M48Z32V Просмотр технического описания (PDF) - STMicroelectronics

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производитель

M48Z32V

3.3V, 256 Kbit (32 Kbit x8) ZEROPOWER® SRAM

STMicroelectronics 

M48Z32V

Figure 10. Power Down/Up Mode AC Waveforms

VCC

VPFD (max)

VPFD (min)

VSO

tF

tFB

tPD

INPUTS

RECOGNIZED

tRB

tDR

DON'T CARE

OUTPUTS

VALID

(PER CONTROL INPUT)

HIGH-Z

tR

tREC

RECOGNIZED

VALID

(PER CONTROL INPUT)

AI01168C

Table 9. Power Down/Up AC Characteristics

Symbol

Parameter(1)

Min

Max

Unit

tPD

E or W at VIH before Power Down

0

µs

tF(2)

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

300

µs

tFB(3)

VPFD (min) to VSS VCC Fall Time

10

µs

tR

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

10

µs

tRB

VSS to VPFD (min) VCC Rise Time

1

µs

tREC(4) VPFD (max) to Inputs Recognized

40

200

ms

Note: 1. Valid for Ambient Operating Temperature: TA = 0 to 70°C or –40 to 85°C; VCC = 3.0 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 pass-

es VPFD (min).

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

4. tREC (min) = 20ms for industrial temperature Grade (6) device.

Table 10. Power Down/Up Trip Points DC Characteristics

Symbol

Parameter(1,2)

Min

Typ

Max

VPFD Power-fail Deselect Voltage

2.7

2.85

3.0

VSO Battery Back-up Switchover Voltage

VPFD – 100mV

Note: 1. All voltages referenced to VSS.

2. Valid for Ambient Operating Temperature: TA = 0 to 70°C or –40 to 85°C; VCC = 3.0 to 3.6V (except where noted).

Unit

V

V

12/16

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