The TCA9555DBR is a 16bit I2C and SMBus I/O expander with interrupt output and configuration registers in 24 pin SSOP package. This 16bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65V to 5.5V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface. The TCA9555 consists of two 8-bit configuration (input or output selection), input port, output port and polarity inversion (active high or active low operation) registers. At power on, I/Os are configured as inputs. The system master can enable I/Os as either inputs or outputs by writing to I/O configuration bits. The data for each input or output is kept in the corresponding input or output register. The polarity of the input port register can be inverted with the polarity inversion register.
● Low standby current consumption of 3.5µA maximum
● Open drain active low interrupt output
● 5V tolerant I/O ports
● 400KHz fast I2C bus
● Configurable slave address with 3 address pins
● Latched outputs with high current drive capability for directly driving LEDs
● Latch-up performance exceeds 100mA per JESD 78, class II
● ESD protection exceeds JESD 22 2KV human-body model (A114-A), 1KV charged-device model (C101)
● Operating temperature range from -40°C to +85°C
●ESD sensitive device, take proper precaution while handling the device.
