAX6463UR35+T reliable?
The price and inventory of MAX6463UR35+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6463UR35+T is usually 5 days.
3.What payment methods are accepted for MAX6463UR35+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6463UR35+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6463UR35+T?
MAX6463UR35+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6463UR35+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 MAX6463UR35+T?
For technical support, including MAX6463UR35+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6463UR35+T requirements.
6.How does Aetrix verify that MAX6463UR35+T is sourced from the original manufacturer or authorized distributors?
All MAX6463UR35+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 MAX6463UR35+T meets industry standards.
7.What is the process for return or replacement of MAX6463UR35+T?
All MAX6463UR35+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6463UR35+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 MAX6463UR35+T part is unused and in its original packaging.
Return procedure for MAX6463UR35+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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