MB90610A Series
(7) Bus Timing (Write)
(VCC = +2.7 V to +5.5 V, VSS = 0.0 V, TA = –40°C to +85°C)
Value
Sym-
Parameter
bol
Pin name
Conditions
Unit Remarks
Min.
Max.
—
Valid address → WR ↓ time tAVWL
Address
tCP – 15
ns
ns
WR pulse width
tWLWH
WRL, WRH
3 tCP/2 – 20
—
—
Valid data output → WR ↑
time
tDVWH
3 tCP/2 – 20
—
ns
Data
VCC = +5.0 V±10%
VCC = +3.0 V±10%
20
30
—
—
—
ns
ns
ns
WR ↑ → data hold time
tWHDX
WR ↑ → address valid time tWHAX Address
tCP/2 – 10
ALE, WRL,
WRH
WR ↑ → ALE ↑ time
WR ↓ → CLK ↓ time
tWHLH
tWLCL
tCP/2 – 15
tCP/2 – 20
—
—
ns
ns
—
WRL,
WRH, CLK
tWLCH
2.4 V
CLK
ALE
tWHLH
2.4 V
tWLWH
tAVWL
2.4 V
WR
(WRL, WRH)
0.8 V
tWHAX
Multiplex mode
2.4 V
0.8 V
2.4 V
0.8 V
A23 to
A16
tDVWH
tWHDX
2.4 V
0.8 V
2.4 V
0.8 V
2.4 V
0.8 V
AD15 to
AD00
Address
Write data
tWHAX
Non-multiplex mode
2.4 V
0.8 V
2.4 V
0.8 V
A23 to
A00
tWHDX
tDVWH
tWHDX
2.4 V
0.8 V
2.4 V
0.8 V
D15 to
D00
Write data
60
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