M41T01 datasheet(20/24 Pages) STMICROELECTRONICS

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DC and AC parameters

M41T01

20/24

DocID025389 Rev 2

Figure 13. Power down/up mode AC waveforms

1. Valid for Ambient Operating Temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted).

2. VCC fall time should not exceed 5 mV/μs.

1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted).

2. All voltages referenced to VSS.

3. In 3.3 V application, if initial battery voltage is

 3.4 V, it may be necessary to reduce battery voltage (i.e.,

through wave soldering the battery) in order to avoid inadvertent switchover/deselection for VCC – 10%

operation.

4. Switchover and deselect point.

Table 8. Power down/up AC characteristics

Symbol

Parameter(1)

Min

Max

Unit

tPD

SCL and SDA at VIH before power-down

trec(2)

SCL and SDA at VIH after power-up

μs

Table 9. Power down/up trip points DC characteristics

Symbol

Parameter(1,2)

Min

Typ

Max(3)

Unit

Symbol

Parameter(1,2)

Min

Typ

Max(3)

Unit

VSO(4)

Battery backup switchover

voltage

VBAT –

0.80

VBAT –

0.50

VBAT –

0.30

AI00596

VCC

trec

tPD

VSO

SDA

SCL

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