2Mb: 128K x 18, 64K x 32/36
FLOW-THROUGH SYNCBURST SRAM
ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS
(Note 1) (0°C ≤ TA ≤ +70°C; VDD = +3.3V +0.3V/-0.165V)
-6.8
-7.5
-8.5
-10
DESCRIPTION
SYMBOL
MIN
MAX MIN
MAX MIN
MAX MIN
MAX UNITS NOTES
Clock
t
Clock cycle time
KC
8.0
8.8
125
10.0
15
100
ns
f
Clock frequency
KF
113
7.5
66
MHz
ns
t
Clock HIGH time
KH
1.8
1.8
1.9
1.9
1.9
4.0
2
2
t
Clock LOW time
KL
1.9
4.0
ns
Output Times
t
Clock to output valid
Clock to output invalid
Clock to output in Low-Z
Clock to output in High-Z
OE# to output valid
OE# to output in Low-Z
OE# to output in High-Z
Setup Times
KQ
6.8
1.5
1.5
3.8
3.8
0
8.5
3.0
4.0
5.0
5.0
0
10.0
ns
ns
ns
ns
ns
ns
ns
t
KQX
1.5
1.5
3.0
4.0
3
t
KQLZ
3, 4, 5, 6
3, 4, 5, 6
7
t
KQHZ
4.2
4.2
5.0
5.0
t
OEQ
t
OELZ
0
0
3, 4, 5, 6
3, 4, 5, 6
t
OEHZ
3.8
4.2
5.0
5.0
t
Address
AS
1.8
1.8
1.8
1.8
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
ns
ns
ns
ns
8, 9
8, 9
8, 9
8, 9
t
Address status (ADSC#, ADSP#)
Address advance (ADV#)
ADSS
t
AAS
t
Byte write enables
WS
(BWa#-BWd#, GW#, BWE#)
t
Data-in
DS
1.8
1.8
2.0
2.0
2.0
2.0
2.5
2.5
ns
ns
8, 9
8, 9
t
Chip enable (CE#)
Hold Times
CES
t
Address
AH
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
ns
ns
ns
ns
8, 9
8, 9
8, 9
8, 9
t
Address status (ADSC#, ADSP#)
Address advance (ADV#)
ADSH
t
AAH
t
Byte write enables
WH
(BWa#-BWd#, GW#, BWE#)
t
Data-in
DH
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
ns
ns
8, 9
8, 9
t
Chip enable (CE#)
CEH
NOTE:
1. Test conditions as specified with the output loading shown in Figure 1 for 3.3V I/O (VDDQ = +3.3V +0.3V/-0.165V) and Figure 3
for 2.5V I/O (VDDQ = +2.5V +0.4V/-0.125V).
2. Measured as HIGH above VIH and LOW below VIL.
3. This parameter is measured with the output loading shown in Figure 2 for 3.3V I/O and Figure 4 for 2.5V I/O.
4. This parameter is sampled.
5. Transition is measured ±500mV from steady state voltage.
6. Refer to Technical Note TN-58-09, “Synchronous SRAM Bus Contention Design Considerations,” for a more thorough
discussion on these parameters.
7. OE# is a “Don’t Care” when a byte write enable is sampled LOW.
8. A READ cycle is defined by byte write enables all HIGH or ADSP# LOW for the required setup and hold times. A WRITE
cycle is defined by at least one byte write enable LOW and ADSP# HIGH for the required setup and hold times.
9. This is a synchronous device. All addresses must meet the specified setup and hold times for all rising edges of CLK when
either ADSP# or ADSC# is LOW and chip enabled. All other synchronous inputs must meet the setup and hold times with
stable logic levels for all rising edges of clock (CLK) when the chip is enabled. Chip enable must be valid at each rising edge
of CLK when either ADSP# or ADSC# is LOW to remain enabled.
2Mb: 128K x 18, 64K x 32/36 Flow-Through SyncBurst SRAM
MT58L128L18F.p65 – Rev. 6/99
Micron Technology, Inc., reserves the right to change products or specifications without notice.
1999, Micron Technology, Inc.
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