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Analog Devices Inc./Maxim Integrated MAX6466XR26+
- Part No.:
- MAX6466XR26+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR26+.pdf
- Description:
- MAX6466 ULTRA-LOW-POWER VOLTAGE
- Quantity:
- Payment:
- Shipping:
Inventory:774
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Product details
Overview
MAX6466XR26+ from Maxim Integrated is a micropower supervisory circuit with open-drain active-low reset output, factory-set 2.60V lower trip threshold (VTH−), ±2.5% threshold accuracy over −40°C to +125°C, 150ms minimum reset timeout period, and 1.0µA supply current at 3.6V. It monitors system VCC in battery-powered portable medical devices and low-voltage microcontroller systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6466XR26+ datasheet, MAX6466XR26+ pinout, MAX6466XR26+ application, or MAX6466XR26+ equivalent, key selection criteria include its 2.60V threshold tolerance, 150ms guaranteed timeout, SC70-3 package footprint, open-drain output compatibility with mixed-voltage logic, and immunity to sub-20µs VCC transients at 2.6V overdrive.
Technical Context
The MAX6466XR26+ implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 2.60V (±2.5%) and VTH+ = VTH− × 1.05 = 2.73V. Its internal hysteresis prevents chatter during slow-rising/falling supply transitions near threshold.
As a member of the MAX6464–MAX6466 µP supervisory subgroup, it asserts reset for ≥150ms after VCC rises above VTH+, ensuring stable processor initialization. The open-drain output requires an external pullup and supports interfacing to logic supplies up to 6V independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH−) | 2.60V ±2.5% over −40°C to +125°C - ensures accurate brownout detection at nominal 2.6V rails without calibration. |
| Reset Timeout Period | 150ms minimum - guarantees sufficient hold time for microcontroller reset sequencing and clock stabilization. |
| Supply Current | 1.0µA at 3.6V - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Output Type | Open-drain, active-low - allows flexible voltage translation via external pullup to 1.8V/3.3V/5V logic domains. |
| Hysteresis | 5% (VTH+ = 2.73V) - eliminates false resets during noisy or slowly recovering power rails. |
| Propagation Delay | Falling edge: 17µs typical - provides fast response to undervoltage events while maintaining noise immunity. |
| Operating Temperature | −40°C to +125°C - supports automotive under-hood, industrial control, and portable medical environments. |
Pinout & Package
MAX6466XR26+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), 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 active-low reset output | Asserts low when VCC < 2.60V; requires external pullup resistor; sinks ≥1mA at 0.4V for 4.5V VCC. |
| 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 and monitored voltage | Accepts 1.2V–6.0V; powers internal bandgap and comparator; monitored for threshold violation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA at 3.6V - extends battery life in wearable sensors and implantable diagnostics. |
| Factory-trimmed threshold | 2.60V ±2.5% - eliminates external resistor networks and calibration steps in production. |
| Guaranteed 150ms reset pulse | Minimum timeout across full temperature range - satisfies ARM Cortex-M and PIC MCU reset timing requirements. |
| Transient immunity | Rejects VCC glitches ≤20µs at 2.6V overdrive - prevents spurious resets in electrically noisy environments. |
| Wide operating voltage | 1.2V to 6.0V VCC - supports Li-ion, alkaline, and regulated 3.3V/5V rails without level-shifting. |
Applications
| Battery-Powered Medical Sensor | Low-Voltage Microcontroller Reset |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable wake-up and reset during battery voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to MSP430FR59xx until VCC exceeds 2.73V and holds for ≥150ms. Use Value: Prevents firmware lockup during cold-start or battery depletion by guaranteeing clean, extended reset assertion. |
Use Scenario: Wearable ECG patch using nRF52832 SoC with 2.6V LDO supply, subject to transient load-induced rail droop. IC Role / Device Role / Timing Role: Open-drain reset generator referenced to local 2.6V rail, pulled up to 3.3V I/O domain. Use Value: Enables safe reset coordination across mixed-voltage subsystems without level translators. |
| Portable Diagnostic Handheld | Industrial Data Logger |
Use Scenario: Battery-backed handheld ultrasound probe with flash memory and analog front-end, requiring deterministic boot sequence. IC Role / Device Role / Timing Role: Brownout detector triggering hardware reset before ADC reference instability occurs below 2.6V. Use Value: Eliminates corrupted sensor data capture during marginal power conditions. |
Use Scenario: Remote environmental logger powered by solar-charged LiFePO₄ (2.5–3.65V range), exposed to wide thermal swings. IC Role / Device Role / Timing Role: High-accuracy supervisory IC maintaining ±2.5% threshold stability from −40°C to +125°C. Use Value: Ensures consistent reset behavior across extreme field deployments without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G125DBVR | 2.5V fixed threshold, 200ms timeout, 1.1µA ICC, SOT23-5 package | Requires 5-pin layout; lacks SC70-3 footprint; tighter 1.5% threshold accuracy but no 2.6V option | Select when higher accuracy and longer timeout are prioritized over board area and exact 2.6V match. |
| ADM6315-26ARTZ-R7 | 2.63V threshold, 140ms timeout, 2.5µA ICC, SOT23-3 package | Higher supply current; shorter timeout; same 3-pin footprint but ±3.5% threshold tolerance | Choose for cost-sensitive designs where 140ms timeout suffices and 1.0µA ultra-low ICC is noncritical. |
Compared with TPS3808G125DBVR and ADM6315-26ARTZ-R7, the MAX6466XR26+ uniquely delivers 2.60V threshold accuracy, 150ms timeout, and 1.0µA ICC in the smallest SC70-3 package-making it optimal for space- and energy-constrained portable medical and IoT endpoints.
