73S8009C-20IM 查看數據表（PDF） - Teridian Semiconductor Corporation
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73S8009C-20IM
Teridian Semiconductor Corporation
73S8009C-20IM Datasheet PDF : 33 Pages
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DS_8009C_025
73S8009C Data Sheet
Pin
Name
CMDVCC%
CMDVCC#
RSTIN
RDY
ON_OFF
OFF_REQ
OFF_ACK
Pin
Pin
(QFN32) (QFN20)
Type
Equivalent
Circuit
Description
4
3
I
Figure 19 Logic low on one or both of these pins will
5
4
I
cause the LDO to ramp the Vcc supply to the
smart card and smart card interface to the
value described in the following table.
CMDVCC% CMDVCC# Vcc Output Voltage
0
0
1.8 V
0
1
5.0 V
1
0
3.0 V
1
1
LDO Off
Note: See the description of the Card Power
Supply for more detail on the operation of
CMDVCC% and CMDVCC#.
6
5
I
Figure 19 Reset Input: This signal is the reset command
to the card.
8
N/A
Figure 13
Signal to controller indicating the 73S8009C is
ready because VCC is above the required value
after CMDVCC% and/or CMDVCC# is asserted
low. A 20 kΩ pull-up resistor to VDD is provided
internally. Pull-up is disabled in Power down
state and CS=0 modes.
24
15
I
Figure 12 Power control pin. Connected to normally
open SPST switch to ground. Closing switch
for duration greater than de-bounce period will
turn 73S8009C circuit “on.” If 73S8009C is
“on,” closing switch will turn 73S8009C to “off”
state after the de-bounce period and
OFF_REQ/OFF_ACK handshake.
11
N/A
O Figure 20 Digital output. Request to the host system
controller to turn the 73S8009C off. If ON_OFF
switch is closed (to ground) for de-bounce
duration and circuit is “on,” OFF_REQ will go
high (Request to turn OFF). Connected to
OFF_ACK via 100 kΩ internal resistor.
9
N/A
I
Figure 19 Setting OFF_ACK high will power “off” all
analog functions and disconnect the 73S8009C
from VBAT or VPC. The pin has an internal
100 kΩ resistor connection to OFF_REQ so
that when not connected or no host interaction
is required, the Acknowledge will be true and
the circuit will turn “off” immediately with
OFF_REQ.
Rev. 1.4
9
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