W55RFS27T3B Datasheet, PDF (13/16 Pages) Winbond – SUPER-REGENERATION RF RECEIVER

W55RFS27T3B
SW3 Left-turn
SW4 Right-Turn
D4
1N4148
CKSEL0
CKSEL1
VDD
ANTENNA
L1
39nH
L2
C13 47n
1uH
Dependent on Antenna
C7
240p
D3
1N4148
VDD
D2
U1
1N4148
1
S3
16
S2
2 _S4
S1 ¹⁵
3 _CKSEL0
TXOUT ¹⁴
TXOUT
4
TEST
13
ID0
ID0
5 _CKSEL1
ID1 ¹²
ID1
6
ANT
11
X2
7 _VSS
X1 ¹⁰
8
VDD
9
RESET
W55RFS27T3B
D1
1N4148
SW2
Backward
SW1 Forward
TXOUT
C8 7p
49.86MHz
R1
Overtone Crystal
20K
300
R5
LED
LED1
JP6
1
2
3
ID0
VDD
ID0
JP7
1
2
3
ID1
VDD
ID1
L7
1uH
C9
7p
C33
47n
R5 120
VDD
BT1
9V
D3
C18 +
C19
4.3V
470u
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}
Tuesday, May 04, 2004
Sheet
Rev
{RevCode}
1
of 1
- 13 -
Publication Release Date:June 8, 2005
Revision A1