M41T56

DC and AC parameters

Doc ID 6104 Rev 9

19/27

Table 9.

Power down/up mode AC characteristics

Symbol

Parameter(1)

1.

Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 4.5 to 5.5 V (except where noted).

Min

Max

Unit

tPD

SCL and SDA at VIH before power-down

0

ns

tFB

VPFD (min) to VSS VCC fall time

300

µs

tRB

VSS to VPFD (min) VCC rise time

100

µs

tREC

SCL and SDA at VIH after power-up

10

µs

Table 10.

Power down/up trip points DC characteristics

Symbol

Parameter(1)(2)

1.

All voltages referenced to VSS.

2.

Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 4.5 to 5.5 V (except where noted).

Min

Typ

Max

Unit

VPFD

Power-fail deselect voltage

1.2 VBAT

1.25 VBAT

1.285 VBAT

V

VSO

Battery back-up switchover voltage

VBAT

V