HM62256 Hitachi Semiconductor, HM62256 Datasheet - Page 8

• Manufacturer Part Number: HM62256
• Description: 32/768-word x 8-bit High Speed CMOS Static RAM
• Manufacturer: Hitachi Semiconductor

HM62256A Series
8
Read Timing Waveform (3)
Write Cycle
Parameter
———————————————————————————————————————————————–
Write cycle time
———————————————————————————————————————————————–
Chip selection to
end of write
———————————————————————————————————————————————–
Address setup time
———————————————————————————————————————————————–
Address valid to
end of write
———————————————————————————————————————————————–
Write pulse width
———————————————————————————————————————————————–
Write recovery time
———————————————————————————————————————————————–
WE to output in high-Z
———————————————————————————————————————————————–
Data to write time
overlap
———————————————————————————————————————————————–
Data hold from
write time
———————————————————————————————————————————————–
Output active from
end of write
———————————————————————————————————————————————–
Output disable to
output in high-Z
———————————————————————————————————————————————–
Notes: 1. t
CS
Dout
2. This parameter is sampled and not 100% tested.
3. WE is high for read cycle.
4. Device is continuously selected, CS = V
5. Address Valid prior to or coincident with CS transition Low.
6. OE = V
conditions and are not referenced to output voltage levels.
CHZ
and t
IL
.
Symbol
t
t
t
t
t
t
t
t
t
t
t
OHZ
WC
CW
AS
AW
WP
WR
WHZ
DW
DH
OW
OHZ
*3 *5 *6
are defined as the time at which the outputs achieve the open circuit
t
CLZ
HM62256A-8
—————– —————– —————– —————–
Min
85
75
0
75
55
0
0
40
0
5
0
*2
t
ACS
Max
—
—
—
—
—
—
30
—
—
—
30
HM62256A-10 HM62256A-12 HM62256A-15
Min
100
80
0
80
60
0
0
40
0
5
0
IL
.
Max
—
—
—
—
—
—
35
—
—
—
35
Min
120
85
0
85
70
0
0
50
0
5
0
Valid Data
Max
—
—
—
—
—
—
40
—
—
—
40
Min
150
100
0
100
90
0
0
60
0
5
0
HM62256A Series
—
—
—
—
—
—
50
—
—
—
50
Max
t
CHZ
*1,*2
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note
2
3
1
4
10
10
10, 11