HCS512 Datasheet, PDF (17/20 Pages) Microchip Technology – KEELOQ CODE HOPPING DECODER

FIGURE 9-3: TYPICAL DECODER APPLICATION CIRCUIT
VDD _{LOW VOLTAGE DETECTOR—DO NOT OMIT}
VI ^G VO
N
D
12V ₁
2
GND ³
1N4004/7
100 µF
LM7805
VI _G VO
N
D
POWER SUPPLY
VDD
100µF
10K
VDD
1 RECEIVE DATA INPUT
10K ^P2
10 pF
4 _MCLR
3 _NC
16 _OSCIN
15 _OSCOUT
14
V
D
D
NC ¹⁷
RFIN ¹⁸
LRNIN ¹
LRNOUT ²
S0 ⁶
S1 ⁷
S2 ⁸
S3 ⁹
VLOW ¹⁰
G SLEEP ¹¹
N
CLK ¹²
D
DAT ¹³
HCS512 ⁵
VDD
10K
P3
P4
100K
1K
LRNOUT
1K
S0
1K
S1
1K
S2
1K
S3
1K
Vlow
DATA
P4
CLOCK
P3
RESET
P2
GND
P1
LEARN
BUTTON
In Circuit
Programming Pads