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Analog Devices Inc./Maxim Integrated MAX6806UR46-T
- Part No.:
- MAX6806UR46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806UR46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:19,428
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Product details
Overview
MAX6806UR46-T from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It features a factory-preset 4.6V ±2% reset threshold, active-low push-pull RESET output, guaranteed operation down to VCC = 1.0V, 35µA supply current, and internal hysteresis - enabling reliable power-on reset generation in portable battery-powered equipment and critical µP/µC applications.
For engineers reviewing the MAX6806UR46-T datasheet, MAX6806UR46-T pinout, MAX6806UR46-T application, or MAX6806UR46-T equivalent, this device delivers deterministic reset assertion during power-up, brown-out, and power-down events while eliminating external components and calibration - key for space-constrained, low-power embedded designs requiring stable supply monitoring.
Technical Context
The MAX6806UR46-T implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring noise-immune switching between rising and falling VCC thresholds. Its reset logic asserts RESET low when VCC falls below 4.6V (±2% at +25°C) and deasserts immediately upon VCC exceeding VTH+, with no timeout delay.
It operates across −40°C to +85°C, draws only 35µA typical supply current at VCC = 3.6V, and maintains valid RESET output down to VCC = 1.0V. The SOT23-3 package provides minimal footprint without manual reset input - distinguishing it from the 4-pin SOT143 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.6V ±2% (VTH− at +25°C); ensures reliable detection of 5V supply undervoltage before system ICs drop out of spec. |
| Supply Current | 35µA typical at VCC = 3.6V; enables multi-year battery life in portable equipment. |
| RESET Output Type | Active-low, push-pull; drives CMOS inputs directly without pull-up resistor, reducing BOM count. |
| VCC Operating Range | 1.0V to 5.5V (−40°C to +85°C); supports full reset validity during deep brown-out down to near-dead-battery conditions. |
| Hysteresis | 0.02–0.03 × VTH−; prevents output chatter during slow-rising/falling VCC near threshold. |
| Tempco | 30 ppm/°C; maintains threshold stability over industrial temperature range. |
| Reset Delay | 30µs (VCC falling at 1mV/µs); provides fast, deterministic response to supply collapse. |
Pinout & Package
MAX6806UR46-T is housed in a 3-pin SOT23 package (package code U3-1), with exposed pad not electrically connected. Pin 1 is RESET (active-low push-pull), Pin 2 is GND, and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Active-low reset output | Drives low during undervoltage; sinks up to 1mA at VCC = 2.0V; valid down to VCC = 1.0V. |
| 2 (GND) | Ground reference | Common return path for internal circuitry and RESET load; must be low-impedance. |
| 3 (VCC) | Supply voltage input | Accepts 1.0V–5.5V; powers internal comparator and output stage; absolute max = +6.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.6V threshold | ±2% accuracy over −40°C to +85°C ensures robust detection margin for 5V ±5% supplies. |
| No external components required | Integrated hysteresis, reference, and output driver eliminate resistors, capacitors, and trimming. |
| Low 35µA quiescent current | Enables use in always-on battery-backed systems without compromising runtime. |
| Immunity to VCC transients | Withstands negative-going transients ≤100µs (depending on overdrive), reducing need for extra filtering. |
| Valid RESET down to 1.0V | Guarantees clean reset assertion even as battery voltage collapses near end-of-life. |
Applications
| Portable/Battery-Powered Equipment | Critical µP and µC Power Monitoring |
|---|---|
|
Use Scenario: Handheld barcode scanners operating from single-cell Li-ion batteries experiencing voltage sag under load. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to hold µC in reset until battery recovers above 4.6V. Use Value: Prevents erratic µC execution during brown-out, avoiding data corruption or unsafe actuator behavior. |
Use Scenario: Industrial controller board where main 5V rail must remain within ±5% tolerance for FPGA and ADC operation. IC Role / Device Role / Timing Role: Primary power-good monitor triggering system-wide reset if 5V rail drops below 4.6V. Use Value: Eliminates need for discrete comparator + reference + hysteresis network, saving 4–5 mm² PCB area. |
| Computers | Intelligent Instruments |
|
Use Scenario: Embedded PC/104 module with legacy ISA bus interface requiring clean power-on reset timing. IC Role / Device Role / Timing Role: Generates immediate, glitch-free reset pulse on VCC rise above 4.6V - no programmable delay. Use Value: Ensures synchronous initialization of CPU, BIOS, and peripheral controllers without external RC timing. |
Use Scenario: Portable multimeter with auto-ranging analog front-end and LCD display powered by alkaline cells. IC Role / Device Role / Timing Role: Monitors main 3.3V LDO output derived from 9V battery; asserts RESET when LDO input sags. Use Value: Maintains measurement integrity by halting sampling and display updates before supply becomes unstable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR46-T | Same 4.6V threshold, but includes 200ms reset timeout and higher 100µA supply current. | Used where extended reset pulse duration is required for slow-starting peripherals. | Select MAX6326UR46-T only if timeout functionality is needed; MAX6806UR46-T offers faster, immediate reset release. |
| TLV803EB46DBZR | 4.6V threshold, ±1% accuracy, 300nA quiescent current, but open-drain output requiring pull-up. | Suitable for ultra-low-power IoT sensors where µA-level savings outweigh added component count. | Choose TLV803EB46DBZR for sub-µA standby; MAX6806UR46-T is preferred when push-pull drive and simplicity are prioritized. |
Compared with MAX6326UR46-T and TLV803EB46DBZR, the MAX6806UR46-T uniquely balances precision (±2%), ultra-low power (35µA), and push-pull simplicity - making it optimal for cost-sensitive, space-constrained µP supervisory roles where immediate reset response and zero external parts are essential.
