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U2270B の電気的特性と機能

U2270BのメーカーはTEMIC Semiconductorsです、この部品の機能は「Read / Write Base Station IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 U2270B
部品説明 Read / Write Base Station IC
メーカ TEMIC Semiconductors
ロゴ TEMIC Semiconductors ロゴ 




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U2270B Datasheet, U2270B PDF,ピン配置, 機能
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)

1 Page





U2270B pdf, ピン配列
Functional Description
Power Supply (PS)
DVS
VEXT
V S V Batt
internal supply
U2270B
Standby
9 V 25 kW
COILx
6 V 6 V 18 V
PS
12 kW
DRV
DGND
Figure 4. Equivalent circuit of power supply and antenna driver
11413
The U2270 can be operated with one external supply
voltage or with two externally-stabilized supply voltages
for an extended driver output voltage or from the 12-V
battery voltage of a vehicle. The 12-V supply capability
is achieved via the on-chip power supply (see figure 4).
The power supply provides two different output voltages,
VS and VEXT.
VS is the internal power supply voltage except for the
driver circuit. Pin VS is used to connect a block capacitor.
VS can be switched off by the pin STANDBY. In standby
mode, the chip’s power consumption is very low. VEXT is
the supply voltage of the antenna’s pre-driver. This
voltage can also be used to operate external circuits, i.e.,
a microcontroller. In conjunction with an external NPN
transistor, it also establishes the supply voltage of the
antenna coil driver, DVS.
TELEFUNKEN Semiconductors
Rev. A3, 13-Dec-96
3 (13)


3Pages


U2270B 電子部品, 半導体
U2270B
Schmitt Trigger
The signal is processed by a Schmitt trigger to suppress
possible noise and to make the signal mC compatible. The
hysteresis level is 100 mV symmetrically to the dc opera-
tion point. The open-collector output is enabled by a low
level at OE (Pin 3).
7 mA
30 mA
OE 12602
Figure 11. Equivalent circuit of Pin OE
Driver (DRV)
The driver supplies the antenna coil with the appropriate
energy. The circuit consists of two independant output
stages. These output stages can be operated in two
different modes. In common mode, the outputs of the
stages are in phase. In this mode, the outputs can be
interconnected, to achieve a high current output
capability. Using the differential mode, the output
voltages are in anti-phase. Thus, the antenna coil is driven
with a higher voltage. For a specific magnetic field, the
antenna coil impedance is higher for the differential
mode. As a higher coil impedance results in a better
system sensitivity, the differential mode should be
preferred.
The CFE input is intended to be used for writing data into
a read/write or a crypto transponder. This is achieved by
interrupting the RF field with short gaps. The TEMIC
write method is described in the data sheets of TK5550
and TK5560. The various functions are controlled by the
inputs MS and CFE, refer to function table. The
equivalent circuit of the driver is shown in figure 4.
MS 12603
Figure 12. Equivalent circuit of Pin MS
30 mA
CFE
12604
Figure 13. Equivalent circuit of Pin CFE
6 (13)
TELEFUNKEN Semiconductors
Rev. A3, 13-Dec-96

6 Page



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部品番号部品説明メーカ
U2270B

Read / Write Base Station IC

TEMIC Semiconductors
TEMIC Semiconductors


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