s8024rn Maxim Integrated Products, Inc., s8024rn Datasheet - Page 15

• Manufacturer Part Number: s8024rn
• Description: 73s8024rn Low Cost Smart Card Interface
• Manufacturer: Maxim Integrated Products, Inc.

DS_8024RN_020
11 Typical Application Schematic
Rev. 1.9
NOTES:
1) VDD = 2.7V to 5.5V DC.
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.
5) Optional. Can be left open.
6)Internal pull-up allows it to be left open if unused.
7) R1 and R3 are external resistors that adjust the VDD
Y1, C2 and C3 must be removed if external clock is used.
fault voltage. Can be left open.
See NOTE 2
CLKDIV1_from_uC
CLKDIV2_from_uC
5V/3V_select_from_uC
CLKSTOP_from_uC
CLKLVL_from_uC
VPC
100nF
C4
See NOTE 5
VDD
C5
10uF
R2
20K
Figure 8: 73S8024RN – Typical Application Schematic
VDD
Card detection
switch is
normally closed
10
11
12
13
14
1
2
3
4
5
6
7
8
9
See NOTE 6
73S8024RN
CLKDIV1
CLKDIV2
5V3V_
GND
NC
VPC
CLKSTOP
CLKLVL
PRESB
PRES
I/O
AUX2
AUX1
GND
Smart Card Connector
VDDF_ADJ
CMDVCC_
XTALOUT
AUX2UC
AUX1UC
XTALIN
I/OUC
RSTIN
SO28
OFF_
GND
VDD
VCC
RST
CLK
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CLK track should be routed
far from RST, I/O, C4 and
C8.
NDS & ISO7816=1uF, EMV=3.3uF
C1
should be placed near the SC
Low ESR (<100mohms) C1
connecter contact
See note 7
VDD
Rext1
R3
Rext2
R1
AUX2UC_to/from_uC
AUX1UC_to.from_uC
I/OUC_to/from_uC
See NOTE 1
100nF
C6
VDD
OFF_interrupt_to_uC
RSTIN_from_uC
CMDVCC_from_uC
- OR -
External_clock_from uC
See NOTE 5
CRYSTAL
Y1
See NOTE 4
73S8024RN Data Sheet
See NOTE 3
C2
C3
22pF
22pF
15