M41ST87WMX6 datasheet(44/48 Pages) STMICROELECTRONICS

部件名	M41ST87WMX6

功能描述	5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM

PDF	48 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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44 / 48 page

DC and AC parameters

M41ST87Y, M41ST87W

44/48

Table 18.

Power down/up AC characteristics

Symbol

Parameter(1)

Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5 V or 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

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

Power-up deselect time

98(4)

Programmable (see Table 12 on page 39)

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