W55RFS27T3 Datasheet, PDF (9/12 Pages) List of Unclassifed Manufacturers – Super-Regeneration RF Transmitter

W55RFS27T3 DataSheet
Design Information
4.1 W55RFS27T3 Reference Design
4.1.1 W55RFS27T3 Application Circuit
JP1
1
2
3
PTX
JP3
1
2
3
CKS E L
V DD
PTX
V DD
CKS E L
JP6
1
2
3
ID0
JP7
1
2
3
ID1
V DD
ID0
V DD
ID1
JP5
1
2
3
4
5
6
7
8
E XT
T XOUT
SW1
Fo rward
S1
S2
S3
S4
T XOUT
PTX
V DD
S1
SW2
B ackward
V SP LY
30 0
LE D
10 0u
1N41 48
1N41 48
SW3
T XOUT
Le ft tu rn
S2
SW4
Rig ht turn
S1
S2
LED control circuit
S W5 F1
S W6 F2
CKS E L
PTX
V DD
A NT E NNA
L1
27 0nH
C7
10 0p
L2
3.3u H
C13 47 n
U1
1 _S3
S 2 ^{16 S 2}
2 _S4
S 1 ^{15 S 1}
CKSEL = 0 for 27MHz 3
CKSEL = 1 for 49MHz
4
CKS E L
T ES T
T XOUT ¹⁴
ID0 ¹³
T XOUT
ID0
PTX=0 for VCC < 3.3V 5
PTX=1 for VCC > 3.3V
6
PTX
A NT
12
ID1
ID1
X 2 ¹¹
7
V SS
10
X1
V DD
8 _{V SP LY}
RES E T
9
C18 +
10 u
W55RFS27T3
C19
47 n
L6
1.5u H
C20
47 n
L-C Oscillation
(No X'tal use only)
27 .1 45MHz
L7
6.8u H
C33
47 n
For Overtone X'tal only
9
Revision: A3.0
Publish Date: Dec. 2010