MAX813 timer circuit
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The MAX813 is a microprocessor supervisory circuit designed to monitor power supplies and provide reliable system reset functionality. It integrates multiple functions, including a precision voltage reference, a reset timer, and a watchdog timer, into a single package. The MAX813 ensures that microprocessor systems start up correctly and operate reliably by generating reset signals during power-up, power-down, and brownout conditions, as well as providing a watchdog timer to guard against system lockup.
Key Features:
- Precision supply voltage monitoring
- Manual reset input
- Watchdog timer to prevent system lockup
- Reset output for power-up, power-down, and brownout conditions
- Low power consumption
- Compact 8-pin DIP/SOIC package
- Active-low and active-high reset outputs
- Supply Voltage (VCC): 4.5V to 5.5V
- Reset Threshold Voltage: 4.65V (typical)
- Reset Timeout Period: 200ms (typical)
- Watchdog Timeout Period: 1.6s (typical)
- Reset Active Timeout: 140ms (typical)
- Operating Temperature Range: -40°C to +85°C
- Package: 8-pin DIP/SOIC
- Microprocessor Systems: Ensures proper reset and watchdog functionality in microprocessor-based systems.
- Embedded Systems: Provides system monitoring and control in embedded applications.
- Industrial Control: Used in industrial control systems to ensure reliable operation.
- Telecommunications: Ensures stability and reliability in communication equipment.
- Consumer Electronics: Integrated into various consumer electronic devices for enhanced reliability.
- Automotive Systems: Suitable for automotive applications requiring robust system monitoring.
Technical Specifications:
- Logic Family: CMOS
- Number of Channels: 3
- Switch Configuration: Single-Pole Double-Throw (SPDT)
- Supply Voltage Range: 3V to 15V
- “ON” Resistance (R_ON): 125Ω typical at V_DD = 10V
- “OFF” Leakage Current (I_OFF): ±100pA typical at V_DD = 10V
- Control Input Voltage (V_IH): 0.7 V_DD min, 0.3 V_DD max
- Maximum Operating Frequency: 40 MHz at V_DD = 10V
Applications:
- Signal routing and switching
- Analog and digital multiplexing
- Audio and video signal processing
- Data acquisition systems
- Test equipment