w6691 Winbond Electronics Corp America, w6691 Datasheet - Page 22
w6691
Manufacturer Part Number
w6691
Description
Isdn S/t Interface Transceiver
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W6691.pdf
(106 pages)
- Current page: 22 of 106
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The transmitter and receiver are implemented by differential circuits to increase signal to noise ratio (SNR).
The nominal differential line pulse amplitude at 100
1:1 turn ration are needed at transmitter and receiver for voltage level translation and DC isolation.
To meet the electrical characteristic requirements in I.430, some additional circuits are needed. At the
transmitter side, the external resistors (5 to 10
the transmitter active impedance ( 20
TE
W6691
TR
TR
TR
TE1
TE1
W6691
W6691
Fig.7.2 W6691 wiring configuration in TE applications
(c) Extended passive bus configuration
(b) Short passive bus configuration
(a) Point-to-point configuration
50m
. . . . .
10m
10m
) when transmitting binary zeros. At the receiver side, the 1.8 k
100~200 m
100~200 m
) are used to adjust the output pulse amplitude and to meet
. . . . .
TE8
1000 m
22
termination is 750 mV, zero to peak. Transformers with
TE8
Preliminary W6691
Publication Release Date: Sep 2001
TR
TR
TR
TR : Terminating Resistor
NT
NT
NT
Revision 1.1
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