HCS473T-I/SN Microchip Technology, HCS473T-I/SN Datasheet - Page 3

• Manufacturer Part Number: HCS473T-I/SN
• Description: IC KEELOQ 3AXIS TRANSCODER 8SOIC
• Manufacturer: Microchip Technology
• Series: KEELOQ®r
• Type: Code Hopping Encoder and Transponderr

Specifications of HCS473T-I/SN

• Applications: Access Control Systems
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification

FEATURES
Encoder Security
• Read protected 64-bit encoder key
• 69-bit transmission length
• 60-bit, read protected seed for secure learning
• Programmable 32-bit serial number
• Non-volatile 16/20-bit synchronization counter
Encoder Operation
• 2.05V to 5.5V operation
• Four switch inputs – up to 15 functions codes
• PWM or Manchester modulation
• Selectable Baud Rate (416 - 5,000 bps)
• Transmissions include button queuing information
• PLL interface
Transponder Security
• 2 read protected 64-bit Challenge/Response keys
• Two IFF encryption algorithms
• 16/32-bit Challenge/Response
• Separate Vehicle ID and Token ID
• 2 vehicles supported
• CRC on all communication
Transponder Operation
• Three sensitive transponder inputs
• Bi-directional transponder communication
• Transponder in/RF out operation
• Anticollision of multiple transponders
• Intelligent damping for high Q-factor LC-circuits
• Low battery operation
• Passive proximity activation
• 64-bit secure user EEPROM
• Fast reaction time
Peripherals
• Low Voltage Detector
• On-board RC oscillator with ±10% variation
 2002 Microchip Technology Inc.
K
EE
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Preliminary
3-Axis Transcoder
Package Types
Block Diagram
Typical Applications
• Passive entry systems
• Automotive remote entry systems
• Automotive alarm systems
• Automotive immobilizers
• Gate and garage openers
• Electronic door locks (Home/Office/Hotel)
• Burglar alarm systems
• Proximity access control
• Passive proximity authentication
RFEN
S3/
S0
S1
S2
PDIP, SOIC
LCX
LCY
LCZ
S3/RFEN
Wake-up
Detector
Voltage
Control
Low
V
LCX
LCY
DDT
S0
S1
S2
3 Input Transponder
Oscillator
Internal
1
2
3
4
5
6
7
HCS473
Circuitry
Control
Logic
EEPROM
14
13
12
10
11
9
8
RESET and
DS40035C-page 1
V
V
LED
DATA
V
LCCOM
LCZ
DD
SS
Control
SST
Power
Output
Driver
Data
LED
V
LCCOM
V
DDT
SST
DATA
LED
V
V
DD
SS