DocID7531 Rev 12

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M41ST85W

DC and AC parameters

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Figure 20. Power down/up mode AC waveforms

AI03661

VCC

INPUTS

(PER CONTROL INPUT)

OUTPUTS

DON'T CARE

HIGH-Z

tF

tFB

tR

tPD

tRB

tDR

VALID

VALID

(PER CONTROL INPUT)

RECOGNIZED

RECOGNIZED

VPFD (max)

VPFD (min)

VSO

trec

RST

ECON

PFO

Table 13. Power down/up AC characteristics

Symbol

Parameter(1)

Min

Typ

Max

Unit

tF

(2)

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

300

µs

tFB

(3)

VPFD(min) to VSS VCC fall time

10

µs

tPD

EX at VIH before power down

0

µs

tPFD

PFI to PFO propagation delay

15

25

µs

tR

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

10

µs

tRB

VSS to VPFD(min) VCC rise time

1

µs

trec

(4)

Power-up deselect time

40

200

ms

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)