Overview
The ADM824SYRJZ-REEL7 is a supervisory circuit produced by Analog Devices Inc. This integrated circuit is designed to monitor and manage the power supply and system reset functions in microprocessor-based systems. It features a watchdog timer, manual reset input, and voltage monitoring capabilities, ensuring reliable operation and preventing system malfunctions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC | -0.3 | +6 | V | Absolute Maximum Rating | |
| Operating Temperature Range | -40 | +125 | °C | ||
| Storage Temperature Range | -65 | +150 | °C | ||
| Watchdog Timeout Period | 1.12 | 1.6 | 2.40 | sec | |
| WDI Pulse Width | 50 | ns | VIL = 0.4 V, VIH = 0.8 × VCC | ||
| WDI Input Threshold (VIL) | 0.3 × VCC | 0.7 × VCC | V | ||
| MR Input Threshold (VIL) | 0.3 × VCC | 0.7 × VCC | V | ||
| MR Input Pulse Width | 1 | µs | |||
| Package Type | 5-Lead SOT-23 |
Key Features
- Watchdog Timer: Monitors microprocessor activity with a watchdog timeout period of 1.12 to 2.40 seconds. The timer is cleared with every low-to-high or high-to-low logic transition on the watchdog input pin (WDI).
- Manual Reset Input: Allows for manual reset via an external push-button switch. The input has a glitch rejection of 100 ns and a pull-up resistance of 35 to 75 kΩ.
- Voltage Monitoring: Supervises the power supply voltage and asserts a reset if the voltage falls below the specified threshold.
- Noise Immunity: Integrated debounce circuitry and noise immunity features to ensure reliable operation.
- Operating Temperature Range: Functional from -40°C to +125°C, making it suitable for a wide range of applications.
Applications
The ADM824SYRJZ-REEL7 is suitable for various microprocessor-based systems that require reliable power supply monitoring and reset management. These include:
- Embedded systems
- Industrial control systems
- Automotive electronics
- Medical devices
- Consumer electronics
Q & A
- What is the primary function of the ADM824SYRJZ-REEL7? The primary function is to monitor and manage the power supply and system reset functions in microprocessor-based systems.
- What is the watchdog timeout period of the ADM824SYRJZ-REEL7? The watchdog timeout period ranges from 1.12 to 2.40 seconds.
- How does the manual reset input work? The manual reset input allows for manual reset via an external push-button switch and has integrated glitch rejection and pull-up resistance.
- What is the operating temperature range of the ADM824SYRJZ-REEL7? The operating temperature range is from -40°C to +125°C.
- What type of package does the ADM824SYRJZ-REEL7 come in? It comes in a 5-Lead SOT-23 package.
- Is the ADM824SYRJZ-REEL7 RoHS compliant? Yes, the ADM824SYRJZ-REEL7 is RoHS compliant.
- What is the purpose of the WDI input? The WDI (Watchdog Input) monitors microprocessor activity and clears the watchdog timer with every low-to-high or high-to-low logic transition.
- How does the noise immunity feature work? The noise immunity feature includes integrated debounce circuitry and the option to add a 0.1 µF capacitor between the MR input and ground for additional noise immunity.
- What are some common applications of the ADM824SYRJZ-REEL7? Common applications include embedded systems, industrial control systems, automotive electronics, medical devices, and consumer electronics.
- What is the maximum output current for the reset pins? The maximum output current for the reset pins is 20 mA.
