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Analog Devices Inc./Maxim Integrated MAX6464UR29+T
- Part No.:
- MAX6464UR29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6464UR29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,728
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Product details
Overview
MAX6464UR29+T from Maxim Integrated is a micropower supervisory circuit with active-high push-pull output, 2.9V lower trip threshold (VTH−), ±2.5% threshold accuracy over −40°C to +125°C, 150ms minimum reset timeout, and 1.0µA supply current at 3.6V - used for reliable power-on reset assertion in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the MAX6464UR29+T datasheet, MAX6464UR29+T pinout, MAX6464UR29+T application, or MAX6464UR29+T equivalent, key selection criteria include guaranteed 150ms reset pulse width after VCC recovery, internal 5% hysteresis (VTH+ = VTH− × 1.05), lead-free SOT23-3 packaging, and immunity to sub-20µs voltage transients at 2.9V threshold overdrive.
Technical Context
The MAX6464UR29+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 2.900V (±2.5%) and VTH+ = 3.031V (±2.5%), enabling stable reset assertion during brownout and clean release after recovery. Its internal timeout circuit enforces a minimum 150ms active-high reset pulse regardless of VCC rise time.
Designed for ultra-low-power operation, it draws only 1.0µA at 3.6V and remains functional down to VCC = 1.2V. The push-pull output drives high to ≥0.8×VCC at 3mA source current and low to ≤0.3V at 4mA sink current - eliminating need for external pullup resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH−) | 2.900V ±2.5% (−40°C to +125°C); ensures reliable detection of 2.9V supply collapse in Li-ion systems. |
| Upper Trip Voltage (VTH+) | 3.031V ±2.5%; provides 5% hysteresis to prevent chatter near threshold during slow-rising VCC. |
| Reset Timeout Period | 150ms minimum; guarantees processor reset hold time meets ARM Cortex-M and PIC MCU requirements. |
| Supply Current | 1.0µA at 3.6V; enables >10-year battery life in always-on sensor nodes powered by CR2032 cells. |
| Operating Voltage Range | 1.2V to 6.0V; supports direct monitoring of 1.8V, 2.5V, 3.3V, and 5.0V rails without level-shifting. |
| Output Type | Active-high push-pull; drives logic-high reset input directly - no external pullup required. |
| Temperature Range | −40°C to +125°C; qualified for automotive cabin modules and industrial motor controllers. |
Pinout & Package
SOT23-3 package (3-pin, 1.3mm × 2.9mm, 0.95mm height), lead-free, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Reset output | Active-high push-pull; asserts high when VCC < 2.9V and holds high ≥150ms after VCC > 3.031V. |
| 2 - GND | Ground reference | Return path for internal bandgap and comparator; must be connected to system ground plane. |
| 3 - VCC | Supply & monitored input | Single pin supplies device and senses rail voltage; no separate sense input required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA at 3.6V enables multi-year operation on coin-cell batteries in wearable health monitors. |
| Factory-set 2.9V threshold | No external resistors or calibration needed - reduces BOM count and layout area in space-constrained PCBs. |
| 150ms minimum timeout | Guarantees sufficient reset duration for flash programming and PLL lock in microcontrollers. |
| 5% internal hysteresis | Eliminates false resets caused by noise or ripple near 2.9V; VTH+ = 3.031V prevents oscillation. |
| Transient immunity | Rejects glitches ≤18µs wide at 2.9V overdrive - robust against switching regulator noise in portable systems. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with CR2032 battery and low-power BLE SoC. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output; asserts active-high reset to SoC during battery voltage sag below 2.9V. Use Value: Prevents firmware corruption during brownout and ensures full reset recovery before sensor sampling resumes. |
Use Scenario: Environmental data logger using MSP430FR59xx MCU and 3.3V supply. IC Role / Device Role / Timing Role: Generates 150ms+ reset pulse on power-up and brownout to meet MSP430's tPOR requirement. Use Value: Guarantees reliable initialization of FRAM and peripherals without external RC timing components. |
| Industrial Handheld Terminals | Automotive Cabin Sensors |
Use Scenario: Ruggedized barcode scanner operating across −25°C to +70°C ambient. IC Role / Device Role / Timing Role: Monitors 3.3V system rail; provides hysteresis-stabilized reset under cold-start and load-dump conditions. Use Value: Maintains ±2.5% threshold accuracy over full temperature range - avoids spurious resets in field use. |
