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Analog Devices Inc./Maxim Integrated MAX6808XR26+T
- Part No.:
- MAX6808XR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6808XR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,844
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Product details
Overview
MAX6808XR26+T from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It features a factory-preset 2.6V ±2% reset threshold, active-low open-drain RESET output, and guaranteed operation down to VCC = 1.0V - enabling reliable brownout detection in battery-powered embedded controllers and portable instrumentation.
For engineers reviewing the MAX6808XR26+T datasheet, MAX6808XR26+T pinout, MAX6808XR26+T application, or MAX6808XR26+T equivalent, this device serves as a low-power (35µA typ), single-supply voltage supervisor with hysteresis, SC70-3 packaging, and immunity to fast VCC transients - critical for stable µP reset signaling in space-constrained, low-voltage designs.
Technical Context
The MAX6808XR26+T implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−) to prevent output chatter near the 2.6V threshold. Its open-drain RESET output requires an external pullup and supports interfacing with multiple supply domains up to 6V.
It operates across −40°C to +85°C with supply current stable from 1.0V to 5.5V VCC, and features built-in immunity to negative-going VCC transients ≤100mV overdrive for durations under 100µs - eliminating need for external filtering in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.60V ±2% (VCC falling); ensures reset assertion before system ICs drop below minimum operating voltage |
| Hysteresis | 0.02–0.03 × VTH−; prevents oscillation during slow-rising/falling VCC near threshold |
| Supply Current | 35µA typical at VCC = 3.6V; enables multi-year battery life in always-on monitoring |
| RESET Valid Down To | VCC = 1.0V (open-drain sink active); supports deep brownout detection in Li-ion and coin-cell systems |
| Operating Temp Range | −40°C to +85°C; qualified for industrial and portable equipment environments |
| VCC Absolute Max | 6.0V; allows safe operation with transient overshoot on 5V rails |
| Output Leakage (RESET) | 1µA max at VCC = 5.5V; minimizes pullup resistor power loss and signal loading |
Pinout & Package
MAX6808XR26+T is housed in a 3-pin SC70 package (outline 21-0075), measuring 2.0mm × 2.1mm × 0.95mm, with moisture sensitivity level (MSL) 1 and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain output; must be pulled up externally to define logic-high level and drive load |
| 2 | GND | Analog ground reference; requires low-impedance connection to system ground plane |
| 3 | VCC | Power supply input; accepts 1.0V–5.5V; decoupling capacitor recommended within 1cm |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.6V threshold | ±2% accuracy eliminates calibration components and reduces BOM count |
| Open-drain RESET output | Enables wired-OR reset buses and mixed-voltage system interfacing (e.g., 3.3V µP with 5V pullup) |
| 1.0V VCC operational floor | Guarantees valid reset assertion through full discharge of single-cell Li-ion (2.5–4.2V) and alkaline (0.9–1.5V/cell) batteries |
| 35µA supply current | Reduces quiescent power by >90% vs. discrete resistor-zener solutions, critical for energy harvesting nodes |
| Internal hysteresis | Prevents false resets during slow power-rail ramp-up or noise-induced threshold crossings |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch monitoring battery voltage while sampling biopotentials. IC Role / Device Role / Timing Role: Voltage detector asserting reset when Li-ion drops below 2.6V to halt analog front-end and preserve flash data integrity. Use Value: Prevents corrupted memory writes during brownout by triggering controlled shutdown before VCC falls below MCU's 1.8V core requirement. |
Use Scenario: DIN-rail mounted digital input module powered from 24VDC converted to 3.3V via buck regulator. IC Role / Device Role / Timing Role: Supervisory IC monitoring post-regulation 3.3V rail to detect converter failure or overload collapse. Use Value: Provides sub-30µs reset assertion delay, ensuring deterministic fault response faster than watchdog timeout cycles. |
| Barcode Scanner Handhelds | Smart Energy Meters |
Use Scenario: Battery-operated laser scanner experiencing rapid VCC sag during motor activation. IC Role / Device Role / Timing Role: Immune voltage supervisor detecting true brownout (not transient) using hysteresis and 100µs transient rejection window. Use Value: Eliminates spurious reboots during high-current pulses, improving scan reliability without adding RC filters. |
