S3031B
E4/STM-1/OC-3 ATM TRANSCEIVER
Table 3. Transmitter Output Pin Assignment and Description
Pin Name
Level
I/O
Pin #
Description
TSDATOP
TSDATON
Diff.
PECL
O
12
13
Transmit Serial Data Out. In NRZ mode, this signal is the delayed
version of the incoming data stream (TSDATIP/N) updated on the
falling edge of Serial Clock Out (TSCLKOP). In CMI mode, this
signal is the CMI-encoded version of TSDATIP/N.
TSCLKOP
TSCLKON
Diff.
PECL
O
9
10
Transmit Serial Clock Out. This signal is a 155.52 MHz clock that
is phase–aligned with Transmit Serial Data Out in NRZ mode. In
CMI mode, TSCLKOP/N cannot be used.
TREFCLKOUT
XFRMDRVA
TTL
O
O
95
89
Transmit Reference Clock Out. Single-ended TTL reference clock
output.
Analog
Transformer Driver A. Used to drive the transformer of the
electrical interface. For E4 operation this output should be
connected per Figure 19 to provide the correct G.703 compatible
output levels from the transformer when connected to the
specified 75Ω cable.
XFRMDRVB
XFRMSTATA
XFRMSTATB
Analog
TTL
O
O
O
88
93
91
Transformer Driver B. Used to drive the monitor transformer of the
electrical interface. This output should be connected per Figure
19 to provide the correct output levels from the transformer when
connected to the specified 75Ω cable.
Transformer Drive A Status. When High, the XFRMDRVA output
is enabled, CMI mode is correctly selected, and the PLL is locked
to switching data at the TSDATIP/N or PIN[3:0] input. Logic Low
indicates deselection or code error.
TTL
Transformer Drive B Status. When High, the XFRMDRVB output
is enabled, CMI mode is correctly selected, and the PLL is locked
to switching data at the TSDATIP/N or PIN[3:0] input. Logic Low
indicates deselection or code error.
10
August 19, 1999 / Revision D
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
