TT Motor Encoder OUTPUT?

Using the TT Motor with Encoder 2.0, the 5 Vdc Encoder output voltage exceeds the ESP32-S3 nominal 3.3 Vdc.  I attempted to reduce the encoder output signal using a voltage divider consisting of a 1k and 2k Ohm divider.  However, the 3 kOhm load prevented proper operation.  As I don't have the actual circuit with its output drive “chip”/"device" I can't determine the cause of this failure.  Certainly, a few TTL unit loads (1ma) should be possible.  Is the actual circuit for the Encoder 2.0 available?