Overview
The ADM823TYKSZ-R7 is a supervisory circuit produced by Analog Devices Inc., designed to monitor power supply voltage levels and code execution integrity in microprocessor-based systems. This component is part of the ADM823/ADM824/ADM825 family, which provides essential functions such as power-on reset signals and an on-chip watchdog timer. The watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period, ensuring system reliability and stability. Additionally, the device includes a manual reset input that allows for external reset initiation through a push-button switch.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature Range | −40°C | +125°C | |||
| Supply Voltage (VCC) | −0.3 V | +6 V | |||
| Watchdog Timeout Period | 1.12 sec | 1.6 sec | 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 | ||
| WDI Input Current | −20 µA | 120 µA | 160 µA | µA | VWDI = VCC, time average; VWDI = 0 V, time average |
| Manual Reset Input Pulse Width | 1 µs | ||||
| Manual Reset Input Glitch Rejection | 100 ns | ||||
| Package Type | 5-Lead SC70 (KS-5) | ||||
| Thermal Impedance (θJA) | 146°C/W | °C/W | SC70 package |
Key Features
- Power-On Reset Signals: Provides guaranteed reset output valid down to VCC = 1 V.
- Watchdog Timer: Monitors microprocessor activity and resets the system if the watchdog input is not toggled within the preset timeout period.
- Manual Reset Input: Allows for external reset initiation through a push-button switch with integrated debounce circuitry.
- Low Power Consumption: Typically 5 µA.
- Power Supply Glitch Immunity: Ensures robust operation against power supply glitches.
- Compact Packaging: Available in 5-lead SC70 and SOT-23 packages.
Applications
- Microprocessor Systems: Ensures reliable operation in various microprocessor-based systems.
- Computers and Controllers: Suitable for use in computer systems, industrial controllers, and other control systems.
- Intelligent Instruments: Used in intelligent instruments that require robust power monitoring and reset capabilities.
- Portable Equipment: Ideal for portable devices due to its low power consumption and compact packaging.
Q & A
- What is the primary function of the ADM823TYKSZ-R7?
The primary function is to monitor power supply voltage levels and code execution integrity in microprocessor-based systems. - What types of packages are available for the ADM823TYKSZ-R7?
The component is available in 5-lead SC70 and SOT-23 packages. - What is the watchdog timeout period for the ADM823TYKSZ-R7?
The watchdog timeout period ranges from 1.12 seconds to 2.40 seconds. - How does the manual reset input work?
The manual reset input allows for external reset initiation through a push-button switch with integrated debounce circuitry. - What is the typical power consumption of the ADM823TYKSZ-R7?
The typical power consumption is 5 µA. - What is the operating temperature range of the ADM823TYKSZ-R7?
The operating temperature range is from −40°C to +125°C. - What is the thermal impedance of the SC70 package?
The thermal impedance (θJA) for the SC70 package is 146°C/W. - Is the ADM823TYKSZ-R7 RoHS compliant?
Yes, the ADM823TYKSZ-R7 is RoHS compliant. - What is the purpose of the WDI input?
The WDI (Watchdog Input) monitors microprocessor activity and resets the system if the input is not toggled within the preset timeout period. - How does the component provide power supply glitch immunity?
The component is designed to operate robustly against power supply glitches, ensuring reliable system operation.
