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Analog Devices Inc./Maxim Integrated MAX6806UR46
- Part No.:
- MAX6806UR46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806UR46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
MAX6806UR46 from Maxim Integrated is a precision voltage detector IC designed for power-supply monitoring in microprocessor-based systems. It provides an active-low, push-pull RESET output with a factory-trimmed 4.6V ±2% threshold, operates down to VCC = 1.0V, draws only 35µA supply current, and is housed in a 3-pin SOT23 package - ideal for space-constrained embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6806UR46 datasheet, MAX6806UR46 pinout, MAX6806UR46 application, or MAX6806UR46 equivalent, this device serves as a low-power, high-accuracy reset supervisor for critical µP/µC power monitoring where stable threshold accuracy, fast response to brownouts, and minimal external components are required.
Technical Context
The MAX6806UR46 implements a precision bandgap-based voltage reference and comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH⁻), ensuring noise-immune switching during supply transients. Its reset assertion is purely analog - no internal timer or delay circuitry - enabling immediate response to VCC falling below 4.6V.
It features a push-pull output stage capable of sinking ≥20µA at VCC = 1.0V (VOL ≤ 0.3V) and sourcing up to 2.0mA at VCC = 5.0V (VOH ≥ 0.8×VCC), eliminating need for external pull-up resistors. The device is rated for operation from –40°C to +85°C and supports supply voltages from 1.2V to 5.5V across full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.60V ±2% (4.508V–4.692V at +25°C); ensures reliable reset before system ICs drop below minimum operating voltage. |
| Supply Current | 35µA typical at VCC = 3.6V; enables long battery life in portable equipment without compromising detection accuracy. |
| RESET Valid Down To | VCC = 1.0V; guarantees logic-low output even during deep brownout, supporting robust low-voltage system recovery. |
| Hysteresis | 0.02–0.03 × VTH⁻; prevents output chatter near threshold during slow-rising/falling supplies or noise coupling. |
| Operating Temp Range | –40°C to +85°C; qualified for industrial and automotive-adjacent embedded control environments. |
| Package | 3-pin SOT23 (U3-1); surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
| Output Type | Active-low, push-pull; drives CMOS/TTL loads directly without external pull-up, simplifying BOM and layout. |
Pinout & Package
MAX6806UR46 is supplied in a 3-pin SOT23 package (package code U3-1, outline 21-0051). The package has no exposed pad and is RoHS-compliant. Pin 1 is RESET (active-low), Pin 2 is GND, and Pin 3 is VCC - consistent across all MAX6806 variants in SOT23 format.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low when VCC < 4.6V; valid down to VCC = 1.0V; no external pull-up required. |
| 2 | GND | Ground reference for internal reference and comparator; must be low-impedance connection to minimize noise sensitivity. |
| 3 | VCC | Power supply input; accepts 1.2V–5.5V; absolute max rating is +6.0V; transient immunity up to 100V/µs. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% threshold accuracy | Guarantees reset assertion within tight margin of 4.6V across temperature, eliminating need for calibration or trimming. |
| No external components | Integrates reference, comparator, hysteresis, and output driver - reduces BOM count and board area vs. discrete solutions. |
| 35µA quiescent current | Enables use in always-on monitoring circuits for battery-backed systems without significant standby drain. |
| Immunity to VCC transients | Withstands negative-going supply glitches up to 100mV overdrive for ≤100µs without false reset generation. |
| Valid reset down to 1.0V | Ensures deterministic state during deep undervoltage events, preventing undefined µP behavior prior to complete power loss. |
Applications
| Industrial Controllers | Portable Barcode Scanners |
|---|---|
|
Use Scenario: PLC I/O modules and motor controllers require reliable power-on reset and brownout detection to prevent erratic actuator commands. IC Role / Device Role / Timing Role: Voltage detector providing immediate active-low reset signal upon VCC drop below 4.6V, synchronized to supply rail collapse. Use Value: Prevents unsafe state transitions during unstable power conditions; eliminates need for RC-based reset circuits with poor temperature stability. |
Use Scenario: Handheld barcode scanners powered by single-cell Li-ion batteries experience rapid VCC sag during laser activation and RF transmission. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET when battery voltage falls below 4.6V, triggering controlled shutdown before data corruption occurs. Use Value: Extends usable battery window by enabling precise low-voltage cutoff; 35µA current minimizes idle drain during sleep mode. |
| Intelligent Test Instruments | Critical Microprocessor Systems |
|
Use Scenario: Bench multimeters and oscilloscope front-ends rely on stable firmware execution during AC line interruptions or battery swaps. IC Role / Device Role / Timing Role: Precision reset supervisor ensuring µC remains held in reset until regulated 5V rail stabilizes above 4.6V ±2%. Use Value: Eliminates spurious reboots caused by marginal supply regulation; hysteresis prevents oscillation during slow power-up ramps. |
