W55RFS27T1B Datasheet, PDF (11/15 Pages) Winbond – SUPER-REGENERATION RF TRANSMITTER

W55RFS27T1B DataSheet
4.1.2 Application Circuit for 6 Control Functions
Set TEST = 0,
1. Used when need F1 and F2.(more than 4 control functions)
2. When use 9V battery, an external power switch is required for power-saving
3. Need extra components to light LED
V SP LY
T XOUT
T XOUT
SW1
Fo rward
SW3
Le ft tu rn
S1
R3 1K
SW2
B ackward
S2
R4 1K
SW4
Rig ht turn
Input Protection
30 0
LE D
R5
LE D1
10 0u
C0
1N41 48
D1
1N41 48
D2
S1
S2
LED control circuit
S W5 F1
S W6 F2
CKS E L0
CKS E L1
V DD
V DD
C18 +
10 u
U1
1 _S3
S 2 ¹⁶
2 _S4
S 1 ¹⁵
3 _{CKS E L0}
T XOUT ¹⁴
4 _{T ES T}
ID0 ¹³
5 _{CKS E L1}
ID1 ¹²
6
A NT
11
X2
7 _{V SS}
X 1 ¹⁰
8
V DD
9
RES E T
W5 5RFS 27T 3B
C19
47 n
S2
S1
T XOUT
ID0
ID1
C8 7p
49 .8 6MHz
R1
Overtone Crystal
20 K
A NT E NNA
L1
39 nH
L2
C13 47 n
1u H
Dependent on Antenna
C7
24 0p
JP3
1
2
P ower In
V DD
BT1
B AT
JP6
1
2
3
ID0
V DD
ID0
JP7
1
2
3
ID1
V DD
ID1
L7
1u H
C9
7p
C33
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 3B Ap pl ic atio n Ci rcui t (49MHz)
S ize
A
Docu ment Nu mber
{Do c}
Date:
T ues day, Jul y 06, 200 4
S hee t
1
Rev
{Re vCo de}
of 1
W55RFS27T1B Application Schematic BOM(6-function):
Item
Qty
Reference
Part
________________________________________________________________________________
1
1
C7
240p
2
2
C8,C9
7p
3
3
C13,C19,C33
47n
4
1
C18
10u
5
1
L1
39nH
6
2
L2,L7
1uH
7
1
R1
20K
8
1
U1
W55RFS27T1B
9
1
Y1
49.86MHz
11
Revision: A3.0
Publish Date: Feb. 2010