Datasheet
DS_8009C_025 73S8009C Data Sheet
Rev. 1.5 17
CLKIN_from_uC
C1
0.47µF,
OFF_ACK_from_uC
OFF_interrupt_to_uC
CLK track should be routed
far from RST, I/O, C4 and C8
NOTES:
1) VBUS = 4.5V to 5.5V DC.
2) VPC = 2.7V to 6.5V DC (should only be used when V
BAT
and
V
BUS
are unused)
3) VBAT = 4.0V to 6.5V DC.
4) Internal pull-up allows it to be left open if unused.
I/OUC_to/from_uC
Card detection
switch is
normally closed
VDD
AUX1UC_to/from_uC
AUX2UC_to/from_uC
RSTIN_from_uC
Low ESR (<100 M? )
should be placed near the
SC connecter contact
CS_from_uC
CMDVCC%_from_uC
R2
20K
Smart Card Connector
1
2
3
4
5
6
7
8
9
10
VCC
RST
CLK
C4
GND
VPP
I/O
C8
SW-1
SW-2
See
NOTE 4
CMDVCC#_from_uC
RDY_status_to_uC
C3
See NOTE 2
OFF_REQ_to_uC
0
C2
4.7µF
C4
27pF
C5
27pF
See
NOTE 5
5) Resistor footpring is included in case some filtering is needed on CLK
VP
C
12
10
11
13
15
16
14
32 QFN73S80009C
1
2
3
4
5
6
7
8
CS
TEST1
GND
VPC
CLKIN
AUX2
RDY
PRES
PRES
I/O
AUX1
VBUS
CLK
RST
VCC
TEST2
CMDVCC%
RSTIN
VDD
GND
OFF
AUX2UC
AUX1UC
I/OUC
CMDVCC#
VP
OFF_ACK
OFF_REQ
ON/OFF
VBAT
LIN
GND
17
18
19
20
21
23
24
22
9
28
27
25
26
32
31
29
30
VBAT
10µF
10µH
VDD
VBUS
Pushbutton Switch
SW1
See NOTE 3
See NOTE 1
VDD_supply_to_uC
See
NOTE 6
See
NOTE 6
6) Capacitors C4 and C5 are provisional and their footprints should be added
for added noise rejection if necessary.
7) Inductor must be rated for 400 mA maximum peak current.
See NOTE 7
8) V
DD
- 3.3V, +/- 0.3V, 40mA max. Requires min two 0.1µF caps to gnd)
See NOTE 8
C6
0.1µF
Figure 3: Typical 73S8009C Application Schematic