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Analog Devices Inc./Maxim Integrated MAX6707MKA+T
- Part No.:
- MAX6707MKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6707MKA+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,684
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Product details
Overview
MAX6707MKA+T from Maxim Integrated is a single-supply microprocessor supervisory IC in 8-pin SOT23 package, providing active-low open-drain reset output, independent watchdog timer with 1.6s timeout, adjustable power-fail comparator (0.62V threshold), and manual reset input. It monitors +2.55V to +3.6V supply rails and guarantees valid reset down to VCC = 1.2V for industrial embedded controllers.
For engineers reviewing the MAX6707MKA+T datasheet, MAX6707MKA+T pinout, MAX6707MKA+T application, or MAX6707MKA+T equivalent, key selection criteria include its open-drain RESET/WDO outputs, PFI/PFO interface for early power-fail warning, -40°C to +125°C operating range, and compatibility with multivoltage µP systems requiring brownout protection and watchdog supervision.
Technical Context
The MAX6707MKA+T implements a dual-comparator architecture: one fixed-threshold monitor for VCC (set by suffix 'M' = 4.38V nominal) and one externally adjustable 0.62V reference comparator for PFI. Its watchdog circuit asserts WDO low after 1.6s of no WDI edge transition and clears only on rising/falling WDI edges or MR assertion.
Reset generation uses a 140ms timeout delay after VCC rises above threshold or MR deasserts; the open-drain RESET and WDO outputs support flexible pull-up configurations, while PFO provides active-low power-fail warning synchronized to PFI voltage crossing 0.62V ±9mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 5.5V - supports operation during brownout down to 1.2V while maintaining guaranteed reset validity |
| VCC Reset Threshold | 4.22V (min) to 4.53V (max) at -40°C to +125°C - 'M' suffix specifies 4.38V nominal for +5V system monitoring |
| Reset Timeout Period | 120ms to 300ms - ensures µP remains held in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 0.96s to 2.52s over temperature - provides reliable software activity monitoring without false triggers |
| PFI Threshold Accuracy | 593mV to 642mV over full temp range - enables precise power-fail warning before regulator dropout |
| Supply Current | 9µA to 20µA at VCC < 3.6V - ultra-low quiescent current suitable for battery-backed or energy-sensitive systems |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood, industrial control, and telecom infrastructure use |
Pinout & Package
Package: 8-pin SOT23 (K8+2 outline), RoHS-compliant lead-free, surface-mountable with 0.65mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup; pulling low forces reset and clears watchdog timer |
| 2 VCC | Primary supply voltage input | Power source for internal circuitry and reset threshold detection; monitored for brownout at 4.38V nominal |
| 3 GND | Ground reference | Common return path for all analog and digital functions; required for accurate threshold comparison |
| 4 PFI | Power-fail input | High-impedance comparator input referenced to 0.62V; accepts external resistive divider for custom trip points |
| 5 PFO | Power-fail output | Open-drain active-low output asserting when PFI falls below 0.62V; used for µP interrupt or orderly shutdown |
| 6 N.C. | No connection | Not internally bonded; must be left floating or tied to GND per layout best practices |
| 7 RESET | Active-low reset output | Open-drain output requiring external pullup; holds µP in reset during power-up, brownout, or MR assertion |
| 8 WDO | Active-low watchdog output | Open-drain output asserting after 1.6s WDI inactivity; independent of RESET and usable as NMI signal |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1.2V | Ensures deterministic µP reset behavior even during deep brownout conditions before supply collapse |
| Independent watchdog output (WDO) | Enables non-reset critical fault reporting (e.g., NMI) without interfering with primary reset timing |
| Adjustable power-fail comparator (PFI/PFO) | Allows early warning of impending power loss using external resistor network, supporting graceful shutdown |
| 140ms reset timeout delay | Meets JEDEC JESD8-12E requirements for minimum reset pulse width in µP systems |
| Immunity to short VCC transients | Rejects sub-10µs supply glitches, preventing spurious resets in noisy industrial environments |
Applications
| Industrial PLC Controllers | Telecom Line Cards |
|---|---|
Use Scenario: Real-time control logic in programmable logic controllers exposed to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Supervises +3.3V I/O rail and generates reset pulse on brownout; PFO triggers firmware-initiated safe state entry before power loss. Use Value: Prevents corrupted state machine transitions during undervoltage events, ensuring deterministic fail-safe behavior per IEC 61508 SIL-2 requirements. |
Use Scenario: High-density line cards in central office switches requiring uninterrupted operation across AC mains fluctuations. IC Role / Device Role / Timing Role: Monitors +5V system supply and secondary +3.3V core rail via PFI divider; WDO feeds NMI to ARM processor for watchdog-triggered diagnostics. Use Value: Enables autonomous recovery from software hangs without requiring external supervisor intervention or system reboot. |
| White Goods Main Control Boards | Networking Equipment Power Management |
Use Scenario: Washing machine/dishwasher main boards with variable-speed motor drives causing supply ripple. IC Role / Device Role / Timing Role: Provides reset hold time during compressor startup surges; MR interface connects to front-panel reset button with hardware debouncing. Use Value: Eliminates need for RC-based reset circuits, reducing BOM count and improving long-term reliability in humid environments. |
