W55RFS27T3B Datasheet, PDF (11/16 Pages) Winbond – SUPER-REGENERATION RF RECEIVER

W55RFS27T3B
4.1.2 Application Circuit for 6 Control Functions
Set TEST = 0.
1. Use this circuit when F1 and F2 are required.(i.e., when more than 4 functions are required).
2. When a 9-V battery is used, an external power switch is required to save power
3. LEDs require extra components
VSPLY
TXOUT
TXOUT
SW1
Forward
SW3
Left turn
S1
R3 1K
S2
R4 1K
Input Protection
SW2
Backward
SW4
Right turn
SW5 F1
SW6 F2
JP3
1
2
Power In
VDD
BT1
BAT
CKSEL0
CKSEL1
VDD
VDD
U1
1
S3
16
S2
2 _S4
S1 ¹⁵
3
CKSEL0
14
TXOUT
4 _TEST
ID0 ¹³
5 _CKSEL1
ID1 ¹²
6 _ANT
X2 ¹¹
7 _VSS
X1 ¹⁰
8
VDD
9
RESET
W55RFS27T3B
300
LED
R5
LED1
100u
C0
1N4148
D1
1N4148
D2
S1
S2
LED control circuit
S2
S1
TXOUT
ID0
ID1
JP6
1
2
3
ID0
VDD
ID0
JP7
1
2
3
ID1
C8 7p
VDD
ID1
R1
20K
49.86MHz
Overtone Crystal
ANTENNA
L1
39nH
L2
C13 47n
1uH
Dependent on Antenna
C7
240p
S1
R5 120
VDD
BT1 PWR
9V
D3
C18 +
C19
4.3V
470u
47n
L7
1uH
C9
7p
C33
47n
* 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)
CKSEL0
VDD
CKSEL1
For 49MHZ
Title
Size
A
Date:
W55RFS27T3B Application Circuit (49MHz)
Document Number
{Doc}
Monday, May 03, 2004
Sheet
Rev
{RevCode}
1
of 1
- 11 -
Publication Release Date:June 8, 2005
Revision A1