器件名称:
U2270B-MFPG3Y
功能描述:
Read/Write Base Station
文件大小:
319.15KB 共18页
简 介:
Features Carrier Frequency fosc 100 kHz to 150 kHz Typical Data Rate up to 5 Kbaud at 125 kHz Suitable for Manchester and Bi-phase Modulation Power Supply from the Car Battery or from 5V Regulated Voltage Optimized for Car Immobilizer Applications Tuning Capability Microcontroller-compatible Interface Low Power Consumption in Standby Mode Power-supply Output for Microcontroller Applications Car Immobilizers Animal Identification Access Control Process Control Read/Write Base Station U2270B 1. Description The U2270B is an IC for IDIC read/write base stations in contactless identification and immobilizer systems. The IC incorporates the energy-transfer circuit to supply the transponder. It consists of an on-chip power supply, an oscillator, and a coil driver optimized for automotive-specific distances. It also includes all signal-processing circuits which are necessary to transform the small input signal into a microcontroller-compatible signal. 4684E–RFID–02/08 Figure 1-1. System Block Diagram Transponder/TAG Read/write base station Osc Transponder IC RF field typ. 125 kHz U2270B NF read channel Carrier enable MCU Data output Unlock System Figure 1-2. Block Diagram DVS VEXT VS VBatt Standby Power supply COIL1 =1 MS CFE COIL2 Driver DGND & Oscillator Frequency adjustment RF Amplifier Input Lowpass filter Schmitt trigger Output & HIPASS GND OE 2 U2270B 4684E–RFID–02/08 U2270B 2. Pin Configuration Figure 2-1. Pinning GND OUTPUT OE INPUT M……