Availability
MAX6806UR46-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical µP and µC power monitoring, and intelligent instruments requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6806UR46-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 series belongs to Maxim's precision voltage detector product line, engineered specifically for deterministic, low-power supply monitoring in microprocessor and microcontroller systems where reliability and minimal footprint are critical.
FAQ
What is the exact reset threshold voltage of the MAX6806UR46-T?
The MAX6806UR46-T has a factory-trimmed nominal reset threshold of 4.6V, specified as 4.508V (min) to 4.692V (max) at +25°C, with ±2% accuracy over the full −40°C to +85°C operating range. This value is guaranteed per the Electrical Characteristics table in the official datasheet and applies specifically to the MAX6806UR46-T variant.
Does the MAX6806UR46-T include a manual reset input?
No, the MAX6806UR46-T does not include a manual reset (MR) input. It is packaged in a 3-pin SOT23 configuration with only RESET, GND, and VCC pins. Manual reset capability is exclusive to the 4-pin SOT143 variants (e.g., MAX6806US46-T), which dedicate Pin 2 to MR.
What is the minimum VCC voltage at which the MAX6806UR46-T guarantees valid RESET output?
The MAX6806UR46-T guarantees valid active-low RESET output down to VCC = 1.0V, as confirmed in the Electrical Characteristics table under "RESET Output Voltage (MAX6806/MAX6808)" with VOL ≤ 0.3V at ISINK = 20µA and VCC = 1.0V. Below 1.0V, RESET becomes high-impedance.
Can the MAX6806UR46-T replace the MAX6326UR46-T in an existing design?
The MAX6806UR46-T is not a direct functional replacement for the MAX6326UR46-T because it lacks the 200ms reset timeout feature. While both share the same 4.6V threshold and SOT23-3 package, the MAX6806UR46-T releases RESET immediately upon VCC exceeding VTH+, whereas the MAX6326UR46-T holds RESET active for 200ms. Board-level validation is required before substitution.
What package type and marking does the MAX6806UR46-T use?
The MAX6806UR46-T uses the 3-pin SOT23 package (outline 21-0051) with top-mark "FZDP", as documented in the Selector Guide section of the MAX6806–MAX6808 datasheet. It is supplied in tape-and-reel format with a minimum order quantity of 2500 units.
MAX6806UR46-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:
- Bulk
- 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
MAX6806UR46-T FAQ
1.How can I place an order for MAX6806UR46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806UR46-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 MAX6806UR46-T reliable?
The price and inventory of MAX6806UR46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806UR46-T is usually 5 days.
3.What payment methods are accepted for MAX6806UR46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806UR46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806UR46-T?
MAX6806UR46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806UR46-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 MAX6806UR46-T?
For technical support, including MAX6806UR46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806UR46-T requirements.
6.How does Aetrix verify that MAX6806UR46-T is sourced from the original manufacturer or authorized distributors?
All MAX6806UR46-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 MAX6806UR46-T meets industry standards.
7.What is the process for return or replacement of MAX6806UR46-T?
All MAX6806UR46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806UR46-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 MAX6806UR46-T part is unused and in its original packaging.
Return procedure for MAX6806UR46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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