器件名称: U2270B-MFPY
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……