Availability
MAX6466XR26+ is available at Aetrix Electronics and suitable for portable medical devices, battery-powered sensors, and low-voltage microcontroller systems requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6466XR26+ 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 in industrial, medical, and communications markets.
The MAX6461–MAX6466 family was engineered specifically for ultra-low-power supervisory functions in battery-critical systems, emphasizing nanoscale current consumption, factory-set thresholds, and robust transient immunity without external components.
FAQ
What is the exact reset threshold voltage of the MAX6466XR26+?
The MAX6466XR26+ has a factory-set lower trip threshold (VTH−) of 2.60V with ±2.5% accuracy over −40°C to +125°C, and an upper trip threshold (VTH+) of 2.73V (2.60V × 1.05). These values are confirmed in Table 1a and Table 1b of the official datasheet, and apply specifically to the MAX6466XR26+ variant.
Does the MAX6466XR26+ require external components for basic operation?
No, the MAX6466XR26+ requires no external resistors or capacitors for core supervisory function. Its precision bandgap reference, comparator, and trimmed resistor network are fully integrated. Only an external pullup resistor is needed on the open-drain OUT pin to establish the logic-high level, per the functional diagram and Pin Description section.
What is the minimum reset timeout period guaranteed for the MAX6466XR26+?
The MAX6466XR26+ guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+, with typical values up to 260ms and maximum up to 430ms across temperature. This parameter is explicitly defined in the Electrical Characteristics table under "Output Timeout Period (tRP)" for MAX6464/MAX6465/MAX6466 devices.
Can the MAX6466XR26+ output interface with a 1.8V logic system while powered from a 2.6V supply?
Yes. The MAX6466XR26+ open-drain output supports voltage translation: connect the OUT pin to a 1.8V pullup, and it will assert low (≤0.4V) when active and float to 1.8V when inactive. This capability is documented in the Applications Information section under "Interfacing to Different Logic Voltage Components" and confirmed in the VOH/VOL specifications.
Is the MAX6466XR26+ qualified for automotive temperature range?
Yes. The MAX6466XR26+ is fully specified from −40°C to +125°C, meeting extended industrial and under-hood automotive requirements. This operating range is stated in the Ordering Information table, Absolute Maximum Ratings, and Electrical Characteristics conditions, and applies to all SC70-3 packaged variants including MAX6466XR26+.
MAX6466XR26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.6V
- 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:
- SC-70-3
MAX6466XR26+ FAQ
1.How can I place an order for MAX6466XR26+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR26+ 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 MAX6466XR26+ reliable?
The price and inventory of MAX6466XR26+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR26+ is usually 5 days.
3.What payment methods are accepted for MAX6466XR26+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR26+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR26+?
MAX6466XR26+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR26+ 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 MAX6466XR26+?
For technical support, including MAX6466XR26+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR26+ requirements.
6.How does Aetrix verify that MAX6466XR26+ is sourced from the original manufacturer or authorized distributors?
All MAX6466XR26+ 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 MAX6466XR26+ meets industry standards.
7.What is the process for return or replacement of MAX6466XR26+?
All MAX6466XR26+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR26+, 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 MAX6466XR26+ part is unused and in its original packaging.
Return procedure for MAX6466XR26+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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