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Analog Devices Inc./Maxim Integrated MAX6806UR26+T
- Part No.:
- MAX6806UR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806UR26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
MAX6806UR26+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 push-pull RESET output, and operates down to VCC = 1.0V - enabling reliable brownout detection in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6806UR26+T datasheet, MAX6806UR26+T pinout, MAX6806UR26+T application, or MAX6806UR26+T equivalent, key selection criteria include guaranteed reset assertion at VCC ≥ 1.0V, 35µA supply current at 3.6V, ±2% threshold accuracy over -40°C to +85°C, and compatibility with 3-pin SOT23 footprint constraints.
Technical Context
The MAX6806UR26+T implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable reset assertion/deassertion during supply transients. Its push-pull output drives logic-level RESET signals without external pull-up components.
It functions as a standalone supervisory circuit with no timeout delay: RESET transitions immediately upon VCC crossing the 2.6V threshold in either direction. The device supports manual reset only in SOT143 packages - not applicable to the SOT23-packaged MAX6806UR26+T.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.60V ±2% (VTH−), factory-trimmed - ensures accurate power-fail detection for 2.5V/3.3V systems |
| Supply Voltage Range | 1.0V to 5.5V - enables operation during deep brownout and full-system power-up sequencing |
| Supply Current | 35µA typical at VCC = 3.6V - minimizes quiescent load in always-on monitoring paths |
| RESET Output Type | Active-low, push-pull - directly interfaces CMOS/TTL inputs without pull-up resistors |
| Reset Delay | 30µs typical (VCC falling at 1mV/µs) - provides deterministic timing for processor initialization |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable equipment environments |
| Threshold Tempco | 30ppm/°C - maintains accuracy across temperature without calibration |
Pinout & Package
MAX6806UR26+T is housed in a 3-pin SOT23 package (package code U3-1), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low push-pull output | Drives low when VCC < 2.6V; high-impedance state not supported - requires no external pull-up |
| 2 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance for noise immunity |
| 3 (VCC) | Supply input | Monitored voltage source; valid operation down to 1.0V ensures reset assertion even during severe brownout |
Key Features
| Feature | Design Value |
|---|---|
| ±2% reset threshold accuracy | Guaranteed over -40°C to +85°C - eliminates need for external trimming or calibration in production |
| No external components required | Self-contained detection and output drive - reduces BOM count and PCB area vs. discrete resistor-divider + comparator solutions |
| 35µA supply current | Enables multi-year battery life in always-on monitoring applications such as barcode scanners and handheld instruments |
| Immunity to negative-going VCC transients | Withstands ≤100µs dips of up to 200mV below threshold - prevents false resets in electrically noisy environments |
| Valid RESET down to VCC = 1.0V | Ensures processor remains held in reset until supply recovers sufficiently for reliable core operation |
Applications
| Portable/Battery-Powered Equipment | Critical µP and µC Power Monitoring |
|---|---|
Use Scenario: Battery voltage drops during discharge in handheld medical devices or IoT sensors. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to hold microcontroller in reset until battery recovers above 2.6V. Use Value: Prevents erratic firmware execution during low-battery states by guaranteeing reset assertion down to VCC = 1.0V. | Use Scenario: Power supply instability during cold-start in industrial controllers. IC Role / Device Role / Timing Role: Primary supervisory IC monitoring 3.3V rail and generating immediate reset pulse on undervoltage. Use Value: Eliminates need for RC-based reset timers - delivers deterministic, zero-delay reset response aligned to VCC crossing 2.6V. |
| Bar-Code Scanners | Intelligent Instruments |
Use Scenario: Rapid on/off cycling in retail barcode scanners causes supply droop during motor activation. IC Role / Device Role / Timing Role: Standalone reset supervisor interfacing directly with scanner's ARM Cortex-M0 MCU via push-pull RESET. Use Value: 35µA quiescent current extends duty-cycle battery life; ±2% threshold ensures consistent trip point across units and temperatures. | Use Scenario: Precision data acquisition systems requiring clean power-up sequencing before ADC sampling begins. IC Role / Device Role / Timing Role: System-level voltage monitor triggering FPGA configuration lock and analog front-end enable signals. Use Value: Internal hysteresis (0.02–0.03 × VTH−) prevents chatter near 2.6V, ensuring single, clean reset assertion during marginal supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR26+T | Same 2.6V threshold, but includes 200ms reset timeout; higher ICC (1.2µA typical) | Required where processor needs guaranteed minimum reset pulse width; unsuitable for immediate-response use cases | Select MAX6806UR26+T when zero-delay reset assertion is critical; choose MAX6326UR26+T only if timeout functionality is explicitly needed. |
| TPS3808G26DBVR | 2.63V threshold (±0.5%), 1.8µA ICC, open-drain output - requires external pull-up | Better suited for multi-rail systems needing level-shifted reset or wired-OR configurations | Prefer MAX6806UR26+T for simplicity in single-rail, push-pull-driven µP reset; TPS3808G26DBVR adds complexity but improves flexibility in mixed-voltage designs. |
Compared with MAX6326UR26+T and TPS3808G26DBVR, the MAX6806UR26+T delivers immediate reset response without timeout delay or external components - making it optimal for fast-reacting, low-power, single-supply monitoring where deterministic edge-aligned reset is required.
