w6692 Winbond Electronics Corp America, w6692 Datasheet - Page 22

• Manufacturer Part Number: w6692
• Description: Pci Bus Isdn S/t-controller
• Manufacturer: Winbond Electronics Corp America

differential line pulse amplitude at 100
transmitter and receiver for voltage level translation and DC isolation.
external resistors (18 to 33 ) are used to adjust the output pulse amplitude and to meet the transmitter active impedance ( 20
when transmitting binary zeros). At the receiver side, the 1.8 k
(1.8 k
To meet the electrical characteristic requirements in I.430, some additional circuits are needed. At the transmitter side, the
The transmitter and receiver are implemented by differential circuits to increase signal to noise ratio (SNR). The nominal
+8.2 k
) limit the peak current in impedance tests. The diode bridge is used for overvoltage protection.
SX1
SX2
SR1
SR2
FIG.7.3 EXTERNAL TRANSMITTER CIRCUITRY
FIG.7.4 EXTERNAL RECEIVER CIRCUITRY
18-33
18-33
GND
GND
termination is 750 mV, zero to peak. Transformers with 2:1 turn ration are needed at
1.8k
1.8k
-22 -
8.2k
resistors protect the device inputs , while the 10 k
8.2k
VDD
VDD
2:1
W6692 PCI ISDN S/T-Controller
2:1
Publication Release Date:
100
Preliminary Data Sheet
100
Sep 30, 1999
Revision 0.9
resistors