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U2270B Datasheet

Read / Write Base Station IC

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Read / Write Base Station IC
U2270B
Description
IC for IDIC® *) read-write base stations
The U2270B is a bipolar integrated circuit for read-write
base stations in contactless identification and immo-
bilizer 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 form the small input signal
into a microcontroller-compatible signal.
The U2270B is well suitable to perform read operations
with e5530-GT and TK5530-PP transponders and also
performs read-write operations with TK5550-PP and
TK5560-PP transponders.
Features
D Carrier frequency fosc 100 KHz – 150 KHz
D Typical data rate up to 5 Kbaud at 125 KHz
D Suitable for Manchester and Bi-phase modulation
D Power supply from the car battery or from
5-V regulated voltage
D Optimized for car immobilizer applications
D Tuning capability
D Microcontroller-compatible interface
D Low power consumption in standby mode
D Power supply output for microcontroller
Applications
D Car immobilizers
D Animal identification
D Access control
D Process control
D Further industrial applications
Case: SO16 U2270B-FP
Transponder / TAG
Read / write base station
Transp.
IC
e5530
e5550
e5560
RF– Field
typ. 125 kHz
Osc
U2270B
NF read channel
Carrier
enable
Data
output
MCU
Unlock
System
TK5530-PP
e5530-GT
TK5550-PP
TK5560-PP
Figure 1.
*) IDIC® stands for IDentification Integrated Circuit and is a trademark of TEMIC.
9300
TELEFUNKEN Semiconductors
Rev. A3, 13-Dec-96
1 (13)
TEMIC Semiconductors
TEMIC Semiconductors



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