PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
8
PIN DESCRIPTION
Pin Name
Type
Pin
No.
Function
TXTIP[4]
TXTIP[3]
TXTIP[2]
TXTIP[1]
Output 54
49
Transmit Bipolar Tip (TXTIP[4:1]). The TXTIP[4:1]
outputs are the transmit analog positive pulses.
These analog outputs drive an AC signal through
an external matching transformer. They must be
connected to the positive lead of the transformer
primary.
113
118
An analog Transmit Monitor Positive point is
internally bonded to each of these outputs and is
used to monitor the positive pulses on each
transmit line.
TXRING[4] Output 57
Transmit Bipolar Ring (TXRING[4:1]). The
TXRING[4:1] outputs are the transmit analog
negative pulses. These analog outputs drive an
AC signal through an external matching
transformer. They must be connected to the
negative lead of the transformer primary.
TXRING[3]
TXRING[2]
TXRING[1]
46
110
121
An analog Transmit Monitor Negative point is
internally bonded to each of these outputs and is
used to monitor the negative pulses on each
transmit line.
TC[4]
TC[3]
TC[2]
TC[1]
I/O
59
Transmit Reference Decoupling Capacitor
(TC[4:1]). These analog bidirectionals provide
decoupling for an internal reference generator.
They must be connected to an external
decoupling capacitor to the corresponding
TAVD[4:1].
44
108
123
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
19
PMC [ PMC-SIERRA, INC ]
