W55RFS27T1B Datasheet, PDF (12/15 Pages) Winbond – SUPER-REGENERATION RF TRANSMITTER

10
1
11
1
12
2
13
1
14
2
LED1
C0
D2,D1
R5
R4,R3
W55RFS27T1B DataSheet
LED
100u
1N4148
300
1K
(Optional)
(Optional)
(Optional)
(Optional)
(Optional)
4.1.3 Application Circuit for 4 Control Functions
Set TEST = 1,
1. Only 4 control functions provided
2. No need to add external power switch when use 9V battery.
3. LED can be directly driven by TXOUT
S W3 Le ft-tu rn
S W4 Rig ht-T urn
D4
1N41 48
CKS E L0
CKS E L1
V DD
A NT E NNA
L1
39 nH
L2
C13 47 n
1u H
Dependent on Antenna
C7
24 0p
D3
1N41 48
V DD
D2
1N41 48
U1
1 _S3
S 2 ¹⁶
2
S4
15
S1
3 _{CKS E L0}
T XOUT ¹⁴
T XOUT
4
T ES T
13
ID0
ID0
5 _{CKS E L1}
ID1 ¹²
ID1
6
A NT
11
X2
7 _{V SS}
X 1 ¹⁰
8
V DD
9
RES E T
W5 5RFS 27T 1B
D1
1N41 48
SW2
B ackward
S W1 Fo rward
T XOUT
C8 7p
30 0
R5
LE D
LE D1
49 .8 6MHz
R1
Overtone Crystal
20 K
JP6
1
2
3
ID0
V DD
ID0
JP7
1
2
3
ID1
V DD
ID1
L7
1u H
C9
7p
C33
47 n
BT1
9V
R5 12 0
V DD
D3
C18 +
C19
4.3V
47 0u
47 n
* 27MHz,(L1,C7)= (56nH, 470pF), (L7,C33)=none
* 35MHz,(L1,C7)= (47nH, 360pF), (L7,C33)=(3.3uH,47n)
* 40MHz,(L1,C7)= (47nH, 300pF), (L7,C33)=(2.2uH,47n)
* 49MHz,(L1,C7)= (39nH, 240pF), (L7,C33)=(1uH,47n)
CKS E L0
V DD
CKS E L1
For 49MHZ
T itl e
W5 5RFS 27T 1B Ap pl ic atio n Ci rcui t (49MHz)
S ize
A
Docu ment Nu mber
{Do c}
Date:
T ues day, Ma y 0 4, 2 004
S hee t
1
Rev
{Re vCo de}
of 1
12
Revision: A3.0
Publish Date: Feb. 2010