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Analog Devices Inc./Maxim Integrated MAX6806US46
- Part No.:
- MAX6806US46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806US46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,132
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Product details
Overview
MAX6806US46 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, manual-reset input (MR), and guaranteed operation down to VCC = 1.0V - enabling reliable brownout detection in battery-powered instrumentation and embedded controllers.
For engineers reviewing the MAX6806US46 datasheet, MAX6806US46 pinout, MAX6806US46 application, or MAX6806US46 equivalent, this device serves as a low-power (35µA typical), hysteresis-stabilized supervisory circuit for critical µP/µC power sequencing, portable equipment power monitoring, and intelligent instrument reset management.
Technical Context
The MAX6806US46 implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−) to prevent output chatter near the 4.6V threshold. Its push-pull RESET output drives logic-low actively without external pull-up, while the dedicated MR pin (available only in SOT143) allows external reset initiation via a momentary switch or logic signal.
It operates across −40°C to +85°C with supply current stable from 1.0V to 5.5V VCC, and its reset delay is ≤30µs (VCC falling at 1mV/µs). The device is immune to negative-going VCC transients up to 100µs (for 100mV overdrive), supporting robust operation in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.60V ±2% (4.508V–4.692V at +25°C); ensures reset assertion before system ICs drop below minimum operating voltage. |
| Supply Current | 35µA typical at VCC = 3.6V; enables multi-year battery life in portable equipment. |
| RESET Valid Down To | VCC = 1.0V; guarantees deterministic reset state during deep brownout or battery depletion. |
| Hysteresis | 0.02–0.03 × VTH−; eliminates oscillation during slow-rising/falling supply rails. |
| MR Input Threshold | VIL = 0.6V, VIH = 0.7×VCC; compatible with standard CMOS/TTL logic levels. |
| MR Pulldown Resistance | 80kΩ internal; allows MR pin to float unconnected when unused. |
| Operating Temp Range | −40°C to +85°C; qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
MAX6806US46 is supplied in a 4-pin SOT143 package (JEDEC MO-178AA), with exposed pad not electrically connected. This compact surface-mount package supports high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; sinks current when asserted; valid to VCC = 1.0V. |
| 2 | GND | Analog ground reference; must be tied to system ground plane for accurate threshold sensing. |
| 3 | VCC | Power supply input; accepts 1.0V–5.5V; powers internal comparator and output stage. |
| 4 | MR | Active-high manual reset input; internally pulled down by 80kΩ; asserts RESET when driven ≥0.7×VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Preset 4.6V Threshold | Eliminates external resistor dividers and calibration, reducing BOM count and layout area. |
| Integrated Manual Reset (MR) | Enables operator-initiated or test-system-triggered reset without additional logic or switches beyond a momentary contact. |
| 35µA Supply Current | Minimizes quiescent power draw in always-on monitoring circuits, critical for battery longevity. |
| 1.0V Minimum VCC Operation | Ensures reset remains asserted through full battery discharge, preventing undefined µP states. |
| Internal Hysteresis | Prevents false resets during marginal supply conditions, improving system reliability without external components. |
Applications
| Portable/Battery-Powered Equipment | Intelligent Instruments |
|---|---|
|
Use Scenario: Handheld barcode scanners powered by single-cell Li-ion batteries experiencing voltage sag under motor load. IC Role / Device Role / Timing Role: Voltage detector asserting RESET when VCC drops below 4.6V during transient load, halting processor execution before data corruption. Use Value: Prevents firmware crash and memory corruption during battery brownout, extending usable runtime per charge cycle. |
Use Scenario: Portable multimeter with µC-based measurement engine requiring clean power-up initialization. IC Role / Device Role / Timing Role: Supervisory IC generating precise power-on reset pulse after VCC stabilizes above 4.6V, ensuring ADC and display controller initialize synchronously. Use Value: Guarantees deterministic boot sequence and eliminates need for RC-based reset timing networks. |
| Critical µP and µC Systems | Controllers |
|
Use Scenario: Industrial PLC I/O module with ARM Cortex-M3 core operating from regulated 5V rail subject to EMI-induced dips. IC Role / Device Role / Timing Role: Precision reset supervisor detecting sub-threshold excursions and asserting immediate active-low RESET to hold µP in reset until recovery. Use Value: Provides immunity to short-duration transients (<100µs at 100mV overdrive), avoiding spurious reboots. |
Use Scenario: HVAC zone controller using 8-bit MCU with bidirectional reset pin shared across multiple peripherals. IC Role / Device Role / Timing Role: Dedicated reset source with push-pull output isolating reset signaling from bus contention risks. Use Value: Eliminates need for open-drain arbitration or external pull-ups on shared reset line, simplifying interface design. |
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 uses internal watchdog timer and lacks MR pin; 1.2µA supply current. | Designed for watchdog + reset dual-function; unsuitable where manual reset is required. | Select MAX6806US46 when MR functionality and push-pull drive are mandatory; choose MAX6326UR46-T only if ultra-low current and watchdog capability are priorities. |
| TPS3808G33DBVR | 3.3V threshold (not 4.6V); adjustable via external resistor; no MR pin; 16µA supply current. | Requires external components for threshold setting; incompatible for fixed 4.6V monitoring without redesign. | MAX6806US46 is preferred for drop-in replacement in existing 4.6V designs; TPS3808G33DBVR suits new designs needing programmable thresholds. |
Compared with MAX6326UR46-T and TPS3808G33DBVR, the MAX6806US46 uniquely combines fixed 4.6V accuracy, integrated MR, push-pull output, and 1.0V operational floor - making it irreplaceable in legacy or space-constrained battery-powered systems requiring manual reset capability.
