TCA9534 8-bit I2C-bus and SMBus I/O expander
Low-voltage 8-bit I2C/SMBus I/O expander with interrupt output, 3 address pins and push-pull P-port I/O, 16-pin TSSOP package.
Aliase:TCA9534PWR, TCA9534PW, TCA9534DWR, TCA9534DW
TSSOP-16 Top View
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | A0 | Digital | Address input. Connect to VCC or ground |
| 2 | A1 | Digital | Address input. Connect to VCC or ground |
| 3 | A2 | Digital | Address input. Connect to VCC or ground |
| 4 | P0 | Digital | P-port input-output, input at power on |
| 5 | P1 | Digital | P-port input-output, input at power on |
| 6 | P2 | Digital | P-port input-output, input at power on |
| 7 | P3 | Digital | P-port input-output, input at power on |
| 8 | GND | Ground | Ground |
| 9 | P4 | Digital | P-port input-output, input at power on |
| 10 | P5 | Digital | P-port input-output, input at power on |
| 11 | P6 | Digital | P-port input-output, input at power on |
| 12 | P7 | Digital | P-port input-output, input at power on |
| 13 | ~INT | Digital | Interrupt output, connect to VCC through pullup |
| 14 | SCL | Digital | Serial clock bus, pullup to VCC |
| 15 | SDA | Digital | Serial data bus, pullup to VCC |
| 16 | VCC | Power | Supply voltage |