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Analog Devices Inc./Maxim Integrated MAX6806UA26
- Part No.:
- MAX6806UA26
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6806UA26.pdf
- Description:
- IC SUPERVISOR 1 CHAN 8UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,953
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Product details
Overview
MAX6806UA26 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 guaranteed operation down to VCC = 1.0V - enabling reliable brownout detection in battery-powered embedded controllers and intelligent instruments.
For engineers reviewing the MAX6806UA26 datasheet, MAX6806UA26 pinout, MAX6806UA26 application, or MAX6806UA26 equivalent, key selection criteria include its 2.6V threshold accuracy, 35µA supply current, 8-pin µMAX package compatibility with MC33064-family layouts, and immunity to sub-100µs negative VCC transients.
Technical Context
The MAX6806UA26 implements a precision bandgap-based voltage comparator with internal hysteresis (VHYST = 0.02–0.03 × VTH−), ensuring stable reset assertion/deassertion during supply ramp-up and brownout conditions. Its push-pull output drives CMOS logic directly without external pullup components.
It operates across −40°C to +85°C with supply voltage range 1.0V to 5.5V, and integrates an 80kΩ internal MR pulldown resistor only in SOT143 variants - not applicable to the 8-pin µMAX-packaged MAX6806UA26. Reset delay is 30µs typical under 1mV/µs VCC fall rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.60V ±2% (VTH− at +25°C); ensures reset asserts before system ICs drop below 2.5V ±10% min operating voltage |
| Supply Current | 35µA typical at VCC = 3.6V; enables multi-year battery life in portable equipment |
| RESET Output Type | Active-low, push-pull; sinks/sourcing capability supports direct interface to µP reset pins without external components |
| VCC Operating Range | 1.0V to 5.5V; RESET remains valid down to 1.0V, critical for low-voltage brownout detection |
| Hysteresis | 0.02–0.03 × VTH−; prevents output chatter near threshold during slow-ramping or noisy supplies |
| Tempco | 30ppm/°C; maintains threshold stability over full −40°C to +85°C industrial temperature range |
| Power-Up Delay | 30µs typical; provides sufficient hold time for µP initialization after VCC exceeds threshold |
Pinout & Package
MAX6806UA26 is housed in an 8-pin µMAX package (outline 21-0036), pin-compatible with MC33064/MC34064 families. The package supports surface-mount assembly and thermal derating of 4.5mW/°C above +70°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | (RESET)/RESET | Active-low push-pull reset output; asserted low when VCC < 2.6V or during power-down |
| 2 | VCC | Main supply input; powers internal circuitry and defines reset threshold reference |
| 3 | N.C. | No internal connection; must be left unconnected or tied to GND per layout guidelines |
| 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% accurate reset threshold | Guarantees deterministic reset timing across voltage and temperature; eliminates need for calibration or trimming |
| No external components required | Reduces BOM count and PCB area vs. discrete resistor-divider + comparator solutions |
| Immunity to short VCC transients | Rejects negative-going transients ≤100µs (depending on overdrive), improving robustness in noisy power environments |
| Valid RESET down to VCC = 1.0V | Ensures system remains held in reset until supply collapses fully - critical for data integrity in flash writes |
| 8-pin µMAX pin compatibility | Enables drop-in replacement for legacy MC33064 designs without PCB redesign |
Applications
| Portable/Battery-Powered Equipment | Intelligent Instruments |
|---|---|
|
Use Scenario: Handheld barcode scanners powered by single-cell Li-ion batteries experiencing voltage sag during motor activation. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to halt MCU execution before brownout-induced corruption. Use Value: Prevents firmware crash and memory corruption during transient 2.4–2.7V dips, extending usable battery window. |
Use Scenario: Digital multimeter with auto-ranging ADC and EEPROM logging, requiring clean power-on reset sequencing. IC Role / Device Role / Timing Role: Precision reset supervisor ensuring µC initializes only after stable 2.6V rail is confirmed. Use Value: Eliminates spurious measurements caused by premature ADC sampling during power ramp. |
| Critical µP and µC Power Monitoring | Bar-Code Scanners |
|
Use Scenario: Industrial PLC controller with ARM Cortex-M4 core running real-time control loops. IC Role / Device Role / Timing Role: Primary reset source monitoring 3.3V domain; asserts RESET within 30µs of VCC falling below 2.6V. Use Value: Guarantees deterministic fail-safe state entry before logic levels become undefined. |
Use Scenario: Ruggedized warehouse scanner subjected to ESD and conducted noise on shared 5V bus. IC Role / Device Role / Timing Role: Immune voltage monitor rejecting 50ns–100µs VCC glitches while maintaining valid reset assertion. Use Value: Avoids false resets during cable coupling events, preserving scan session continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT26D3+ | Same 2.6V threshold, but uses 3-pin SOT23 package with open-drain output and no µMAX footprint compatibility | Lacks push-pull drive; requires external pullup; unsuitable for direct µP reset pin drive without level-shifting | Select when board space is constrained and open-drain flexibility (e.g., wired-OR reset buses) is needed |
| TPS3808G33DBVR | 2.93V fixed threshold (not 2.6V); 350ms programmable delay; higher quiescent current (1.1µA min, 12µA typ) | Designed for systems requiring long reset timeout; incompatible for fast-response brownout detection at 2.6V | Choose only if extended reset hold time and 2.93V threshold match system rail requirements |
Compared with MAX6806UA26, MAX6326UT26D3+ trades µMAX pin compatibility and push-pull drive for smaller footprint, while TPS3808G33DBVR replaces precision fast-reset functionality with programmable delay and higher threshold - neither offers direct functional or mechanical equivalence.
