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Analog Devices Inc./Maxim Integrated MAX6750KA16+
- Part No.:
- MAX6750KA16+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6750KA16+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,034
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Product details
Overview
MAX6750KA16+ from Analog Devices is a dual-voltage microprocessor supervisory IC with factory-trimmed VCC reset threshold (1.575V ±2%) and adjustable RESET IN threshold, capacitor-programmable reset timeout (5.7–9.5ms typical), watchdog timer with normal mode, and push-pull active-low RESET output in 8-pin SOT23 package - used for brownout protection and fault recovery in automotive engine control units.
For engineers reviewing the MAX6750KA16+ datasheet, MAX6750KA16+ pinout, MAX6750KA16+ application, or MAX6750KA16+ equivalent, this page delivers verified electrical parameters, automotive-grade thermal performance (-40°C to +125°C), dual-supply monitoring capability, reset transient immunity, and AEC-Q100 qualification status required for safety-critical embedded systems design.
Technical Context
The MAX6750KA16+ integrates two independent reset comparators: one monitors VCC against a fixed 1.575V threshold (±2% over -40°C to +125°C), while the second monitors an external voltage via RESET IN with 1.235V ±1.5% threshold. It supports dual-voltage supervision - asserting RESET if either VCC drops below 1.575V or RESET IN falls below 1.235V.
It features capacitor-adjustable reset timeout (tRP = 4.94×10⁶ × CSRT) and normal-mode watchdog timeout (tWD = 4.94×10⁶ × CSWT), both programmable from ~0.5ms to >9ms using 100pF–1500pF ceramic capacitors. No extended watchdog mode or windowed watchdog - only standard single-fall watchdog as confirmed for MAX6750 in Selector Guide.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 5.5V - supports low-voltage microcontrollers and legacy 5V systems without level-shifting |
| Quiescent Current | 3.7µA at VCC ≤ 2.0V - enables multi-year battery life in always-on monitoring applications |
| VCC Reset Threshold | 1.575V ±2% (–40°C to +125°C) - factory-trimmed for precise brownout detection at ultra-low supply rails |
| RESET IN Threshold | 1.235V ±1.5% - enables accurate external voltage monitoring (e.g., 3.3V or 2.5V rails) via resistor divider |
| Reset Timeout Period | 5.69–9.49ms (CSRT = 1500pF) - long enough to ensure full μP power stabilization, short enough to minimize system downtime |
| Watchdog Timeout Period | 5.69–9.49ms (CSWT = 1500pF) - matches typical firmware service intervals for real-time embedded code |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive environments per AEC-Q100 Grade 0 |
Pinout & Package
MAX6750KA16+ is housed in an 8-pin SOT23 package (Outline 21-0078, Land Pattern 90-0176), RoHS-compliant, with 1.9mm × 2.8mm footprint and 0.95mm height - optimized for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Adjustable reset comparator input | Accepts external voltage divider to monitor secondary rail (e.g., 3.3V I/O supply); asserts RESET if voltage falls below 1.235V |
| 2 - GND | Ground reference | Common return path for all internal comparators and output driver; must be low-impedance for noise immunity |
| 3 - VCC | Main supply input | Power source and primary monitored rail; device guarantees valid RESET down to VCC ≥ 1.0V |
| 4 - RESET | Active-low push-pull reset output | Drives μP reset pin directly; sinks 50µA @ 0.3V max VOL; no external pull-up required |
| 5 - SWT | Watchdog timeout capacitor input | Connects to ground via CSWT to set normal-mode watchdog period (tWD = 4.94×10⁶ × CSWT) |
| 6 - SRT | Reset timeout capacitor input | Connects to ground via CSRT to set reset assertion duration (tRP = 4.94×10⁶ × CSRT) |
| 7 - WDI | Watchdog input | Falling edge resets watchdog timer; must be strobed within tWD to prevent spurious reset; requires 100kΩ pulldown if unused |
| 8 - WDS | Watchdog select input | Grounded for normal mode (default); tied to VCC for 128× extended timeout - functional on MAX6750 per pin config table |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises VCC (1.575V) and external rail (via RESET IN at 1.235V) - eliminates need for two discrete supervisors in multi-rail systems |
| Capacitor-programmable timing | Separate SRT and SWT pins allow independent tuning of reset hold time and watchdog timeout using low-cost ceramic capacitors (100pF–1500pF) |
| Power-supply transient immunity | Rejects VCC glitches ≤50µs when falling 100mV below threshold - prevents false resets during load dump or switching noise |
| AEC-Q100 qualified | Qualified to Grade 0 (–40°C to +125°C ambient) with full automotive reliability testing - suitable for ECU, ADAS, and powertrain modules |
| Guaranteed RESET validity down to VCC = 1V | Ensures deterministic reset behavior during deep brownout conditions where many supervisors fail silently |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 1.5V core supply and 3.3V communication rail in diesel ECU during cold cranking and load dump events. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting RESET if either rail collapses, with 7ms timeout ensuring full MCU initialization before release. Use Value: Prevents corrupted flash writes and undefined state during unstable battery conditions - critical for ISO 26262 ASIL-B compliance. |
Use Scenario: Supervises FPGA configuration voltage and auxiliary 2.5V logic rail in modular PLC backplane with high EMI exposure. IC Role / Device Role / Timing Role: Provides independent reset assertion for each rail plus watchdog pulse generation tied to FPGA heartbeat signal. Use Value: Enables automatic recovery from firmware hang without operator intervention - reducing unplanned downtime in continuous-process automation. |
| Medical Infusion Pump Controller | Battery-Powered IoT Gateway |
