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Analog Devices Inc./Maxim Integrated MAX6753KA16+T
- Part No.:
- MAX6753KA16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6753KA16+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,028
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Product details
Overview
MAX6753KA16+T 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 typical), 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 is AEC-Q100 qualified for automotive use in engine control units and ADAS power management.
For engineers reviewing the MAX6753KA16+T datasheet, MAX6753KA16+T pinout, MAX6753KA16+T application, or MAX6753KA16+T equivalent, this page delivers verified electrical parameters, SOT23-8 pin mapping, automotive-grade thermal performance (-40°C to +125°C), and real-world substitution guidance - all grounded in Analog Devices' official MAX6746–MAX6753 family documentation.
Technical Context
The MAX6753KA16+T implements a min/max (windowed) watchdog architecture that asserts RESET when WDI falling edges occur either faster than tWD1 (fast fault) or slower than tWD2 (slow fault), enabling robust detection of runaway or stalled firmware execution. Its reset comparator monitors VCC only (no RESET IN input), with factory-set 1.575V threshold and guaranteed operation down to VCC ≥ 1.0V.
Reset and watchdog timeouts are independently set via external capacitors on SRT and SWT pins, using linear scaling formulas: tRP = 4.94×10⁶ × CSRT and tWD2 = 0.65×10⁹ × CSWT. Pin-strapped SET0/SET1 select tWD1 ratios (8×, 16×, or 64× tWD2), while WDS is unused - confirming MAX6753-specific configuration distinct from MAX6746–MAX6751 extended-mode variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 5.5V - supports low-voltage microcontrollers and wide-input industrial rails |
| VCC Reset Threshold | 1.575V ±2% - factory-trimmed for precise brownout detection at 1.6V nominal system rail |
| Supply Current | 3.7µA typical at VCC ≤ 2.0V - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout Period | 5.69–9.49ms (CSRT = 1500pF) - configurable via capacitor to match µP power-up timing requirements |
| Slow Watchdog Period (tWD2) | 729–1214ms (CSWT = 1500pF) - defines upper bound of valid WDI pulse interval for windowed supervision |
| Fast Watchdog Period (tWD1) | 11.38–151.8ms (CSWT = 1500pF, SET ratio = 64–8) - defines lower bound of valid WDI pulse interval |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments per AEC-Q100 Grade 0 |
Pinout & Package
MAX6753KA16+T is housed in an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176), optimized for space-constrained automotive PCBs with thermal resistance qJA = 196°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Not connected / NC | Pin is unconnected in MAX6753 - device monitors VCC only; no external voltage divider support |
| 2 - WDS | Watchdog Select Input | No function - unused in MAX6753; must be left floating or tied to GND/VCC per layout best practice |
| 3 - SET0 | Window Ratio Control | Logic input selecting tWD1/tWD2 ratio: low = 8×, high = disable watchdog (with SET1 low) |
| 4 - SWT | Slow Watchdog Timing Input | Capacitor connection point setting tWD2 (slow fault window); formula tWD2 = 0.65×10⁹ × CSWT |
| 5 - GND | Ground Reference | Analog/digital ground return; requires low-impedance connection to minimize noise-induced false resets |
| 6 - SET1 | Window Ratio Control | Logic input selecting tWD1/tWD2 ratio: low = 16×, high = 64× (with SET0 high); both high disables watchdog |
| 7 - RESET | Active-Low Reset Output | Push-pull output driving µP reset pin directly; valid logic state guaranteed for VCC ≥ 1.0V |
| 8 - VCC | Power Supply Input | Main supply input and monitored voltage source; absolute max rating -0.3V to +6.0V |
Key Features
| Feature | Design Value |
|---|---|
| Windowed Watchdog Timer | Detects both fast faults (WDI pulses too frequent) and slow faults (WDI pulses too infrequent), preventing silent firmware hangs |
| Factory-Trimmed 1.575V Threshold | Eliminates external resistor network for VCC monitoring, reducing BOM count and layout area in 1.6V/1.8V systems |
| Capacitor-Adjustable Timeouts | Independent SRT and SWT pins allow precise tuning of reset delay and watchdog windows without firmware changes |
| AEC-Q100 Qualified | Validated for automotive applications including powertrain, body electronics, and ADAS with full temperature range coverage |
| 3.7µA Supply Current | Enables continuous supervision in energy-sensitive applications such as telematics modules and battery-backed ECUs |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Real-time monitoring of 1.6V core supply and safety-critical firmware execution in gasoline/diesel ECU mainboards. IC Role / Device Role / Timing Role: Window watchdog supervisor asserting hardware reset upon missed WDI strobes or excessive loop delays during CAN message processing. Use Value: Prevents undetected processor lockup during transient voltage sags or electromagnetic interference events in under-hood environments. |
Use Scenario: Supervision of vision processor power rails and firmware health in lane-departure warning camera modules. IC Role / Device Role / Timing Role: Dual-threshold watchdog enforcing strict timing windows on image sensor data acquisition interrupts. Use Value: Guarantees fail-safe shutdown before corrupted frame buffers propagate to steering actuation logic. |
| Automotive Infotainment Head Unit | Electric Vehicle Battery Management System (BMS) |
Use Scenario: Power-on reset coordination and runtime watchdog for ARM-based multimedia SoC with dual 1.2V/1.8V supplies. IC Role / Device Role / Timing Role: VCC-only reset generator with programmable timeout matching SoC boot ROM initialization sequence. Use Value: Eliminates need for discrete RC reset networks while maintaining AEC-Q100 compliance for dashboard display subsystems. |
Use Scenario: Monitoring of isolated microcontroller supply in high-side cell monitoring IC clusters operating at 1.5V nominal. IC Role / Device Role / Timing Role: Low-current (3.7µA) supervisor ensuring reliable reset assertion during deep-sleep wake-up transitions. Use Value: Extends battery standby time by >15% versus higher-quiescent alternatives without compromising fault coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6752KA32+T | Identical window watchdog architecture but factory-trimmed to 3.200V VCC threshold (±2%) | Suitable for 3.3V systems requiring tighter reset margin; not drop-in for 1.6V rails | Select MAX6752KA32+T only when supervising 3.3V VCC with same timing requirements |
| TLV809E25DBVR | Single-threshold reset IC (2.5V) with fixed 200ms timeout; no watchdog or windowing capability | Limited to basic power-on reset in non-safety-critical consumer applications | Choose TLV809E25DBVR only for cost-sensitive designs where firmware supervision is handled externally |
Compared with MAX6753KA16+T, MAX6752KA32+T offers identical window watchdog functionality but targets 3.3V rails instead of 1.6V, while TLV809E25DBVR provides only basic reset without supervision - making MAX6753KA16+T uniquely suited for AEC-Q100-compliant 1.6V automotive microcontroller monitoring.
