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Analog Devices Inc./Maxim Integrated MAX6466UR46+T
- Part No.:
- MAX6466UR46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6466UR46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:861
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Product details
Overview
MAX6466UR46+T from Maxim Integrated is a micropower supervisory circuit with 4.6V lower trip threshold (VTH− = 4.600V typ), 150ms minimum reset timeout, and open-drain active-low output in SOT23-3 package. It monitors system supply voltage, asserts reset during brownout, and holds reset for ≥150ms after recovery-enabling reliable µP initialization in battery-powered medical devices and portable instrumentation.
For engineers reviewing the MAX6466UR46+T datasheet, MAX6466UR46+T pinout, MAX6466UR46+T application, or MAX6466UR46+T equivalent, key selection criteria include guaranteed 150ms timeout at −40°C to +125°C, ±2.5% threshold accuracy over temperature, ultra-low 1.0µA supply current at 3.6V, and immunity to sub-20µs VCC transients.
Technical Context
The MAX6466UR46+T implements a precision bandgap reference and comparator with internally trimmed resistor network to set VTH− = 4.600V (±2.5% over −40°C to +125°C) and VTH+ = 4.830V (5% hysteresis). Its open-drain output requires an external pullup and sinks ≥1mA at 0.4V with VCC ≥ 4.5V.
This device belongs to the MAX6464–MAX6466 subgroup, distinguished by fixed 150ms minimum reset timeout (tRP), unlike the MAX6461–MAX6463 voltage detectors which have 17µs propagation delay and no timeout. All variants operate from 1.2V to 6.0V supply and are specified across automotive-grade temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 6.0V - supports direct monitoring of Li+ battery (3.0–4.2V), 3.3V/5V rails, and post-regulator outputs without external scaling. |
| Lower Threshold (VTH−) | 4.600V (±2.5% over −40°C to +125°C) - precisely triggers reset when 5V system drops below 4.6V, preventing unstable µP operation. |
| Reset Timeout Period | 150ms min - ensures µP completes power-on reset sequence before releasing reset, meeting ARM Cortex-M and PIC timing requirements. |
| Supply Current | 1.0µA at 3.6V, −40°C to +125°C - enables >10-year battery life in coin-cell–powered IoT sensors and portable diagnostics. |
| Output Type | Open-drain, active-low - allows level-shifting via external pullup to 1.8V/2.5V/3.3V logic, isolating reset domain from VCC domain. |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - prevents output chatter during slow-rising/falling VCC transitions near 4.6V threshold. |
| Transient Immunity | Immune to ≤18µs glitches at 4.5V overdrive - rejects noise spikes from DC/DC switching without false resets. |
Pinout & Package
SOT23-3 package: 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain reset output | Asserts low during VCC < VTH−; requires external pullup resistor (typically 10–100kΩ) to host logic rail; sinks ≥1mA at 0.4V. |
| 2 - GND | Ground reference | Must be connected directly to system ground plane; serves as return path for internal bandgap and comparator circuits. |
| 3 - VCC | Supply and monitored input | Single pin supplies device and provides voltage under supervision; no external divider needed for 4.6V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA at 3.6V - reduces standby power in always-on medical monitors and wearable ECG units. |
| Factory-trimmed 4.6V threshold | ±2.5% accuracy over full −40°C to +125°C range - eliminates calibration overhead in industrial handheld testers. |
| Guaranteed 150ms reset timeout | Valid from −40°C to +125°C - satisfies JEDEC JESD78 latch-up immunity and MIL-STD-704 voltage sag recovery timing. |
| Internal 5% hysteresis | Prevents oscillation during slow VCC ramp-up (e.g., battery charging circuits), eliminating need for external RC networks. |
| Open-drain output architecture | Enables reset signal translation to lower-voltage logic domains (e.g., 1.8V FPGA I/O) without level translators. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, operating 3 years between replacements. IC Role / Device Role / Timing Role: Supervisory circuit asserting /RESET during battery voltage decay below 4.6V and holding it for ≥150ms to ensure clean µC boot. Use Value: Prevents firmware corruption during brownout by guaranteeing reset assertion until stable 3.3V rail is established post-battery replacement. |
Use Scenario: Environmental data logger deployed in remote field sites, powered by Li-SOCl₂ primary battery. IC Role / Device Role / Timing Role: Monitors main 3.6V supply and forces controlled shutdown when voltage falls below 4.6V threshold. Use Value: Enables safe flash memory write completion and EEPROM state save before power loss, avoiding data corruption. |
| Industrial Handheld Testers | Low-Power IoT Edge Nodes |
|
Use Scenario: Battery-operated multimeter with auto-ranging analog front-end and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for dual-core ARM Cortex-M4/M0+ SoC. Use Value: Ensures deterministic boot sequence across −20°C to +70°C operating range, meeting IEC 61000-4-2 ESD immunity requirements. |
