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Analog Devices Inc./Maxim Integrated MAX6706ALKA
- Part No.:
- MAX6706ALKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706ALKA.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
MAX6706ALKA from Maxim Integrated is an active-high push-pull microprocessor supervisory IC that monitors a single supply voltage, provides independent power-fail detection (0.62V threshold), manual reset input with 50kΩ internal pullup, and a 1.6s watchdog timer with independent WDO output. It operates from 2.1V to 5.5V and guarantees valid reset assertion down to VCC = 1V, suited for industrial controllers requiring reliable brownout and watchdog supervision.
For engineers reviewing the MAX6706ALKA datasheet, MAX6706ALKA pinout, MAX6706ALKA application, or MAX6706ALKA equivalent, key selection criteria include its active-high RESET output configuration, SOT23-8 package compatibility, guaranteed operation at VCC ≥ 1V, 140ms reset timeout, and independent PFI/PFO comparator for early power-fail warning in embedded systems.
Technical Context
The MAX6706ALKA implements a dual-comparator architecture: one dedicated to VCC monitoring with a factory-trimmed threshold (4.63V for suffix 'L'), and a second high-impedance comparator with 0.62V reference connected to PFI for external voltage monitoring. Its watchdog circuit resets on WDI edge transitions and latches WDO low only upon timeout - unlike non-A versions, WDO deasserts immediately when VCC recovers above threshold.
Reset generation uses an internal 140ms timeout timer triggered by VCC falling below threshold, MR assertion, or watchdog overflow. The active-high RESET output is push-pull, sourcing up to 800µA at VCC ≥ 4.75V and sinking 3.2mA while asserted, enabling direct interface with µP reset inputs without external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Output Type | Active-high push-pull: drives high during normal operation; eliminates need for external pull-up resistor on µP reset line. |
| VCC Reset Threshold | 4.63V (min 4.47V, max 4.78V at -40°C to +125°C): precise supervision of +5V rails with ±1.5% tolerance over full temperature range. |
| Power-Fail Threshold | 0.62V (typ) with 6mV hysteresis: enables accurate early-warning detection of secondary supplies via external resistive divider. |
| Reset Timeout Period | 140ms (min 120ms, max 300ms): ensures µP completes boot sequence before release, compatible with typical ARM/Cortex startup timing. |
| Watchdog Timeout | 1.6s (min 0.96s, max 2.52s): configurable window for firmware health checks; WDO asserts low on timeout and deasserts on VCC recovery or WDI edge. |
| Supply Voltage Range | 1.2V to 5.5V: supports operation during deep brownout conditions and enables use with low-voltage logic domains. |
| Quiescent Current | 9µA (typ at VCC = 3.3V): ultra-low power consumption suitable for battery-backed or energy-sensitive applications. |
Pinout & Package
MAX6706ALKA is housed in an 8-pin SOT23-8 package (JEDEC MO-178 BA variant, drawing 21-0078F), measuring 3.00mm × 1.75mm × 1.30mm, with gull-wing leads and RoHS-compliant lead-free option available (suffix +T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup to VCC; pulling low forces active-high RESET assertion for 140ms after release. |
| 2 VCC | Main supply input | Primary power source for internal circuitry and push-pull RESET/WDO/PFO outputs; monitored for reset generation. |
| 3 GND | Ground reference | Common return path for all internal comparators, timers, and output drivers; must be low-impedance for noise immunity. |
| 4 PFI | Power-fail input | High-impedance comparator input referenced to 0.62V internal bandgap; accepts external voltage divider for custom trip points. |
| 5 PFO | Power-fail output | Active-low open-drain output asserting when PFI < 0.62V; requires external pull-up for interrupt signaling to µP. |
| 6 WDI | Watchdog input | Edge-triggered input; rising or falling edge clears watchdog timer; pulses as short as 50ns are recognized. |
| 7 RESET | Active-high reset output | Push-pull output driving high during normal operation; goes low only during reset events (VCC brownout, MR, or watchdog). |
| 8 WDO | Watchdog output | Active-low push-pull output asserting on watchdog timeout; deasserts immediately upon VCC recovery or valid WDI edge. |
Key Features
| Feature | Design Value |
|---|---|
| Active-high push-pull RESET | Eliminates external pull-up resistor requirement and ensures deterministic reset state during power ramp-up and brownout. |
| Independent PFI/PFO comparator | Enables early power-fail warning on secondary supplies (e.g., I/O or analog rails) without affecting primary VCC reset behavior. |
| A-version watchdog behavior | WDO deasserts immediately upon VCC recovery - no timeout delay - improving system responsiveness after transient undervoltage. |
| Guaranteed operation down to VCC = 1V | Ensures valid RESET assertion even during severe brownout, preventing µP from executing corrupted code below safe voltage. |
| Immunity to short VCC transients | Rejects fast dips ≤100ns, avoiding false resets caused by switching noise or load transients on the supply rail. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Supervises main 5V microcontroller supply and 3.3V CAN transceiver rail in harsh EMI environments with wide temperature swings. IC Role / Device Role / Timing Role: Monitors VCC for brownout, uses PFI to track 3.3V rail via resistor divider, asserts RESET and PFO to trigger orderly shutdown before voltage collapse. Use Value: Prevents spurious CAN bus errors and EEPROM corruption by ensuring µP remains held in reset until both supplies stabilize above 4.47V and 3.17V respectively. |
