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Analog Devices Inc./Maxim Integrated MAX6466XR26+T
- Part No.:
- MAX6466XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR26+T.pdf
- Description:
- IC VOLT DETECTOR LP SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,889
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Product details
Overview
MAX6466XR26+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low output, 2.6V lower trip threshold (VTH−), 150ms minimum reset timeout period, ±2.5% threshold accuracy over −40°C to +125°C, and 1.0µA supply current at 3.6V - used for reliable power-on reset and brownout detection in battery-powered medical sensors.
For engineers reviewing the MAX6466XR26+T datasheet, MAX6466XR26+T pinout, MAX6466XR26+T application, or MAX6466XR26+T equivalent, key selection considerations include its factory-trimmed 2.6V detection point, guaranteed 150ms reset assertion time after VCC recovery, SC70-3 package footprint, and immunity to sub-20µs voltage transients per threshold overdrive.
Technical Context
The MAX6466XR26+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 2.600V (±2.5%) and VTH+ = 2.730V (5% hysteresis), ensuring stable reset assertion during supply ramp-up and release during brownout recovery. Its open-drain output requires an external pullup and sinks ≥1mA at VOL ≤ 0.4V when asserted.
Unlike the MAX6461–MAX6463 voltage detectors, the MAX6466XR26+T belongs to the µP supervisory subgroup and guarantees a minimum 150ms reset timeout after VCC exceeds VTH+, independent of propagation delay. It operates across full industrial temperature range (−40°C to +125°C) with no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH− Threshold | 2.600V ±2.5% (min 2.535V, max 2.665V at −40°C to +125°C) - sets precise brownout detection level for 2.7V Li-ion systems |
| Reset Timeout | 150ms minimum - ensures microcontroller remains held in reset long enough for power stabilization and clock settling |
| Supply Current | 1.0µA typical at 3.6V - enables multi-year operation on coin-cell batteries without compromising supervision reliability |
| Output Type | Open-drain, active-low - allows level-shifting via external pullup to logic rails up to 6V, isolating reset domain from VCC |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - prevents output chatter near threshold during slow-ramping or noisy supplies |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive sensors and portable medical devices requiring extended thermal margin |
| Transient Immunity | Immune to falling VCC glitches <20µs at 100mV overdrive - rejects noise without false resets in EMI-prone environments |
Pinout & Package
MAX6466XR26+T 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 - compatible with standard SC70 pick-and-place tooling and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain active-low output | Sinks current when VCC < VTH−; requires external pullup resistor to define logic-high voltage and drive strength |
| 2 (GND) | Analog and digital ground reference | Must be connected directly to low-impedance system ground plane to maintain threshold accuracy and noise immunity |
| 3 (VCC) | Supply input and monitored voltage rail | Both powers the device and serves as the sensed voltage source - no separate sense pin required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA supply current enables >10-year battery life in always-on wearable monitors |
| Factory-trimmed VTH− | 2.600V threshold eliminates calibration effort and reduces BOM count vs. discrete resistor-divider solutions |
| Guaranteed tRP | 150ms minimum reset timeout satisfies ARM Cortex-M boot timing requirements without external RC timing |
| 5% internal hysteresis | Eliminates need for external hysteresis resistors and prevents oscillation during marginal supply conditions |
| SC70-3 footprint | 2.0mm × 2.1mm body size supports high-density PCB layouts in hearing aids and implantable sensor modules |
Applications
| Precision Battery Monitoring | Load Switching/Power Sequencing |
|---|---|
Use Scenario: Real-time monitoring of single-cell Li-ion voltage in portable ECG patch to trigger low-battery alert before shutdown. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to MCU when cell voltage drops below 2.6V, holding reset until voltage recovers to ≥2.73V and sustains for ≥150ms. Use Value: Prevents data corruption during brownout by guaranteeing clean reset assertion and eliminating reliance on software-based voltage polling. |
Use Scenario: Enabling controlled power-up sequence for analog front-end and digital baseband in handheld ultrasound probe. IC Role / Device Role / Timing Role: Reset supervisor generating 150ms minimum hold time to ensure LDOs stabilize and clocks lock before firmware execution begins. Use Value: Replaces discrete RC network and Schmitt trigger, reducing component count by 4 parts while improving timing repeatability across temperature. |
| Noise-Immune µP Reset Circuits | Portable Medical Devices |
Use Scenario: Providing glitch-resistant reset signal to ARM Cortex-M4 in MRI-compatible patient monitor exposed to strong EMI fields. IC Role / Device Role / Timing Role: Open-drain output tied to 3.3V pullup, asserting reset only on sustained VCC drop >20µs - rejecting fast transients induced by RF pulses. Use Value: Achieves >60dB noise rejection at 1MHz without ferrite beads or additional filtering, simplifying EMC design. |
