MSM6242B Просмотр технического описания (PDF) - Oki Electric Industry

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MSM6242B

DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR

Oki Electric Industry 

MSM6242B

SWITCHING CHARACTERISTICS

(1) WRITE mode (ALE = VDD)

Parameter

CS1 Set up Time

CS1 Hold Time

Address Stable Before

WRITE

Address Stable After

WRITE

WRITE Pulse Width

Data Set up Time

Data Hold Time

RD / WR Recovery Time

Symbol

tC1S

tC1H

tAW

tWA

tWW

tDS

tDH

tRCV

Condition

—

—

—

—

—

—

—

—

¡ Semiconductor

(VDD = 5V ± 10% Ta = -40 to +85°C)

Min.

Max.

Unit

1000

—

1000

—

20

—

10

—

ns

120

—

100

—

10

—

60

—

CS1

A0 ~ A3

CS0

WR

D0 ~ D3

(INPUT)

VIH2 –

VIH1 –

VIL1 –

VIH1 –

VIH1 –

VIL1 –

tC1S

tC1H

,,,

,,,,,,,,,

tAW

,,,, ,,,

tWW

tDS

tW,,tA,DH,,t,R,C,V,,,,,,,,,,

,,,,,,,,,,,,,,,,,,,

Figure 4. Write Cycle — (ALE = VDD)

VIH1 = 2.2V

VIL1 = 0.8V

VIH2 = 4/5VDD

VIL2 = 1/5VDD

(2) WRITE mode (With use of ALE)

Parameter

CS1 Set up Time

Address Set up Time

Address Hold Time

ALE Pulse Width

ALE Before WRITE

WRITE Pulse Width

ALE After WRITE

DATA Set up Time

DATA Hold Time

CS1 Hold Time

RD / WR Recovery Time

Symbol

tC1S

tAS

tAH

tAW

tALW

tWW

tWAL

tDS

tDH

tC1H

tRCV

Condition

—

—

—

—

—

—

—

—

—

—

—

(VDD = 5V ± 10%, Ta = -40 ~ +85°C)

Min.

Max.

Unit

1000

—

25

—

25

—

40

—

10

—

ns

120

—

20

—

100

—

10

—

1000

—

60

—

28

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