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Analog Devices Inc./Maxim Integrated MAX6706ASKA+
- Part No.:
- MAX6706ASKA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706ASKA+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,226
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Product details
Overview
MAX6706ASKA+ from Maxim Integrated is an active-high push-pull microprocessor supervisory IC designed for single-supply voltage monitoring in embedded systems. It provides a guaranteed-reset output with 2.63V threshold (S-suffix), 140ms reset timeout, independent power-fail comparator (PFI/PFO), manual reset input (MR), and 1.6s watchdog timer with independent WDO output. It operates across -40°C to +125°C and supports critical µP power monitoring in white goods and telecom infrastructure.
For engineers reviewing the MAX6706ASKA+ datasheet, MAX6706ASKA+ pinout, MAX6706ASKA+ application, or MAX6706ASKA+ equivalent, this page delivers verified functional identity, exact reset threshold and timing behavior, confirmed SOT23-8 package mapping, validated pin roles including active-high RESET and WDO, and two field-validated alternative parts with documented differences in reset polarity and watchdog behavior.
Technical Context
The MAX6706ASKA+ implements a dual-comparator architecture: one fixed-threshold monitor for VCC (2.63V) and a separate 0.62V reference-based comparator for PFI, enabling early power-fail warning. Its reset generator guarantees valid output down to VCC = 1V and includes immunity to short falling-VCC transients via internal hysteresis and timing control.
The integrated watchdog timer monitors WDI transitions with 1.6s timeout (typ), asserting WDO low on overflow; unlike non-A versions, the A-version deasserts WDO immediately when undervoltage clears or MR is pulsed - no timeout delay required. The active-high push-pull RESET output complements the open-drain or active-low variants in the family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (S-suffix), ±0.07V over -40°C to +125°C - sets precise brownout detection point for +2.5V/3.3V system rails |
| Reset Timeout Period | 140ms (min), 280ms (max) - ensures µP remains held in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over temperature - provides robust firmware activity supervision without false triggers |
| Power-Fail Threshold | 0.62V (typ), 6mV hysteresis - enables accurate external voltage-divider-based early-warning detection down to 0.62V |
| Supply Current | 9–20µA at VCC < 3.6V - ultra-low quiescent draw suitable for battery-backed or always-on monitoring |
| Operating Voltage Range | 1.2V to 5.5V - supports operation during deep brownout while maintaining reset validity |
| Output Type | Active-high push-pull RESET, active-low push-pull WDO - eliminates need for external pull-ups and simplifies µP NMI/interrupt interfacing |
Pinout & Package
MAX6706ASKA+ is housed in an 8-pin SOT23 package (package code K8+2), RoHS-compliant, with 0.65mm pitch and thermal pad omitted. Pin 1 is MR (manual reset input), Pin 2 is VCC, Pin 3 is GND, Pin 4 is PFI, Pin 5 is PFO, Pin 6 is WDI, Pin 7 is RESET (active-high push-pull), and Pin 8 is WDO (active-low push-pull).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; pulling low forces immediate RESET assertion and clears watchdog timer |
| 2 - VCC | Main supply and primary reset monitor input | Supplies internal circuitry and serves as reference for 2.63V reset threshold detection; valid down to 1.2V |
| 3 - GND | Ground reference | Common return for all analog and digital functions; must be low-impedance for noise immunity |
| 4 - PFI | Power-fail comparator input | High-impedance (±200nA leakage) node for external resistor divider; triggers PFO when voltage falls below 0.62V |
| 5 - PFO | Power-fail comparator output | Active-low push-pull output; asserts before main supply collapse to enable orderly µP shutdown or data save |
| 6 - WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets 1.6s watchdog timer; 50ns minimum pulse width detectable |
| 7 - RESET | Active-high reset output | Push-pull output asserted high during reset condition; drives µP's active-high reset pin directly without pull-up |
| 8 - WDO | Watchdog output | Active-low push-pull output; latched low on watchdog timeout or undervoltage; deasserts immediately on MR pulse or WDI edge (A-version) |
Key Features
| Feature | Design Value |
|---|---|
| Active-high push-pull RESET | Eliminates external pull-up resistor and ensures deterministic logic level for µPs requiring active-high reset assertion |
| Independent PFI/PFO comparator | Enables early power-fail warning with user-adjustable trip point using standard resistors - no additional IC needed |
| A-version watchdog behavior | WDO deasserts instantly upon recovery from undervoltage or MR pulse - avoids unnecessary system lockup during transient dips |
| Guaranteed reset validity to VCC = 1V | Maintains functional reset state during deep brownout, ensuring µP remains held until supply recovers sufficiently |
| Immunity to short falling-VCC transients | Internal filtering prevents false resets from brief supply glitches (<100ns), improving system robustness in noisy environments |
Applications
| Computers | Networking |
|---|---|
Use Scenario: Monitoring +3.3V I/O supply and +1.2V core rail in compact x86 or ARM-based industrial PCs. IC Role / Device Role / Timing Role: Primary supervisory IC providing active-high RESET to CPU and PFO-driven interrupt for graceful OS shutdown prior to power loss. Use Value: Prevents data corruption during unexpected AC dropout by triggering controlled save-and-halt sequence 10–20ms before VCC collapse. |
Use Scenario: Power supervision in 10G Ethernet line cards where +2.5V PHY supplies require brownout detection. IC Role / Device Role / Timing Role: Single-chip solution delivering synchronized RESET assertion and watchdog supervision for FPGA-based packet processors. Use Value: Reduces BOM count by replacing discrete reset + comparator + watchdog ICs; 140ms timeout matches typical PHY initialization timing. |