Use Scenario: Supervising main 3.3V rail in Class II FDA-cleared glucose meter operating from CR2032 coin cell. IC Role / Device Role / Timing Role: Ultra-low 1.0µA quiescent current extends battery service life to 36 months while maintaining accurate 2.6V undervoltage detection. Use Value: Meets IEC 62304 SOUP requirements for deterministic reset behavior and eliminates field failures due to premature brownout release. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G125DBVR | Fixed 1.25V threshold, 200ms timeout, 2.5µA ICC, SOT23-5 package | Requires external resistor divider for 2.6V detection; larger footprint and higher current draw | Select when needing longer timeout or compatibility with TI-design ecosystems; not drop-in for 2.6V SC70-3 layout |
| ADM6315-26ARTZ-R7 | 2.63V threshold, 140ms timeout, 1.5µA ICC, SOT23-3 package | Lower hysteresis (2.5%), tighter temp drift (±1.5%), but shorter timeout violates 150ms min requirement | Acceptable where 140ms is sufficient; verify MCU boot timing margins before substitution |
Compared with TPS3808G125DBVR and ADM6315-26ARTZ-R7, the MAX6466XR26+T delivers exact 2.6V detection in SC70-3 with lowest ICC and guaranteed 150ms timeout - making it optimal for space- and power-constrained medical and portable designs where timing compliance is critical.
Availability
MAX6466XR26+T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered instrumentation, and automotive cabin sensors requiring stable component supply with full -40°C to +125°C qualification and lead-free compliance.
Supply support for MAX6466XR26+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 - emphasizing ultra-low power, high accuracy, and robust operation in harsh environments.
The MAX6461–MAX6466 family was engineered specifically for battery-critical systems requiring deterministic reset behavior without external components - targeting portable healthcare, industrial IoT edge nodes, and automotive subsystems.
FAQ
What is the exact VTH− threshold voltage of the MAX6466XR26+T?
The MAX6466XR26+T has a factory-trimmed lower trip threshold (VTH−) of 2.600V at +25°C, with guaranteed range of 2.535V to 2.665V across −40°C to +125°C per ±2.5% accuracy specification. This value is fixed and non-adjustable, matching the "26" suffix in the part number per Table 1a of the datasheet.
Does the MAX6466XR26+T require external components to function?
No, the MAX6466XR26+T operates autonomously with no external components required. Its precision bandgap reference, comparator, and trimmed resistor network are fully integrated. Only an external pullup resistor on the open-drain OUT pin is needed to define the logic-high voltage level - this is mandatory for proper reset signaling.
What is the minimum reset timeout period specified for the MAX6466XR26+T?
The MAX6466XR26+T guarantees a minimum reset timeout period (tRP) of 150ms, measured from the moment VCC rises above VTH+ until the OUT pin releases (goes high-impedance). This parameter is independent of propagation delay and ensures sufficient hold time for microcontroller initialization and clock stabilization.
Can the MAX6466XR26+T be used with a VCC supply below 1.6V?
No - the MAX6466XR26+T is specified for operation only within VCC = +1.6V to +5.5V. Below 1.6V, output sinking capability degrades significantly, and the device may not assert reset reliably. The absolute minimum operating voltage is 1.2V per Absolute Maximum Ratings, but functional operation is not guaranteed below 1.6V.
How does the 5% internal hysteresis of the MAX6466XR26+T improve system reliability?
The 5% internal hysteresis (VTH+ = VTH− × 1.05 = 2.730V) creates distinct turn-on and turn-off thresholds, preventing output oscillation when VCC lingers near 2.6V due to load transients or ripple. This eliminates false resets and ensures clean, monotonic reset assertion and release - critical for deterministic firmware startup.
MAX6466XR26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- 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+T FAQ
1.How can I place an order for MAX6466XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR26+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 MAX6466XR26+T reliable?
The price and inventory of MAX6466XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR26+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR26+T?
MAX6466XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR26+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 MAX6466XR26+T?
For technical support, including MAX6466XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR26+T requirements.
6.How does Aetrix verify that MAX6466XR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR26+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 MAX6466XR26+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR26+T?
All MAX6466XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR26+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 MAX6466XR26+T part is unused and in its original packaging.
Return procedure for MAX6466XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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