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Analog Devices Inc./Maxim Integrated MAX6707ASKA
- Part No.:
- MAX6707ASKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6707ASKA.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
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Product details
Overview
MAX6707ASKA from Maxim Integrated is a single-supply microprocessor supervisory IC with active-low open-drain reset output, independent watchdog timer (1.6s timeout), adjustable power-fail comparator (0.62V reference), and manual reset input. It monitors +3.0V systems (3.08V reset threshold), operates from 2.55V to 3.6V, guarantees reset validity down to VCC = 1V, and is used in industrial controllers and embedded systems requiring reliable brownout detection and watchdog supervision.
For engineers reviewing the MAX6707ASKA datasheet, MAX6707ASKA pinout, MAX6707ASKA application, or MAX6707ASKA equivalent, this page delivers verified functional identity, SOT23-8 package mapping, confirmed 140ms reset timeout, 0.62V PFI threshold, and two validated alternative parts for voltage-monitoring supervisory circuits.
Technical Context
The MAX6707ASKA implements a precision undervoltage detector with fixed 3.08V VCC reset threshold (±3% over -40°C to +125°C), an independent 0.62V reference-based power-fail comparator with PFI/PFO interface, and a 1.6s watchdog timer that asserts WDO on timeout or VCC/RST_IN undervoltage. Its reset generator holds RESET low for 140–300ms after fault clearance.
It features active-low open-drain RESET and WDO outputs, internal 50kΩ MR pullup, and guaranteed operation down to VCC = 1.0V. The device is immune to short VCC transients and supports manual reset assertion via MR with 200ns delay and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ) at VCC falling; ±3% tolerance over full temperature range ensures stable trip point for +3.0V rail monitoring. |
| Reset Timeout Period | 140ms (min) to 300ms (max); provides sufficient hold time to guarantee µP initialization completes before release. |
| Watchdog Timeout | 1.6s (typ); detects µP lockup by requiring WDI toggle within this window-critical for fail-safe embedded control. |
| Power-Fail Threshold | 0.62V (typ) at PFI; enables early warning of supply collapse using external resistor divider for system-level power sequencing. |
| Supply Voltage Range | 2.55V to 3.6V; supports operation across entire +3.0V/3.3V logic family while maintaining reset accuracy. |
| Reset Output Type | Active-low open-drain; allows wired-OR configuration and level-shifting compatibility with diverse µP reset inputs. |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive, industrial PLC, and harsh-environment embedded applications. |
Pinout & Package
MAX6707ASKA is housed in an 8-pin SOT23-8 package (JEDEC MO-178 BA, 3.00mm × 1.75mm footprint) with exposed pad option not specified; lead-free variant available as MAX6707ASKA+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | CMOS-compatible active-low input with internal 50kΩ pullup; forces reset when pulled low; debounced by 140ms timeout. |
| 2 VCC | Supply Voltage Input | Primary power input (2.55V–3.6V); powers internal circuitry and sets reset threshold reference; valid reset asserted down to 1.0V. |
| 3 GND | Ground Reference | System ground return 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; accepts external resistive divider to monitor secondary supplies. |
| 5 PFO | Power-Fail Output | Active-low open-drain output; asserts when PFI falls below 0.62V-used for early-warning interrupt or cascaded reset initiation. |
| 6 WDI | Watchdog Input | Edge-sensitive input; requires rising/falling transition every ≤1.6s to prevent WDO assertion; 50ns minimum pulse width detectable. |
| 7 RESET | Reset Output | Active-low open-drain output; driven low during VCC brownout, MR assertion, or watchdog timeout; sinks ≥1.2mA at VCC ≥2.55V. |
| 8 WDO | Watchdog Output | Independent active-low open-drain output; asserts on WDI timeout or VCC/RST_IN undervoltage; deasserts on valid WDI edge or MR low. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Power-Fail Detection | 0.62V internal reference enables precise early-warning monitoring of any system voltage via external resistor divider. |
| Guaranteed Reset Below 1V | RESET remains valid and low down to VCC = 1.0V-ensures deterministic µP shutdown even during deep brownout. |
| Immunity to Short VCC Transients | Rejects glitches <100ns duration, preventing spurious resets in electrically noisy industrial environments. |
| Open-Drain Output Flexibility | Both RESET and WDO are open-drain, enabling wired-OR logic, multi-source reset arbitration, and mixed-voltage interfacing. |
| Low Quiescent Current | 9µA (typ) at 3.3V supply-reduces standby power in battery-backed or energy-sensitive embedded systems. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors main 3.0V microcontroller supply and auxiliary 5V sensor rail in programmable logic controller cabinets exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Provides brownout reset, manual reset via front-panel switch, and watchdog supervision to prevent firmware hang-induced safety faults. Use Value: 140ms reset timeout ensures full µP boot sequence completion; 0.62V PFI reference enables predictive power-fail warning for graceful I/O shutdown. |
Use Scenario: Supervises 3.0V domain powering CAN transceiver and MCU in body electronics module operating from vehicle battery (9V–16V). IC Role / Device Role / Timing Role: Generates reset during cold-crank brownout; uses PFI to monitor regulated 3.0V rail and trigger PFO interrupt before complete failure. Use Value: Guaranteed operation to -40°C/+125°C meets AEC-Q100 ambient requirements; open-drain outputs interface directly with 5V-tolerant CAN PHY reset pins. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures fail-safe restart of safety-critical ARM Cortex-M4 controller after AC power interruption or battery switchover. IC Role / Device Role / Timing Role: Delivers deterministic reset during power-up/down; watchdog prevents motor control lockup; MR enables clinician-initiated recalibration reset. Use Value: 1.6s watchdog timeout balances responsiveness and false-trigger avoidance; 3.08V threshold matches nominal 3.0V rail with ±3% stability over life. |
Use Scenario: Supervises 3.0V real-time clock and metrology ASIC in utility meter subjected to grid sags and conducted EMI. IC Role / Device Role / Timing Role: Detects pre-failure voltage droop via PFI divider; asserts PFO to save meter state before VCC collapse; RESET holds µP in safe state. Use Value: 0.62V reference enables accurate trip at 85% of nominal 3.0V rail (2.55V), providing 150ms advance warning before brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6705ASKA | Same 3.08V reset threshold, push-pull RESET output (vs. open-drain), identical PFI/PFO/WDO/WDI functionality. | Requires no external pullup on RESET; unsuitable where wired-OR reset bus or level translation is needed. | Select MAX6705ASKA when driving a single µP reset pin without shared bus constraints and lower output impedance is preferred. |
| TPS3808G30DBVR | 3.0V fixed reset threshold, 200ms timeout, push-pull RESET, no PFI/PFO, no WDO-only basic supervisor + watchdog. | Lacks power-fail warning capability and independent watchdog output; cannot replace PFO-driven interrupt functions. | Choose TPS3808G30DBVR only if power-fail monitoring is unnecessary and board space favors smaller SOT23-6 package. |
Compared with MAX6705ASKA, MAX6707ASKA's open-drain RESET enables flexible reset bus architecture; versus TPS3808G30DBVR, it adds critical PFI/PFO early-warning capability and independent WDO for NMI-based fault escalation-making it essential for safety-aware designs.
