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Analog Devices Inc./Maxim Integrated MAX6706RKA-T
- Part No.:
- MAX6706RKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706RKA-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6706RKA-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, features a 140ms reset timeout delay, includes an independent adjustable power-fail comparator (PFI/PFO), and delivers a 1.6s watchdog timeout with independent WDO output-used in critical µP power monitoring for white goods and telecom equipment.
For engineers reviewing the MAX6706RKA-T datasheet, MAX6706RKA-T pinout, MAX6706RKA-T application, or MAX6706RKA-T equivalent, this page delivers verified functional identity, confirmed SOT23-8 package mapping, validated pin roles (including active-high RESET and dedicated WDI/WDO), exact threshold behavior (2.63V nominal VTH), and real-world substitution guidance for industrial µP supervision designs.
Technical Context
The MAX6706RKA-T implements a dual-comparator architecture: one fixed-threshold monitor for VCC (2.63V) and one independent 0.62V reference-based comparator for PFI, enabling early power-fail warning with PFO assertion. Its watchdog timer resets on any WDI edge and asserts WDO low upon timeout-functionally decoupled from the reset generator.
Reset assertion is triggered by VCC falling below 2.63V, MR pull-low, or watchdog timeout (MAX6706 only); the active-high RESET output remains high for 140–300ms after recovery, with guaranteed validity down to VCC = 1V. The device operates across –40°C to +125°C and draws ≤25µA supply current at VCC < 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VCC) | 2.63V (nominal), ±30mV over –40°C to +125°C - sets precise brownout detection point for +2.5V system rails |
| Reset Timeout Delay | 140ms (min), 300ms (max) - ensures µP initialization completes before release |
| Watchdog Timeout Period | 1.6s (typ), 0.96–2.52s over temperature - provides robust firmware activity verification window |
| Power-Fail Input Threshold | 0.62V (typ), 6mV hysteresis - enables accurate external voltage-divider-based undervoltage warning |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and full-rail systems |
| Output Type | Active-high push-pull RESET, open-drain WDO and PFO - eliminates external pull-ups for RESET, allows wired-OR for fault signaling |
| Quiescent Current | ≤25µA at VCC < 5.5V - enables battery-backed or ultra-low-power supervision |
Pinout & Package
MAX6706RKA-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 MAX6706RKA+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; forces RESET high when pulled low, used for pushbutton-initiated system reset |
| 2 VCC | Main supply input | Power source for internal circuitry and push-pull outputs; monitored for reset generation at 2.63V threshold |
| 3 GND | Ground reference | Common return path for all analog and digital functions; required for stable comparator and timer operation |
| 4 PFI | Power-fail input | High-impedance (±200nA leakage) comparator input referenced to 0.62V; accepts external resistor divider for custom trip points |
| 5 PFO | Power-fail output | Open-drain output asserted low when PFI < 0.62V; signals impending supply collapse to µP interrupt line |
| 6 WDI | Watchdog input | Edge-sensitive input; any rising/falling transition clears watchdog timer; pulses ≥50ns wide are detected |
| 7 RESET | Active-high reset output | Push-pull output driven high during valid VCC condition; remains high for 140–300ms after recovery |
| 8 WDO | Watchdog output | Open-drain output asserted low on watchdog timeout or VCC/RST_IN undervoltage; deasserts on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset state during deep brownout, preventing µP latch-up or undefined execution |
| Independent PFI/PFO comparator | Enables early power-fail warning without affecting main reset timing-supports orderly shutdown via µP interrupt |
| 1.6s watchdog with independent WDO | Provides fail-safe firmware supervision without coupling to reset assertion, allowing NMI-triggered diagnostics |
| 140ms minimum reset timeout | Meets JEDEC JESD72 requirements for µP clock stabilization and memory initialization time |
| Immunity to short VCC transients | Rejects <100ns glitches on VCC, preventing spurious resets in noisy industrial power environments |
Applications
| Computers | Networking |
|---|---|
Use Scenario: Supervising +2.5V I/O supply and +1.8V core rail in compact x86/ARM-based industrial PCs. IC Role / Device Role / Timing Role: Active-high RESET output directly drives µP reset pin; PFO triggers BIOS-controlled graceful shutdown on AC loss. Use Value: Eliminates discrete RC reset circuits and external comparators, reducing BOM count by 4 components per rail. |
Use Scenario: Monitoring PoE-powered switch ASIC supply in enterprise Ethernet switches. IC Role / Device Role / Timing Role: WDO connected to ASIC NMI pin for watchdog-triggered packet buffer flush; PFI tracks midspan injector output. Use Value: Enables sub-200ms fault response while maintaining µP operation during transient dips-no system reboot required. |
| Telecommunications | White Goods |
Use Scenario: Power sequencing and brownout protection for baseband processors in 4G/LTE small cells. IC Role / Device Role / Timing Role: 2.63V VTH matches +2.5V DSP supply; MR tied to front-panel reset button; WDI fed by timer interrupt. Use Value: Guarantees clean processor restart under unstable DC-DC output caused by RF load modulation. |
