Overview
The PCF7936AS/3851,122 is a programmable security transponder developed by NXP USA Inc., part of the HITAG 2 series. This RFID tag is designed for contactless authentication and memory access, making it ideal for applications requiring high security and performance. The device is particularly suited for modern vehicle immobilizer systems due to its excellent device sensitivity and short authentication time.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| Manufacturer Part Number | PCF7936AS/3851,122 |
| Frequency | 125 kHz |
| Memory Type | Read/Write |
| Writable Memory | 128 KB (User) |
| Technology | Passive |
| Style | Encapsulated |
| Series | HITAG 2 |
| Size / Dimension | 11.90 mm x 5.90 mm x 2.90 mm |
| Lead Free Status / RoHS Status | Contains Lead / RoHS Non-Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- Programmable Security Transponder with 64/32 bit mutual authentication
- 32 bit unique device identification number
- 48 bit Secret Key for enhanced security
- Fast authentication time of 39 ms
- 128 bit non-volatile user memory (EEPROM) with read/write protection capabilities
- EEPROM access in plain or cipher mode
- Read Only modes for downward compatibility
- Excellent device sensitivity in read and write mode (35 µT)
- 20 year EEPROM data retention
- Leadless stick-shaped plastic package
Applications
The PCF7936AS/3851,122 is primarily used in modern vehicle immobilizer systems due to its high security features and performance. It is also suitable for other applications requiring contactless authentication and secure memory access, such as access control systems, secure data storage, and various IoT devices.
Q & A
- What is the frequency of the PCF7936AS/3851,122 RFID tag?
The frequency of the PCF7936AS/3851,122 is 125 kHz. - What type of memory does the PCF7936AS/3851,122 have?
The device has read/write memory with 128 KB of user-accessible EEPROM. - What is the authentication time of the PCF7936AS/3851,122?
The authentication time is 39 ms. - Does the PCF7936AS/3851,122 support read/write protection?
Yes, it supports read/write protection capabilities for the EEPROM. - What is the unique identification feature of the PCF7936AS/3851,122?
The device has a factory-programmed 32 bit unique identification number. - What is the sensitivity of the PCF7936AS/3851,122 in read and write mode?
The device has excellent sensitivity in read and write mode, with a magnetic field strength of 35 µT. - How long does the EEPROM data retain its value?
The EEPROM data retains its value for up to 20 years. - Is the PCF7936AS/3851,122 RoHS compliant?
No, the PCF7936AS/3851,122 is not RoHS compliant as it contains lead. - What is the package type of the PCF7936AS/3851,122?
The device is packaged in a leadless stick-shaped plastic package. - What are the primary applications of the PCF7936AS/3851,122?
The primary applications include modern vehicle immobilizer systems and other secure authentication and data storage needs.
