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Analog Devices Inc./Maxim Integrated MAX706SCUA
- Part No.:
- MAX706SCUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX706SCUA.pdf
- Description:
- IC SUPERVISOR MPU
- Quantity:
- Payment:
- Shipping:
Inventory:361
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Product details
Overview
MAX706SCUA from Maxim Integrated is an active-low microprocessor supervisory circuit in 8-pin µMAX package, providing reset generation (2.93V threshold), watchdog timer (1.6s timeout), power-fail warning (1.25V comparator), and manual-reset input for +3V/+3.3V systems. It ensures reliable boot-up and brownout recovery in portable instrumentation and battery-powered controllers.
For engineers reviewing the MAX706SCUA datasheet, MAX706SCUA pinout, MAX706SCUA application, or MAX706SCUA equivalent, this device delivers precision voltage monitoring, guaranteed RESET assertion down to VCC = 1V, TTL/CMOS-compatible manual reset, and integrated watchdog functionality - all critical for embedded system reliability validation and power-supply fault tolerance design.
Technical Context
The MAX706SCUA implements a dedicated reset generator with 200ms fixed delay, a 1.6s watchdog timer that resets on WDI transition and asserts WDO low on timeout, and a separate 1.25V reference-based power-fail comparator driving PFO. Its internal 70µA MR pullup enables direct pushbutton interfacing without external components.
All logic thresholds are specified across VCC = 3.0V to 5.5V, with reset threshold hysteresis of 20mV and guaranteed operation down to VCC = 1V for RESET assertion. The device uses CMOS process technology and is fully specified over 0°C to +70°C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (VCC falling); ensures reset assertion before 3.3V µP supply drops below operational minimum |
| Reset Pulse Width | 200ms typical; provides sufficient time for µP initialization and peripheral stabilization |
| Watchdog Timeout | 1.6s ±0.65s; allows robust software servicing window while preventing runaway execution |
| Supply Current | 100µA typical at VCC = 3.3V; enables long battery life in portable applications |
| PFI Threshold | 1.25V ±0.05V; supports accurate power-fail or low-battery detection via external resistor divider |
| MR Input Compatibility | TTL/CMOS; accepts direct connection to µP GPIO or mechanical switch without level-shifting |
| Operating Temperature | 0°C to +70°C; suitable for commercial-grade embedded control and instrumentation |
Pinout & Package
MAX706SCUA is housed in an 8-pin µMAX package (U8-1), measuring 3.0mm × 3.0mm × 0.8mm, with exposed pad for thermal enhancement and lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | Internally pulled up with 70µA; debounced by 200ms reset pulse; compatible with pushbutton or µP GPIO |
| 2 (VCC) | Positive supply input | Accepts 3.0V to 5.5V; guarantees RESET assertion down to VCC = 1V |
| 3 (GND) | Ground reference | Common return for all internal circuits and output sinks |
| 4 (PFI) | Power-fail comparator input | Compares against internal 1.25V reference; used for early-warning supply monitoring |
| 5 (PFO) | Active-low power-fail output | Sinks current when PFI < 1.25V; can interrupt µP or trigger backup sequence |
| 6 (WDO) | Active-low watchdog output | Goes low if WDI not toggled within 1.6s; also asserts during VCC brownout |
| 7 (RESET) | Active-low reset output | Asserted during power-up, brownout, or MR activation; 200ms deassertion delay |
| 8 (NC) | No connection | Not internally bonded; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset behavior even during deep brownout conditions |
| 200ms reset time delay | Eliminates need for external RC timing network; simplifies BOM and layout |
| Debounced manual reset input | 70µA internal pullup and 200ms pulse width suppress switch bounce without external filtering |
| 1.25V precision PFI threshold | Enables accurate low-battery detection or auxiliary supply monitoring with minimal external components |
| 100µA quiescent current | Extends battery runtime in always-on portable instruments and remote sensors |
Applications
| Battery-Powered Portable Instruments | Industrial Controller Power Monitoring |
|---|---|
Use Scenario: Handheld multimeter powered by dual AA cells with optional USB charging. IC Role / Device Role / Timing Role: Supervisory IC generating power-on reset, detecting battery depletion via PFI, and asserting early warning before shutdown. Use Value: Prevents corrupted EEPROM writes during low-voltage operation and extends usable battery life by triggering graceful shutdown at 2.93V. |
Use Scenario: PLC I/O module operating from 3.3V rail derived from isolated DC-DC converter. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and asserts RESET on brownout; uses WDO to detect firmware lockup in real-time control loop. Use Value: Guarantees safe state recovery within 200ms and prevents unsafe actuator commands during processor hang. |
| Embedded Computing Systems | Intelligent Sensor Nodes |
Use Scenario: Edge AI gateway using ARM Cortex-M7 MCU with dual supply (3.3V core, 5V I/O). IC Role / Device Role / Timing Role: Provides synchronized reset to both power domains; PFO monitors unregulated 12V input for AC adapter presence. Use Value: Enables seamless switchover between battery and wall power without µP corruption or boot failure. |
Use Scenario: Wireless environmental sensor node with ultra-low-power MCU and Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Generates cold-start reset, monitors battery voltage decay via PFI divider, and triggers data flush before cutoff. Use Value: Achieves >10-year field lifetime by minimizing quiescent current and enabling precise end-of-life prediction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706SEUA | Same functionality and pinout, but rated for -40°C to +85°C industrial temperature range | Required for outdoor or automotive-adjacent deployments where ambient exceeds +70°C | Select MAX706SEUA when extended temperature operation is mandatory; otherwise MAX706SCUA suffices for commercial environments. |
| TPS3808G33DBVR | TI part with 3.3V reset threshold, 200ms delay, no watchdog or PFI; SOT-23-6 package | Lacks watchdog and power-fail comparator; smaller footprint but reduced feature set | Choose TPS3808G33DBVR only if watchdog and PFI functions are unused and board space is constrained. |
Compared with MAX706SEUA, MAX706SCUA trades extended temperature support for lower cost and same core supervision features; compared with TPS3808G33DBVR, it adds watchdog and PFI capability at the expense of package size and vendor ecosystem.
