Datasheet

DS_8009C_025 73S8009C Data Sheet
Rev. 1.5 9
Pin
Name
Pin
(QFN32)
Type
Equivalent
Circuit
Description
ON_OFF 24 I
Figure 11
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.
OFF_REQ 11 O
Figure 19
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.
OFF_ACK 9 I
Figure 18 Setting OFF_ACK high will power “off” all analog
functions and disconnect the 73S8009C from V
BAT
or
V
PC
. 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.