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Analog Devices Inc./Maxim Integrated MAX6752KA16+
- Part No.:
- MAX6752KA16+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6752KA16+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,797
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Product details
Overview
MAX6752KA16+ from Analog Devices is a window watchdog supervisory IC for microprocessor systems, featuring factory-trimmed 1.575V VCC reset threshold (±2%), capacitor-adjustable reset timeout (5.7–9.5ms), and dual-window watchdog with fast/slow fault detection (tWD1 = 11.4–152ms, tWD2 = 729–1214ms). It operates from 1.2V to 5.5V supply and delivers 3.7µA quiescent current, enabling reliable brownout and software fault monitoring in automotive ECUs.
For engineers reviewing the MAX6752KA16+ datasheet, MAX6752KA16+ pinout, MAX6752KA16+ application, or MAX6752KA16+ equivalent, this page provides verified circuit role (windowed µP supervisor), exact reset threshold (1.575V ±2%), watchdog timing architecture (SET0/SET1-configurable tWD1:tWD2 ratio), automotive temperature range (−40°C to +125°C), and SOT23-8 package mapping - all confirmed from Analog Devices' official MAX6746–MAX6753 datasheet Rev 23.
Technical Context
The MAX6752KA16+ implements a min/max (window) watchdog timer that asserts RESET when WDI falling edges occur either faster than tWD1 (fast fault) or slower than tWD2 (slow fault), with tWD1 selectable via SET0/SET1 pin strapping (8×, 16×, or 64× ratio relative to tWD2). Its reset function monitors only VCC (not RESET IN), using a factory-trimmed 1.575V threshold with 0.8% hysteresis.
Reset timeout (tRP) and slow watchdog period (tWD2) are set independently by external capacitors CSRT and CSWT respectively, using linear scaling formulas: tRP = 4.94×10⁶ × CSRT and tWD2 = 0.65×10⁹ × CSWT. The device uses push-pull RESET output and is AEC-Q100 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V ±2% (factory-trimmed); ensures precise brownout detection at low-voltage startup in 1.8V/2.5V systems. |
| Supply Voltage Range | 1.2V to 5.5V; supports operation across battery-backed, LDO-regulated, and multi-rail embedded systems. |
| Quiescent Current | 3.7µA at VCC ≤ 2.0V; enables >10-year battery life in always-on monitoring applications. |
| Reset Timeout | 5.69–9.49ms (CSRT = 1500pF); long enough to cover µP power-up sequencing, short enough to avoid system hang. |
| Slow Watchdog Period | 729–1214ms (CSWT = 1500pF); defines upper bound of valid WDI pulse interval for windowed fault detection. |
| Fast Watchdog Period | 11.4–152ms (SET0/SET1 configurable); defines lower bound - violation triggers immediate reset assertion. |
| Operating Temperature | −40°C to +125°C; fully specified for under-hood automotive and industrial control environments. |
Pinout & Package
MAX6752KA16+ is housed in an 8-pin SOT23 package (Outline 21-0078, Land Pattern 90-0176), optimized for space-constrained PCB layouts in automotive and portable electronics. Thermal resistance is 196°C/W (Junction-to-Ambient, 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET IN | Adjustable reset input | Not used in MAX6752KA16+ - device monitors VCC only; pin is NC (no connection) per MAX6752 pin configuration. |
| 2: SET0 | Watchdog window ratio select | Strapped low/high to configure tWD1:tWD2 ratio (8×, 16×, 64×) or disable watchdog (SET0=high, SET1=low). |
| 3: SWT | Slow watchdog timeout input | Capacitor-connected node setting tWD2 (slow fault window); formula: tWD2 = 0.65×10⁹ × CSWT. |
| 4: SRT | Reset timeout input | Capacitor-connected node setting tRP (reset assertion duration); formula: tRP = 4.94×10⁶ × CSRT. |
| 5: GND | Ground reference | Primary return path for internal comparators, ramp generators, and RESET output driver. |
| 6: SET1 | Watchdog window ratio select | Second control pin for tWD1 selection; used with SET0 to define 8×/16×/64× window ratio or disable watchdog. |
| 7: RESET | Push-pull reset output | Active-low output guaranteed valid down to VCC ≥ 1V; drives µP reset input directly without pullup. |
| 8: VCC | Supply voltage input | Power source and monitored rail; powers internal circuitry and feeds VCC reset comparator (1.575V threshold). |
Key Features
| Feature | Design Value |
|---|---|
| Window watchdog timer | Detects both fast (tWDI < tWD1) and slow (tWDI > tWD2) software faults - prevents runaway code and stuck loops. |
| Factory-trimmed VCC reset | 1.575V ±2% threshold eliminates external resistor divider, reducing BOM count and layout area in single-supply systems. |
| Capacitor-adjustable timing | Independent tuning of reset timeout (SRT) and slow watchdog period (SWT) enables precise alignment with µP boot time and firmware loop intervals. |
| AEC-Q100 qualification | Qualified for automotive applications including engine control, ADAS sensors, and body electronics requiring −40°C to +125°C operation. |
| Ultra-low supply current | 3.7µA at VCC ≤ 2.0V minimizes impact on battery-powered subsystems such as telematics wake-up monitors and CAN node supervisors. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 1.5V core supply and validates firmware execution timing in diesel ECU main controller. IC Role / Device Role / Timing Role: Window watchdog supervisor asserting RESET on missed WDI pulses or abnormally short intervals during CAN message processing. Use Value: Prevents undetected software lockup during transient EMI events, meeting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Supervises 2.5V FPGA configuration voltage and verifies real-time task scheduling in modular I/O backplane. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC monitor for brownout protection and windowed watchdog for deterministic task watchdogging. Use Value: Eliminates need for separate reset IC and external timing components, reducing footprint by 35% vs. discrete solution. |
