Features: Security
• Programmable 28-bit serial number
• Programmable 64-bit encryption key
• Each transmission is unique
• 66-bit transmission code length
• 32-bit hopping code
• 34-bit fixed code (28-bit serial number,4-bit button code, 2-bit status)
• Encryption keys are read protected
Operating
• 3.5V-13V operation 2.0V min. using the Step up feature)
• Three button inputs
• 7 functions available
• Selectable baud rate
• Automatic code word completion
• Battery low signal transmitted to receiver
• Non-volatile synchronization data
Other
• Simple programming interface
• On-chip EEPROM
• On-chip oscillator and timing components
• Button inputs have internal pull-down resistors
• Minimum component count
• Synchronous Transmission mode
• Built-in step up regulatorApplication• The HCS201 is ideal for Remote Keyless Entry
(RKE) applications. These applications include:
• Automotive RKE systems
• Automotive alarm systems
• Automotive immobilizers
• Gate and garage door openers
• Identity tokens
• Burglar alarm systemsPinout
Specifications
| Protocols |
1 |
| Transmission Code Length Bits |
66 |
| Other Features |
Entry level, Fixed code support, Battery low indicator, step-up voltage operation |
| Seed Length |
32 |
| Code Hoppings Bits |
32 |
| Operating Voltage (V) |
3.5 to 13.0 |
| Tunable OSC |
Yes |
| Function Codes |
7 |
| CRC |
No |
|
Symbol |
Item |
Rating |
Units |
|
VDD |
Supply voltage |
-0.3 to 13.5 |
V |
|
VIN |
Input voltage |
-0.3 to VDD + 0.3 |
V |
|
VOUT |
Output voltage |
-0.3 to VDD + 0.3 |
V |
|
IOUT |
Max output current |
25 |
mA |
|
TSTG |
Storage temperature |
-55 to +125 |
C (Note) |
|
TLSOL |
Lead soldering temp |
300 |
C (Note) |
Note 1: Stresses above those listed under "ABSOLUTE MAXIMUM RATINGS" may cause permanent damage to
the device.DescriptionThe HCS201 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS201 utilizes the KEELOQ code hopping technology, incorporating high security, a small package outline and low cost. The HCS201 is a perfect solution for unidirectional remote keyless entry systems and access control systems.
The HCS201 combines a 32-bit hopping code, generated by a nonlinear encryption algorithm, with a 28-bit serial number and 6 information bits to create a 66-bit code word. The code word length eliminates the threat of code scanning and the code hopping mechanism makes each transmission unique, thus rendering code capture and resend schemes useless.
The crypt key, serial number and configuration data are stored in an EEPROM array which is not accessible via any external connection. The EEPROM data is programmable but read-protected. The data can be verified only after an automatic erase and programming operation. This protects against attempts to gain access to keys or manipulate synchronization values. The HCS201 provides an easy-to-use serial interface for programming the necessary keys, system parameters and configuration data.
The HCS201 is designed as the code hopping encoder that is a perfect solution for unidirectional remote keyless entry systems and access control systems. This device can be used in Remote Keyless Entry (RKE) applications such as (1)automotive RKE systems; (2)automotive alarm systems; (3)automotive immobilizers; (4)gate and garage door openers; (5)identity tokens; (6)burglar alarm systems.
Features of the HCS201 are:(1)Programmable 28-bit serial number;(2)Each transmission is unique;(3)66-bit transmission code length;(4)32-bit hopping code;(5)Encryption keys are read protected;(6)Automatic code word completion;(7)Battery low signal transmitted to receiver;(8)PWM and Manchester modulation;(9)On-chip oscillator and timing components;(10)Minimum component count.
The absolute maximum ratings of the HCS201 can be summarized as:(1)Supply voltage: -0.3 to 13.5 V;(2)Input voltage: -0.3 to VDD + 0.3 V;(3)Output voltage: -0.3 to VDD + 0.3 V;(4)Max output current: 50 mA;(5)Storage temperature: -55 to +125 °C;(6)Lead soldering temperature: 300 °C;(7)ESD rating: 4000 V. If you want to know more information about it, please download the datasheet in www.seekic.com or www.chinaicmart.com .
HCS201 Data Sheet