Availability
MAX6806UR26+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical µP and µC power monitoring, and intelligent instrumentation requiring stable component supply and guaranteed industrial temperature operation.
Supply support for MAX6806UR26+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, mixed-signal, and power-management ICs for industrial, computing, and communications applications.
The MAX6806 series belongs to Maxim's supervisory IC product line, engineered specifically for accurate, low-power voltage monitoring in resource-constrained digital systems - emphasizing threshold stability, minimal external components, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6806UR26+T?
The MAX6806UR26+T has a factory-preset nominal reset threshold of 2.60V with ±2% accuracy over -40°C to +85°C. Electrical characteristics specify VTH− = 2.548V (min) to 2.652V (max) at +25°C, and the device guarantees stable switching with internal hysteresis of 0.02–0.03 × VTH−. This threshold is laser-trimmed and does not require external calibration.
Does the MAX6806UR26+T support manual reset functionality?
No, the MAX6806UR26+T does not support manual reset. Manual reset (MR) input is only available in the 4-pin SOT143 package variant (e.g., MAX6806US26-T). The MAX6806UR26+T uses a 3-pin SOT23 package with pins limited to RESET, GND, and VCC - no MR terminal is present or internally connected.
What is the minimum supply voltage at which MAX6806UR26+T guarantees valid RESET output?
The MAX6806UR26+T guarantees valid active-low RESET output down to VCC = 1.0V. Below this voltage, the output becomes high-impedance and may float. This specification ensures reliable reset assertion during deep brownout conditions common in battery-powered systems before the supply collapses entirely.
Can MAX6806UR26+T be used with a 1.8V microcontroller supply rail?
Yes, the MAX6806UR26+T can monitor a 1.8V rail, but only if the rail is expected to drop below 2.6V during fault conditions - which is physically impossible. Since its threshold is fixed at 2.6V, it is intended for monitoring 3.3V or 5V rails where 2.6V represents an undervoltage condition. For 1.8V systems, a lower-threshold device like MAX6806UR18+T would be appropriate.
Is the MAX6806UR26+T pin-compatible with other MAX680x variants in SOT23 package?
Yes, all MAX6806/MAX6807/MAX6808 variants in 3-pin SOT23 (e.g., MAX6806UR26+T, MAX6807UR26+T, MAX6808UR26+T) share identical pinout: Pin 1 = RESET/RESET, Pin 2 = GND, Pin 3 = VCC. However, output behavior differs - MAX6806UR26+T is active-low push-pull, so substituting it for MAX6807UR26+T (active-high) or MAX6808UR26+T (open-drain) will cause functional failure unless circuitry is redesigned.
MAX6806UR26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.6V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 30µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
MAX6806UR26+T FAQ
1.How can I place an order for MAX6806UR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806UR26+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 MAX6806UR26+T reliable?
The price and inventory of MAX6806UR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806UR26+T is usually 5 days.
3.What payment methods are accepted for MAX6806UR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806UR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806UR26+T?
MAX6806UR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806UR26+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 MAX6806UR26+T?
For technical support, including MAX6806UR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806UR26+T requirements.
6.How does Aetrix verify that MAX6806UR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6806UR26+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 MAX6806UR26+T meets industry standards.
7.What is the process for return or replacement of MAX6806UR26+T?
All MAX6806UR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806UR26+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 MAX6806UR26+T part is unused and in its original packaging.
Return procedure for MAX6806UR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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