73S8024C Maxim, 73S8024C Datasheet - Page 4

• Manufacturer Part Number: 73S8024C
• Description: The 73S8024C is a single smart card interface IC, compliant to the electrical requirements of ISO 7816-3 and EMV 4
• Manufacturer: Maxim

73S8024C Data Sheet
1 Pin Description
1.1 Card Interface
1.2 Miscellaneous Inputs and Outputs
1.3 Power supply and ground
4
Name
XTALIN
XTALOUT
VDDF_ADJ
NC
Name
VDD
GND
GND
LIN
Name
IO
AUX1
AUX2
RST
CLK
PRES
PRES
VCC
GND
6, 21
(SO)
(SO)
(SO)
Pin
Pin
Pin
11
13
12
16
15
10
17
14
22
24
25
18
9
4
5
7
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 the sequencer, output of DC-DC
converter. Requires an external filter capacitor to the card GND.
Card ground.
Description
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 an external clock input.
V
value (that controls deactivation of the card). Must be left open if unused.
Non-connected pin.
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 5 to V
inductor close to pin 5.
DD
fault threshold adjustment input: this pin can be used to adjust the V
DD
. Keep the
DS_8024C_023
CC.
CC.
CC.
DDF
Rev. 1.3