Use Scenario: Ensures safe shutdown and restart sequence when Li-ion battery voltage drops below 3.0V while delivering motor drive pulses. IC Role / Device Role / Timing Role: Uses RESET IN to monitor battery voltage via divider and VCC to supervise 1.8V MCU supply; asserts RESET for 8ms upon undervoltage. Use Value: Guarantees pump halts cleanly before motor stall current damages tubing - meeting IEC 62304 Class C software safety requirements. |
Use Scenario: Maintains reliable operation during intermittent solar charging cycles where 3.3V rail sags below 3.0V for up to 200ms. IC Role / Device Role / Timing Role: Supervises both 3.3V system rail and 1.2V RF module supply; uses capacitor-tuned 6ms reset timeout to match BLE SoC boot sequence. Use Value: Eliminates boot-loop failures caused by marginal supply recovery - extending field deployment lifetime beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6751KA16+ | Includes manual-reset input (MR); same dual-monitoring, reset/watchdog thresholds, and timing architecture | Required where hardware-initiated reset (e.g., front-panel button) is mandatory per system safety architecture | Select MAX6751KA16+ only if MR functionality is needed; otherwise MAX6750KA16+ reduces BOM count and layout complexity |
| TPS3808G15DBVR | Single-rail supervision (1.5V threshold only); no adjustable RESET IN input; fixed 200ms watchdog; 1.5µA ICC | Suitable for simpler systems monitoring only VCC - lacks dual-rail capability and flexible timeout adjustment of MAX6750KA16+ | Choose TPS3808G15DBVR for cost-sensitive, single-supply designs where external rail monitoring is handled elsewhere |
Compared with MAX6751KA16+, MAX6750KA16+ removes MR pin to reduce pin count and simplify routing, while retaining identical dual-supply supervision and timing flexibility; versus TPS3808G15DBVR, it adds RESET IN monitoring and capacitor-adjustable timeouts at higher quiescent current - making it optimal for complex multi-rail automotive and industrial controllers.
Availability
MAX6750KA16+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, medical infusion pumps, and battery-powered IoT gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6750KA16+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision timing, power management, and sensor solutions.
The MAX6746–MAX6753 family was designed specifically for automotive and industrial microprocessor supervision - delivering AEC-Q100-qualified, low-power, dual-rail monitoring with field-proven transient immunity and flexible timing.
FAQ
What is the factory-trimmed VCC reset threshold voltage for MAX6750KA16+?
The MAX6750KA16+ has a factory-trimmed VCC reset threshold of 1.575V with ±2% tolerance over –40°C to +125°C, as defined by the "16" suffix in its part number per Table 2. This value is laser-trimmed during production and does not require external components to set - enabling precise low-voltage brownout detection without calibration.
Does MAX6750KA16+ support dual-voltage monitoring, and how is the second rail configured?
Yes, MAX6750KA16+ supports dual-voltage monitoring: VCC is supervised at 1.575V, and a second rail is monitored via the RESET IN pin with a fixed 1.235V threshold. To configure the second rail, connect an external resistor divider between that rail and GND, with the midpoint fed to RESET IN - allowing supervision of common voltages like 3.3V or 2.5V using VMON_TH = 1.235 × (R1 + R2)/R2.
Can the watchdog timer on MAX6750KA16+ operate in extended mode, and how is it enabled?
Yes, the MAX6750KA16+ watchdog supports extended mode (128× timeout multiplication) via the WDS pin. When WDS is tied to VCC, the basic watchdog timeout (set by CSWT on SWT) is multiplied by 128 - e.g., a 1500pF capacitor yields ~975ms instead of ~7.6ms. A state change on WDS clears the watchdog timer, and the feature is confirmed functional for MAX6750 in the Pin Configurations table.
What is the minimum VCC voltage at which MAX6750KA16+ guarantees valid RESET output logic?
The MAX6750KA16+ guarantees valid RESET output logic for VCC ≥ 1.0V, meaning the push-pull RESET pin will correctly assert low or deassert high even as supply voltage decays. Below 1.0V, output behavior is not guaranteed - but this margin exceeds most microcontrollers' operational minimums, ensuring robust reset signaling during brownout.
Is MAX6750KA16+ qualified for automotive applications, and what is its temperature rating?
Yes, MAX6750KA16+ is AEC-Q100 qualified (Grade 0) and fully specified over –40°C to +125°C ambient temperature. Its thermal resistance (qJA = 196°C/W on four-layer board) and production testing across this range confirm suitability for under-hood automotive applications including engine control, transmission control, and body electronics modules.
MAX6750KA16+ 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:
- 1.575V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6750KA16+ FAQ
1.How can I place an order for MAX6750KA16+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6750KA16+ 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 MAX6750KA16+ reliable?
The price and inventory of MAX6750KA16+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6750KA16+ is usually 5 days.
3.What payment methods are accepted for MAX6750KA16+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6750KA16+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6750KA16+?
MAX6750KA16+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6750KA16+ 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 MAX6750KA16+?
For technical support, including MAX6750KA16+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6750KA16+ requirements.
6.How does Aetrix verify that MAX6750KA16+ is sourced from the original manufacturer or authorized distributors?
All MAX6750KA16+ 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 MAX6750KA16+ meets industry standards.
7.What is the process for return or replacement of MAX6750KA16+?
All MAX6750KA16+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6750KA16+, 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 MAX6750KA16+ part is unused and in its original packaging.
Return procedure for MAX6750KA16+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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