M41ST85W datasheet(33/41 Pages) STMICROELECTRONICS

部件名	M41ST85W

功能描述	3.0/3.3V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor

PDF	41 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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33 / 41 page

M41ST85W

DC and AC parameters

33/41

Figure 20.

Power down/up mode AC waveforms

Table 13.

Power down/up AC characteristics

Symbol

Parameter(1)

Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6V (except where otherwise 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

200µs 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

tPD

EX at VIH before Power Down

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 6 on page 28)

Power up Deselect Time

200

AI03661

VCC

INPUTS

(PER CONTROL INPUT)

OUTPUTS

DON'T CARE

HIGH-Z

tFB

tPD

tRB

tDR

VALID

(PER CONTROL INPUT)

RECOGNIZED

VPFD (max)

VPFD (min)

VSO

trec

RST

ECON

PFO

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