xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 81

• Manufacturer Part Number: xrt94l33
• Description: Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
• Manufacturer: Exar Corporation

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3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
AF10
STS1RXD_C1J1_2
TXDS3LINECLK_2
O
CMOS
STS-1 Receive Telecom Bus - C1/J1 Byte Phase Indicator
Output Signal – Channel 2:
The exact function of this output pin depends upon whether
the STS-1 Telecom Bus Interface for Channel 2 has been
enabled or not.
If STS-1 Telecom Bus (Channel 2) has been enabled –
STS-1 Receive Telecom Bus – C1/J1 Byte Phase Indicator
Output Signal:
This output pin pulses “high” under the following two
conditions.
Whenever
“STS1RXD_D_2[7:0]” output, and
Whenever
“STS1RXD_D_2[7:0]” output.
Notes:
1.
2.
TXDS3LINECLK_2 (Transmit DS3/E3/STS-1 line clock to
LIU – Channel 2)
81
The STS-1 Receive (Drop) Telecom Bus (associated with
Channel 2) will indicate that it is transmitting the C1 byte
(via the STS1RXD_D_2[7:0] output pins), by pulsing this
output pin “HIGH” (for one period of “STS1RXD_CK_2”)
and keeping the “STS1RXD_PL_2” output pin pulled
“LOW.
The STS-1 Receive (Drop) Telecom Bus (associated with
Channel 2) will indicate that it is transmitting the J1 byte
(via the STS1RXD_D_2[7:0] output pins), by pulsing this
output pin “HIGH” (for one period of “STS1RXD_CK_2”)
while the “STS1TXD_PL_2” output pin is pulled “HIGH”.
the
the
C1
J1
byte
byte
is
is
being
being
output
output
XRT94L33
via
via
Rev.1.2.0.
the
the