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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:880
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Product details
Overview
MAX6808XR26+ from Maxim Integrated is a precision voltage detector IC designed for reliable 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 robust brownout detection in battery-powered instrumentation and portable equipment.
For engineers reviewing the MAX6808XR26+ datasheet, MAX6808XR26+ pinout, MAX6808XR26+ application, or MAX6808XR26+ equivalent, key selection considerations include its open-drain output architecture 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 reference and comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable reset assertion/deassertion during supply transients. Its open-drain RESET output requires an external pullup 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), exhibits 30ppm/°C reset threshold tempco, and tolerates VCC negative transients up to 100µs at 100mV overdrive without false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.60V ±2% (VTH− at +25°C); ensures accurate detection of 2.5V system supply undervoltage before IC functional failure. |
| Supply Current | 35µA typical at VCC = 3.6V; enables multi-year battery life in always-on portable monitoring devices. |
| RESET Valid Down To | VCC = 1.0V; guarantees valid reset signal during deep brownout or battery discharge below 1.2V. |
| Output Type | Active-low open-drain; allows wired-OR configuration, level-shifting, and safe interfacing with bidirectional µP reset pins. |
| Hysteresis | 0.02–0.03 × VTH−; prevents output chatter near threshold during slow-rising/falling VCC (e.g., power-up sequencing). |
| Operating Temp | −40°C to +85°C; qualified for industrial and extended-temperature embedded control applications. |
| Package | 3-pin SC70 (X3-2 outline); 1.25mm × 0.85mm footprint ideal for compact handheld and sensor-node PCBs. |
Pinout & Package
MAX6808XR26+ is housed in a 3-pin SC70 package (outline X3-2) with exposed pad not connected internally. Pin 1 = RESET (active-low open-drain), Pin 2 = GND, Pin 3 = VCC. No manual reset (MR) or NC pins - simplified layout versus SOT143/µMAX variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low open-drain output | Sinks current when VCC < 2.6V; requires external pullup to define logic-high level and drive load capacitance. |
| 2 (GND) | Ground reference | Return path for internal bias and RESET sink current; must be low-impedance connection to system ground plane. |
| 3 (VCC) | Supply voltage input | Power source for internal circuitry; accepts 1.2V–5.5V; decoupling capacitor required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% threshold accuracy | Guarantees reset assertion before downstream 2.5V/3V ICs exit specification - no calibration or trimming needed. |
| Open-drain RESET | Enables direct interface to µPs with bidirectional reset I/O (e.g., Motorola 68HC11), avoiding bus contention. |
| 1.0V VCC minimum | Supports full reset functionality during battery discharge down to 1.0V, critical for data retention in low-power shutdown. |
| 35µA supply current | Reduces quiescent power in always-on supervisory circuits - extends runtime in coin-cell–powered bar-code scanners. |
| Immunity to VCC transients | Rejects negative-going supply glitches ≤100µs at 100mV overdrive, eliminating false resets in noisy industrial environments. |
Applications
| Portable Battery-Powered Equipment | Intelligent Instruments |
|---|---|
|
Use Scenario: Handheld multimeter operating from single 3.0V lithium coin cell with gradual voltage decay. IC Role / Device Role / Timing Role: Voltage detector asserting reset before ADC reference or display controller fails due to undervoltage. Use Value: Prevents corrupted measurements by forcing controlled shutdown at precisely 2.6V, leveraging ±2% threshold tolerance. |
Use Scenario: Benchtop oscilloscope with FPGA-based acquisition engine requiring clean power-on reset sequence. IC Role / Device Role / Timing Role: Primary supervisor generating reset pulse synchronized to 3.3V rail stabilization. Use Value: Open-drain output allows shared reset bus with other supervisors and avoids contention on bidirectional FPGA reset pin. |
| Critical µP and µC Power Monitoring | Bar-Code Scanners |
|
Use Scenario: Industrial PLC controller using ARM Cortex-M4 with strict 2.5V ±5% supply requirement. IC Role / Device Role / Timing Role: Standalone reset generator ensuring µC remains held in reset until 2.6V rail is fully regulated. Use Value: 30µs delay at VCC fall ensures reset persists through brief dips, while hysteresis prevents chatter near threshold. |
Use Scenario: Wireless barcode scanner with Bluetooth LE module and laser driver sharing 3.3V LDO. IC Role / Device Role / Timing Role: Low-quiescent monitor enabling >1000 scan cycles per charge via 35µA sleep current. Use Value: SC70-3 footprint minimizes board area in ultra-thin ergonomic housing without sacrificing supervision reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6806XR26+ | Active-low push-pull RESET output; no external pullup required; RESET valid to VCC = 1.0V. | Better suited for simple µP reset where bus sharing or level translation is unnecessary. | Select when minimizing external components and driving standard CMOS inputs directly. |
| TLV803DBZT | 2.63V threshold, ±1.5% accuracy, SOT23-3, push-pull active-low RESET, 1.8V–6V VCC range. | Lacks transient immunity specs and hysteresis documentation; lower max VCC rating than MAX6808XR26+. | Choose for cost-sensitive consumer designs where tighter threshold tolerance offsets reduced noise immunity. |
Compared with MAX6806XR26+, MAX6808XR26+ provides open-drain flexibility for multi-voltage systems but requires a pullup resistor; compared with TLV803DBZT, it offers superior documented transient rejection and hysteresis control at the expense of slightly higher unit cost and less aggressive threshold tolerance.
Availability
MAX6808XR26+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, critical µP and µC power monitoring, and bar-code scanners requiring stable component supply and long-term industrial availability.
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 delivers precision voltage supervision with minimal external components - engineered specifically for reliable power-on reset and brownout protection in resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6808XR26+?
The MAX6808XR26+ has a factory-trimmed 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 oscillation near the trip point.
Why does the MAX6808XR26+ use an open-drain output instead of push-pull?
The MAX6808XR26+ uses an open-drain RESET output to enable wired-OR configurations, level shifting across different supply domains (up to 6V), and safe interfacing with microprocessors that have bidirectional reset I/O pins - avoiding bus contention that would occur with push-pull drivers like those in MAX6806XR26+.
Can the MAX6808XR26+ operate with a 1.8V supply?
Yes, the MAX6808XR26+ operates with VCC as low as 1.2V over the full −40°C to +85°C temperature range. At 1.8V, it maintains full functionality including accurate 2.6V threshold detection, 35µA supply current, and valid open-drain RESET assertion - making it suitable for modern low-voltage embedded systems.
What package type is used for the MAX6808XR26+ and what are its dimensions?
The MAX6808XR26+ uses a 3-pin SC70 package (outline X3-2), measuring 1.25mm × 0.85mm with 0.65mm pitch. This ultra-small footprint is optimized for space-constrained PCBs in portable and handheld electronics, and is supplied in tape-and-reel format with 2500-piece minimum order quantity.
Does the MAX6808XR26+ include a manual reset input?
No, the MAX6808XR26+ does not include a manual reset (MR) input. MR is only available on the 4-pin SOT143 variants (e.g., MAX6808US26-T). The SC70-3 package contains only RESET, GND, and VCC pins - simplifying layout and reducing bill-of-materials for applications where manual reset is not required.
MAX6808XR26+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- 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+ 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.
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