Use Scenario: Occupancy sensor module in vehicle cabin with 5V supply and CAN interface. IC Role / Device Role / Timing Role: Resets microcontroller if 5V rail drops below 2.9V due to alternator failure or battery drain. Use Value: Ensures fail-safe shutdown and restart within automotive ASIL-B timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 2.93V threshold, 200ms timeout, 1.1µA ICC, SOT23-6 package (6-pin vs. 3-pin). | Requires external pullup for open-drain variant; push-pull version needs different footprint. | Select when longer timeout or dual-voltage monitoring is required; not drop-in due to pin count and layout change. |
| ADM6315-29DARTZ-RL | 2.93V threshold, 200ms timeout, 1.5µA ICC, SC70-4 package; active-low reset output. | Active-low output requires inverter or MCU-compatible reset input; different thermal profile. | Choose for legacy designs requiring active-low assertion; board redesign needed for pinout and signal polarity. |
Compared with MAX6464UR29+T, TPS3808G33DBVR offers longer timeout but demands PCB rework for 6-pin placement, while ADM6315-29DARTZ-RL provides similar accuracy at higher quiescent current and incompatible active-low signaling - neither is pin-compatible, making MAX6464UR29+T optimal for new SOT23-3 designs prioritizing minimal footprint and active-high simplicity.
Availability
MAX6464UR29+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered data loggers, and industrial handheld terminals requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX6464UR29+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 - serving industrial, automotive, and medical markets since 1983.
The MAX6464UR29+T belongs to the MAX6461–MAX6466 supervisory family, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in space- and energy-constrained battery-operated systems.
FAQ
What is the exact reset threshold voltage of the MAX6464UR29+T?
The MAX6464UR29+T has a factory-trimmed lower trip threshold (VTH−) of 2.900V with ±2.5% accuracy over −40°C to +125°C, and an upper trip voltage (VTH+) of 3.031V (VTH− × 1.05). These values are confirmed in Table 1a and Table 1b of the official datasheet, and apply specifically to the MAX6464UR29+T variant.
Does the MAX6464UR29+T require an external pullup resistor?
No - the MAX6464UR29+T features an active-high push-pull output, meaning it actively drives both high and low states. It sources ≥0.8×VCC at 3mA and sinks ≤0.3V at 4mA, eliminating the need for external pullup components unlike open-drain variants such as MAX6466UR29+T.
What is the minimum reset timeout period guaranteed by the MAX6464UR29+T?
The MAX6464UR29+T guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+, as specified in the Electrical Characteristics table. This ensures compatibility with MCUs requiring extended reset hold times, including STM32L4 and Silicon Labs EFM32 series.
Can the MAX6464UR29+T operate from a 1.8V supply rail?
Yes - the MAX6464UR29+T operates across 1.2V to 6.0V, fully specified from −40°C to +125°C. At 1.8V, it maintains 1.0µA supply current and retains ±2.5% threshold accuracy, making it suitable for monitoring low-voltage rails in modern ultra-low-power SoCs.
Is the MAX6464UR29+T pin-compatible with other members of the MAX6461–MAX6466 family in SOT23-3?
Yes - all MAX646xURxx+T variants in SOT23-3 share identical pinout (OUT, GND, VCC) and footprint. However, functionality differs: MAX6464/MAX6465/MAX6466 provide 150ms timeout, while MAX6461/MAX6462/MAX6463 offer 17µs propagation delay without timeout. Electrical behavior is not interchangeable without design review.
MAX6464UR29+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:
- 2.9V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6464UR29+T FAQ
1.How can I place an order for MAX6464UR29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6464UR29+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 MAX6464UR29+T reliable?
The price and inventory of MAX6464UR29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6464UR29+T is usually 5 days.
3.What payment methods are accepted for MAX6464UR29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6464UR29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6464UR29+T?
MAX6464UR29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6464UR29+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 MAX6464UR29+T?
For technical support, including MAX6464UR29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6464UR29+T requirements.
6.How does Aetrix verify that MAX6464UR29+T is sourced from the original manufacturer or authorized distributors?
All MAX6464UR29+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 MAX6464UR29+T meets industry standards.
7.What is the process for return or replacement of MAX6464UR29+T?
All MAX6464UR29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6464UR29+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 MAX6464UR29+T part is unused and in its original packaging.
Return procedure for MAX6464UR29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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