Use Scenario: Embedded in door module controlling window lift, mirror adjustment, and interior lighting with battery backup. IC Role / Device Role / Timing Role: Provides VCC supervision and watchdog monitoring of the main MCU; PFO triggers NMI interrupt to save seat position data prior to ignition-off power loss. Use Value: Guarantees 140ms reset hold time during stop-start engine cycles and enables graceful state preservation using the 0.62V PFI comparator's low-threshold sensitivity. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures fail-safe operation of safety-critical dosing controller powered from isolated DC-DC converter. IC Role / Device Role / Timing Role: Uses MR input for emergency stop button, watchdog to verify motor control loop execution, and active-high RESET to prevent accidental startup. Use Value: Meets IEC 62304 Class C requirements via guaranteed VCC ≥ 1V reset validity and 1.6s watchdog window aligned with pump cycle timing. |
Use Scenario: Supervises metrology SoC and communication subsystem (PLC/RF) in utility-grade meter with tamper detection. IC Role / Device Role / Timing Role: Monitors main 3.3V supply and auxiliary 1.8V RTC rail; PFO interrupts µP to log last valid kWh reading before capacitor backup depletion. Use Value: Enables >10-year field reliability with <9µA quiescent current and 60ppm/°C reset threshold drift, meeting ANSI C12.20 accuracy mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706LKA | Non-A version: WDO latches low until WDI edge or MR assertion; no automatic deassertion on VCC recovery. | Suitable where watchdog fault persistence is required across brief supply interruptions. | Select MAX6706LKA only if system design depends on sustained WDO assertion during intermittent brownouts. |
| TPS3808G33DBVR | TI part with 3.3V fixed reset threshold, 200ms timeout, no PFI/PFO, no watchdog output - only MR and RESET. | Lacks power-fail warning and independent watchdog signaling; limited to single-rail supervision. | Choose TPS3808G33DBVR only when cost sensitivity outweighs need for PFI-based predictive shutdown and dual-output watchdog capability. |
Compared with MAX6706LKA and TPS3808G33DBVR, the MAX6706ALKA uniquely combines active-high RESET, A-version adaptive WDO behavior, and integrated PFI/PFO - enabling robust, predictive power management in space-constrained industrial and automotive designs without adding discrete comparators or timers.
Availability
MAX6706ALKA is available at Aetrix Electronics and suitable for industrial controllers, automotive body electronics, medical infusion pumps, and smart energy meters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX6706ALKA 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, automotive, and communications markets, emphasizing high reliability, low power, and small-footprint solutions.
The MAX6701–MAX6708 family was engineered specifically for microprocessor supervision in space-constrained, mission-critical systems - integrating reset, watchdog, and power-fail functions into a single 8-pin SOT23 package.
FAQ
What is the reset threshold voltage for MAX6706ALKA?
The MAX6706ALKA has a factory-trimmed VCC reset threshold of 4.63V (minimum 4.47V, maximum 4.78V over -40°C to +125°C). This value is defined by the 'L' suffix in the part number and is optimized for reliable supervision of standard +5V microprocessor rails under worst-case temperature and voltage conditions.
Does MAX6706ALKA support active-high reset output?
Yes, the MAX6706ALKA features an active-high push-pull RESET output - meaning it drives high during normal operation and goes low only during reset events. This eliminates the need for an external pull-up resistor and ensures deterministic reset behavior during power-up, brownout, and manual reset assertion.
How does the watchdog behavior differ between MAX6706ALKA and MAX6706LKA?
The MAX6706ALKA watchdog output (WDO) deasserts immediately when VCC rises above threshold after a brownout, whereas the MAX6706LKA holds WDO low until a WDI edge or MR assertion occurs. This A-version behavior enables faster system recovery and avoids unnecessary NMI interrupts during transient supply dips.
Can MAX6706ALKA monitor voltages other than VCC?
Yes, the MAX6706ALKA includes a dedicated PFI input with a 0.62V internal reference, allowing external resistor dividers to configure supervision of secondary supplies (e.g., 3.3V, 2.5V, or 1.8V rails). The corresponding PFO output provides active-low interrupt signaling for early power-fail response.
What is the guaranteed operating voltage range for MAX6706ALKA?
The MAX6706ALKA operates from 1.2V to 5.5V and guarantees valid RESET assertion down to VCC = 1V. This extended low-voltage capability ensures reliable microprocessor hold-down during deep brownout conditions, preventing execution of invalid instructions in safety-critical applications.
MAX6706ALKA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.63V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6706ALKA FAQ
1.How can I place an order for MAX6706ALKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706ALKA 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 MAX6706ALKA reliable?
The price and inventory of MAX6706ALKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706ALKA is usually 5 days.
3.What payment methods are accepted for MAX6706ALKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706ALKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706ALKA?
MAX6706ALKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706ALKA 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 MAX6706ALKA?
For technical support, including MAX6706ALKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706ALKA requirements.
6.How does Aetrix verify that MAX6706ALKA is sourced from the original manufacturer or authorized distributors?
All MAX6706ALKA 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 MAX6706ALKA meets industry standards.
7.What is the process for return or replacement of MAX6706ALKA?
All MAX6706ALKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706ALKA, 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 MAX6706ALKA part is unused and in its original packaging.
Return procedure for MAX6706ALKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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