W66910CD Winbond Electronics, W66910CD Datasheet - Page 19

• Manufacturer Part Number: W66910CD
• Manufacturer: Winbond Electronics

Specifications of W66910CD

• Lead Free Status / Rohs Status: Not Compliant

The transmitter and receiver are implemented by differential circuits to increase signal to noise ratio (SNR). The nominal
differential line pulse amplitude at 100
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 (18 to 33
) when transmitting binary zeros. At the receiver side, the 1.8 k
(1.8 k
+8.2 k
) limit the peak current in impedance tests. The diode bridge is used for overvoltage protection.
SX1
SX2
SR1
SR2
) are used to adjust the output pulse amplitude and to meet the transmitter active impedance ( 20
FIG.7.3 EXTERNAL TRANSMITTER CIRCUITRY
FIG.7.4 EXTERNAL RECEIVER CIRCUITRY
18-33
18-33
GND
GND
1.8k
1.8k
termination is 750 mV, zero to peak. Transformers with 2:1 turn ration are needed at
-19 -
8.2k
8.2k
resistors protect the device inputs, while the 10 k
VDD
VDD
W66910 PCI ISDN S/T-Controller
2:1
2:1
Publication Release Date:
100
100
Data Sheet
Revision 1.0
Feb,2001
resistors