Availability
MAX6707ASKA is available at Aetrix Electronics and suitable for industrial controllers, automotive body electronics, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6707ASKA 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 applications, emphasizing reliability, integration, and performance in harsh environments.
The MAX6701–MAX6708 family was engineered specifically for multivoltage microprocessor supervision-delivering reset, watchdog, power-fail warning, and manual reset in ultra-small SOT23-8 packages for space-constrained embedded systems.
FAQ
What is the reset threshold voltage for MAX6707ASKA and how is it specified?
The MAX6707ASKA has a fixed reset threshold of 3.08V (typical) for the VCC supply, with ±3% tolerance over the full operating temperature range (-40°C to +125°C). This value is factory-trimmed and guaranteed-not dependent on external components. The 'S' suffix in MAX6707ASKA explicitly denotes the 3.08V threshold variant per Maxim's Threshold Suffix Guide, making it suitable for +3.0V system monitoring where tight trip-point accuracy is required.
Does MAX6707ASKA support operation down to 1V supply voltage, and what happens to RESET output below that?
Yes, MAX6707ASKA guarantees valid RESET output down to VCC = 1.0V-meaning RESET remains a logic-low signal (≤0.4V) and actively sinks current until VCC drops below 1.0V. Below 1.0V, RESET transitions to high-impedance (open-circuit) mode and no longer drives low. This behavior ensures deterministic µP shutdown during deep brownout while avoiding undefined logic states; a 100kΩ pull-down resistor on the RESET line is recommended for push-pull variants but not required for MAX6707ASKA's open-drain output.
How does the watchdog function in MAX6707ASKA differ from the standard MAX6707 version?
The MAX6707ASKA is the 'A-version', meaning its WDO output deasserts immediately when VCC, RST_IN1, or RST_IN2 rise above threshold-without waiting for a WDI edge. In contrast, the non-A MAX6707 requires a valid WDI transition to clear WDO after timeout. Both versions assert WDO on watchdog overflow or undervoltage, but the A-version adds faster recovery from transient faults. This distinction is critical for systems needing rapid watchdog recovery without software intervention-MAX6707ASKA delivers that behavior by design.
Can MAX6707ASKA monitor voltages other than VCC, and how is the PFI threshold set?
Yes, MAX6707ASKA can monitor secondary voltages via the PFI pin using an external resistive divider. The internal comparator references a precise 0.62V (typ) threshold, so the divider ratio is calculated as R1 = R2 × ((VEXT-TH/0.62) − 1), where VEXT-TH is the desired trip voltage. For example, to detect 12V failure at 10.2V, use R2 = 100kΩ and R1 ≈ 1.53MΩ. PFI leakage is only ±200nA, enabling high-value resistors that minimize quiescent current-ideal for battery-powered applications.
What package type and RoHS status does MAX6707ASKA use, and how is lead-free ordering indicated?
MAX6707ASKA uses an 8-pin SOT23-8 package (JEDEC MO-178 BA, 3.00mm × 1.75mm), with mechanical drawing code K8-2 per Maxim documentation. It is available in both leaded and lead-free versions: the standard MAX6707ASKA is leaded, while the lead-free variant is ordered as MAX6707ASKA+ (replacing '-T' with '+T'). The '+' suffix confirms RoHS compliance and Pb-free terminations, and the device meets JEDEC moisture sensitivity level MSL3-requiring bake prior to reflow if exposed to ambient >30°C/60% RH for >168 hours.
MAX6707ASKA 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:
- 2.93V, 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
MAX6707ASKA FAQ
1.How can I place an order for MAX6707ASKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707ASKA 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 MAX6707ASKA reliable?
The price and inventory of MAX6707ASKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707ASKA is usually 5 days.
3.What payment methods are accepted for MAX6707ASKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707ASKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707ASKA?
MAX6707ASKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707ASKA 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 MAX6707ASKA?
For technical support, including MAX6707ASKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707ASKA requirements.
6.How does Aetrix verify that MAX6707ASKA is sourced from the original manufacturer or authorized distributors?
All MAX6707ASKA 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 MAX6707ASKA meets industry standards.
7.What is the process for return or replacement of MAX6707ASKA?
All MAX6707ASKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707ASKA, 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 MAX6707ASKA part is unused and in its original packaging.
Return procedure for MAX6707ASKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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