CH452L LED driver
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Description:
The CH452L is a versatile digital integrated circuit designed to drive multiple LEDs and control a keypad matrix. It simplifies LED control by offering a serial interface and built-in decoding logic, reducing the number of pins required compared to parallel interfaces. Additionally, the CH452L can be connected to a keypad matrix with up to four rows and four columns, providing combined LED display and button control functionality in a single chip.
Key Features:
- Drives up to common-anode LEDs (typical range 4-8) for numeric or alphanumeric displays
- Serial interface (typically SPI compatible) for efficient data transfer
- Built-in scanning circuitry eliminates the need for external decoders
- Optional keypad matrix interface (up to 4x4) for integrated button control
- Wide operating voltage range (typically 5V to 15V)
- Low power consumption
Technical Specifications:
- Package Type: SOP-24
- Input Voltage: 5V to 15V (typical)
- Output Current: typically range from 10mA to 20mA
- Serial Interface: SPI compatible (verify datasheet for exact protocol)
- Operating Temperature Range: 0°C to +70°C (commercial grade)
Applications:
- LED displays for clocks, timers, meters, and other electronic devices
- Simple control panels with LED readouts
- Educational and hobbyist projects with LED displays and button controls
Datasheet:
For detailed technical specifications, programming information, and application notes, refer to the CH452L Datasheet
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