M41T81S datasheet(22/29 Pages) STMICROELECTRONICS

Part #	M41T81S

Description	Serial Access Real-Time Clock with Alarms

PDF	29 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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M41T81S

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Figure 17. Power Down/Up Mode AC Waveforms

Table 11. Power Down/Up AC Characteristics

Note: 1. VCC fall time should not exceed 5mV/µs.

2. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 5.5V (except where noted).

Table 12. Power Down/Up Trip Points DC Characteristics

Note: 1. All voltages referenced to VSS.

2. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 5.5V (except where noted).

Symbol

Parameter(1,2)

Min

Typ

Max

Unit

tPD

SCL and SDA at VIH before Power Down

0nS

trec

SCL and SDA at VIH after Power Up

µS

Sym

Parameter(1,2)

Min

Typ

Max

Unit

VPFD

Power-fail Deselect

2.5

2.6

2.7

Hysteresis

VSO

Battery Back-up Switchover Voltage

(VCC < VBAT; VCC < VPFD)

VBAT < VPFD

VBAT

VBAT > VPFD

VPFD

Hysteresis

AI00596

VCC

trec

tPD

VSO

SDA

SCL

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