M41ST84W datasheet(30/34 Pages) STMICROELECTRONICS

No de pièce	M41ST84W

Description	3.0/3.3 V I2C serial RTC with 44 bytes of NVRAM and supervisory functions

PDF	34 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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30 / 34 page

DC and AC parameters

M41ST84W

30/34

Figure 18.

Power down/up mode AC waveforms

Table 14.

Power down/up AC characteristics

Symbol

Parameter(1)

Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6 V (except where noted).

Min

Typ

Max

Unit

(2)

VPFD(max) to VPFD(min) fall time of less than tF may result in deselection/write protection not occurring until 200 µs after

VCC passes VPFD(min).

VPFD(max) to VPFD(min) VCC fall time

300

µs

tFB

(3)

VPFD(min) to VSS fall time of less than tFB may cause corruption of RAM data.

VPFD(min) to VSS VCC fall time

µs

tPFD

PFI to PFO propagation delay

µs

VPFD(min) to VPFD(max) VCC rise time

µs

tRB

VSS to VPFD(min) VCC rise time

µs

trec

(4)

Programmable (see Table 7 on page 26)

Power up deselect time

200

AI03681

VCC

INPUTS

(PER CONTROL INPUT)

OUTPUTS

DON'T CARE

HIGH-Z

tFB

tRB

tDR

VALID

(PER CONTROL INPUT)

RECOGNIZED

VPFD (max)

VPFD (min)

VSO

tREC

RST

PFO

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