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Analog Devices Inc./Maxim Integrated MAX6808US26-T
- Part No.:
- MAX6808US26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6808US26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6808US26-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 operates down to VCC = 1.0V - enabling reliable brownout detection in battery-powered embedded controllers and portable instrumentation.
For engineers reviewing the MAX6808US26-T datasheet, MAX6808US26-T pinout, MAX6808US26-T application, or MAX6808US26-T equivalent, key selection considerations include its SOT143-4 package with manual-reset (MR) input, immunity to VCC transients up to 100mV overdrive, 35µA supply current at 3.6V, and compatibility with multi-rail reset bus architectures via open-drain topology.
Technical Context
The MAX6808US26-T implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable reset assertion/deassertion during supply ramp-up and brownout conditions. Its open-drain RESET output requires an external pullup and supports interfacing with mixed-voltage logic domains (up to 6V).
This variant integrates a manual-reset input (MR) with 80kΩ internal pulldown, enabling operator-initiated resets without external components. It is specified for −40°C to +85°C operation and guarantees RESET validity down to VCC = 1.0V - critical for low-voltage microcontroller supervision where push-pull outputs fail.
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 dropout before ICs exit spec. |
| Supply Current | 35µA typical at VCC = 3.6V; enables years of operation on coin-cell batteries in portable equipment. |
| RESET Output Type | Active-low open-drain; allows wired-OR reset buses and level-shifting across 1.8V/3.3V/5V domains. |
| VCC Operating Range | 1.0V to 5.5V (−40°C to +85°C); supports supervision of ultra-low-power MCUs during deep-sleep states. |
| Hysteresis | 0.02–0.03 × VTH−; prevents output chatter near threshold during slow-rising/falling supplies. |
| MR Input Threshold | VIL = 0.6V, VIH = 0.7×VCC; compatible with standard CMOS logic and momentary switch interfaces. |
| Transient Immunity | Immune to negative VCC transients ≤100mV overdrive for durations <30µs; reduces false resets in noisy environments. |
Pinout & Package
MAX6808US26-T is supplied in a 4-pin SOT143 package (outline 21-0052), featuring exposed pad for thermal performance and RoHS-compliant finish. The package includes dedicated MR input for system-level reset control.
| 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 all internal circuitry and reset comparator; connects to system ground plane. |
| 3 | VCC | Main supply input (1.0V–5.5V); powers internal bandgap reference and comparator; monitored for threshold violation. |
| 4 | MR | Active-high manual reset input; internally pulled down to GND with 80kΩ resistor; asserts RESET when driven ≥0.7×VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.6V threshold | ±2% accuracy eliminates need for external resistive divider or calibration in production. |
| Open-drain RESET with 1µA leakage | Enables shared reset busing across multiple voltage domains without level translators. |
| Manual reset (MR) input | Integrated 80kΩ pulldown allows direct switch connection - no external resistor required. |
| Valid RESET down to VCC = 1.0V | Ensures deterministic reset assertion even during deep brownout or battery depletion. |
| 35µA quiescent current | Minimizes standby power draw in always-on monitoring applications like barcode scanners. |
Applications
| Portable/Battery-Powered Equipment | Bar-Code Scanners |
|---|---|
|
Use Scenario: Handheld scanner operating from single Li-ion cell (2.7–4.2V) with sleep-mode wake-up. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset if cell voltage drops below 2.6V during discharge. Use Value: Prevents MCU corruption during undervoltage operation while enabling >5-year battery life via 35µA ICC. |
Use Scenario: Industrial barcode reader powered by 3.3V rail derived from buck converter. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown before memory write errors occur. Use Value: Open-drain RESET interfaces directly to 3.3V FPGA reset input and shares bus with other supervisors. |
| Critical µP and µC Power Monitoring | Intelligent Instruments |
|
Use Scenario: Medical sensor node using ARM Cortex-M0+ with 1.8V core and 3.3V I/O rails. IC Role / Device Role / Timing Role: Primary reset generator for 3.3V domain, coordinated with MR for field-service recovery. Use Value: MR pin enables technician-initiated reset without power cycle; 2.6V threshold matches 3.3V LDO dropout margin. |
Use Scenario: Portable multimeter with dual-supply analog front-end and LCD controller. IC Role / Device Role / Timing Role: System-level power monitor ensuring clean startup and graceful shutdown on battery swap. Use Value: Hysteresis prevents display flicker during marginal battery insertion; SOT143 footprint saves PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6808UR26-T | Same 2.6V threshold and open-drain output, but in 3-pin SOT23 (no MR pin). | Lacks manual reset capability; suitable only for designs without field-service reset needs. | Select when board space is constrained and MR functionality is unnecessary. |
| TLV803EB26DBZR | 2.63V threshold (±1%), 350nA ICC, no MR, SOT23-3 package; lower current but no manual reset. | Optimized for ultra-low-power IoT endpoints; not pin-compatible and lacks MR support. | Choose for energy-harvesting or coin-cell applications where 350nA ICC outweighs MR requirement. |
Compared with MAX6808US26-T, MAX6808UR26-T removes MR functionality in exchange for smaller footprint, while TLV803EB26DBZR trades MR and robust transient immunity for nanoamp-level quiescent current - making each optimal for distinct power and serviceability priorities.
