HCS412/P Microchip Technology, HCS412/P Datasheet - Page 15

• Manufacturer Part Number: HCS412/P
• Description: IC CODE HOP ENCODR/TRNSPOND 8DIP
• Manufacturer: Microchip Technology
• Type: Code Hopping Encoder and Transponderr

Specifications of HCS412/P

• Applications: Remote Secure Access, Keyless Entry
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE 3-8:
FIGURE 3-9:
FIGURE 3-10: LONG PREAMBLE ENABLED (LPRE)
2002 Microchip Technology Inc.
AFSK = , RFEN = 1
AFSK = 1, RFEN =
First Code Word
Consecutive Code Words
NORMAL OPERATION
LOW VOLTAGE OPERATION
S2/RFEN/LC1
S2/RFEN/LC1
SWITCH
SWITCH
SWITCH
SWITCH
DATA
DATA
LED
LED
DATA
DATA
RF ENABLE/ASK/FSK OPTIONS
LED OPERATION
First Code Word
- Long Preamble
T
TD
T
Code Word
LEDON
Code Word
T
LEDON
Code Word
Code Word
Code Word
Code Word
T
Preliminary
LEDOFF
Second Code Word
- Normal Preamble
T
LPRE
Code Word
Code Word
Code Word
Code Word
T
LEDL
Code Word
Code Word
Third Code Word
- Normal Preamble
Header
HCS412
DS41099C-page 15