M41ST95W datasheet(28/35 Pages) STMICROELECTRONICS

Part #	M41ST95W

Description	5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor

PDF	35 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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28 / 35 page

M41ST95Y*, M41ST95W

28/35

Figure 21. Power Down/Up Mode AC Waveforms

Table 14. 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 8., page 23)

5. After crystal oscillator has started

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

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

µs

tRB

VSS to VPFD (min) VCC Rise Time

1µs

tPFD

PFI to PFO Propagation Delay

µs

tREC

(4,5)

Power up Deselect Time

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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