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XRT83VSH28IB-F View Datasheet(PDF) - Exar Corporation

Part Name
Description
MFG CO.
XRT83VSH28IB-F
Exar
Exar Corporation Exar
'XRT83VSH28IB-F' PDF : 74 Pages View PDF
XRT83VSH28
PRELIMINARY
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. P1.0.0
2.4 HDB3 Decoder
In single rail mode, RPOS can decode AMI or HDB3 signals. HDB3 is defined as any block of 4 successive
zeros replaced with 000V or B00V, so that two successive V pulses are of opposite polarity to prevent a DC
component. If the HDB3 decoder is selected, the receive path removes the V and B pulses so that the original
data is output to RPOS.
2.5 RPOS/RNEG/RCLK
The digital output data can be programmed to either single rail or dual rail formats. Figure 10 is a timing
diagram of a repeating "0011" pattern in single-rail mode. Figure 11 is a timing diagram of the same fixed
pattern in dual rail mode.
FIGURE 10. SINGLE RAIL MODE WITH A FIXED REPEATING "0011" PATTERN
0
0
1
1
0
RCLK
RPOS
FIGURE 11. DUAL RAIL MODE WITH A FIXED REPEATING "0011" PATTERN
0
0
1
1
0
RCLK
RPOS
RNEG
25
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