
8
1Mb: 64K x 18, 32K x 32/36 3.3V I/O, Pipelined, SCD SyncBurst SRAM
Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT58L64L18P_B.p65 – Rev. B, Pub. 11/02
2002, Micron Technology, Inc.
1Mb: 64K x 18, 32K x 32/36
3.3V I/O, PIPELINED, SCD SYNCBURST SRAM
NOT RECOMENDED FOR NEW DESIGNS
NOTE: 1. X means “Don’t Care.” # means active LOW. H means logic HIGH. L means logic LOW.
2. For WRITE#, L means any one or more byte write enable signals (BWa#, BWb#, BWc# or BWd#) and BWE# are LOW or
GW# is LOW. WRITE# = H for all BWx#, BWE#, GW# HIGH.
3. BWa# enables WRITEs to DQa pins, DQPa. BWb# enables WRITEs to DQb pins, DQPb. BWc# enables WRITEs to DQc pins,
DQPc. BWd# enables WRITEs to DQd pins, DQPd. DQPa and DQPb are only available on the x18 and x36 versions. DQPc
and DQPd are only available on the x36 version.
4. All inputs except OE# and ZZ must meet setup and hold times around the rising edge (LOW to HIGH) of CLK.
5. Wait states are inserted by suspending burst.
6. For a WRITE operation following a READ operation, OE# must be HIGH before the input data setup time and held HIGH
throughout the input data hold time.
7. This device contains circuitry that will ensure the outputs will be in High-Z during power-up.
8. ADSP# LOW always initiates an internal READ at the L-H edge of CLK. A WRITE is performed by setting one or more
byte write enable signals and BWE# LOW or GW# LOW for the subsequent L-H edge of CLK. Refer to WRITE timing
diagram for clarification.
TRUTH TABLE
OPERATION
ADDRESS CE# CE2# CE2
ZZ ADSP# ADSC# ADV# WRITE# OE#
CLK
DQ
USED
Deselected Cycle, Power-Down
None
H
X
L
X
L
X
L-H
High-Z
Deselected Cycle, Power-Down
None
L
X
L
X
L-H
High-Z
Deselected Cycle, Power-Down
None
L
H
X
L
X
L-H
High-Z
Deselected Cycle, Power-Down
None
L
X
L
H
L
X
L-H
High-Z
Deselected Cycle, Power-Down
None
L
H
X
L
H
L
X
L-H
High-Z
SNOOZE MODE, Power-Down
None
X
H
XXXX
X
High-Z
READ Cycle, Begin Burst
External
L
H
L
X
L
L-H
Q
READ Cycle, Begin Burst
External
L
H
L
X
H
L-H
High-Z
WRITE Cycle, Begin Burst
External
L
H
L
H
L
X
L
X
L-H
D
READ Cycle, Begin Burst
External
L
H
L
H
L
X
H
L
L-H
Q
READ Cycle, Begin Burst
External
L
H
L
H
L
X
H
L-H
High-Z
READ Cycle, Continue Burst
Next
X
L
H
L
H
L
L-H
Q
READ Cycle, Continue Burst
Next
X
L
H
L
H
L-H
High-Z
READ Cycle, Continue Burst
Next
H
X
L
X
H
L
H
L
L-H
Q
READ Cycle, Continue Burst
Next
H
X
L
X
H
L
H
L-H
High-Z
WRITE Cycle, Continue Burst
Next
X
L
H
L
X
L-H
D
WRITE Cycle, Continue Burst
Next
H
X
L
X
H
L
X
L-H
D
READ Cycle, Suspend Burst
Current
X
L
HHHH
L
L-H
Q
READ Cycle, Suspend Burst
Current
X
L
HHHH
H
L-H
High-Z
READ Cycle, Suspend Burst
Current
H
X
L
X
H
L
L-H
Q
READ Cycle, Suspend Burst
Current
H
X
L
X
H
L-H
High-Z
WRITE Cycle, Suspend Burst
Current
X
L
H
L
X
L-H
D
WRITE Cycle, Suspend Burst
Current
H
X
L
X
H
L
X
L-H
D