HCS300-I/SN Microchip Technology, HCS300-I/SN Datasheet - Page 4

• Manufacturer Part Number: HCS300-I/SN
• Description: IC CODE HOPP ENCODER 15FUNC8SOIC
• Manufacturer: Microchip Technology
• Type: Code Hopping Encoderr

Specifications of HCS300-I/SN

• Applications: Remote Secure Access, Keyless Entry
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Ic Function: Code Hopping Encoder
• Supply Voltage Range: -0.3V To 6.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SOIC
• No. Of Pins: 8
• Leaded Process Compatible: Yes
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HCS300
FIGURE 1-2:
FIGURE 1-3:
NOTE: Circled numbers indicate the order of execution.
DS21137F-page 4
EEPROM Array
Serial Number
Sync Counter
Crypt Key
5
Perform Function
Indicated by
Button Press
button press
Information
BUILDING THE TRANSMITTED CODE WORD (ENCODER)
BASIC OPERATION OF RECEIVER (DECODER)
1
2
Received Information
Serial Number
Check for
Match
Synchronization
Encrypted Data
Decrypted
K
Decryption
Algorithm
32 Bits of
Counter
EE
Encryption
Algorithm
L
K
3
OQ
Button Press
EE
Information
L
OQ
Transmitted Information
Serial Number
Manufacturer Code
4
EEPROM Array
Check for
Serial Number
Match
Sync Counter
Crypt Key
2001 Microchip Technology Inc.
Encrypted Data
32 Bits