MO SEL VITELIC
V53C16258H
AC Characteristics (Cont’d)
25
(100 MHz)
30
35
40
45
50
#
Symbol Parameter
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Unit Notes
54
55
56
t
t
t
OE High Pulse Width
4
5
8
10
10
10
ns
ns
OEP
T
Transition Time (Rise and Fall)
Refresh Interval (512 Cycles)
1.5 50 1.5 50 1.5 50 1.5 50 1.5 50 1.5 50
15
17
8
8
8
8
8
8
ms
REF
Optional Self Refresh
57
58
59
60
t
t
t
t
RAS Pulse Width During Self
Refresh
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
µs
ns
ns
µs
18
18
18
18
RASS
RAS Precharge Time During
Self Refresh
RPS
CAS Hold Time Width During
Self Refresh
CHS
CHD
CAS Low Time During Self
Refresh
Notes:
1.
I
is dependent on output loading when the device output is selected. Specified I (max.) is measured with the
C
C
C
C
output open.
2.
I
is dependent upon the number of address transitions. Specified I (max.) is measured with a maximum of two
CC
CC
transitions per address cycle in EDO Page Mode.
3. Specified V (min.) is steady state operating. During transitions, V (min.) may undershoot to –1.0 V for a period
IL
IL
not to exceed 20 ns. All AC parameters are measured with V (min.) ≥ V and V (max.) ≤ V
.
IL
SS
IH
CC
4.
t
(max.) is specified for reference only. Operation within t
(max.) limits insures that t
(max.) and t
RCD
RCD
RAC CAA
(max.) can be met. If t
is greater than the specified t
(max.), the access time is controlled by t
and t
.
RCD
RCD
CAA
CAC
5. Either t
or t
must be satisified for a Read Cycle to occur.
RRH
RCH
6. Measured with a load equivalent to one TTL input and 50 pF.
7. Access time is determined by the longest of t , t and t
.
CAP
CAA CAC
8. Assumes that t
≤ t
(max.). If t
is greater than t
(max.), t
will increase by the amount that t
RAD
RAD
RAD
RAD
RAC RAD
exceeds t
(max.).
RAD
9. Assumes that t
≤ t
(max.). If t
(max.).
is greater than t
(max.), t
will increase by the amount that t
RCD
RCD
RCD
RCD
RAC RCD
exceeds t
(max.).
RCD
10. Assumes that t
≥ t
RAD
RAD
11. Operation within the t
(max.) limit ensures that t
(max.) can be met. t
(max.) is specified as a reference
RAD
RAC
RAD
point only. If t
is greater than the specified t
(max.) limit, the access time is controlled by t
and t
.
RAD
RAD
CAA
CAC
12.
13.
14.
t
t
t
, t
, t
and t
are not restrictive operating parameters.
WCS RWD AWD
CWD
(min.) must be satisfied in an Early Write Cycle.
WCS
and t are referenced to the latter occurrence of CAS or WE.
DS
DH
15. t is measured between V (min.) and V (max.). AC-measurements assume t = 3 ns.
T
IH
IL
T
16. Assumes a three-state test load (5 pF and a 500 Ohm Thevenin equivalent).
17. An initial 200 µs pause and 8 RAS-containing cycles are required when exiting an extended period of bias without
clocks. An extended period of time without clocks is defined as one that exceeds the specified Refresh Interval.
18. One CBR refresh or complete set of row refreah cycles must be completed upon exiting Self Refreah Mode.
V53C16258H Rev. 3.8 November 1999
7
MOSEL [ MOSEL VITELIC, CORP ]
