
XRT7298
5HY
PIN CONFIGURA TION
51'$7$
53'$7$
,&7
7;/(9
9
''
$
77,3
75,1*
*1'$
07,3
05,1*
'02
5&/.2
5326
51(*
5&/.
5/223
//223
'6676
(
7$26
9
''
'
73'$7$
71'$7$
7&/.
*1''
(1&2',6
'(&2',6
%39
3//287
28 Lead SOJ (J edec,0.300”)
51'$7$
53'$7$
,&7
7;/(9
9
''
$
77,3
75,1*
*1'$
07,3
05,1*
'02
5&/.
5/223
//223
'6676
(
7$26
9
''
'
73'$7$
71'$7$
7&/.
*1''
(1&2',6
5&/.2
5326
'(&2',6
%39
51(*
3//287
28 Lead PDIP (0.600”)
PIN DESCRIPTION
Pin #
Symbol
Type
Description
5&/.
,
Receive Clock Input.
,QSXW VDPSOLQJ FORFN IRU 53'$7$ DQG 51'$7$
5/223
,
Remote Loop Back.
$ KLJK RQ WKLV SLQ FDXVHV 53'$7$ DQG 51'$7$ WR WUDQVPLWWHG WR WKH
OLQH XVLQJ 5&/. 6HWWLQJ 5/223 DQG //223 KLJK VLPXOWDQHRXVO\ LV QRW SHUPLWWHG
//223
,
Local Loop Back.
$ KLJK RQ WKLV SLQ FDXVHV 73'$7$ DQG 71'$7$ WR SDVV WKURXJK WKH HQ
FRGHU DQG RXWSXW DW 5326 DQG 51(* UHVSHFWLYHO\6HWWLQJ //223 DQG 5/223 KLJK VLPXOWD
QHRXVO\ LV QRW SHUPLWWHG
'6676
(
,
DS3, STS-1 or E3 Select Pin
$ KLJK RQ WKLV SLQ VHOHFWV '6 RU 676 RSHUDWLRQ DQG VHWV WKH
HQFRGHU DQG GHFRGHU LQ %=6 PRGH $ ORZ VHOHFWV ( DQG VHWV WKH HQFRGHU DQG GHFRGHU LQ
+'% PRGH
7$26
,
Transmit All Ones Select
$ KLJK RQ WKLV SLQ FDXVHV D FRQWLQXRXV $0, DOO ·V SDWWHUQ WR EH
WUDQVPLWWHG WR WKH OLQH 7KH IUHTXHQF\ LV GHWHUPLQHG E\ 7&/.
5 V Digital Supply
±
IRU DOO ORJLF FLUFXLWU\
9
''
'
73'$7$
,
Transmit Positive Data
73'$7$ LV VDPSOHG RQ WKH IDOOLQJ HGJH RI 7&/. 3LQ DQG SLQ
FDQ EH WLHG WRJHWKHU IRU ELQDU\ LQSXW VLJQDOV
71'$7$
,
Transmit NegativeData.
71'$7$ LV VDPSOHG RQ WKH IDOOLQJ HGJH RI 7&/. 3LQ DQG SLQ
FDQ EH WLHG WRJHWKHU IRU ELQDU\ LQSXW VLJQDOV
7&/.
,
Transmit Clock
IRU 73'$7$ DQG 71'$7$
*1''
Digital Ground
IRU DOO ORJLF FLUFXLWU\
(1&2',6
,
Encoder Disable.
$ KLJK RQ WKLV SLQ GLVDEOHV %=6 RU +'% HQFRGLQJ IXQFWLRQV XQOHVV RYHU
ULGGHQ E\ 7$26 UHTXHVW 7KLV SLQ PXVW EH VHW KLJK LI 73'$7$ DQG 71'$7$ DUH DOUHDG\ HQ
FRGHG
'(&2',6
,
DecoderDisable
$ KLJK RQ WKLV SLQ GLVDEOHV %=6 RU +'% GHFRGLQJ IXQFWLRQV
This Material Copyrighted by Its Respective Manufacturer