Availability
MAX6808US26-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, bar-code scanners, and critical µP and µC power monitoring requiring stable component supply and long-term industrial availability.
Supply support for MAX6808US26-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 industrial, medical, and communications applications, emphasizing high reliability and low power.
The MAX6806/MAX6807/MAX6808 family delivers cost-effective, single-chip voltage supervision for microprocessor systems - targeting applications where external component count, board space, and supply robustness are critical constraints.
FAQ
What is the reset threshold voltage of the MAX6808US26-T?
The MAX6808US26-T has a factory-preset reset threshold of 2.60V ±2% (VTH−) at +25°C, with temperature coefficient of 30ppm/°C. This value is guaranteed across the full −40°C to +85°C operating range and ensures reliable detection of 2.5V system supply regulation loss before downstream ICs malfunction.
Does the MAX6808US26-T support manual reset functionality?
Yes, the MAX6808US26-T includes a dedicated MR (manual reset) input on pin 4 of its SOT143 package. It features an internal 80kΩ pulldown resistor, so the pin can be left floating if unused. Driving MR high (≥0.7×VCC) asserts the open-drain RESET output low, enabling field-service or test-mode recovery without power cycling.
What is the minimum VCC voltage at which MAX6808US26-T guarantees valid RESET output?
The MAX6808US26-T guarantees valid active-low RESET output down to VCC = 1.0V, as confirmed in the Electrical Characteristics table. Below 1.0V, the output becomes high-impedance; for ground-referenced validity, a 100kΩ pulldown resistor on RESET is recommended per Figure 4 in the datasheet.
Can MAX6808US26-T interface with 5V logic while powered from a 3.3V supply?
Yes - the MAX6808US26-T's open-drain RESET output allows external pullup to any voltage up to 6V. When powered from 3.3V, its RESET pin can be pulled up to 5V, enabling direct interface with 5V microcontrollers or FPGAs without level-shifting circuitry.
What package type and pin count does MAX6808US26-T use?
The MAX6808US26-T uses a 4-pin SOT143 package (outline 21-0052), with pins assigned as RESET (1), GND (2), VCC (3), and MR (4). This package includes the manual-reset feature absent in the 3-pin SOT23 and SC70 variants of the same family.
MAX6808US26-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- 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:
- SOT-23-4
MAX6808US26-T FAQ
1.How can I place an order for MAX6808US26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808US26-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 MAX6808US26-T reliable?
The price and inventory of MAX6808US26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808US26-T is usually 5 days.
3.What payment methods are accepted for MAX6808US26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808US26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808US26-T?
MAX6808US26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808US26-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 MAX6808US26-T?
For technical support, including MAX6808US26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808US26-T requirements.
6.How does Aetrix verify that MAX6808US26-T is sourced from the original manufacturer or authorized distributors?
All MAX6808US26-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 MAX6808US26-T meets industry standards.
7.What is the process for return or replacement of MAX6808US26-T?
All MAX6808US26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808US26-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 MAX6808US26-T part is unused and in its original packaging.
Return procedure for MAX6808US26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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