Use Scenario: Wireless vibration sensor node harvesting energy from piezoelectric transducer, storing charge in supercapacitor. IC Role / Device Role / Timing Role: Detects capacitor voltage crossing 4.6V threshold to enable MCU wake-up and sensor sampling. Use Value: Delivers precise turn-on point with no external components, reducing BOM count and PCB area in space-constrained nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466XR46+T | SC70-3 package (1.25mm × 2.0mm), same electrical specs and 4.6V threshold. | Preferred for ultra-dense layouts where 0.25mm shorter body and 0.1mm lower profile reduce routing congestion. | Select when board real estate is constrained and reflow compatibility with SC70 footprint is confirmed. |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.8µA ICC, SOT23-5 package with manual reset input. | Requires external resistor divider for 4.6V monitoring; adds manual reset capability not present in MAX6466UR46+T. | Choose only if system requires pushbutton-initiated reset or tolerance for ±3% threshold accuracy is acceptable. |
Compared with MAX6466XR46+T, the MAX6466UR46+T offers identical supervision functionality in a slightly larger but more thermally robust SOT23-3 package; versus TPS3808G33DBVR, it delivers exact 4.6V threshold without external components and cuts supply current by 44%, critical for multi-year battery life.
Availability
MAX6466UR46+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial handheld testers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466UR46+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 high-reliability, low-power solutions.
The MAX6461–MAX6466 family targets cost-sensitive, space-constrained systems needing dependable power-monitoring without external components-especially portable, battery-operated, and automotive-qualified equipment.
FAQ
What is the exact lower threshold voltage (VTH−) of the MAX6466UR46+T and how accurate is it over temperature?
The MAX6466UR46+T has a factory-set lower threshold of 4.600V (typical at +25°C), with guaranteed accuracy of ±2.5% across the full −40°C to +125°C operating range. This means VTH− remains between 4.485V and 4.715V under all specified conditions, ensuring consistent brownout detection in automotive and industrial environments.
Does the MAX6466UR46+T provide a reset timeout, and what is its minimum duration?
Yes, the MAX6466UR46+T is a µP supervisory circuit with a guaranteed minimum reset timeout period of 150ms. This timeout begins when VCC rises above VTH+ (≈4.83V) and ensures /RESET remains asserted for at least 150ms, satisfying boot timing requirements for most 8-/16-/32-bit microcontrollers including STM32, MSP430, and PIC families.
What output configuration does the MAX6466UR46+T use, and what external components are required?
The MAX6466UR46+T features an open-drain, active-low output (pin 1). It requires only one external component: a pullup resistor (typically 10–100kΩ) connected between OUT and the target logic rail (e.g., 1.8V, 3.3V, or 5V). No capacitors, resistors for threshold setting, or additional biasing are needed-reducing BOM count and layout complexity.
How much supply current does the MAX6466UR46+T consume, and how does it vary with voltage and temperature?
The MAX6466UR46+T draws just 1.0µA typical supply current at 3.6V and −40°C to +125°C. At 5.0V and +25°C, consumption is 1.3µA (max), rising to 3.5µA at +125°C. This ultra-low, predictable current enables decade-long operation from coin cells and simplifies power budgeting in energy-harvesting systems.
Can the MAX6466UR46+T be used to monitor a 5V rail, and what happens during brief voltage dips?
Yes, the MAX6466UR46+T is specifically designed to monitor nominal 5V supplies: its 4.6V threshold provides 400mV headroom before reset assertion. It is immune to transients ≤18µs (at 4.5V overdrive), rejecting common switching regulator noise and ESD-induced sags without false triggering-ensuring robust operation in noisy industrial settings.
MAX6466UR46+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:
- 4.6V
- 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
MAX6466UR46+T FAQ
1.How can I place an order for MAX6466UR46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466UR46+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 MAX6466UR46+T reliable?
The price and inventory of MAX6466UR46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466UR46+T is usually 5 days.
3.What payment methods are accepted for MAX6466UR46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466UR46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466UR46+T?
MAX6466UR46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466UR46+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 MAX6466UR46+T?
For technical support, including MAX6466UR46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466UR46+T requirements.
6.How does Aetrix verify that MAX6466UR46+T is sourced from the original manufacturer or authorized distributors?
All MAX6466UR46+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 MAX6466UR46+T meets industry standards.
7.What is the process for return or replacement of MAX6466UR46+T?
All MAX6466UR46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466UR46+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 MAX6466UR46+T part is unused and in its original packaging.
Return procedure for MAX6466UR46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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