Data Sheet

18
TCA9548A
SCPS207F –MAY 2012–REVISED NOVEMBER 2016 www.ti.com
Product Folder Links: TCA9548A
Submit Documentation Feedback Copyright © 2012–2016, Texas Instruments Incorporated
8.5.5 RESET Input
The RESET input is an active-low signal that may be used to recover from a bus-fault condition. When this signal
is asserted low for a minimum of t
WL
, the TCA9548A resets its registers and I
2
C state machine and deselects all
channels. The RESET input must be connected to V
CC
through a pull-up resistor.
8.5.6 Power-On Reset
When power (from 0 V) is applied to V
CC
, an internal power-on reset holds the TCA9548A in a reset condition
until V
CC
has reached V
POR
. At that point, the reset condition is released and the TCA9548A registers and I
2
C
state machine initialize to their default states. After that, V
CC
must be lowered to below V
POR
and then back up to
the operating voltage for a power-reset cycle.