DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
Signal Name:
8MCLK
Signal Description:
Signal Type:
8MHz Clock
Output
An 8.192MHz clock output that is referenced to the clock that is output at the RCLK pin.
Signal Name:
RPOSO
Signal Description:
Signal Type:
Receive Positive Data Input
Output
Updated on the rising edge of RCLKO with bipolar data out of the line interface. This pin is normally tied
to RPOSI.
Signal Name:
RNEGO
Signal Description:
Signal Type:
Receive Negative Data Input
Output
Updated on the rising edge of RCLKO with the bipolar data out of the line interface. This pin is normally
tied to RNEGI.
Signal Name:
RCLKO
Signal Description:
Signal Type:
Receive Clock Output
Output
Buffered recovered clock from the T1 line. This pin is normally tied to RCLKI.
Signal Name:
RPOSI
Signal Description:
Signal Type:
Receive Positive Data Input
Input
Sampled on the falling edge of RCLKI for data to be clocked through the receive-side framer. RPOSI and
RNEGI can be tied together for a NRZ interface. Can be internally connected to RPOSO by tying the
LIUC pin high.
Signal Name:
RNEGI
Signal Description:
Signal Type:
Receive Negative Data Input
Input
Sampled on the falling edge of RCLKI for data to be clocked through the receive-side framer. RPOSI and
RNEGI can be tied together for a NRZ interface. Can be internally connected to RNEGO by tying the
LIUC pin high.
Signal Name:
RCLKI
Signal Description:
Signal Type:
Receive Clock Input
Input
Clock used to clock data through the receive-side framer. This pin is normally tied to RCLKO. Can be
internally connected to RCLKO by tying the LIUC pin high.
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