Use Scenario: Revenue-grade meter with isolated RS-485 interface and real-time clock backed by supercapacitor. IC Role / Device Role / Timing Role: Reset generator monitoring main 3.3V supply to initiate RTC backup switchover before VCC crosses 2.6V. Use Value: Coordinates power-fail interrupt and nonvolatile register save with <100µs timing margin relative to supply collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G26DBVR | 2.6V threshold, push-pull active-low RESET, 1.4µA quiescent current, no hysteresis auto-enable | Lower IQ ideal for ultra-low-power wake-on-event systems; lacks transient immunity specs | Select when minimal current draw outweighs need for guaranteed transient rejection |
| ADM6315-26ARTZ-R7 | 2.63V threshold, open-drain active-low RESET, 12µA IQ, fixed 200ms reset timeout | Includes fixed delay; incompatible where immediate reset assertion is required (e.g., µP with no internal POR) | Choose only if system requires guaranteed minimum reset pulse width after VCC recovery |
Compared with TPS3808G26DBVR and ADM6315-26ARTZ-R7, the MAX6808XR26+T uniquely combines open-drain flexibility, 35µA IQ, ±2% threshold accuracy, and documented immunity to 100µs/100mV VCC transients - making it optimal for cost-sensitive, space-constrained, and noise-prone embedded supervisors without timeout requirements.
Availability
MAX6808XR26+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, barcode scanner handhelds, and smart energy meters requiring stable component supply and long-term manufacturability.
Supply support for MAX6808XR26+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and communications applications.
The MAX6806/MAX6807/MAX6808 family was designed specifically for accurate, low-power supply monitoring in microprocessor and microcontroller systems - prioritizing threshold precision, small footprint, and robustness against real-world power-rail disturbances.
FAQ
What is the exact reset threshold voltage of the MAX6808XR26+T?
The MAX6808XR26+T has a factory-preset nominal reset threshold of 2.60V with ±2% accuracy over temperature (−40°C to +85°C). At +25°C, the guaranteed range is 2.548V to 2.652V for VCC falling, and hysteresis adds ~52mV to the rising threshold (VTH+).
Does the MAX6808XR26+T require an external pullup resistor on the RESET pin?
Yes, the MAX6808XR26+T features an open-drain RESET output and requires an external pullup resistor. A 100kΩ resistor to any supply up to 6V is sufficient for high-impedance loads; lower values (e.g., 10kΩ) may be used for faster rise times or higher capacitive loads.
Can the MAX6808XR26+T operate reliably below 1.8V VCC?
Yes - the MAX6808XR26+T is fully specified down to VCC = 1.0V. Its RESET output remains functional (sinking current) across this entire range, enabling brownout detection in single-cell alkaline, NiMH, or deeply discharged Li-ion systems where other supervisors fail.
How does the MAX6808XR26+T handle power-supply transients?
The MAX6808XR26+T is immune to short negative-going VCC transients: it will not assert reset for pulses ≤100µs duration when overdrive (VTH− − VCC) is ≤100mV. This eliminates need for additional RC filtering in electrically noisy environments like motor-driven portable equipment.
Is the MAX6808XR26+T pin-compatible with other packages in the MAX680x family?
No - the MAX6808XR26+T uses a 3-pin SC70 package. While the 8-pin µMAX and SO packages share pin compatibility with MC33064-series devices, the SC70 variant has unique pinout (RESET/GND/VCC) and is not interchangeable with SOT23, SOT143, or µMAX footprints without PCB redesign.
MAX6808XR26+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:
- 4.6V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 30µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6808XR26+T FAQ
1.How can I place an order for MAX6808XR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808XR26+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 MAX6808XR26+T reliable?
The price and inventory of MAX6808XR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808XR26+T is usually 5 days.
3.What payment methods are accepted for MAX6808XR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808XR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808XR26+T?
MAX6808XR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808XR26+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 MAX6808XR26+T?
For technical support, including MAX6808XR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808XR26+T requirements.
6.How does Aetrix verify that MAX6808XR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6808XR26+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 MAX6808XR26+T meets industry standards.
7.What is the process for return or replacement of MAX6808XR26+T?
All MAX6808XR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808XR26+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 MAX6808XR26+T part is unused and in its original packaging.
Return procedure for MAX6808XR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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