PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Pin
Pin No.
Name
Type
PQFP PLCC Function
TDD
Output 71
2
Transmit Digital DS-1 Signal (TDD). This
signal is available on the output when
configured to transmit single-rail data.
The TDD signal may be enabled to be
updated on the rising or falling edge of
TCLKO.
TDN/
Output 68
67
Transmit Digital Negative Line Pulse
(TDN). This signal is available on the
output when the T1XC is configured to
transmit dual-rail data. The TDN signal
can be formatted for either RZ or NRZ
waveforms, and can be enabled to be
updated on the rising or falling edge of
TCLKO.
TFLG
Transmit FIFO Flag (TFLG). This signal
is available when configured to transmit
single-rail data. The TFLG output
indicates when the transmit rate
conversion FIFO in DJAT is nearing an
empty or a full condition. Either
indication may be selected. This output
may be enabled to be updated on the
rising or falling edge of TCLKO.
TAP
Output 56
58
Transmit Analog Positive Pulse (TAP).
This analog output drives an AC signal
through an external matching
transformer. It is connected to the
positive lead of the transformer primary.
An analog Transmit Monitor Positive point
is internally bonded to this output and is
used to monitor the positive pulses on
the transmit line.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
28
PMC [ PMC-SIERRA, INC ]
