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SPRF2738A
7. APPPLICATION CIRCUITS
7.1. 27MHz Wireless Mouse or Keyboard Receiver RF Module
SPRF2738A is almost compatible with MC3361
L1: Prevents Crystal from Base Tone Oscillating
F1: 455k Band Pass Filter
X1
26.690MHz
C1
2.2n
C6
27
L2
TOKO 8128
C12
39
L1
10uH
C5
30
R4
100
C7
104
C8
2.2n
C3
103
C13
C11
104
C10
103
F1
Murata CFWM455E
1
1
2
2
R5
47k
U1
SPRF2738A-PS031
R1
10k
VCC
*Note
Digital Data Output
27.145MHz RF Input
VCC
49.86MHz RF Input
Audio Output
Note: C8 capacitor value should be changed to 2.2nF when MC3361 is replaced.
7.2. 49MHz FM Baby Monitor Receiver
L1: Prevents Crystal from Base Tone Oscillating
F1: 455k Band Pass Filter
X1
49.405MHz
C6
27
L2
TOKO 8128
C12
39
L1
3.3uH
C5
30
R4
100
C7
104
C3
103
C13
C11
104
C10
103
F1
Murata CFWM455E
1
1
2
2
R5
47k
U1
SPRF2738A-PS031
R1
10k
C1
1u
C4
0.1u
R2
27k
C8
1n
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
8
APR. 30, 2003
Version: 1.2
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