Hello,
Regarding to SIM*I/O at deactivation on TXS4558, my customer is asking some question.
At deactivation(VSIM=1.8V), short pulse (about 1ms) is occurred after SIM*I/O is off.
(Please refer attached file.)
(Question)
(1) is this occurred by TXS4558? (Is it specification of TXS4558?)
(2) According to ISO/IEC7816-3, I/O needs to make low before Vcc is off.
In this case, is there any problem about above short pulse?
Regards,
Tao_2199
TXS4558 signals at deactivation.xlsx