Use Scenario: 1U rack-mounted routers with multiple DC-DC converters supplying FPGA, PHY, and memory subsystems. IC Role / Device Role / Timing Role: Uses PFI to monitor +12V intermediate bus; PFO asserts interrupt to baseboard management controller (BMC) for predictive power-loss handling. Use Value: Extends system uptime by enabling preemptive traffic rerouting and cache flush before complete power failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6707AKA+T | A-version with nonlatching WDO: deasserts immediately when undervoltage ends; standard version latches until WDI toggle | Suitable where transient brownouts require immediate WDO recovery without software intervention | Select MAX6707AKA+T if system requires automatic WDO release after supply recovery, not just watchdog timeout clearing |
| TPS3808G33DBVR | TI part with 3.3V fixed reset threshold, 200ms timeout, push-pull RESET, no PFI/PFO or watchdog output | Lacks power-fail warning and independent watchdog - limited to basic supply monitoring only | Choose TPS3808G33DBVR only when design needs simple 3.3V reset without PFI, PFO, or WDO functionality |
Compared with MAX6707MKA+T, MAX6707AKA+T offers faster WDO recovery after supply transients but requires WDI toggling to clear watchdog timeout, while TPS3808G33DBVR reduces feature set to basic reset generation-making it unsuitable for applications needing power-fail warning or independent watchdog signaling.
Availability
MAX6707MKA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, telecom line cards, white goods main control boards, and networking equipment power management requiring stable component supply across extended temperature ranges.
Supply support for MAX6707MKA+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 demanding industrial, automotive, and communications applications.
The MAX6701–MAX6708 family delivers integrated µP supervision with reset, watchdog, and power-fail functions in space-constrained SOT23 packages for high-reliability embedded systems.
FAQ
What is the reset threshold voltage for MAX6707MKA+T?
The MAX6707MKA+T has a VCC reset threshold of 4.22V (minimum) to 4.53V (maximum) over -40°C to +125°C, with a nominal value of 4.38V specified by the 'M' suffix. This threshold is factory-trimmed and guaranteed across temperature, making it suitable for monitoring +5V supply rails in industrial environments where brownout detection must remain accurate despite thermal drift.
Does MAX6707MKA+T support power-fail warning functionality?
Yes, MAX6707MKA+T includes a dedicated power-fail comparator with PFI (power-fail input) and PFO (power-fail output). The internal 0.62V reference allows users to configure an external resistor divider on PFI to detect falling voltages on secondary rails. When PFI drops below 0.62V, PFO asserts low within 1µs, enabling µP interrupt-driven graceful shutdown before main supply collapse.
What is the watchdog timeout period for MAX6707MKA+T?
The watchdog timeout period for MAX6707MKA+T is 0.96s (minimum) to 2.52s (maximum) over the full -40°C to +125°C temperature range, with a typical value of 1.6s at +25°C. The timer resets on any rising or falling edge at WDI and asserts WDO low if no transition occurs within this window - providing robust software activity monitoring without false triggers from noise.
How does the manual reset (MR) pin function on MAX6707MKA+T?
The MR pin on MAX6707MKA+T is an active-low CMOS input with internal 50kΩ pullup to VCC. Pulling MR low forces both RESET and WDO low for the duration of the assertion plus the 140ms reset timeout period. It also clears the watchdog timer. Leaving MR unconnected or tying it to VCC disables manual reset, and the pin tolerates voltages up to VCC + 0.3V.
What package type and RoHS status does MAX6707MKA+T use?
MAX6707MKA+T uses an 8-pin SOT23 package (outline K8+2) with lead-free (RoHS-compliant) construction. The '+T' suffix explicitly denotes lead-free tape-and-reel packaging. The device meets JEDEC standards for moisture sensitivity level (MSL) 1 and supports reflow soldering per IPC/JEDEC J-STD-020.
MAX6707MKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.38V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6707MKA+T FAQ
1.How can I place an order for MAX6707MKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707MKA+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 MAX6707MKA+T reliable?
The price and inventory of MAX6707MKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707MKA+T is usually 5 days.
3.What payment methods are accepted for MAX6707MKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707MKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707MKA+T?
MAX6707MKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707MKA+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 MAX6707MKA+T?
For technical support, including MAX6707MKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707MKA+T requirements.
6.How does Aetrix verify that MAX6707MKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6707MKA+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 MAX6707MKA+T meets industry standards.
7.What is the process for return or replacement of MAX6707MKA+T?
All MAX6707MKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707MKA+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 MAX6707MKA+T part is unused and in its original packaging.
Return procedure for MAX6707MKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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