SCPU046 September 2021 TCA9536 , TCA9537
3 Adjustable pull-up resistors
TCA9536EVM comes with adjustable pull-up resistors which allows for the user to select from a 4.7 kΩ down to a ~515 Ω resistor. The pull-up resistor selectors (J4 and J8)are shown in Figure 3-1.
Table 3-1 Effective pull-up resistor values table
| Pull-up resistor (Ω) | Equivalent pull-up resistance (Ω) |
|---|---|
| 4.7 k || 2 k | 1.4 k |
| 4.7 k || 820 | ~699 |
| 2k || 820 | ~580 |
| 4.7 k || 2k || 820 | ~515 |
Figure 3-1 Adjustable pull-up resistors