I/O OPERATIONS (see also Figure 4) Each of the PCA9501's eight l/Os can be independently used as an input or output. Output data is transmitted to the port by the l/0 WRITE mode (see Figure 6). Input l/0 data is transferred from the port to the microcontroller by the READ mode (See Figure 7).
| SYMBOL | PARAMETER | CONDITIONS | TYP | MAX | UNIT |
| VCBO | collector-base voltage | open emitter | | 100 | V |
| lc | collector current (DC) | | | 100 | mA |
| Ptot | total power dissipation | up to Ts = 60 IC | | 1.15 | W |
| fT | transition frequency | lc = 25 mA; VCE = 10 V | 1 | | GHz |
| Cre | feedback capacitance | lc = 0; VCB = 10V | 1.7 | | pF |
| Tj | junction temperature | | | 150 | |
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