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Analog Devices Inc./Maxim Integrated MAX6808XR26
- Part No.:
- MAX6808XR26
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6808XR26.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,359
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Product details
Overview
MAX6808XR26 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 instrumentation and portable equipment.
For engineers reviewing the MAX6808XR26 datasheet, MAX6808XR26 pinout, MAX6808XR26 application, or MAX6808XR26 equivalent, key selection criteria include its open-drain output topology for bidirectional µP reset interfaces, low 35µA supply current, and SC70-3 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6808XR26 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 resistor and supports interfacing to multiple supply domains up to 6V.
It operates across −40°C to +85°C with supply voltage range 1.2V to 5.5V (TA = −40°C to +85°C), delivers 35µA typical supply current at VCC = 3.6V, and asserts RESET within 30µs of VCC falling below threshold under 1mV/µs slew rate conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.60V ±2% (VTH−), ensuring accurate detection before system ICs drop below minimum operating voltage |
| Supply Voltage Range | 1.2V to 5.5V (−40°C to +85°C), supporting 1.8V/2.5V/3.3V/5V logic domains |
| Supply Current | 35µA typical at VCC = 3.6V, enabling multi-year battery life in portable equipment |
| RESET Output Type | Active-low open-drain, allowing wired-OR configuration and level-shifting across supply domains |
| RESET Valid Down To | VCC = 1.0V, guaranteeing reset assertion during deep brownout or battery depletion |
| Hysteresis | 0.02–0.03 × VTH−, eliminating oscillation during slow-rising/falling VCC transitions |
| Operating Temperature | −40°C to +85°C, qualified for industrial and extended-temperature embedded applications |
Pinout & Package
MAX6808XR26 is housed in a 3-pin SC70 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (open-drain) | Active-low reset signal output; must be pulled up externally to define logic-high level and sink current when asserted |
| 2 | GND | Ground reference for internal comparator and output stage; requires low-impedance connection to system ground plane |
| 3 | VCC | Power supply input; accepts 1.2V–5.5V; decoupling capacitor required near pin for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| ±2% threshold accuracy | Eliminates need for external trimming resistors and ensures consistent reset behavior across production batches |
| Open-drain RESET output | Enables direct interface to bidirectional µP reset pins (e.g., Motorola 68HC11) without contention risk |
| 35µA supply current | Reduces quiescent power draw in always-on monitoring circuits, critical for battery longevity |
| Immunity to negative VCC transients | Withstands short-duration supply dips (e.g., <100µs at 100mV overdrive) without false reset assertion |
| SC70-3 package | Provides footprint compatibility with SOT23-3 while offering improved thermal performance and manufacturability |
Applications
| Critical µP and µC Power Monitoring | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Monitoring 3.3V supply rail in a handheld data logger during battery discharge cycles. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET when VCC falls below 2.6V, halting processor execution before logic corruption occurs. Use Value: Prevents firmware corruption and data loss by triggering controlled shutdown prior to undervoltage lockout of the µC. | Use Scenario: Supervising power rails in bar-code scanners powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Open-drain RESET output pulled to 5V logic domain, enabling reset signaling across mixed-voltage subsystems. Use Value: Ensures deterministic boot sequence after battery insertion or recovery from deep discharge, even as cell voltage drops to 2.7V. |
| Intelligent Instruments | Computers |
Use Scenario: Power supervision in portable oscilloscope front-end analog modules. IC Role / Device Role / Timing Role: Precision 2.6V threshold aligned with ADC reference stability margin, asserting RESET before analog section misreads. Use Value: Maintains measurement integrity by disabling digital processing before analog signal path degrades due to low supply. | Use Scenario: Standby power monitoring in embedded controller units of industrial PCs. IC Role / Device Role / Timing Role: Low-current (35µA) detector maintaining vigilance during S3/S4 sleep states without draining backup capacitors. Use Value: Guarantees rapid, glitch-free wake-up reset when main supply resumes, meeting BIOS initialization timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB26DBZR | 2.63V threshold (±1%), push-pull active-low output, 0.9V min VCC | Lacks open-drain flexibility; not suitable for bidirectional µP reset pins or multi-supply wired-OR | Select when board layout prohibits external pullup or when lower threshold tolerance is prioritized over interface versatility |
| TPS3808G26DBVR | 2.63V threshold (±0.5%), push-pull active-low output, 0.8V min VCC, adjustable delay option | No open-drain output; includes programmable reset timeout (not present in MAX6808XR26) | Choose when reset pulse extension is required to meet µP minimum reset duration specs, accepting loss of level-shifting capability |
Compared with TLV803EB26DBZR and TPS3808G26DBVR, the MAX6808XR26 uniquely provides open-drain output in a 3-pin SC70 package - enabling interoperability with bidirectional reset I/O and multi-rail systems without additional logic, while maintaining ultra-low quiescent current and industrial temperature support.
