This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].
The TCA9554A consists of one 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high or active low) registers. At power on, the I/Os are configured as inputs with a weak pullup to VCC. However, the system master can enable the I/Os as either inputs or outputs by writing to the 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
| TCA9554A | |
| Interrupt Output | Yes |
| fSCLK(Max)(MHz) | 401 |
| VCC(Min)(V) | 1.65 |
| VCC(Max)(V) | 5.5 |
| Pin/Package | 16TSSOP |
| Operating Temperature Range(°C) | -40 to 85 |
| Max Frequency(kHz) | 400 |
| I2C Address | 0111xxx |
| # of I/Os | 8 |
| Vcc range(V) | 1.65 - 5.5 |
| Low Power | Yes |
| Configuration Registers | Yes |
| 5V Tolerant I/O | Yes |
| 器件 | 状态 | 温度 | 价格 | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| TCA9554APWR | ACTIVE | -40 to 85 | 0.85 | 1ku | TSSOP (PW) | 16 | 2000 | LARGE T&R |
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| TCA9554APWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TCA9554APWR | TCA9554APWR |