DS_8024RN_020
73S8024RN Data Sheet
11 Typical Application Schematic
AUX2UC_to/from_uC
AUX1UC_to.from_uC
I/OUC_to/from_uC
See NOTE
5
VDD
See NOTE
6
CLKDIV1_from_uC
CLKDIV2_from_uC
5V/3V_select_from_uC
See NOTE
3
External_clock_from uC
VDD
-
OR -
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
R3
Rext2
CLKDIV1
CLKDIV2
5V3V_
GND
NC
VPC
CLKSTOP
CLKLVL
PRESB
PRES
I/O
AUX2UC
AUX1UC
I/OUC
XTALOUT
XTALIN
OFF_
GND
VDD
RSTIN
CMDVCC_
VDDF_ADJ
VCC
C4
C5
C2
VPC
100nF
10uF
22pF
See NOTE
2
Y1
C3
VDD
See NOTE
C6
1
22pF
CRYSTAL
CLKSTOP_from_uC
CLKLVL_from_uC
100nF
See NOTE
4
AUX2
AUX1
GND
R1
Rext1
RST
CLK
See NOTE
5
See note
7
73S8024RN
SO28
OFF_interrupt_to_uC
RSTIN_from_uC
CMDVCC_from_uC
VDD
R2
NOTES:
1) VDD = 2.7V to 5.5V DC.
NDS & ISO7816=1uF, EMV=3.3uF
Low ESR (<100mohms) C1
Card detection
switch is
normally closed
20K
C1
should be placed near the SC
connecter contact
2) VPC = 4.75V(EMV, ISO)/4.85(NDS) to 5.5V DC
3) Required if external clock from uP is used.
4) Required if crystal is used.
CLK track should be routed
far from RST, I/O, C4 and
Y1, C2 and C3 must be removed if external clock is used.
5) Optional. Can be left open.
C8.
6)Internal pull-up allows it to be left open if unused.
7) R1 and R3 are external resistors that adjust the VDD
fault voltage. Can be left open.
Smart Card Connector
Figure 8: 73S8024RN – Typical Application Schematic
Rev. 1.8
15
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
