PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Pin
Pin No.
Name
Type
PQFP PLCC Function
RLCV/
I/O
43
45
Receive Line Code Violation Indication
(RLCV). When the T1XC is configured to
receive single-rail data, this input may be
enabled to be sampled on the rising or
falling edge of RCLKI.
SDN
Sliced Negative Line Pulse (SDN). This
pin becomes an output when the receive
analog line interface is powered up. A
positive pulse on the SDN output
corresponds to the sampled negative
pulse excursion on the RAS input.
RCLKI
Input
48
50
Receive Line Clock Input (RCLKI). This
input is an externally recovered 1.544
MHz line clock that may be enabled to
sample the RDP and RDN inputs on its
rising or falling edge when the input
format is enabled for dual-rail NRZ; or to
sample the RDD and RLCV inputs on its
rising or falling edge when the input
format is enabled for single-rail.
RAS
REF
Input
I/O
53
51
55
53
Receive Analog Signal (RAS). This
analog input samples the AC signal on
an external isolation transformer. It is
connected to the positive lead of the
transformer secondary through a passive
attenuation network.
Receive Reference (REF). This analog
bidirectional pin provides DC bias to an
external isolation transformer. It is
connected to the negative lead of the
transformer secondary and to a
decoupling capacitor to RAVS.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
16
PMC [ PMC-SIERRA, INC ]
