MB90437LPF datasheet(42/61 Pages) CYPRESS

42 / 61 page

MB90435 Series

DS07-13727-2E

(6) Bus Timing (Write)

(MB90F438L (S) /437L (S) /438L (S) : VCC

= 3.5 V to 5.5 V, VSS = AVSS = 0.0 V, TA = −40 °C to +105 °C)

(MB90F439 (S) /439 (S) /V540G : VCC

= 5.0 V ± 10%, VSS = AVSS = 0.0 V, TA = −40 °C to +105 °C)

Parameter

Symbol

Pin name

Condition

Value

Units Remarks

Min

Max

Valid address

→WR↓time

tAVWL

A16 to A23

AD00 to AD15,

⎯

tCP

− 15

⎯

WR pulse width

tWLWH

3 tCP/2

− 20

⎯

Valid data output

→WR↑time

tDVWH

AD00 to AD15,

3 tCP/2

− 20

⎯

↑→Data hold time

tWHDX

AD00 to AD15,

⎯

↑→Address valid time

tWHAX

A16 to A23,

tCP/2

− 10

⎯

↑→ALE↑time

tWHLH

WR, ALE

tCP/2

− 15

⎯

↑→CLK↑time

tWLCH

WR, CLK

tCP/2

− 20

⎯

0.8 V

2.4 V

0.8 V

2.4 V

0.8 V

2.4 V

0.8 V

2.4 V

0.8 V

2.4 V

CLK

ALE

WR (WRL, WRH)

A16 to A23

AD00 to AD15

tWHLH

tAVWL

tWLWH

tWHAX

tWHDX

tWLCH

tDVWH

Address

Write data

• Bus Timing (Write)

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