LH5164AH Sharp Electrionic Components, LH5164AH Datasheet - Page 8

• Manufacturer Part Number: LH5164AH
• Description: CMOS 64K (8K x 8) Static RAM
• Manufacturer: Sharp Electrionic Components

LH5164A/AH
8
NOTES:
1. The writing occurs during an overlapping period of CE
2. t
3. t
4. t
5. If CE
6. If CE
7. While I/O pins are in the output state, input signals with the opposite logic level must not be applied.
to the time when the writing is finished.
outputs will remain high-impedance.
outputs will remain high-impedance.
CW
AS
WR
is defined as the time from address change to writing start.
is defined as the time from the last occuring transition, either CE
is defined as the time from writing finish to address change.
1
1
LOW transition or CE
HIGH transition or CE
A
0
D
- A
CE
CE
WE
OUT
D
OE = 'LOW'
12
IN
1
2
(NOTE 7)
2
2
HIGH transition occurs at the same time or after WE LOW transition, the
LOW transition occurs at the same time or before WE HIGH transition, the
(NOTE 5)
(NOTE 3)
t
AS
Figure 7. Write Cycle 2
1
= 'LOW,' CE
t
AW
t
WC
2
(NOTE 2)
1
t
WZ
= 'HIGH,' and WE = 'LOW' (t
LOW transition or CE
t
CW
t
CW
(NOTE 1)
t
WP
HIGH-Z
t
DW
DATA VALID
t
t
t
WR
WR
WR
2
(NOTE 6)
HIGH transition,
CMOS 64K (8K
t
DH
t
(NOTE 4)
OW
WP
).
8) Static RAM
5164A-5