參數(shù)資料
型號: XRT4500CV
廠商: EXAR CORP
元件分類: 通信及網(wǎng)絡
英文描述: MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP80
封裝: 14 X 14 MM, 1.40 MM HEIGHT, TQFP-80
文件頁數(shù): 66/99頁
文件大小: 1384K
代理商: XRT4500CV
á
XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.7
63
and TX2 respectively. Figure 30 shows how capacitor
C having a value of 100 to 1000 pF bypasses this
point to ground to reduce common mode noise. This
capacitor shorts current caused by differential driver
rise and fall time or propagation delay miss-match di-
rectly to ground. If it was not present, the flow of this
current through the 125
resistor to ground would
cause common mode voltage spikes at the TXA and
TXB outputs.
F
IGURE
36. R
ECEIVER
T
ERMINATION
R1
20
S1
RXxA
RXxB
R3
85
R4
30
R6
125
S3
R2
20
S2
R4
30
R8
10K
S4
R10
4K
R11
6K
R9
4K
R12
6K
Rx
T
ABLE
6: R
ECEIVER
S
WITCHES
M
ODE
S
WITCHES
S1
S2
S3
S4
V.35
Closed
Closed
Open
Open
V.11 Terminated
Open
Open
Closed
Open
V.11 Unterminated
Open
Open
Open
Open
V.10
Open
Open
Open
Open
V.28
Open
Open
Open
Closed
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