ZHCSP87A December 2022 – September 2023 TPS25772-Q1
PRODUCTION DATA
Typical value for RP, the I2C pullup resistor is given by:
RP = tr / (0.8473 × Cb)
Refer to Table 9-10 for values of tr, Cb and VOL.
| Parameter | Standard Mode (Max) | Fast Mode (Max) | Fast Mode Plus (Max) | Unit | |
|---|---|---|---|---|---|
| fSCL | SCL clock frequency | 100 | 400 | 1000 | kHz |
| tr | Rise time of both SDA and SCL signals | 1000 | 300 | 120 | ns |
| Cb | Capacitive load for each bus line | 400 | 400 | 550 | pF |
| VOL | Low-level output voltage (at 3-mA current sink, VDD > 2 V) | 0.4 | 0.4 | 0.4 | V |
| Low-level output voltage (at 2-mA current sink, VDD ≤ 2 V) | – | 0.2 × VDD | 0.2 × VDD | V | |
For additional background regarding I2C pullup resistor calculations, please refer to application report, I2C Bus Pullup Resistor Calculation.