73s8009r-il Maxim Integrated Products, Inc., 73s8009r-il Datasheet - Page 7

• Manufacturer Part Number: 73s8009r-il
• Description: Low Cost Versatile Smart Card Interface
• Manufacturer: Maxim Integrated Products, Inc.

DS_8009R_056
Rev. 1.3
Pin
Name
I/OUC
AUX1UC
AUX2UC
CMDVCC%
CMDVCC#
RSTIN
RDY
PWRDN
(SO28)
Pin
10
12
13
5
6
7
8
9
(QFN20)
Pin
NA
NA
1
2
3
4
6
7
Type
I/O
I/O
I/O
O
I
I
I
I
System controller data I/O to/from the card. Includes a pull-
up resistor to V
System controller auxiliary data I/O to/from the card.
Includes a pull-up resistor to V
System controller auxiliary data I/O to/from the card.
Includes a pull-up resistor to V
Logic low on one or both of these pins will cause the LDO to
ramp the Vcc supply to the smart card and smart card
interface to the value described in the following table:
Refer to for additional information on the CMDVCC% and
CMDVCC# operation.
Reset Input. This signal is the reset command to the card.
Signal to controller indicating the 73S8009R is ready
because V
and/or CMDVCC# is asserted low. A 20 KΩ pull-up resistor
to V
PWRDN and CS=0 modes.
PWRDN=1 puts the circuit into low-power mode with all
analog functions disabled. The circuit will recover from the
PWRDN state in the same manner as recovery from a POR
event, taking approximately 1 ms. PWRDN assertion when
either CMDVCC% or CMDVCC# is low has no effect and is
ignored. There is no pull-up or pull-down provided on this pin.
DD
CMDVCC%
is provided internally. The pull-up is disabled in
CC
0
0
1
1
is above the required value after CMDVCC%
DD.
CMDVCC#
Description
0
1
0
1
DD.
DD.
V
CC
73S8009R Data Sheet
Output Voltage
LDO off
1.8 V
5.0 V
3.0 V
7