M41T56(2006) 데이터 시트보기 (PDF) - STMicroelectronics

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M41T56
(Rev.:2006)

Serial real-time clock with 56 bytes NVRAM

STMicroelectronics 

DC and AC parameters

M41T56

Table 9.

Symbol

Power down/up mode AC characteristics

Parameter(1)

Min

Max

Unit

tPD

tFB

tRB

tREC

SCL and SDA at VIH before power down

VPFD (min) to VSS VCC fall time

VSS to VPFD (min) VCC rise time

SCL and SDA at VIH after power up

0

ns

300

µs

100

µs

10

µs

1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V (except where noted).

Table 10. Power down/up trip points DC characteristics

Symbol

Parameter(1)(2)

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

1. All voltages referenced to VSS.

2. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V (except where noted).

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