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TP-UART-IC 데이터시트(PDF) 4 Page - Siemens Semiconductor Group

부품명 TP-UART-IC
상세설명  TP-UART-IC
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제조업체  SIEMENS [Siemens Semiconductor Group]
홈페이지  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

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TP-UART-IC
The reproduction, transmission or use of this document or it‘s contents is not permitted without express written authority. All
rights, including right created by patent grant or registration of a utility model or design, are reserved. Technical changes
reserved.
25.15.10.41.33a
25.10.01
page
4
1.2
DC and AC Characteristics
The following parameters are valid in the ambient temperature range
ϑ
amb = -25
οC to 85 οC
and for bus voltage VB+ = 20 to 33 V if it is not otherwise declared. When the bus voltage is
lower than 20 V and no RESET is active then the normal functionality must be fulfilled, but
the parameters may be outside the limits.
1.2.1 Bus Pins VB+ and VB- (Pins 10, 11)
Via these pins the ASIC is connected to the bus line. VB- represents the reference potential.
Symbol
Parameter
Min
Max
Unit Note
VVB+
positive line voltage
-0.5
45
V
1)
Inormal
current consumption in analog mode (without clock)
1
mA
Inormal
current consumption in normal mode (with clock)
1.6
mA
4,9152 MHz
1) during surge impulse is allowed and guaranteed by ext. Elements: -20 V for 2 µs and 65 V for 150 µs
1.2.2 Buffer Voltage VSP (Pin 9)
The ASIC delivers a supply voltage of 5 volts to external loads. In order to prevent a rapid
change of bus current as a result of a rapid change of the load an external capacitor at the
pin VSP is used for energy storage. The static voltage is adjusted to app. 8,8 V (8,2 ...9,2)
by an internal regulator.
Symbol
Parameter
Min
Max
Unit
Note
VVSP
Energy buffer voltage
5.76
13
V
1)
CVSP
External storage capacitor
80
µF
2)
1) due to the limited current changing rate an overshoot of VVSP after load change may occur
2) recommended 100
µF; must be larger than the capacitor at VCC
1.2.3 Current Controlling Pin CSA (Pin 8)
An external capacitor at this pin prevents a quick change of ASIC current in case of quick
changing bus voltage VB+ or load current IVCC. The ASIC current changes with a rate of
max. 0,5 mA/ms (CCSA = 47 nF).
Symbol
Parameter
Min
Max
Unit
Note
CCR
max. current changing rate (ext. Start, CCSA = 47 nF)
0.2
0.5
mA/ms
1)
1)tolerance of capacitor CCSA = 47nF/50V +/- 5%


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