Availability
MAX6808XR26 is available at Aetrix Electronics and suitable for critical µP power monitoring, portable/battery-powered equipment, and intelligent instruments requiring stable component supply and long-term obsolescence management.
Supply support for MAX6808XR26 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, communications, and computing applications.
The MAX6806/MAX6807/MAX6808 family was designed specifically for precision, low-power supply voltage monitoring in microprocessor systems - delivering factory-trimmed thresholds, minimal external components, and robust transient immunity in miniature packages.
FAQ
What is the exact reset threshold voltage of the MAX6808XR26?
The MAX6808XR26 has a factory-preset nominal reset threshold of 2.60V with ±2% accuracy over temperature (2.548V to 2.652V at +25°C). This value is specified as VTH− (falling VCC) and includes built-in hysteresis to prevent chatter during slow supply transitions.
Why does the MAX6808XR26 use an open-drain RESET output instead of push-pull?
The MAX6808XR26 uses an open-drain RESET output to safely interface with microprocessors that have bidirectional reset I/O pins (e.g., Motorola 68HC11), avoiding bus contention. It also enables wired-OR configurations and level-shifting across different supply domains - functionality not supported by push-pull variants like the MAX6806XR26.
Can the MAX6808XR26 operate reliably below 1.8V supply voltage?
Yes - the MAX6808XR26 is fully specified to operate down to VCC = 1.2V over the full −40°C to +85°C temperature range, and its RESET output remains valid (guaranteed logic low) down to VCC = 1.0V, making it suitable for ultra-low-voltage battery-powered applications where supply may sag below 1.8V.
What package type and dimensions does the MAX6808XR26 use?
The MAX6808XR26 is supplied in a 3-pin SC70 package (package code X3-2, outline 21-0075), measuring 2.0mm × 2.1mm × 0.95mm. It is tape-and-reel packaged with a minimum order quantity of 2500 units and is footprint-compatible with standard SOT23-3 layouts.
Does the MAX6808XR26 require any external components for basic operation?
No - the MAX6808XR26 requires no external resistors or capacitors for core voltage detection functionality. Only an external pullup resistor on the open-drain RESET pin is needed for proper logic-level definition; a 100kΩ resistor is typically sufficient for high-impedance loads, as confirmed in the device's typical operating circuit.
MAX6808XR26 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- 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 FAQ
1.How can I place an order for MAX6808XR26 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808XR26 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 reliable?
The price and inventory of MAX6808XR26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808XR26 is usually 5 days.
3.What payment methods are accepted for MAX6808XR26?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808XR26 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808XR26?
MAX6808XR26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808XR26 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?
For technical support, including MAX6808XR26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808XR26 requirements.
6.How does Aetrix verify that MAX6808XR26 is sourced from the original manufacturer or authorized distributors?
All MAX6808XR26 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 meets industry standards.
7.What is the process for return or replacement of MAX6808XR26?
All MAX6808XR26 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808XR26, 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 part is unused and in its original packaging.
Return procedure for MAX6808XR26:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6808XR26 Tags
-
MIC826SYMT-TR
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APX803L20-29SA-7
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