![](http://datasheet.mmic.net.cn/Exar-Corporation/XR2211ACDTR-F_datasheet_107233/XR2211ACDTR-F_14.png)
XR-2211A
14
Rev. 1.04
VCC
RL
5.1K
5%
RB
1.8m
5%
Loop
Phase
Detect
11
C1
2.7nF
5%
R1
35.2K
1%
8
FSK
Comp.
RF 178K
5%
CF
1nF
10%
7
Data
Output
Internal
Reference
0.1
F
10
VCO
14
13
12
Rx
20K
R0
20K
1%
CO
27nF
5%
2
0.1
F
Input
Signal
Lock
Detect
Comp.
VCO
Tune
Fine
6
LDOQ
5
LDOQN
Quad
Phase
Detect
Figure 10. Circuit Connection for FSK Decoding of Caller Identification Signals
(Bell 202 Format)
VCC
RL
5.1k
RB
Loop
Phase
Detect
C1
11
R1
RF
CF
8
FSK
Comp.
7
Internal
Reference
0.1
F
10
VCO
14
13
12
R0
C0
Rx
2
0.1
F
Input
Signal
Lock
Detect
Comp.
6 LDOQ
5 LDOQN
3
CD
RD
Between 400K and 600K
Quad
Phase
Detect
Figure 11. External Connectors for FSK Demodulation with Carrier
Detect Capability