DataSheet.jp

U6268B の電気的特性と機能

U6268BのメーカーはTEMIC Semiconductorsです、この部品の機能は「Side-Airbag Sensor Dual Interface」です。


製品の詳細 ( Datasheet PDF )

部品番号 U6268B
部品説明 Side-Airbag Sensor Dual Interface
メーカ TEMIC Semiconductors
ロゴ TEMIC Semiconductors ロゴ 




このページの下部にプレビューとU6268Bダウンロード(pdfファイル)リンクがあります。

Total 12 pages

No Preview Available !

U6268B Datasheet, U6268B PDF,ピン配置, 機能
Side-Airbag Sensor Dual Interface
U6268B
Description
The U6268B is an interface IC for remote automotive
sensors. It links the crash sensors in the driver- and
passenger door with the main airbag unit in the
dashboard. Two identical channels supply the external
sensors and receive digital information from them via one
active wire each. The interface supplies the external
sensors with a pre-regulated smoothed voltage, the
external units transmit the digital information back to the
interface by current modulation.
As the device is for safety critical applications, highest
data transmission security is mandatory. With high
immunity against cross-coupling between the two
channels, the U6228B is tailored for the harsh automotive
environment.
Features
D Two identical interface channels
D Provides a pre-regulated smoothed voltage and a
supply current up to 50 mA for the sensors
D Receives data from the sensors by current modulation
with a transmission rate of 60 kBaud (transmission
bandwidth 500 kHz)
D Current modulation provides high noise immunity for
data transfer
D TTL-compatible input activate the sensor
D Data output can be directly connected to a micro-
controller input
v vD Operation supply voltage range 5.7 V VS 40 V
D ESD protection according to MIL-STD-883C test
method 3015.7
D High-level EMI protection
Benefits
D Voltage supply and data transmission with one active
wire over long distances
Ordering Information
Extended Type Number
U6268B
Package
SO16
Remarks
Block Diagram
Data
Channel 1
Enable
Voltage
comparator
µC Channel 1
Channel 2
Enable
Channel 2
Data
Voltage
comparator
I/U converter
Smoothed voltage
regulator
Temperature Short circuit
monitor
detection
Smoothed voltage
regulator
I/U converter
Figure 1. Block diagram
Channel 1
power
supply
Data
trans–
mission
Crash
sensor
Channel 2
power
supply
Data
trans–
mission
Crash
sensor
13839
TELEFUNKEN Semiconductors
Rev. A1, 21-May-97
Preliminary Information
1 (12)

1 Page





U6268B pdf, ピン配列
U6268B
35
30
25
22.4
21.4
20
Vout max
Vout min
15
9.4 10
8.2
7.7
5.4 5
4.9
13322
0
0
5 10 15
5.7 8.5 11.3 12.0
20
VS ( V )
25 30 35
28.6 32.6
40
Figure 4. Output voltage with tolerances vs. supply voltage
The data transmission from the external unit to the
interface IC is carried out on the same line by varying the
current level. The quiescent current consumption of the
external unit is about 5 to 15 mA. This current level is
interpreted as logic high level at CLL-pin. The external
unit can switch on an additional current of 30 mA,
interpreted by the interface as logic low. The current
changes within approximately 1 ms, sufficient for a
transmission rate of about 60 kBaud, requiring a
transmission bandwidth of about 500 kHz for the current-
monitoring subcircuit and the OCM output. For a good
current transmission behaviour, the dynamic resistance of
WOUTx may not exceed 12 inside the bandwidth range
W(total of 15 for OUTx and RETURN).
The OUTx- voltage can be switched off by
ENABLEx = LOW to reset the external unit and to
reduce power dissipation during fault conditions.
The OUT pins are overtemperature- and short-circuit
protected. A reverse polarity diode at Pin VS (Pin 4) en-
sures that no current is fed back to the VBatt-system in the
case of a short between OUTx and VBatt. A minimum ca-
pacity of 33 nF is required at the pins OUTx .
ENABLE1, ENABLE2
D Low or open circuit applied to ENABLEx switches
the related OUTx and RETURNx off (high imped-
ance). A sink current at Pin OUTx discharges the
capacitive load.
D High applied to ENABLEx switches the related
OUTx and RETURNx on to supply the external unit.
OCM1, OCM2
The output current of OUTx is monitored with a transmis-
sion factor of 0.1 to the OCMx. With a resistor from OCM
Wto GND, the current is converted to a voltage. The electri-
cal characteristics are specified by ROCM = 750 . The
CLL-current threshold, the OUT-current limitation and
W Wthe OUT-current detection can be changed by varying
ROCM in a range from 500 to 1 k .
The current monitoring enables to detect overcurrent
conditions at OUTx (short circuit to GND or RETURNx)
and to detect low current conditions at OUTx (short cir-
cuit to VBatt or open load).
The internal pull-down current at the OUTx creates no
OCMx-current. During enable, the minimum voltage at
OCMx is the saturation voltage of an internal NPN-tran-
sistor with typically 0.1 V. The maximum voltage at
OCM is limited by an internal clamping diode to 5.3 V.
CLL1, CLL2
ENABLEx is a microcontroller-compatible input which The current at Pin OUTx is logical evaluated and ready
switches the related output on or off.
to use for a microcontroller input. With this stage, the
TELEFUNKEN Semiconductors
Rev. A1, 21-May-97
Preliminary Information
3 (12)


