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Analog Devices Inc./Maxim Integrated MAX6463XR29+
- Part No.:
- MAX6463XR29+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6463XR29+.pdf
- Description:
- IC VOLT DETECTOR LP SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
MAX6463XR29+ from Maxim Integrated is an ultra-low-power voltage detector IC designed for precision supply monitoring in battery-powered systems. It features a factory-set 2.9V lower trip threshold (VTH−), 5% internal hysteresis, 17µs propagation delay, and 1.0µA supply current at 3.6V - enabling reliable reset assertion in portable medical devices and cellular phones.
For engineers reviewing the MAX6463XR29+ datasheet, MAX6463XR29+ pinout, MAX6463XR29+ application, or MAX6463XR29+ equivalent, key selection considerations include its open-drain active-low output, SC70-3 package, -40°C to +125°C operation, and immunity to short VCC transients without external components.
Technical Context
The MAX6463XR29+ implements a precision bandgap reference and comparator with internally trimmed resistor networks to set its 2.900V (±2.5%) VTH− threshold. Its hysteresis circuit ensures VTH+ = VTH− × 1.05 (≈3.031V), preventing output chatter during slow-rising/falling supply conditions.
As a member of the MAX6461–MAX6466 family, it operates across 1.2V to 6.0V VCC while consuming only 1.0µA typical supply current. Unlike supervisory variants (e.g., MAX6466), it provides no reset timeout - output asserts low on VCC fall below VTH− and releases high when VCC exceeds VTH+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 6.0V - supports Li+ battery (2.7–4.2V), 3.3V, and 5V rails without level-shifting. |
| Threshold Voltage (VTH−) | 2.900V ±2.5% over -40°C to +125°C - enables precise brownout detection for 3.0V nominal systems. |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - eliminates oscillation near threshold during noisy or slowly varying VCC. |
| Propagation Delay | 17µs (typical) - fast response to supply faults, critical for real-time power sequencing. |
| Supply Current | 1.0µA (typical at 3.6V, TA = +25°C) - extends battery life in always-on monitoring applications. |
| Output Type | Open-drain, active-low - allows flexible logic-level interfacing via external pull-up to any voltage ≤6V. |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial embedded environments. |
Pinout & Package
MAX6463XR29+ 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, Pin 2 is GND, and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain output | Asserts low when VCC < VTH−; requires external pull-up for logic-high state; sinks up to 1mA. |
| 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 | Single pin powers device and provides voltage to monitor; no separate sense input required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA enables >10-year battery life in coin-cell-powered IoT sensors. |
| Factory-trimmed threshold | 2.900V ±2.5% eliminates calibration overhead and reduces BOM count. |
| Internal hysteresis | 5% prevents false resets during supply ripple or noise near trip point. |
| Transient immunity | Rejects VCC glitches <15µs (at 2.9V overdrive), improving system robustness in noisy environments. |
| Lead-free SC70-3 package | RoHS-compliant, reflow-solderable footprint compatible with high-density PCB assembly. |
Applications
| Portable Medical Devices | Cellular Phones |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during sleep mode to trigger controlled shutdown before deep discharge. IC Role / Device Role / Timing Role: Voltage detector asserting reset signal to microcontroller when battery drops below 2.9V. Use Value: Prevents data corruption and cell damage by enforcing safe cutoff at precisely 2.9V with ±2.5% accuracy over temperature. |
Use Scenario: Detecting 3.3V system rail collapse during RF transmission bursts. IC Role / Device Role / Timing Role: Open-drain output pulls baseband processor's nRESET line low upon undervoltage. Use Value: 17µs response ensures immediate processor halt before logic errors occur, with no external RC network needed. |
| Load Switching/Power Sequencing | Noise-Immune µP Reset Circuits |
Use Scenario: Enabling/disabling a DC-DC converter based on main supply stability. IC Role / Device Role / Timing Role: Driving gate of external P-MOSFET load switch via pull-up to converter output. Use Value: Open-drain output allows direct interface to 5V converter output, eliminating level translators and reducing component count. |
Use Scenario: Providing glitch-resistant reset to microcontrollers in automotive body control modules. IC Role / Device Role / Timing Role: Supervisory circuit asserting nRESET only after VCC remains above 2.9V for >17µs. Use Value: 5% hysteresis and transient immunity prevent spurious resets caused by engine cranking noise or ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6463UR29+ | SOT23-3 package (2.92mm × 1.3mm); identical electrical specs and SC70 pin-compatible footprint. | Better thermal dissipation (320mW vs. 228.6mW) and higher board-level mechanical robustness. | Select for high-vibration environments or where SOT23 rework infrastructure exists. |
| TLV803EB29DBZR | 2.93V threshold (±1%), 0.5µA ICC, push-pull active-low output; no hysteresis - requires external resistor network. | Lacks integrated hysteresis and transient immunity; needs external components for stable operation. | Choose only if ultra-low current (<0.5µA) dominates design priority and board area permits external R. |
Compared with MAX6463XR29+, MAX6463UR29+ offers identical functionality in a more rugged package but larger footprint, while TLV803EB29DBZR trades integrated hysteresis and simplicity for marginally lower current - making MAX6463XR29+ optimal for space-constrained, noise-prone battery systems requiring zero-component reliability.
