M41ST87WMX6TR datasheet(38/42 Pages) STMICROELECTRONICS

Part #	M41ST87WMX6TR

Description	5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection

PDF	42 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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38 / 42 page

M41ST87Y, M41ST87W

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Figure 28. Power Down/Up Mode AC Waveforms

Table 18. Power Down/Up AC Characteristics

Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V or 2.7 to 3.6V (except where noted).

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).

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

4. Programmable (see Table 12., page 33)

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

0µs

tPFD

PFI to PFO Propagation Delay

µs

VPFD(min) to VPFD(max) VCC Rise Time

µs

tRB

VSS to VPFD(min) VCC Rise Time

1µs

trec

Power up Deselect Time

98(4)

AI07085

VCC

INPUTS

(PER CONTROL INPUT)

OUTPUTS

DON'T CARE

HIGH-Z

tFB

tPD

tRB

VALID

(PER CONTROL INPUT)

RECOGNIZED

VPFD (max)

VPFD (min)

VSO

trec

RST

ECON

PFO

VALID

M41ST87WMX6TR Datasheet(PDF) 38 Page - STMicroelectronics

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