73S8023C-IM/F Maxim Integrated Products, 73S8023C-IM/F Datasheet - Page 15

• Manufacturer Part Number: 73S8023C-IM/F
• Description: IC SMART CARD INTERFACE 32-QFN
• Manufacturer: Maxim Integrated Products
• Type: Smart Card Interfacer

Specifications of 73S8023C-IM/F

• Controller Type: Smart Card Interface
• Interface: *
• Voltage - Supply: 2.7 V ~ 3.6 V
• Current - Supply: 4.9mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS_8023C_019
10 I/O Circuitry and Timing
The I/O, AUX1, and AUX2 pins are in the low state after power-on reset and they are in the high state
when the activation sequencer turns on the I/O reception state. See
Deactivation
The state of the I/OUC, AUX1UC, and AUX2UC pins is high after power-on reset. Within a card session
and when the I/O reception state is on, the first I/O line on which a falling edge is detected becomes the
input I/O line and the other becomes the output I/O line. When the input I/O line rising edge is detected,
both I/O lines return to their neutral state.
Figure 9
The delay between the I/O signals is shown in
Rev. 1.5
CMDVCC
PRES
VCC
OFF
In order to be compliant to the NDS specifications, a 27 pF capacitor must be added between pins
I/O (C7) and GND (C5) at the smart card connector.
shows the state diagram of how the I/O and I/OUC lines are managed to become input or output.
for more details on when the I/O reception is on.
outside card session
Figure 8: Timing Diagram – Management of the Interrupt Line OFF
Figure
within card session
10.
card extracted
OFF is low by
Section 8 Activation and
73S8023C Data Sheet
within card
session
OFF is low by
any fault
15