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AN1978 Datasheet(PDF) 7 Page - STMicroelectronics

No. de pieza AN1978
Descripción Electrónicos  SMART CARD INTERFACE
PDF  14 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1978 Datasheet(HTML) 7 Page - STMicroelectronics

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AN1978 - APPLICATION NOTE
7/14
Figure 8: Vcc loaded with a 65mA pulsed current.
Figure 9: Step-up and Vcc capacitors placement.
CH1: Vcc voltage; offset=5V;
BandWidth=250MHz.
CH4: Vcc output current into
GND.
Conditions:
VDD=3.3V;
VDDP=4.75V;
5/3V=H.
The Vcc voltage is between
4.6V and 5.3V even if a 65mA
sink pulsed current is forced.
V
DDP wire
VUP wire
PGND
S2
S1
V
DDP
V
UP
Card
connector
Vcc
C1 (Vcc)
Vcc
C1 (Vcc)
C2 (RST)
C3 (CLK)
C4 (AUX1)
C5(GND)
C6 (N.C.)
C7 (I/O)
C8 (AUX2)
Card
connector
C11:
100nF filter
capacitor
PRES and PRES
V
DDP wire
VUP wire
PGND
S2
S1
V
DDP
V
UP
Card
connector
Vcc
C1 (Vcc)
Vcc
C1 (Vcc)
C2 (RST)
C3 (CLK)
C4 (AUX1)
C5(GND)
C6 (N.C.)
C7 (I/O)
C8 (AUX2)
Card
connector
C11:
100nF filter
capacitor
PRES and PRES
V
DDP wire
VUP wire
PGND
S2
S1
V
DDP
V
UP
Card
connector
Vcc
C1 (Vcc)
Vcc
C1 (Vcc)
C2 (RST)
C3 (CLK)
C4 (AUX1)
C5(GND)
C6 (N.C.)
C7 (I/O)
C8 (AUX2)
Card
connector
C11:
100nF filter
capacitor
PRES and PRES



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