a42l2604 AMIC Technology Corporation, a42l2604 Datasheet - Page 10

• Manufacturer Part Number: a42l2604
• Description: 4m X 4 Cmos Dynamic Ram With Edo Page Mode - Amic Technology
• Manufacturer: AMIC Technology Corporation

Notes:
1.
2.
3. An initial pause of 200 s is required after power-up followed by any 8 RAS cycles before proper device operation is
4.
5.
6.
7.
8.
9.
10. t
11. t
12. Access time is determined by the longer of t
13. t
PRELIMINARY
achieved. In the case of an internal refresh counter, a minimum of 8 CAS -before- RAS initialization cycles instead of 8
I
I
RAS cycles are required. 8 initialization cycles are required after extended periods of bias without clocks.
AC Characteristics assume t
50pF, V
V
between V
Operation within the t
point only. If t
Operation within the t
point only. If t
Assumes three state test load (5pF and a 500 Thevenin equivalent).
Either t
voltage levels.
as electrical characteristics only. If t
and data-out pins will remain open circuit, high impedance, throughout the entire cycle. If t
t
the selected cell. If neither of the above conditions is satisfied, the condition of the data out at access time is
indeterminate.
CC1
CC1
OFF
WCS
CWD
ASC
IH
, I
(min.) and V
, t
and I
(max.) defines the time at which the output achieves the open circuit condition; it is not referenced to output
(min.) and t
CC3
t
WCH
CP
RCH
IL
, I
CC4
to achieve t
(min.)
, t
CC4
IH
or t
and V
depend on output loading. Specified values are obtained with the outputs open.
RWD
, and I
RCD
RAD
RRH
(June, 2002, Version 0.3)
, t
AWD
IL
is greater than the specified t
is greater than the specified t
GND and V
must be satisfied for a read cycle.
IL
(max.) are reference levels for measuring timing of input signals. Transition times are measured
CWD
CC5
.
PC
RCD
RAD
depend on cycle rate.
t
(min.) and t
AWD
and t
(max.) limit insures that t
(max.) limit insures that t
(min.), the cycle is a read-modify-write cycle and the data out will contain data read from
T
IH
AWD
= 2ns. All AC parameters are measured with a load equivalent to two TTL loads and
(max.)
are not restrictive operating parameters. They are included in the data sheet
CPA
WCS
(max.) values.
VCC.
AA
t
RCD
RAD
or t
WCS
CAC
(max.) limit, then access time is controlled exclusively by t
(max.) limit, then access time is controlled exclusively by t
(min.) and t
RAC
RAC
or t
CPA
(max.) can be met. t
(max.) can be met. t
9
.
WCH
t
WCH
(min.), the cycle is an early write cycle
RCD
RAD
(max.) is specified as a reference
(max.) is specified as a reference
AMIC Technology, Inc.
A42L2604 Series
RWD
t
RWD
(min.) , t
AA
CAC
.
.
CWD