LOUIS View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'LOUIS' PDF : 18 Pages View PDF
ST5481
10.4 - Line Side Isdn S Interface
Table 12 : ISDN Interface Electrical Characteristics: RIREF = 120kΩ
Symbol
Parameter
Minimum Typical Maximum Unit
ITX
ITX
ITX
ZOTX
ZTX
ZINRX
TX Line Driver current with 70Ω between LOP / LON
[ 70 (total)= 50 (load) + 2 x 7 (serial) + 2 x 3 (serial) ]
TX Line Driver current with 420Ω between LOP / LON
[ 420 (total)= 400 (load) + 2 x 7 (serial) + 2 x 3 (serial) ]
TX Line Driver current with 25.6Ω between LOP / LON
[ 25.6(total)= 5.6 (load) + 2 x 7 (serial) + 2 x 3 (serial) ]
Transmit Output impedance during pulse.
( 20Ω is obtained as total min value with serial resistors:
[ 20(total)= ZOTX+ 7(serial) + 7(serial) ])
Impedance when inactive, between LOP / LON
Receive Input impedance between LIP / LIN
Note UIT-TI430, ETSI 300012, ANSI T1.605 standards compliance.
14.25
15
15.75 mA
3
mA
26
mA
6
kΩ
2.5
kΩ
2.5
kΩ
11 - APPLICATION SYNOPTIC
11.1 - Global Environment
Figure 8 : Synoptic
Usb cable
USB
Plug B
ISDN USB dongle
ST5481
RJ45
NT1
S interface
15/18
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