ZHCSF18E May 2016 – May 2019 TUSB1002
PRODUCTION DATA.
The TUSB1002 has (MODE, CFG1, CFG2, CH1_EQ1, CH1_EQ2, CH2_EQ1, and CH2_EQ2) 4-level inputs pins that are used to control the equalization gain and the output voltage swing dynamic range. These 4-level inputs use a resistor divider to help set the 4 valid levels and provide a wider range of control settings. There is an internal 45 kΩ pull-up and a 95 kΩ pull-down. These resistors, together with the external resistor connection combine to achieve the desired voltage level.
| LEVEL | SETTINGS |
|---|---|
| 0 | Option 1: Tie 1 KΩ 5% to GND.
Option 2: Tie directly to GND. |
| R | Tie 20 KΩ 5% to GND. |
| F | Float (leave pin open) |
| 1 | Option 1: Tie 1 KΩ 5% to VCC.
Option 2: Tie directly to VCC. |
NOTE
In order to conserve power, the TUSB1002 disables 4-level input’s internal pull-up/pull-down resistors after the state of 4-level pins have been sampled on rising edge of EN. A change of state for any four level input pin is not applied to TUSB1002 until after EN pin transitions from low to high.