xr88c681 Exar Corporation, xr88c681 Datasheet - Page 95
xr88c681
Manufacturer Part Number
xr88c681
Description
Cmos Dual Channel Uart Duart
Manufacturer
Exar Corporation
Datasheet
1.XR88C681.pdf
(101 pages)
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Rev. 2.11
C/T CLK
X1/CLK
C1
C2
RXC
TXC
3.6864MHz
Parallel Resonant Crystal
C1: 10pF + (Stray < 5pF)
C2: 10pF + (Stray < 5pF)
R1: 100ohm
R2: 100ohm
R1
R2
t
t
t
CLK
CTC
RTX
X1
X2
XR88C681
Figure 56. Clock Timing
95
t
t
t
CLK
CTC
RTX
C1
C2
Parallel Resonant Crystal
C1: 10 - 15pF + (Stray < 5pF)
C2: 0 - 5pF + (Stray < 5pF)
3.6864MHz
XR88C681
X1
X2
XR88C681
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