M41ST85WMH6F datasheet(33/43 Pages) STMICROELECTRONICS

Part #	M41ST85WMH6F

Description	3.0/3.3 V I²C combination serial RTC, NVRAM supervisor and microprocessor supervisor

PDF	43 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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33 / 43 page

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M41ST85W

DC and AC parameters

Figure 20. Power down/up mode AC waveforms

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

Table 13. Power down/up AC characteristics

Symbol

Parameter(1)

Min

Typ

Max

Unit

(2)

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

300

µs

tFB

(3)

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)

Power-up deselect time

200

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

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).

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

4. Programmable (see Table 6 on page 28)

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