PEB2080 Datasheet, PDF (72/73 Pages) Siemens Semiconductor Group – S/T Bus Interface Circuit (SBC)

Electrical Characteristics
ECHO Characteristics
The timing of the ECHO output (pin X2, TE mode) is identical with that of output SDO: however, the
signal is “1” everywhere except in bit positions 24 and 25 (“D”-bit positions) of IOM frame, where it
is equal to the E bits received from the S interface.
Adaptive Receiver Characteristics
The integrated receiver uses an adaptively switched threshold detector. The detector controls the
switching of the receiver between two sensitivity levels. The hysteresis characteristics of the
receiver are shown in figure 45.
Figure 45
Switching of the Receiver between High Sensitivity and Low Sensitivity
Semiconductor Group
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