3Pages


U6268B 電子部品, 半導体
U6268B
Parameters
Test Conditions / Pins
Voltage at SC
VS = 5.7 V
Voltage at SC
VS = 12.5 V
Maximal voltage at SC VS = 40 V
SC-discharge current
v vVoltage SC = VSC – 3 V
5.7 V VS 40 V
SC-charge current
v vVoltage SC = VSC – 3 V
5.7 V VS 40 V
Function OUT1 and OUT2 (see figure 4)
Voltage difference,
VS to VOUTx
Output voltage OUTx
IOUTx = 5 to 50 mA
v v5.7 V VS 8.5 V
v v12 V VS 25 V
v v8.5 V VS 11.3 V
Maximal voltage at
OUTx
Current mirror ratio,
IOCMx/IOUTx
VS = 40 V
vVS 40 V, IOUTx = 5 to 15 mA
vVS 25 V, IOUTx =15 to 50mA
vVS 40 V, IOUTx =15 to 50mA
Linearity of mirror ratio
IOCMx/IOUTx
Dynamic resistance
OUTx
Dynamic resistance
OUTx + RETURNx
OUTx current limitation
(OUTx short to GND)
Overcurrent detection
level general
Overcurrent detection
level
vVS 40 V IOUT = 15 to 50 mA
vVS 40 V IOUT = 15 to 50 mA
vVS 18 V
vVS 40 V
Tj < 125°C
wTj 125°C
Always valid: current limitation is
higher than overcurrent detection
Maximum OUTx current
(OUTx short to GND)
Leakage current at
disabled OUTx
Leakage voltage at
disabled OUTx
Internal pull-down
current
VS = 14 V, OCMx shorted to GND
vOUT short to GND VS 25 V
vOUT short to GND VS 38.5 V
vOUT open VS 38.5 V
vVS 18 V
vVS 40 V
Supply rejection-ratio
VSC = 7.6 V
Supply rejection-ratio
mVariation of VS 8.4 to 40 V
in 10 s
Minimum capacity at
OUTx for phase margin
Delay time with
Switching on ENABLE = 1 to
Cout = 47 nF
90% VOUT reached
Switching off ENABLE = 0 to
10% VOUT reached
Function OCM1, OCM2
Symbol
VSC
VSC
VSCmax
ISC_dis
ISC_ch
Vdiff_low
Vdiff_high
VOUT_med
VOUT_max
IOUT_ratio
Ratio_lin
ROUT
RDyn
IOUT_lim
IOUT_det
IOUT_det
IOUT_max
IOUT_leak
VOUT_leak
IOUT_sink
Vrej_mV
Vrej_dB
COUT_min
Enable_on
Enable_off
Min. Typ. Max.
5.1 5.3
9 9.4
30
33 82
–58 –20
0.3
2.6
7.7
25
0.09
0.10
0.097
–5
2
4
–80
–105
–70
–60
–140
–0.02
–12
1.8
2.5
51.9
33
3
30
0.8
3.6
30
0.12
0.11
0.11
5
12
15
–60
–60
–51
–51
–85
4.3
4
4.5
80
30
100
Unit
V
V
V
mA
mA
V
V
V
V
%
W
W
mA
mA
mA
mA
mA
mA
mA
V
mA
mA
mV
dB
nF
ms
ms
6 (12)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 21-May-97

6 Page



ページ 合計 : 12 ページ
 
PDF
ダウンロード
[ U6268B データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
U6268B

Side-Airbag Sensor Dual Interface

TEMIC Semiconductors
TEMIC Semiconductors
U6268B

Side-airbag Sensor Dual Interface

ATMEL Corporation
ATMEL Corporation


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap