ST5481 datasheet(15/18 Pages) STMICROELECTRONICS

Nome de Peças	ST5481

Descrição Electrónicos	L.O.U.I.S - LOW COST USB ISDN SOLUTION

PDF	18 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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ST5481

15/18

10.4 - Line Side Isdn S Interface

Note

UIT-TI430, ETSI 300012, ANSI T1.605 standards compliance.

11 - APPLICATION SYNOPTIC

11.1 - Global Environment

Table 12 : ISDN Interface Electrical Characteristics: RIREF = 120kΩ

Symbol

Parameter

Minimum

Typical

Maximum

Unit

ITX

TX Line Driver current with 70

Ω between LOP / LON

[ 70 (total)= 50 (load) + 2 x 7 (serial) + 2 x 3 (serial) ]

14.25

15.75

ITX

TX Line Driver current with 420

Ω between LOP / LON

[ 420 (total)= 400 (load) + 2 x 7 (serial) + 2 x 3 (serial) ]

3mA

ITX

TX Line Driver current with 25.6

Ω between LOP / LON

[ 25.6(total)= 5.6 (load) + 2 x 7 (serial) + 2 x 3 (serial) ]

ZOTX

Transmit Output impedance during pulse.

( 20

Ω is obtained as total min value with serial resistors:

[ 20(total)= ZOTX+ 7(serial) + 7(serial) ])

Ω

ZTX

Impedance when inactive, between LOP / LON

2.5

Ω

ZINRX

Receive Input impedance between LIP / LIN

2.5

Ω

Figure 8 : Synoptic

ISDN USB dongle

RJ45

USB

ST5481

NT1

Usb cable

S interface

Plug B

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