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Analog Devices Inc./Maxim Integrated MAX6706LKA-T
- Part No.:
- MAX6706LKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706LKA-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6706LKA-T 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 down to VCC = 1V, 140ms reset timeout delay, 1.6s watchdog timeout, 0.62V power-fail comparator input, and independent watchdog output - enabling reliable power-up sequencing and brownout protection in industrial controllers and telecom equipment.
For engineers reviewing the MAX6706LKA-T datasheet, MAX6706LKA-T pinout, MAX6706LKA-T application, or MAX6706LKA-T equivalent, this device supports precise +3.3V system supervision with manual reset input, power-fail warning capability, and watchdog timer functionality critical for fail-safe µP operation in white goods and networking infrastructure.
Technical Context
The MAX6706LKA-T implements a dual-comparator architecture: one fixed-threshold monitor for VCC (4.63V nominal) and a separate 0.62V reference-based comparator for PFI/PFO power-fail detection. Its active-high RESET output is driven by a push-pull stage, ensuring rail-to-rail logic levels without external pull-ups.
Watchdog functionality operates independently of reset generation: WDI edge detection clears a 1.6s timeout counter, and WDO asserts low on overflow or undervoltage events. MR input features internal 50kΩ pullup and 200ns glitch rejection, supporting robust pushbutton reset initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (nominal), ±3% over -40°C to +125°C - ensures stable reset assertion for +5V systems with margin against ripple |
| Reset Timeout Delay | 140ms (min) - guarantees sufficient hold time for µP initialization after power stabilization |
| Watchdog Timeout Period | 1.6s (typical), 0.96–2.52s over temperature - provides deterministic firmware activity monitoring window |
| Power-Fail Input Threshold | 0.62V (typical), 6mV hysteresis - enables accurate early-warning detection of supply droop via external resistor divider |
| Supply Current | 12–25µA at VCC < 5.5V - ultra-low quiescent draw suitable for battery-backed or energy-sensitive applications |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset output even during deep brownout conditions |
| Output Type | Active-high push-pull RESET, open-drain WDO and PFO - eliminates need for external pull resistors on RESET |
Pinout & Package
MAX6706LKA-T is housed in an 8-pin SOT23 package (package code K8+2), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant, with lead-free option available as MAX6706LKA+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR | Active-low manual reset input with internal 50kΩ pullup - debounced by reset timeout; forces RESET high when asserted |
| 2 | VCC | Main supply input and primary reset threshold monitor - powers all internal circuitry and defines reset trigger point |
| 3 | GND | Analog/digital ground reference - shared return path for comparators, timers, and output drivers |
| 4 | PFI | Power-fail input with 0.62V internal reference - accepts divided-down system voltage for pre-failure warning |
| 5 | PFO | Open-drain power-fail output - sinks current when PFI < 0.62V, usable for µP interrupt or sequencer control |
| 6 | WDI | Watchdog input - rising/falling edges clear 1.6s timer; static high/low triggers WDO assertion |
| 7 | RESET | Active-high push-pull reset output - drives high (≥0.8×VCC) when valid; no external pull required |
| 8 | WDO | Active-low open-drain watchdog output - asserts low on timeout or VCC/RST_IN undervoltage; independent of RESET state |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, preventing µP lockup below nominal supply |
| 140ms reset timeout with temperature compensation | Maintains consistent reset pulse width across -40°C to +125°C, eliminating timing drift in harsh environments |
| Independent watchdog output (WDO) | Allows NMI-triggered fault logging without interfering with main reset sequence or µP boot flow |
| 0.62V precision power-fail comparator | Enables accurate early-warning detection of supply collapse using high-impedance resistor dividers (nA leakage) |
| Immunity to short falling VCC transients | Rejects sub-100ns supply dips, preventing spurious resets in electrically noisy industrial or telecom power rails |
Applications
| Industrial Controllers | Telecom Power Management |
|---|---|
Use Scenario: Monitoring +5V and backup 3.3V rails in programmable logic controllers with watchdog-driven firmware recovery. IC Role / Device Role / Timing Role: Active-high RESET supervisor with independent WDO and PFO outputs coordinating power sequencing and fault reporting. Use Value: Prevents runaway execution during brownout via 4.63V threshold and delivers 140ms clean reset pulse for deterministic µP restart. |
Use Scenario: Providing fail-safe reset and power-fail warning in line-card power modules with hot-swap capability. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC monitor for main processor, PFI/PFO for DC-DC converter health signaling. Use Value: 0.62V PFI threshold enables early detection of regulator dropout; WDO feeds NMI for graceful shutdown before full power loss. |
| White Goods Control Boards | Networking Equipment |
