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Analog Devices Inc./Maxim Integrated MAX6806UA46
- Part No.:
- MAX6806UA46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806UA46.pdf
- Description:
- IC SUPERVISOR 1 CHAN 8UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,770
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Product details
Overview
MAX6806UA46 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 brownout detection in battery-powered instrumentation and embedded controllers.
For engineers reviewing the MAX6806UA46 datasheet, MAX6806UA46 pinout, MAX6806UA46 application, or MAX6806UA46 equivalent, this device serves as a low-power, high-accuracy supervisory solution for 5V digital systems requiring deterministic reset assertion during power-up, power-down, and transient undervoltage events.
Technical Context
The MAX6806UA46 implements a precision bandgap-based voltage comparator with built-in hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable reset transitions without oscillation near the 4.6V threshold. Its push-pull output drives logic-level loads directly without external pull-up components.
It operates across −40°C to +85°C with supply voltage range 1.0V to 5.5V, supports manual reset only in SOT143 packages (not applicable to µMAX), and asserts RESET immediately upon VCC falling below VTH− - with no programmable delay or timeout circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.60V ±2% (4.508V–4.692V at +25°C); ensures reset before 5V 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 logic-low output even during deep brownout, supporting fail-safe shutdown sequencing. |
| Hysteresis | 0.02–0.03 × VTH−; prevents chatter during slow-rising/falling VCC or noisy supply conditions. |
| Output Type | Active-low push-pull; eliminates need for external pull-up resistor and supports direct CMOS/TTL interface. |
| Operating Temp | −40°C to +85°C; qualified for industrial and commercial embedded applications without derating. |
| Package | 8-pin µMAX (maxim part code UA); 3mm × 3mm footprint, compatible with MC33064/MC34064 PCB layouts. |
Pinout & Package
MAX6806UA46 is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), pin-compatible with industry-standard 8-pin SO and legacy MC33064-family footprints. The package includes exposed pad for thermal enhancement and is RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | (RESET) | Active-low push-pull reset output; sinks current when asserted, sources weakly when deasserted (VOH ≥ 0.8×VCC). |
| 2 | VCC | Main supply input (1.0V–5.5V); powers internal comparator and output stage. |
| 3 | N.C. | No internal connection; must be left floating or tied to GND per layout best practice. |
| 4 | GND | Analog/digital ground reference; requires low-impedance connection to system ground plane. |
| 5–8 | N.C. | All four pins are not internally connected; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% threshold accuracy | Guarantees reset assertion within 92mV of 4.6V at +25°C, eliminating calibration overhead in 5V ±5% systems. |
| 35µA quiescent current | Reduces standby power by >90% vs. discrete resistor-zener solutions, critical for coin-cell or energy-harvesting designs. |
| Push-pull RESET output | Drives high-capacitance buses directly (e.g., µP reset lines) without external components or timing uncertainty. |
| Immunity to VCC transients | Rejects negative-going spikes ≤100mV/µs slew rate, preventing false resets during switching noise or load dumps. |
| 1.0V minimum VCC operation | Ensures valid reset signal through full discharge of backup capacitors or Li-ion cells down to end-of-life voltage. |
Applications
| Computers | Intelligent Instruments |
|---|---|
Use Scenario: Monitoring 5V rail in desktop motherboard power management circuits during cold boot and AC loss recovery. IC Role / Device Role / Timing Role: Voltage supervisor asserting hardware reset to CPU and chipset before VCC falls below 4.508V. Use Value: Prevents corrupted BIOS writes and state machine lockup by guaranteeing reset pulse width >30µs at all temperatures. |
Use Scenario: Power supervision in handheld multimeters and portable oscilloscopes powered by dual AA batteries. IC Role / Device Role / Timing Role: Detecting battery depletion before analog front-end or ADC performance degrades. Use Value: Enables graceful shutdown and data save using 35µA current draw - extending usable battery life by 20+ hours. |
| Critical µP and µC Systems | Portable/Battery-Powered Equipment |
Use Scenario: Reset coordination in medical infusion pumps where firmware integrity must be enforced after power interruption. IC Role / Device Role / Timing Role: Providing deterministic, hysteresis-stabilized reset signal to ARM Cortex-M0+ controller on 5V auxiliary rail. Use Value: Eliminates risk of metastability or partial execution by asserting RESET within 30µs of VCC crossing 4.508V (falling). |
Use Scenario: Supervising main 5V DC-DC output in barcode scanners subjected to frequent battery swaps and ESD events. IC Role / Device Role / Timing Role: Brownout detector immune to 100mV/µs transients induced by motor commutation or RF interference. Use Value: Maintains system reliability without software watchdog intervention, reducing firmware complexity and BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR46-T | Same 4.6V threshold, but adds 200ms reset timeout; 1.8V–5.5V VCC range; SC70-3 package. | Requires longer reset hold time; unsuitable where immediate reset release is needed post-brownout recovery. | Select MAX6326UR46-T only if system demands fixed-duration reset pulse; MAX6806UA46 preferred for minimal-delay response. |
| TPS3808G33DBVR | 3.3V threshold (not 4.6V); adjustable via external resistor; 1.8V–6.5V VCC; SOT23-6 package. | Cannot replace MAX6806UA46 without redesigning threshold network and PCB layout. | Choose TPS3808G33DBVR only for new designs needing programmable thresholds; MAX6806UA46 offers drop-in 4.6V accuracy with zero external parts. |
Compared with MAX6326UR46-T and TPS3808G33DBVR, the MAX6806UA46 delivers faster reset response, lower quiescent current, and true pin-compatible replacement for legacy MC33064-based µMAX layouts - making it optimal for cost-sensitive, space-constrained 5V supervisory upgrades.