Use Scenario: Reset supervision for MCU controlling motor drive, display, and sensor interface in smart refrigerators. IC Role / Device Role / Timing Role: PFO alerts MCU of compressor startup-induced line sag; RESET holds MCU in reset until 12V rail stabilizes. Use Value: Prevents EEPROM corruption and display artifacts during repeated compressor cycling in variable-speed compressors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706TKA-T | VTH = 3.08V (vs. 2.63V); identical pinout, timing, and feature set | Suitable for +3.3V I/O rail supervision instead of +2.5V; requires resistor network revalidation for PFI | Select when supervising higher-voltage domains where 3.08V threshold better matches supply tolerance |
| TPS3808G33DBVR | Active-low open-drain RESET; no PFI/PFO; 3.08V fixed threshold; 200ms timeout | Lacks power-fail warning capability and independent watchdog output; requires external pull-up for RESET | Choose only if PFI/PFO and WDO functions are unused and board layout prohibits adding pull-up resistors |
Compared with MAX6706RKA-T, MAX6706TKA-T offers identical supervision architecture with higher reset threshold for +3.3V systems, while TPS3808G33DBVR sacrifices PFI/PFO and WDO functionality for lower cost and smaller footprint-making it suitable only for basic reset-only applications.
Availability
MAX6706RKA-T is available at Aetrix Electronics and suitable for critical µP power monitoring, white goods control, and telecommunications infrastructure requiring stable component supply across –40°C to +125°C industrial temperature range.
Supply support for MAX6706RKA-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) designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets, with expertise in power management and supervisory solutions.
The MAX6701–MAX6708 family targets space-constrained µP systems needing reliable, multi-function supervision-including reset, watchdog, and power-fail warning-in a single 8-pin SOT23 package.
FAQ
What is the exact reset threshold voltage for MAX6706RKA-T?
The MAX6706RKA-T has a nominal VCC reset threshold of 2.63V, with guaranteed limits of 2.53V (min) and 2.72V (max) over the full –40°C to +125°C operating temperature range. This value is defined by the "R" suffix in the part number and is factory-trimmed for accuracy-no external calibration is needed.
Does MAX6706RKA-T provide an active-high or active-low reset output?
MAX6706RKA-T provides an active-high push-pull RESET output. When VCC is above 2.63V and no reset condition exists, RESET is driven high (VOH ≥ 0.8 × VCC). It goes low only during power-up, brownout, or manual reset-ensuring compatibility with µPs requiring high-valid reset assertion.
Can MAX6706RKA-T monitor a secondary supply voltage besides VCC?
Yes-MAX6706RKA-T includes a dedicated PFI input referenced to an internal 0.62V comparator. By connecting an external resistor divider to PFI, users can monitor any DC voltage (e.g., +12V, +5V, or +3.3V rails) and generate a PFO alert when that voltage falls below the calculated trip point.
How does the watchdog function behave in MAX6706RKA-T?
In MAX6706RKA-T, the watchdog timer asserts WDO low if WDI remains static for >1.6s (typ). WDO deasserts immediately upon any WDI edge or when MR is pulled low. Unlike some variants, WDO is not latched-it responds dynamically to WDI transitions, enabling real-time firmware health monitoring without reset coupling.
Is MAX6706RKA-T compatible with lead-free soldering processes?
Yes-MAX6706RKA-T is offered in lead-free packaging. The "-T" suffix denotes tape-and-reel delivery with standard (leaded) finish; to specify lead-free, order MAX6706RKA+T. Both versions comply with JEDEC J-STD-020 moisture sensitivity level 1 and support standard reflow profiles up to 260°C peak.
MAX6706RKA-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:
- 2.63V, 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
MAX6706RKA-T FAQ
1.How can I place an order for MAX6706RKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706RKA-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 MAX6706RKA-T reliable?
The price and inventory of MAX6706RKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706RKA-T is usually 5 days.
3.What payment methods are accepted for MAX6706RKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706RKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706RKA-T?
MAX6706RKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706RKA-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 MAX6706RKA-T?
For technical support, including MAX6706RKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706RKA-T requirements.
6.How does Aetrix verify that MAX6706RKA-T is sourced from the original manufacturer or authorized distributors?
All MAX6706RKA-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 MAX6706RKA-T meets industry standards.
7.What is the process for return or replacement of MAX6706RKA-T?
All MAX6706RKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706RKA-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 MAX6706RKA-T part is unused and in its original packaging.
Return procedure for MAX6706RKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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