Overview
The NXP PCF7936AS/3851/C,1 is a high-performance security transponder designed for contactless authentication and memory access, particularly suited for vehicle immobilization applications. This device is part of the HITAG 2 family and is known for its robust security features and excellent sensitivity in both read and write modes. The transponder derives its power supply from the magnetic field generated by the basestation, eliminating the need for an additional battery. It features advanced mutual authentication protocols, including a 48-bit Secret Key and a 32-bit unique device identification number, ensuring secure communication between the transponder and the basestation.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 125 kHz |
| Supply Voltage | 5.6V to 27V |
| Operating Temperature Range | -40°C to +85°C |
| Moisture Sensitivity Level | 1 |
| Package Type | Leadless plastic stick package (SOT3851) |
| EEPROM Memory | 256 bits (128 bits for user data storage) |
| Authentication Time | 39 ms |
| Device Sensitivity | 35 µT |
| Data Retention | 20 years |
Key Features
- Programmable Security Transponder: Supports mutual authentication with 64/32 bit protocols.
- Unique Device Identification: Features a factory-programmed 32-bit unique device identification number.
- Secure Data Storage: Includes 128 bits of non-volatile user memory (EEPROM) with read/write protection capabilities.
- Fast Authentication: Achieves fast mutual authentication in 39 ms.
- Read Only Modes: Supports multiple Read Only modes for downward compatibility with common systems.
- Low Power Consumption: Derives power from the magnetic field generated by the basestation, ensuring low power consumption.
- Excellent Sensitivity: Offers high device sensitivity in both read and write modes.
- Leadless Package: Assembled in a small leadless stick-shaped plastic package (SOT3851).
Applications
The NXP PCF7936AS/3851/C,1 is primarily designed for vehicle immobilization systems, where secure contactless authentication is crucial. It is also suitable for other applications requiring high-security contactless identification and data storage, such as access control systems, industrial automation, and various IoT devices.
Q & A
- What is the operating frequency of the PCF7936AS/3851/C,1?
The operating frequency is 125 kHz.
- What is the supply voltage range for this transponder?
The supply voltage range is from 5.6V to 27V.
- What is the temperature range for the PCF7936AS/3851/C,1?
The operating temperature range is from -40°C to +85°C.
- Does the PCF7936AS/3851/C,1 require an external power source?
No, it derives its power supply from the magnetic field generated by the basestation.
- What type of package does the PCF7936AS/3851/C,1 come in?
It comes in a leadless plastic stick package (SOT3851).
- How much EEPROM memory does the PCF7936AS/3851/C,1 have?
It has 256 bits of EEPROM memory, with 128 bits reserved for user data storage.
- What is the authentication time for the PCF7936AS/3851/C,1?
The authentication time is 39 ms.
- What is the device sensitivity of the PCF7936AS/3851/C,1?
The device sensitivity is 35 µT.
- How long does the EEPROM data retain its value?
The EEPROM data retains its value for 20 years.
- What are some common applications for the PCF7936AS/3851/C,1?
Common applications include vehicle immobilization systems, access control systems, and various IoT devices requiring secure contactless identification.
