AC CHARACTERISTICS
1, 2, 3
(T
A
= 0 to +70
°
C, V
CC
= 5.0 V
±
10%)
PARAMETER
SYMBOL
MIN.
MAX.
UNIT
NOTE
Random read, write cycle time
Read modify write cycle time
CE pulse width
CE precharge time
Address setup time
Address hold time
Read command setup time
Read command hold time
CE access time
OE access time
Output enable time from CE
Output enable time from OE
Output enable time from R/W
Output disable time from CE
Output disable time from OE
Output diable time from R/W
OE setup time
OE hold time
Write command pulse width
Write command setup time
Write command hold time
Data setup time from R/W
Data setup time from CE
Data hold time from R/W
Data hold time from CE
Transition time (rise and fall)
Refresh time interval
Refresh command hold time
Auto refresh cycle time
Refresh delay time from CE
Refresh pulse width (Auto refresh)
Refresh precharge time (Auto refresh)
Refresh pulse width (Self refresh)
CE delay time from refresh precharge (Self refresh)
t
RC
t
RMW
t
CE
t
P
t
AS
t
AH
t
RCS
t
RCH
t
CEA
t
OEA
t
CLZ
t
OLZ
t
WLZ
t
CHZ
t
OHZ
t
WHZ
t
OES
t
OEH
t
WP
t
WCS
t
WCH
t
DSW
t
DSC
t
DHW
t
DHC
t
T
t
REF
t
RHC
t
FC
t
RFD
t
FAP
t
FP
t
FAS
t
FRS
140
205
80
50
0
20
0
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
ns
ns
10,000
4
4
80
30
5
5
20
0
0
25
25
25
10
10
30
30
50
30
30
0
0
3
6
6
6
6
35
8
15
130
50
30
30
8,000
160
8,000
NOTES:
1.
In order to initialize the circuit, an initialize pause of 100
μ
s with
CE
= V
, RFSH = V
(or CE
= V
, RFSH = V
) is required
after power-up, followed by at least 8 dummy cycles.
2.
AC characteristics are measured at t
T
= 5 ns.
3.
AC characteristics are measured at the following condition (see
figure at right):
4.
Address is latched at the negative edge of CE
1
or at the positive
edge of CE
2
.
5.
Measured with a load equivalent to 2TTL + 100 pF.
6.
Data is latched at the positive edge of R/W, at the positive edge
of CE
1
, or at the negative edge of CE
2
.
2.4 V
0.8 V
2.6 V
0.6 V
2.2 V
0.8 V
OUTPUT
INPUT
5P860-12
Figure 3. AC Characteristics
LH5P860
CMOS 512K (64K
×
8) Pseudo-Static RAM
4