Availability
MAX6806UA26 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, intelligent instruments, critical µP and µC power monitoring, and bar-code scanners requiring stable component supply and long-term industrial lifecycle support.
Supply support for MAX6806UA26 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 and mixed-signal ICs for industrial, computing, and communications applications, with emphasis on high-reliability power management and sensing solutions.
The MAX6806 series belongs to Maxim's voltage supervisor product line, engineered specifically for accurate, low-power reset generation in resource-constrained embedded systems where supply margin is tight and layout space is limited.
FAQ
What is the exact reset threshold voltage of MAX6806UA26 and how tightly is it specified?
The MAX6806UA26 has a nominal reset threshold of 2.60V, guaranteed over temperature and process to ±2% (2.548V to 2.652V at +25°C). This tolerance is maintained across the full −40°C to +85°C operating range with a tempco of 30ppm/°C, making it suitable for systems using 2.5V ±10% rails where deterministic brownout response is essential. The MAX6806UA26 specification is factory-trimmed and does not require external calibration.
Does MAX6806UA26 support manual reset functionality?
No, the MAX6806UA26 in the 8-pin µMAX package does not include a manual reset (MR) input. Manual reset is only available on the 4-pin SOT143 variants (e.g., MAX6806US26-T), which feature an MR pin with internal 80kΩ pulldown. The MAX6806UA26 relies solely on VCC monitoring and has no provision for external reset initiation - its pinout contains five N.C. terminals and no MR connection.
Can MAX6806UA26 replace MC33064 in existing designs?
Yes, MAX6806UA26 is explicitly pin-compatible with MC33064, MC33164, MC34064, and MC34164 in the 8-pin µMAX and SO packages. Its 2.6V threshold, push-pull output, and 30µs reset delay match the functional envelope of those legacy parts, while offering improved accuracy (±2% vs. ±5%), lower supply current (35µA vs. ~100µA), and better transient immunity - making MAX6806UA26 a validated upgrade path without PCB changes.
What is the minimum VCC voltage at which MAX6806UA26 guarantees valid RESET output?
The MAX6806UA26 guarantees valid active-low RESET output down to VCC = 1.0V. Below this voltage, the output becomes high-impedance and may float. For applications requiring asserted RESET all the way to ground, a 100kΩ pulldown resistor on the RESET line is recommended. This 1.0V guarantee is a key differentiator versus competitors like MAX6326 (valid only down to VCC = 0.9V) and ensures safe shutdown in deep brownout conditions.
Is MAX6806UA26 compatible with 1.8V or 3.3V microcontrollers?
Yes, MAX6806UA26 operates from VCC = 1.0V to 5.5V and delivers a clean active-low RESET signal compatible with 1.8V, 2.5V, 3.3V, and 5V logic families. Its push-pull output drives low to <0.3V at 20µA sink current (VCC = 1.0V) and high to >0.8×VCC when deasserted - ensuring solid logic levels across all common µP supply voltages without level shifters. The MAX6806UA26 is widely deployed in mixed-voltage systems.
MAX6806UA26 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
MAX6806UA26 FAQ
1.How can I place an order for MAX6806UA26 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6806UA26 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 MAX6806UA26 reliable?
The price and inventory of MAX6806UA26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6806UA26 is usually 5 days.
3.What payment methods are accepted for MAX6806UA26?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6806UA26 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6806UA26?
MAX6806UA26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6806UA26 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 MAX6806UA26?
For technical support, including MAX6806UA26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6806UA26 requirements.
6.How does Aetrix verify that MAX6806UA26 is sourced from the original manufacturer or authorized distributors?
All MAX6806UA26 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 MAX6806UA26 meets industry standards.
7.What is the process for return or replacement of MAX6806UA26?
All MAX6806UA26 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6806UA26, 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 MAX6806UA26 part is unused and in its original packaging.
Return procedure for MAX6806UA26:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6806UA26 Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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