Use Scenario: Ensuring reliable startup and brownout recovery in washing machine main control units with variable AC-DC conversion. IC Role / Device Role / Timing Role: Single-supply supervisor with MR input for service-mode reset and watchdog for motor control firmware integrity. Use Value: Internal 50kΩ MR pullup simplifies BOM; 1.6s watchdog timeout matches typical motor control loop cycle times. |
Use Scenario: Supervising FPGA configuration voltage and auxiliary supplies in enterprise switches with redundant power inputs. IC Role / Device Role / Timing Role: Primary reset generator for host processor and secondary PFO-driven interrupt for power-fail event logging. Use Value: Push-pull RESET eliminates external pull-up, reducing board space; PFO's 1µs propagation delay ensures timely µP notification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706AKA-T | A-version: WDO deasserts immediately upon VCC recovery (no timeout delay); standard version latches WDO until WDI toggle | Preferred where fast watchdog recovery is needed after transient undervoltage, not requiring full timeout reset | Select MAX6706AKA-T if system requires immediate WDO release post-brownout without waiting for WDI edge |
| TPS3808G33DBVR | TI part: 3.3V fixed threshold, 200ms reset timeout, no PFI/PFO, no watchdog output - only VCC monitoring | Suitable for simpler single-rail systems without power-fail warning or watchdog needs | Choose TPS3808G33DBVR only when PFI/PFO and WDO functions are unnecessary and 3.3V threshold suffices |
Compared with MAX6706LKA-T, the MAX6706AKA-T offers faster watchdog recovery but lacks latched fault indication, while TPS3808G33DBVR reduces feature set to basic reset-only supervision - making MAX6706LKA-T optimal for designs needing coordinated power-fail warning, watchdog, and active-high reset in one 8-pin SOT23 package.
Availability
MAX6706LKA-T is available at Aetrix Electronics and suitable for industrial controllers, telecom power management, and white goods requiring stable component supply with extended temperature support (-40°C to +125°C) and long-term production continuity.
Supply support for MAX6706LKA-T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX6701–MAX6708 family was designed specifically for compact, multivoltage microprocessor supervision in space-constrained embedded systems requiring precision reset, watchdog, and power-fail warning in a single SOT23 package.
FAQ
What is the reset threshold voltage of the MAX6706LKA-T?
The MAX6706LKA-T has a nominal reset threshold of 4.63V, with guaranteed limits of 4.47V (min) to 4.78V (max) over the full -40°C to +125°C operating temperature range. This fixed threshold is factory-trimmed and applies specifically to the VCC supply monitoring function of the MAX6706LKA-T.
Does the MAX6706LKA-T support active-high reset output?
Yes, the MAX6706LKA-T provides an active-high push-pull RESET output, as confirmed by its "H" designation in the ordering matrix and functional diagrams. This eliminates the need for external pull-up resistors and ensures strong logic-high drive capability up to 0.8×VCC under load.
What is the watchdog timeout period for the MAX6706LKA-T?
The MAX6706LKA-T features a watchdog timeout period of 1.6 seconds typical, with a guaranteed range of 0.96s to 2.52s across -40°C to +125°C. The timeout is cleared by any rising or falling edge on the WDI pin, and WDO asserts low upon overflow or VCC undervoltage.
Can the MAX6706LKA-T monitor power-fail conditions on a secondary voltage rail?
Yes, the MAX6706LKA-T includes a dedicated PFI input with a 0.62V internal reference, allowing external resistor dividers to scale any system voltage (e.g., 12V, 3.3V) down to the comparator threshold. PFO then provides an open-drain output for µP interrupt or sequencer control.
Is the MAX6706LKA-T compatible with lead-free soldering processes?
Yes, the MAX6706LKA-T is available in lead-free packaging; the "-T" suffix denotes tape-and-reel packaging, and lead-free compliance is achieved by ordering the "+T" variant (MAX6706LKA+T). The device supports standard reflow profiles per JEDEC J-STD-020.
MAX6706LKA-T 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
MAX6706LKA-T FAQ
1.How can I place an order for MAX6706LKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706LKA-T 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 MAX6706LKA-T reliable?
The price and inventory of MAX6706LKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706LKA-T is usually 5 days.
3.What payment methods are accepted for MAX6706LKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706LKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706LKA-T?
MAX6706LKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706LKA-T 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 MAX6706LKA-T?
For technical support, including MAX6706LKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706LKA-T requirements.
6.How does Aetrix verify that MAX6706LKA-T is sourced from the original manufacturer or authorized distributors?
All MAX6706LKA-T 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 MAX6706LKA-T meets industry standards.
7.What is the process for return or replacement of MAX6706LKA-T?
All MAX6706LKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706LKA-T, 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 MAX6706LKA-T part is unused and in its original packaging.
Return procedure for MAX6706LKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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