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MSM6542-1

REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT

Oki Electric Industry 

MSM6542-01/02/03

¡ Semiconductor

Switching Characteristics

80-xxx

Write mode (ALE is always at VDD.)

Rating

CS1 set-up time

CS1 hold time

Address stable before WRITE

Address stabel after WRITE

WRITE pulse width

Data set-up time

Data hold time

RD/WR recovery time

(VDD = 5V ±10%, Ta = –40 to +85°C (in the 80 mode for the MSM6542-01/03))

Symbol

Condition

Min. Typ. Max. Unit

tC1S

–

1000

–

–

ns

tC1H

–

1000

–

–

ns

tAW

–

20

–

–

ns

tWA

–

10

–

–

ns

tWW

–

120

–

–

ns

tDS

–

100

–

–

ns

tDH

–

10

–

–

ns

tRCV

–

100

–

–

ns

CS1

A0 ~ A3

CS0

WR

D0 ~ D3

(Input)

VIH2

tC1S

VIH1

VIL1

tAW

VIH1

VIH2

tC1H

VIH1

VIL1

tWW

tWA

VIL1

VIL1

VIH1

tRCV

VIH1

tDH

tDS

VIH1 VIH1

VIL1 VIL1

VIHI = 2.2V

VIL1 = 0.8V

VIH2

=

4

5

VDD

VIL2

=

1

5

VDD

74

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