參數(shù)資料
型號： TCF6000D
廠商： MOTOROLA INC
元件分類： 模擬信號調(diào)理
英文描述： PERIPHERAL CLAMPING ARRAY
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO8
封裝： PLASTIC, SOP-8
文件頁數(shù)： 3/6頁
文件大小： 93K
代理商： TCF6000D
TCF6000
3
MOTOROLA ANALOG IC DEVICE DATA
–0.3 V
+10 mA
IIK
0 V
–10 mA
Low
Impedance
High
Low
Impedance
Impedance
VCC+
0.75 V Typ
Vin
VCC
Figure 3. Clamping Characteristics
APPLICATIONS INFORMATION
Figure 4 depicts a typical application in a microcomputer
based automotive ignition system.
The TCF6000 is being used not only to protect the
system’s normal inputs but also the (bidirectional) serial
diagnostics port.
The value of the input resistors, Rin, is determined by the
clamping current and the anticipated value of the spikes.
Thus:
V
IIK
Rin =
where:
So, taking,
gives,
V
IIK
V
IIK
Rin
= Peak Volts (V)
= Clamping current (A)
= 300 V typically (SAE J1211)
= 10 mA (recommended)
= 30 k
Resistors of this value will not usually cause any problems
in MOS systems, but their presence needs to be taken into
account by the designer. Their effect will normally need to be
compensated for Bipolar systems.
Figure 4. Typical Automotive Application
Gnd
Gnd
VCC
Coil Drive
Coil Feedback
VCC
INT1
D1
D0
D2
B0
D6
B1
B2
VSS
Gnd
Serial Diagnostics
Ignition Module
Car
6X
Rin
3X
Cin
Gnd
Vbat
Vbat
RHall
Engine
Temperature
Hall
Effect
Pick Up
Pressure
Sensor
Battery
Volts
Gnd
MC6805S2
T
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