| White Goods | Telecommunications |
Use Scenario: Monitoring +5V MCU supply and +3.3V sensor interface rail in smart refrigerator control boards. IC Role / Device Role / Timing Role: Supervises main MCU and initiates fault logging via PFO-triggered interrupt when AC line sags below 90V. Use Value: Enables compliance with IEC 60335-1 by guaranteeing safe state entry within 100ms of brownout onset. |
Use Scenario: Base station controller board requiring reliable reset under wide-temperature (-40°C to +85°C) and variable input conditions. IC Role / Device Role / Timing Role: Provides temperature-stable 2.63V reset threshold and 1.6s watchdog supervision for ARM Cortex-M7 host processor. Use Value: Ensures 100% reset assertion reliability across full industrial temp range - validated per AEC-Q100 Class 2 stress profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706MTA+ | 2.55V reset threshold (M-suffix), same pinout and A-version watchdog behavior | Better suited for +2.5V-only systems; less margin for +3.3V rail tolerance drift | Select when system VCC nominal is 2.5V ±5% and tighter threshold accuracy is required |
| MAX6702ASA+ | Active-high push-pull RESET, but dual adjustable inputs (RST_IN1/RST_IN2) for triple-voltage monitoring | Supports monitoring of three independent rails (e.g., +5V, +3.3V, +1.8V); larger footprint (same SOT23-8 but different pin mapping) | Choose when multi-rail supervision is needed; note RST_IN1/RST_IN2 replace PFI/PFO functions |
Compared with MAX6706MTA+, MAX6706ASKA+ offers higher reset threshold margin for +3.3V systems; compared with MAX6702ASA+, it trades triple-rail flexibility for dedicated PFI/PFO functionality and simpler external component count in single-rail designs.
Availability
MAX6706ASKA+ is available at Aetrix Electronics and suitable for computers, networking equipment, and telecommunications infrastructure requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6706ASKA+ 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 power management, sensing, and connectivity in industrial, automotive, and communications systems.
The MAX6701–MAX6708 family targets cost-sensitive, space-constrained µP supervision applications where guaranteed reset timing, low IQ, and integrated watchdog/PFI functions reduce system-level complexity.
FAQ
What is the exact reset threshold voltage for MAX6706ASKA+ and how is it specified?
The MAX6706ASKA+ has a nominal reset threshold of 2.63V, corresponding to the 'S' suffix in its part number. This value is guaranteed over the full operating temperature range (-40°C to +125°C) with min/max limits of 2.55V and 2.70V at -40°C to +85°C, and 2.53V to 2.72V at -40°C to +125°C. The threshold is factory-trimmed and tested, not dependent on external components.
Does MAX6706ASKA+ support active-high reset output, and how does it behave during power-down?
Yes, MAX6706ASKA+ features an active-high push-pull RESET output. During power-down, RESET remains high until VCC falls below the 2.63V threshold, then transitions low and stays low until VCC drops below 1.0V. This guarantees known µP state through full brownout, and the output remains valid down to VCC = 1V per datasheet specification.
How does the watchdog timer in MAX6706ASKA+ differ from non-A versions like MAX6706?
The MAX6706ASKA+ watchdog deasserts WDO immediately when VCC recovers above threshold or when MR is pulsed - no timeout delay required. In contrast, non-A versions latch WDO low until a valid WDI edge occurs. This A-version behavior prevents spurious system lockup during brief supply dips and enables faster recovery without firmware intervention.
Can MAX6706ASKA+ monitor a secondary supply voltage, and what is the minimum detectable voltage at PFI?
Yes, MAX6706ASKA+ can monitor secondary supplies via the PFI pin, which has a fixed 0.62V internal reference. Using an external resistor divider, any supply ≥1.2V can be scaled down to trip at PFI. The PFI input leakage is ±200nA max at +125°C, enabling high-impedance dividers with >1MΩ resistors - supporting detection of voltages as low as 0.62V with appropriate scaling.
What package type and RoHS status does MAX6706ASKA+ use, and is thermal pad included?
MAX6706ASKA+ uses an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176) with lead(Pb)-free construction indicated by the '+' suffix. It conforms to RoHS Directive 2011/65/EU. The package has no exposed thermal pad - all thermal dissipation occurs through leads and die attach; maximum continuous power dissipation is 714mW at +70°C ambient.
MAX6706ASKA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, 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
MAX6706ASKA+ FAQ
1.How can I place an order for MAX6706ASKA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706ASKA+ 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 MAX6706ASKA+ reliable?
The price and inventory of MAX6706ASKA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706ASKA+ is usually 5 days.
3.What payment methods are accepted for MAX6706ASKA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706ASKA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706ASKA+?
MAX6706ASKA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706ASKA+ 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 MAX6706ASKA+?
For technical support, including MAX6706ASKA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706ASKA+ requirements.
6.How does Aetrix verify that MAX6706ASKA+ is sourced from the original manufacturer or authorized distributors?
All MAX6706ASKA+ 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 MAX6706ASKA+ meets industry standards.
7.What is the process for return or replacement of MAX6706ASKA+?
All MAX6706ASKA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706ASKA+, 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 MAX6706ASKA+ part is unused and in its original packaging.
Return procedure for MAX6706ASKA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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