SCPS253C January 2014 – September 2019 TCA5013
PRODUCTION DATA.
The TCA5013 has internal voltage supervisors that monitor VDD and VDDI voltages. When VDD falls below VDDTH all card interfaces are deactivated and the supervisor fault (see Supervisor Fault) is asserted.
The VDDI supervisor monitors the voltage on the VDDI pin. When VDDI falls below VDDITH all card interfaces are deactivated and the device enters power off mode (see Power Off Mode). When VDDI falls below VDDITH the supervisor fault is not asserted.
It is possible that the supervisor fault is asserted during power up If VDDI ramps before VDD (depending on the VDD ramp rate). If VDD is ramped and stable before VDDI is ramped, the supervisor fault will not be asserted. Figure 18 shows the operation of voltage supervisor for various combinations of VDD and VDDI.