PEDD514260ESL-01
MSM514260E/ESL
Notes: 1. A start-up delay of 200µs is required after power-up, followed by a minimum of eight initialization
cycles (RAS-only refresh or CAS before RAS refresh) before proper device operation is achieved.
2. The AC characteristics assume t = 5ns.
T
3.
V
(Min.) and V (Max.) are reference levels for measuring input timing signals. Transition times
IH IL
(t ) are measured between V and V .
T
IH
IL
4. This parameter is measured with a load circuit equivalent to 2 TTL load and 100pF.
5. Operation within the t
(Max.) limit ensures that t
(Max.) can be met.
RAC
RCD
t
(Max.) is specified as a reference point only. If t
is greater than the specified t
(Max.)
(Max.)
RCD
RCD
RCD
limit, then the access time is controlled by t
.
CAC
6. Operation within the t
(Max.) limit ensures that t
(Max.) is specified as a reference point only. If t
(Max.) can be met.
RAD
RAC
RAD
t
is greater than the specified t
RAD
RAD
limit, then the access time is controlled by t
.
AA
7.
t
(Max.) and t
(Max.) define the time at which the output achieved the open circuit
OEZ
OFF
condition and are not referenced to output voltage levels.
8.
9.
t
or t
must be satisfied for a read cycle.
RRH
RCH
t
, t
, t
, t
and t
are not restrictive operating parameters. They are included in
CPWD
WCS CWD RWD AWD
the data sheet as electrical characteristics only. If t
≥ t
(Min.), then the cycle is an early
WCS
WCS
write cycle and the data out will remain open circuit (high impedance) throughout the entire cycle.
If t ≥ t (Min.), t ≥ t (Min.), t ≥ t (Min.) and t ≥ t (Min.), then
CWD
CWD
RWD
RWD
AWD
AWD
CPWD
CPWD
the cycle is a read modify write cycle and data out will contain data read from the selected cell; if
neither of the above sets of conditions is satisfied, then the condition of the data out (at access time)
is indeterminate.
10. These parameters are referenced to the UCAS and LCAS, leading edges in an early write cycle,
and to the WE leading edge in an OE control write cycle, or a read modify write cycle.
11. These parameters are determined by the falling edge of either UCAS or LCAS, whichever is
earlier.
12. These parameters are determined by the rising edge of either UCAS or LCAS, whichever is later.
13. tCWL should be satisfied by both UCAS and LCAS.
14. tCP is determined by the time both UCAS and LCAS are high.
15. Only SL version.
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OKI [ OKI ELECTRONIC COMPONETS ]