Availability
MAX6806UA46 is available at Aetrix Electronics and suitable for computers, intelligent instruments, critical µP/µC systems, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6806UA46 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 markets.
The MAX6806 series belongs to Maxim's voltage supervisor product line, engineered specifically for accurate, low-power power-rail monitoring in microprocessor and microcontroller systems with tight voltage margins.
FAQ
What is the exact reset threshold voltage of MAX6806UA46 and how tightly is it specified?
The MAX6806UA46 has a nominal reset threshold of 4.60V, guaranteed over temperature and process to ±2% (4.508V to 4.692V at +25°C). This specification is factory-trimmed and tested - not dependent on external components - ensuring consistent behavior across production lots and operating conditions without user calibration.
Does MAX6806UA46 support manual reset functionality?
No, MAX6806UA46 does not support manual reset. Manual reset (MR) is only available in the 4-pin SOT143 package variants (e.g., MAX6806US46-T). The µMAX package (UA) used by MAX6806UA46 contains no MR pin - all pins 3, 5–8 are N.C., and only pins 1, 2, and 4 are functional.
What is the minimum supply voltage at which MAX6806UA46 guarantees a valid RESET output?
MAX6806UA46 guarantees a valid active-low RESET output down to VCC = 1.0V. Below this, the output becomes high-impedance. This allows reliable reset assertion during deep brownout scenarios common in battery-powered devices, where VCC may decay slowly from 5V to 1V before complete failure.
Can MAX6806UA46 replace MC33064 in existing designs?
Yes, MAX6806UA46 is pin-compatible with MC33064 in 8-pin µMAX and SO packages and provides superior accuracy (±2% vs. ±5%), lower supply current (35µA vs. ~100µA), and tighter hysteresis control. No PCB changes are required when upgrading from MC33064-4.5 to MAX6806UA46, provided the 4.6V threshold meets system margin requirements.
What package type and dimensions does MAX6806UA46 use?
MAX6806UA46 uses the 8-pin µMAX package (package code UA), measuring 3mm × 3mm with 0.5mm lead pitch and an exposed thermal pad. It matches the land pattern of MC33064/MC34064 in SO-8 and µMAX footprints, enabling drop-in replacement in space-constrained industrial PCBs.
MAX6806UA46 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
MAX6806UA46 FAQ
1.How can I place an order for MAX6806UA46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806UA46 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 MAX6806UA46 reliable?
The price and inventory of MAX6806UA46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806UA46 is usually 5 days.
3.What payment methods are accepted for MAX6806UA46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806UA46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806UA46?
MAX6806UA46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806UA46 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 MAX6806UA46?
For technical support, including MAX6806UA46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806UA46 requirements.
6.How does Aetrix verify that MAX6806UA46 is sourced from the original manufacturer or authorized distributors?
All MAX6806UA46 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 MAX6806UA46 meets industry standards.
7.What is the process for return or replacement of MAX6806UA46?
All MAX6806UA46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806UA46, 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 MAX6806UA46 part is unused and in its original packaging.
Return procedure for MAX6806UA46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6806UA46 Tags
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MIC826SYMT-TR
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