Availability
MAX6753KA16+T is available at Aetrix Electronics and suitable for automotive engine control, ADAS sensor modules, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6753KA16+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
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 and power management solutions.
The MAX6746–MAX6753 family was designed specifically for automotive-grade microprocessor supervision, delivering AEC-Q100-qualified window watchdogs, ultra-low quiescent current, and factory-trimmed reset thresholds to simplify safety-critical system design.
FAQ
What is the factory-set reset threshold voltage for MAX6753KA16+T?
The MAX6753KA16+T has a factory-trimmed VCC reset threshold of 1.575V ±2% over -40°C to +125°C, corresponding to suffix "16" in the ordering code. This value is laser-trimmed during production and does not require external resistor networks, making it ideal for 1.6V/1.8V microcontroller supply monitoring in automotive applications where precision brownout detection is critical.
Does MAX6753KA16+T support dual-voltage monitoring like some other devices in the MAX6746–MAX6753 family?
No, MAX6753KA16+T monitors VCC only and does not support external RESET IN voltage monitoring. Unlike MAX6748–MAX6751 variants, its Pin 1 (RESET IN) is unconnected. The device relies solely on its factory-trimmed 1.575V VCC threshold, confirmed in the Selector Guide and Pin Configurations section of the official datasheet.
How do I configure the window watchdog timeout periods for MAX6753KA16+T?
Configure MAX6753KA16+T's window watchdog by connecting capacitor CSWT to Pin 4 (SWT) to set tWD2 (slow fault period), then strapping Pins 3 (SET0) and 6 (SET1) to select tWD1/tWD2 ratio (8×, 16×, or 64×). For example, with CSWT = 1500pF and SET0/SET1 both low, tWD2 ≈ 975ms and tWD1 ≈ 122ms - values derived from tWD2 = 0.65×10⁹ × CSWT and documented ratio tables.
Is MAX6753KA16+T pin-compatible with MAX6746–MAX6751 devices in the same SOT23-8 package?
No, MAX6753KA16+T is not pin-compatible with MAX6746–MAX6751. While both use SOT23-8, Pin 1 is RESET IN (functional) in MAX6746–MAX6751 but NC in MAX6753, and Pin 2 is WDS (functional) in MAX6746–MAX6751 but unused in MAX6753. The MAX6752/MAX6753 share identical pinout, but differ from earlier family members - confirmed in the Pin Configurations table.
What is the minimum supply voltage required for MAX6753KA16+T to guarantee valid RESET output logic?
MAX6753KA16+T guarantees valid RESET output logic for VCC ≥ 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below 1.0V, RESET behavior is not guaranteed - though the device remains functional down to VCC = 1.2V per operating range. This ensures reliable reset assertion during brownout conditions common in automotive 12V battery systems with DC-DC regulation.
MAX6753KA16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.575V
- Output:
- Open Drain or Open Collector
- 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
MAX6753KA16+T FAQ
1.How can I place an order for MAX6753KA16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6753KA16+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 MAX6753KA16+T reliable?
The price and inventory of MAX6753KA16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6753KA16+T is usually 5 days.
3.What payment methods are accepted for MAX6753KA16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6753KA16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6753KA16+T?
MAX6753KA16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6753KA16+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 MAX6753KA16+T?
For technical support, including MAX6753KA16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6753KA16+T requirements.
6.How does Aetrix verify that MAX6753KA16+T is sourced from the original manufacturer or authorized distributors?
All MAX6753KA16+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 MAX6753KA16+T meets industry standards.
7.What is the process for return or replacement of MAX6753KA16+T?
All MAX6753KA16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6753KA16+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 MAX6753KA16+T part is unused and in its original packaging.
Return procedure for MAX6753KA16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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