XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 204

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT84L38
OCTAL T1/E1/J1 FRAMER
The Transmit Single-frame Synchronization signal should pulse “High” for one DS1 bit period (648ns) at the
Framing bit position of each DS1 frame. By sampling the “High” pulse on the Transmit Single-frame
Synchronization signal, the framer can position the beginning of a DS1 frame.
The Transmit Multi-frame Synchronization signal should pulse HIGH for one DS1 bit period (648ns) at the
Framing bit position of the first frame of a DS1 multi-frame. By sampling the HIGH pulse on the Transmit Multi-
frame Synchronization signal, the framer can position the beginning of a DS1 super-frame.
It is the responsibility of the Terminal Equipment to provide serial input data through the TxSer_n pin aligned with
the Transmit Single-frame Synchronization signal and the Transmit Multi-frame Synchronization signal. See
Figure 23
Equipment with the Transmit Serial clock being the timing source of transmit section.
F
S
IGURE
OURCE
23. I
below for how to connect the Transmit Payload Data Input Interface block to the local Terminal
NTERFACING
XRT84L38
Equipment
Terminal
TO LOCAL
T
ERMINAL
TxSerClk_7
TxSer_7
TxMSync_7
TxSync_7
TxTSClk_7
TxTSb[4:0]_7
TxSerClk_0
TxSer_0
TxMSync_0
TxSync_0
TxTSClk_0
TxTSb[4:0]_0
184
E
QUIPMENT WITH
Data Input
Data Input
Transmit
Interface
Transmit
Interface
Payload
Payload
Chn 0
Chn 7
XRT84L38
T
X
S
ER
C
LK
_
N AS
T
RANSMIT
REV. 1.0.1
T
IMING