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20 MHz
AC Electrical Characteristics
(Continued)
(See Notes 1 and 4 and
Figures 1
thru
5
) V
CC
e
5V
g
5%T
A
eb
55
Cto
a
125
C for HPC167064 and V
CC
e
5V
g
10%
T
A
e
0
Cto
a
70
C for HPC467064 (Continued)
Symbol and Formula Parameter Min Max Units Notes
t
DC1ALER
Delay from CKI Rising Edge to ALE Rising Edge 0 35 ns (Notes 1 2)
t
DC1ALEF
Delay from CKI Rising Edge to ALE Falling Edge 0 35 ns (Notes 1 2)
t
DC2ALER
e
t
C
a
20 Delay from CK2 Rising Edge to ALE Rising Edge 45 ns
t
DC2ALEF
e
t
C
a
20 Delay from CK2 Falling Edge to ALE Falling Edge 45 ns
t
LL
e
t
C
b
9 ALE Pulse Width 41 ns
t
ST
e
t
C
b
7 Setup of Address Valid before ALE Falling Edge 18 ns
t
VP
e
t
C
b
5 Hold of Address Valid after ALE Falling Edge 20 ns
t
ARR
e
t
C
b
5 ALE Falling Edge to RD Falling Edge 20 ns
t
ACC
e
t
C
a
WS
b
55 Data Input Valid after Address Output Valid 145 ns
t
RD
e
t
C
a
WS
b
65 Data Input Valid after RD Falling Edge 85 ns
t
RW
e
t
C
a
WS
b
10 RD Pulse Width 140 ns
t
DR
e
t
C
b
15 Hold of Data Input Valid after RD Rising Edge 0 60 ns
t
RDA
e
t
C
b
15 Bus Enable after RD Rising Edge 85 ns
t
ARW
e
t
C
b
5 ALE Falling Edge to WR Falling Edge 45 ns
t
WW
e
t
C
a
WS
b
15 WR Pulse Width 160 ns
t
V
e
t
C
a
WS
b
5 Data Output Valid before WR Rising Edge 145 ns
t
HW
e
t
C
b
5 Hold of Data Valid after WR Rising Edge 20 ns
t
DAR
e
t
C
a
WS
b
50 Falling Edge of ALE to Falling Edge of RDY 75 ns
t
RWR
e
t
C
RDY Pulse Width 100 ns
Address CyclesRead CyclesWrite Cycles
Ready
Input
4