73S8009CN-32IM/F Maxim Integrated Products, 73S8009CN-32IM/F Datasheet - Page 18

• Manufacturer Part Number: 73S8009CN-32IM/F
• Description: IC PWR MGMT/SMART CARD INT 32QFN
• Manufacturer: Maxim Integrated Products

Specifications of 73S8009CN-32IM/F

• Applications: Smart Card Reader, Writer
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 32-VFQFN Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

73S8009CN Data Sheet
3.4
Five separate digital inputs and two outputs allow direct control of the card interface from the host:






Interrupt output to the host: When the card is not activated, the OFF pin informs the host about the card
presence only (Low = No card in the reader, high = card inserted). When CMDVCC (#/% signals) is/are
set low (card activation sequence requested from the host), low level on OFF means a fault has been
detected (e.g. card removal during card session, or voltage fault, or thermal / over-current fault) that
automatically initiates a deactivation sequence. The smart card pass through signals are enabled when
the RDY conditions are met.
3.5
The 73S8009CN smart card interface IC incorporates an LDO voltage regulator for the card power
supply, V
input sequence of CMDVCC# and CMDVCC%. This regulator is able to provide either 1.8V, 3V or 5V
card voltage sourced from the V
supply (except for the ON/OFF circuitry which is powered from V
value of the voltage V
supervisor, overcurrent condition, or card removal event. The voltage regulator can provide a card
current of 65mA in compliance with EMV 4.1 for 3-V and 5-V cards. The signals CMDVCC# and
CMDVCC% control the turn-on, output voltage value, and turn-off of V
low, V
V
to be 5V) and at a much later time (greater than 2µs, typically), CMDVCC# is asserted low, it will be
ignored (and vice versa.)
At the assertion (low) of either or both CMDVCC (#/% signals), V
V
high. Approximately 510µs after the fall of CMDVCC (#/%), the circuit will check the see if V
above the required minimum value (indicated by RDY=1) and if not, will begin an emergency deactivation
sequence. During the 510µs time, card removal, or de-assertion of CMDVCC (#/%) shall also initiate an
emergency deactivation sequence. The circuit provides over-current protection and limits Icc to 150mA,
maximum for self-protection. When an over-current condition is sensed, the circuit will invoke a de-
activation sequence.
18
CC
CC
Pin CS: Chip select control.
Pin CMDVCC# and/or CMDVCC%: When low, starts an activation sequence.
Pin RSTIN: controls the card RST signal.
Pin SC/USB: Routes AUXx signals to AUXxUC or USB Dx pins and provides proper tri-stating
functionality.
Pin RDY: Indicates when smart card power supply is stable and ready.
Pin OFF: Indicator of card presence and any card fault conditions.
will ramp to 1.8V. These signals are edge triggered. If CMDVCC% is asserted low (to command V
rises to an acceptable value, and stays above that value for approximately 20µs, RDY will be set
CC
System Controller Interface
Card Power Supply and Voltage Supervision
will ramp to the selected value or if both signals are asserted low (within 400ns of each other),
CC
(V
P
to V
CC
CC
conversion uses an internal LDO). The voltage output is controlled by the digital
. A card deactivation sequence is forced upon fault detected by voltage
P
power supply. Internal digital circuitry is also powered by the V
CC
PC
). A voltage supervisor checks the
will rise to the requested value. When
CC
. When either signal is asserted
DS_8009CN_026
CC
is at or
P
Rev. 1.4
power
CC