Use Scenario: Medical diagnostic devices and aerospace avionics demand fail-safe reset behavior under voltage sags induced by EMI or load switching. IC Role / Device Role / Timing Role: Primary reset source for ARM Cortex-M or PIC microcontrollers, interfacing directly to bidirectional reset pins via push-pull drive. Use Value: Push-pull output avoids contention issues seen with open-drain alternatives; guaranteed 1.0V operation supports ultra-low-power retention modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6806US46-T | 4-pin SOT143 package with manual-reset (MR) input; same 4.6V threshold and push-pull output. | Required where operator-initiated reset or test-mode reset is needed; MR pin includes internal 80kΩ pulldown. | Select MAX6806US46-T if system-level diagnostics or field service reset capability is mandatory. |
| TPS3808G33DBVR | Texas Instruments part with 3.3V threshold, 0.5% accuracy, and 1.8µA quiescent current; different threshold and tighter tolerance. | Used in 3.3V systems requiring ultra-low IQ; not interchangeable due to mismatched threshold and output timing behavior. | Choose TPS3808G33DBVR only for 3.3V rails where sub-1µA standby current outweighs ±2% threshold tolerance requirements. |
Compared with MAX6806US46-T, MAX6806UR46-T saves board space and cost by omitting MR functionality; compared with TPS3808G33DBVR, it offers higher threshold accuracy margin for 5V systems but consumes more quiescent current - making it optimal for industrial 4.6V supervision where reliability trumps ultra-low IQ.
Availability
MAX6806UR46 is available at Aetrix Electronics and suitable for industrial controllers, portable barcode scanners, intelligent test instruments, and critical microprocessor systems requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance.
Supply support for MAX6806UR46 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, communications, and computing applications.
The MAX6806 series belongs to Maxim's supervisory IC product line, engineered specifically for accurate, low-power voltage monitoring in µP/µC systems where deterministic reset timing and minimal external components are essential.
FAQ
What is the exact reset threshold voltage of MAX6806UR46 and how tightly is it specified?
The MAX6806UR46 has a nominal reset threshold of 4.60V, with guaranteed accuracy of ±2% over temperature (4.508V to 4.692V at +25°C). This specification is factory-trimmed and tested across the full –40°C to +85°C operating range, ensuring consistent behavior without external calibration.
Does MAX6806UR46 support operation at very low supply voltages, and what happens to the RESET output below 1.0V?
Yes, MAX6806UR46 guarantees RESET output validity down to VCC = 1.0V. Below 1.0V, the output stage ceases sinking current and becomes high-impedance. In applications requiring defined logic state down to ground, a 100kΩ pulldown resistor on RESET is recommended - a design detail explicitly validated in Maxim's application notes for MAX6806UR46.
Is MAX6806UR46 pin-compatible with legacy supervisory ICs like the MC33064?
No, MAX6806UR46 is not pin-compatible with MC33064. While the 8-pin µMAX and SO packages of MAX6806 are pin-compatible with MC33064/MC34064, the MAX6806UR46 uses a 3-pin SOT23 package with RESET/GND/VCC pinout - a distinct layout incompatible with 4-pin or 8-pin legacy footprints.
Can MAX6806UR46 be used in systems with noisy power supplies, and how is its transient immunity characterized?
Yes, MAX6806UR46 is specifically designed to reject short-duration negative-going VCC transients. Per Maxim's characterization, it ignores transients ≤100µs wide when the overdrive (VTH⁻ – VCC) is ≤100mV - a key feature confirmed in Figure 3 of the MAX6806UR46 datasheet and validated in industrial power-monitoring applications.
What is the supply current consumption of MAX6806UR46, and does it vary significantly with temperature or supply voltage?
MAX6806UR46 draws 35µA typical supply current at VCC = 3.6V and +25°C, rising to 60µA maximum across –40°C to +85°C. At VCC = 5.5V, current increases to 50–80µA. This variation is fully characterized in the Electrical Characteristics table and remains stable enough to support battery-life modeling in portable equipment.
MAX6806UR46 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 FAQ
1.How can I place an order for MAX6806UR46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806UR46 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 reliable?
The price and inventory of MAX6806UR46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806UR46 is usually 5 days.
3.What payment methods are accepted for MAX6806UR46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806UR46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806UR46?
MAX6806UR46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806UR46 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?
For technical support, including MAX6806UR46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806UR46 requirements.
6.How does Aetrix verify that MAX6806UR46 is sourced from the original manufacturer or authorized distributors?
All MAX6806UR46 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 meets industry standards.
7.What is the process for return or replacement of MAX6806UR46?
All MAX6806UR46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806UR46, 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 part is unused and in its original packaging.
Return procedure for MAX6806UR46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6806UR46 Tags
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