Availability
MAX6806US46 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, critical µP/µC systems, and industrial controllers requiring stable component supply and long-term lifecycle support.
Supply support for MAX6806US46 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX6806 series belongs to Maxim's precision voltage supervisor product line, engineered specifically for low-power, high-accuracy power-monitoring in resource-constrained embedded systems where reliability and minimal external components are essential.
FAQ
What is the reset threshold voltage of the MAX6806US46?
The MAX6806US46 has a factory-trimmed reset threshold of 4.60V with ±2% accuracy (4.508V to 4.692V at +25°C). This threshold is guaranteed over the full −40°C to +85°C temperature range, with a tempco of 30ppm/°C, making it suitable for stable 5V system monitoring without external calibration.
Does the MAX6806US46 support manual reset functionality?
Yes, the MAX6806US46 includes a dedicated MR (manual reset) input on Pin 4 of its SOT143 package. When driven high (≥0.7×VCC), MR forces RESET low regardless of VCC level. An internal 80kΩ pulldown resistor allows the pin to float safely when unused, simplifying design in applications requiring field-service or test-mode reset.
What is the minimum supply voltage at which MAX6806US46 guarantees valid RESET output?
The MAX6806US46 guarantees valid active-low RESET output down to VCC = 1.0V. Below this, the output becomes high-impedance. This feature ensures deterministic reset behavior during deep battery discharge or severe brownout, unlike many competitors that cease operation above 1.5V.
How does the hysteresis in MAX6806US46 improve system reliability?
The MAX6806US46 incorporates internal hysteresis of 0.02–0.03 × VTH−, creating distinct rising (VTH+) and falling (VTH−) trip points. This prevents output oscillation when VCC lingers near the 4.6V threshold due to noise or slow ramping, eliminating false resets and ensuring clean, glitch-free reset assertion and release.
Can MAX6806US46 replace MC33064-based circuits?
No - the MAX6806US46 is not pin-compatible with MC33064. While the 8-pin µMAX/SO variants of MAX6806 are pin-compatible with MC33064/MC34064, the MAX6806US46 uses a 4-pin SOT143 package with MR functionality absent in MC33064. Direct replacement requires PCB layout change and verification of MR integration.
MAX6806US46 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
MAX6806US46 FAQ
1.How can I place an order for MAX6806US46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806US46 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 MAX6806US46 reliable?
The price and inventory of MAX6806US46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806US46 is usually 5 days.
3.What payment methods are accepted for MAX6806US46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806US46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806US46?
MAX6806US46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806US46 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 MAX6806US46?
For technical support, including MAX6806US46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806US46 requirements.
6.How does Aetrix verify that MAX6806US46 is sourced from the original manufacturer or authorized distributors?
All MAX6806US46 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 MAX6806US46 meets industry standards.
7.What is the process for return or replacement of MAX6806US46?
All MAX6806US46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806US46, 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 MAX6806US46 part is unused and in its original packaging.
Return procedure for MAX6806US46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6806US46 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
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APX803L20-29SA-7
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V6340RSP3B+
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EM6325CXSP5B-2.9+
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MCP120T-315I/TT
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