73S8023C Maxim, 73S8023C Datasheet - Page 5

• Manufacturer Part Number: 73S8023C
• Description: The 73S8023C is a single smart card interface IC, compliant to the electrical requirements of ISO 7816-3, EMV 4
• Manufacturer: Maxim

DS_8023C_019
1 Pin Description
1.1 Card Interface
1.2 Miscellaneous Inputs and Outputs
1.3 Power Supply and Ground
Rev. 1.5
Name
I/O
AUX1
AUX2
RST
CLK
PRES
PRES
VCC
GND
Name
XTALIN
XTALOUT
VDDF_ADJ
NC
Name
VDD
GND
GND
LIN
3, 20
Pin
Pin
Pin
11
10
14
13
15
12
23
24
17
21
9
7
6
4
1
2
Description
Card I/O: Data signal to/from card. Includes a pull-up resistor to V
AUX1: Auxiliary data signal to/from card. Includes a pull-up resistor to V
AUX2: Auxiliary data signal to/from card. Includes a pull-up resistor to V
Card reset: Provides reset (RST) signal to card.
Card clock: Provides clock (CLK) signal to card. The rate of this clock is
determined by crystal oscillator frequency and CLKDIV selections.
Card Presence switch: Active high indicates card is present. Includes a
pull-down current source.
Card Presence switch: Active low indicates card is present. Includes a pull-up
current source.
Card power supply: Logically controlled by sequencer, output of DC-DC
converter. Requires an external filter capacitor to the card GND.
Card ground.
Crystal oscillator input: can either be connected to crystal or driven as a
source for the card clock.
Crystal oscillator output: connected to crystal. Left open if XTALIN is being
used as external clock input.
V
value (that controls deactivation of the card). Must be left open if unused.
Non-connected pin. Must be left open.
Description
System controller interface supply voltage: Supply voltage for internal power
supply and DC-DC converter power supply source.
DC-DC converter ground.
Digital ground.
External inductor. Connect external inductor from pin 2 to V
inductor close to pin 2.
Description
DD
fault threshold adjustment input: this pin can be used to adjust V
73S8023C Data Sheet
DD
. Keep the
CC.
DDF
CC.
CC.
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