XRT83VSH28IB-F View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XRT83VSH28IB-F

8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

Exar Corporation 

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REV. P1.0.0

PRELIMINARY

XRT83VSH28

8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

TABLE 5: TIMING SPECIFICATIONS FOR TCLK/TPOS/TNEG

PARAMETER

SYMBOL

MIN

TYP

MAX

TCLK Duty Cycle

TCDU

30

50

70

Transmit Data Setup Time

TSU

50

-

-

Transmit Data Hold Time

THO

30

-

-

TCLK Rise Time (10% to 90%)

TCLKR

-

-

40

TCLK Fall Time (90% to 10%)

TCLKF

-

-

40

UNITS

%

ns

ns

ns

ns

NOTE: VDD=3.3V ±5%, TA=25°C, Unless Otherwise Specified

3.2 HDB3 Encoder

In single rail mode, the LIU can encode the TPOS input signal to AMI or HDB3 data. With HDB3 encoding

selected, any sequence with four or more consecutive zeros in the input will be replaced with 000V or B00V,

where "B" indicates a pulse conforming to the bipolar rule and "V" representing a pulse violating the rule. An

example of HDB3 encoding is shown in Table 6.

TABLE 6: EXAMPLES OF HDB3 ENCODING

NUMBER OF PULSES BEFORE

NEXT 4 ZEROS

Input

0000

HDB3 (Case 1)

Odd

000V

HDB3 (Case 2)

Even

B00V

28

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