8-bit Fm+ I2C-bus LED driver - # of Addresses: 126 ; Enable: yes ; I2C-bus: 1000 kHz; I2C-bus interface: Fast Mode Plus 30 mA SDA outputs for 4000 pF bus ; Max Sink Current per bit: 25 mA; Max Sink Current, per package: 200 mA; Number of bits: 8 ; Operating temperature: -40~85 Cel; Operating voltage: 2.3~5.5 VDC; PWMs: 9 (8 x 97 kHz dim and 1 x 97 kHz dim or 24 Hz to 10.73 sec blink); Package: SOT360-1 (TSSOP20); Container: Tube
The PCA9634PW,112 can source up to 25mA and sink up to 50mA per output, making it suitable for driving LEDs, relays, and other loads.
To ensure a proper reset, the RESET pin should be pulled high for at least 1ms after power-up. This can be done using an external pull-up resistor and capacitor.
Yes, the PCA9634PW,112 can drive inductive loads like relays, but it's essential to add a flyback diode to protect the device from back-EMF. Additionally, the relay's coil voltage and current should be within the device's output specifications.
The output mode can be configured using the OPMODE register (register 0x01). Setting the OPMODE bit to 0 enables open-drain mode, while setting it to 1 enables push-pull mode.
The recommended clock frequency for the I2C interface is up to 400 kHz. However, the device can operate at higher frequencies, but with reduced noise immunity and increased power consumption.
PCA9634PW,112 datasheet
by NXP Semiconductors
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