| Medical Infusion Pump Controller | Smart Energy Meter MCU |
Use Scenario: Ensures fail-safe shutdown if ARM Cortex-M4 firmware fails to strobe WDI within defined window during motor control loop. IC Role / Device Role / Timing Role: Safety-critical window watchdog with tWD1 = 45.5ms and tWD2 = 729ms, configured via SET0/SET1 pins. Use Value: Meets IEC 62304 Class C software safety requirements by detecting both stuck and accelerated execution anomalies. |
Use Scenario: Supervises 3.3V metering SoC supply and validates firmware heartbeat in tamper-resistant smart meter design. IC Role / Device Role / Timing Role: Low-power (3.7µA) VCC supervisor with capacitor-tuned reset timeout matching SoC boot sequence. Use Value: Extends lithium-thionyl chloride battery life beyond 15 years while maintaining secure boot integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6753KA16+ | Identical VCC reset threshold (1.575V) and window watchdog architecture, but features open-drain RESET output instead of push-pull. | Suitable where level-shifting to higher-voltage logic (e.g., 5V µP reset input) is required; requires external pullup resistor. | Select MAX6753KA16+ only if system-level interface demands open-drain drive; otherwise MAX6752KA16+ simplifies layout with direct push-pull drive. |
| TPS3808G15DBVR | Fixed 1.5V reset threshold (±0.5%), no window watchdog - only standard timeout-based watchdog with adjustable delay. | Applicable for basic reset + simple watchdog needs; lacks dual-window fault detection capability of MAX6752KA16+. | Choose TPS3808G15DBVR for cost-sensitive, non-safety-critical applications where fast/slow fault discrimination is unnecessary. |
Compared with MAX6753KA16+, MAX6752KA16+ offers simpler reset interface (no pullup needed), while versus TPS3808G15DBVR it provides superior fault coverage via windowed watchdog - critical for ISO 26262 or IEC 62304 compliance where both stuck and runaway code must be detected.
Availability
MAX6752KA16+ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and smart energy meter designs requiring stable component supply with AEC-Q100 qualification and extended temperature support.
Supply support for MAX6752KA16+ 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.
The MAX6746–MAX6753 family was designed specifically for robust microprocessor supervision in harsh environments, emphasizing low power, precision reset thresholds, and advanced watchdog architectures for functional safety-critical systems.
FAQ
What is the exact reset threshold voltage of the MAX6752KA16+?
The MAX6752KA16+ has a factory-trimmed VCC reset threshold of 1.575V with ±2% tolerance over −40°C to +125°C, as specified in Table 2 (suffix "16") of the MAX6746–MAX6753 datasheet Rev 23. This value is fixed and does not require external resistor programming - the device does not use the RESET IN pin for monitoring.
Does the MAX6752KA16+ support dual-voltage monitoring?
No, the MAX6752KA16+ monitors only the VCC supply voltage using its internal 1.575V comparator. Unlike MAX6750/MAX6751 variants, it does not support adjustable RESET IN monitoring - the RESET IN pin is not connected internally and must be left unconnected or tied to GND per datasheet guidance.
How is the window watchdog timeout configured on the MAX6752KA16+?
The MAX6752KA16+ window watchdog uses two independent timing elements: slow watchdog period (tWD2) set by capacitor CSWT on SWT pin, and fast watchdog period (tWD1) selected via SET0/SET1 pin strapping (8×, 16×, or 64× ratio relative to tWD2). No WDS pin is used - that feature applies only to MAX6746–MAX6751.
What package type and footprint does the MAX6752KA16+ use?
The MAX6752KA16+ is supplied in an 8-pin SOT23 package (Outline Number 21-0078, Land Pattern 90-0176), with RoHS-compliant "+" suffix. Its compact 2.9mm × 1.6mm footprint and 1.1mm height enable high-density placement in automotive and portable electronics PCBs.
Is the MAX6752KA16+ qualified for automotive applications?
Yes, the MAX6752KA16+ is AEC-Q100 qualified and fully specified over the automotive temperature range (−40°C to +125°C). It meets stringent reliability, ESD, and transient immunity requirements for use in engine control, body electronics, and ADAS subsystems.
MAX6752KA16+ 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- 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
MAX6752KA16+ FAQ
1.How can I place an order for MAX6752KA16+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6752KA16+ 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 MAX6752KA16+ reliable?
The price and inventory of MAX6752KA16+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6752KA16+ is usually 5 days.
3.What payment methods are accepted for MAX6752KA16+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6752KA16+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6752KA16+?
MAX6752KA16+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6752KA16+ 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 MAX6752KA16+?
For technical support, including MAX6752KA16+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6752KA16+ requirements.
6.How does Aetrix verify that MAX6752KA16+ is sourced from the original manufacturer or authorized distributors?
All MAX6752KA16+ 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 MAX6752KA16+ meets industry standards.
7.What is the process for return or replacement of MAX6752KA16+?
All MAX6752KA16+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6752KA16+, 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 MAX6752KA16+ part is unused and in its original packaging.
Return procedure for MAX6752KA16+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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