Availability
MAX706SCUA is available at Aetrix Electronics and suitable for battery-powered equipment, portable instruments, and industrial controllers requiring stable component supply with consistent lead times and full traceability.
Supply support for MAX706SCUA 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 high-performance analog and mixed-signal ICs for power, interface, sensing, and timing applications.
The MAX706 family targets cost-sensitive, space-constrained embedded systems needing reliable power-supply monitoring and processor supervision - especially in portable, battery-operated, and industrial control environments.
FAQ
What is the reset threshold voltage for MAX706SCUA?
The MAX706SCUA has a nominal reset threshold of 2.93V (VCC falling), with ±0.08V tolerance and 20mV hysteresis. This value is factory-trimmed and guaranteed over temperature, ensuring reliable reset assertion before a 3.3V µP enters undefined operation. The threshold applies specifically to the 'S' variant and is distinct from the 2.63V (R) and 3.08V (T) versions.
Does MAX706SCUA include a watchdog timer?
Yes, MAX706SCUA includes a watchdog timer with a nominal timeout period of 1.6 seconds. The timer resets on any edge transition at the WDI pin and asserts the WDO output low if no transition occurs within the timeout window. Unlike the AP-series variants, the watchdog function in MAX706SCUA cannot be disabled - it remains active whenever VCC is above 3.0V.
What is the function of the PFI and PFO pins on MAX706SCUA?
PFI is the power-fail comparator input referenced to an internal 1.25V threshold; connecting it to a resistive divider enables monitoring of auxiliary supplies or battery voltage. PFO is the active-low open-drain output that asserts when PFI falls below 1.25V. Together, they provide early-warning capability for power-fail or low-battery conditions independent of the main VCC reset function.
Can MAX706SCUA operate from a 3.0V supply?
Yes, MAX706SCUA is fully specified for operation from VCC = 3.0V to 5.5V. At 3.0V, it delivers 100µA typical supply current, 200ms reset pulse width, and maintains valid logic levels on all outputs (RESET, WDO, PFO) with defined VOL and VOH. The 2.93V reset threshold ensures margin relative to the 3.0V supply during brownout.
What package type does MAX706SCUA use?
MAX706SCUA uses the 8-pin µMAX package (package code U8-1), a surface-mount package measuring 3.0mm × 3.0mm × 0.8mm with an exposed thermal pad. It is RoHS-compliant and lead-free, and shares pin compatibility with other MAX706 variants in SO and PDIP packages - though pin 8 is NC (no connection) in µMAX, unlike DIP/SO variants where it may be WDO or N.C. depending on suffix.
MAX706SCUA 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:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
MAX706SCUA FAQ
1.How can I place an order for MAX706SCUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX706SCUA 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 MAX706SCUA reliable?
The price and inventory of MAX706SCUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX706SCUA is usually 5 days.
3.What payment methods are accepted for MAX706SCUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX706SCUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX706SCUA?
MAX706SCUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX706SCUA 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 MAX706SCUA?
For technical support, including MAX706SCUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX706SCUA requirements.
6.How does Aetrix verify that MAX706SCUA is sourced from the original manufacturer or authorized distributors?
All MAX706SCUA 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 MAX706SCUA meets industry standards.
7.What is the process for return or replacement of MAX706SCUA?
All MAX706SCUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX706SCUA, 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 MAX706SCUA part is unused and in its original packaging.
Return procedure for MAX706SCUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX706SCUA Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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