Availability
MAX6463XR29+ is available at Aetrix Electronics and suitable for portable medical devices, cellular phones, and load switching applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6463XR29+ 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 semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and connectivity applications.
The MAX6461–MAX6466 family was engineered to replace discrete reset circuits in battery-powered and industrial systems, delivering precision voltage monitoring with zero external components and guaranteed performance across extended temperature ranges.
FAQ
What is the exact voltage threshold of MAX6463XR29+ and how accurate is it over temperature?
The MAX6463XR29+ has a factory-set lower trip threshold (VTH−) of 2.900V at +25°C, with ±2.5% accuracy maintained across the full -40°C to +125°C operating range. This means VTH− stays between 2.828V and 2.973V over temperature, ensuring consistent brownout detection in automotive and industrial environments where thermal drift matters.
Does MAX6463XR29+ include a reset timeout period like some supervisory ICs?
No, MAX6463XR29+ does not include a reset timeout period. It is a pure voltage detector: output asserts low when VCC falls below VTH− and releases high immediately when VCC rises above VTH+ (≈3.031V). For timeout functionality, consider MAX6466XR29+, which adds a minimum 150ms reset pulse after VCC recovery.
Can MAX6463XR29+ interface with a 5V microcontroller while powered from a 3.3V supply?
Yes - MAX6463XR29+ uses an open-drain active-low output, allowing its OUT pin to be pulled up to 5V (or any voltage ≤6V) independently of its 3.3V VCC supply. This enables direct logic-level translation without additional buffers, making it ideal for mixed-voltage systems like baseband processors with 5V I/O and 3.3V core rails.
What is the maximum sink current capability of the MAX6463XR29+ output?
The MAX6463XR29+ open-drain output can sink up to 1.0mA while maintaining VOL ≤0.3V (at VCC ≥1.2V), per the datasheet's Electrical Characteristics table. At higher VCC levels (≥2.5V), it sustains 4.0mA sink with VOL ≤0.3V, supporting direct drive of most microcontroller nRESET inputs and small-signal MOSFET gates.
Is MAX6463XR29+ suitable for use in automotive applications?
Yes - MAX6463XR29+ is specified for -40°C to +125°C operation and qualified for automotive-grade reliability. Its 5% internal hysteresis, 17µs propagation delay, and immunity to short VCC transients make it appropriate for under-dash modules, telematics units, and ADAS subsystems where supply noise and thermal cycling are critical concerns.
MAX6463XR29+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.9V
- 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:
- SC-70-3
MAX6463XR29+ FAQ
1.How can I place an order for MAX6463XR29+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6463XR29+ 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 MAX6463XR29+ reliable?
The price and inventory of MAX6463XR29+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6463XR29+ is usually 5 days.
3.What payment methods are accepted for MAX6463XR29+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6463XR29+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6463XR29+?
MAX6463XR29+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6463XR29+ 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 MAX6463XR29+?
For technical support, including MAX6463XR29+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6463XR29+ requirements.
6.How does Aetrix verify that MAX6463XR29+ is sourced from the original manufacturer or authorized distributors?
All MAX6463XR29+ 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 MAX6463XR29+ meets industry standards.
7.What is the process for return or replacement of MAX6463XR29+?
All MAX6463XR29+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6463XR29+, 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 MAX6463XR29+ part is unused and in its original packaging.
Return procedure for MAX6463XR29+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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