MT55L256L36P MICRON [Micron Technology], MT55L256L36P Datasheet - Page 24

• Manufacturer Part Number: MT55L256L36P
• Description: 8Mb ZBT SRAM
• Manufacturer: MICRON [Micron Technology]

SNOOZE MODE
mode in which the device is deselected and current is
reduced to I
dictated by the length of time the ZZ pin is in a HIGH
state. After the device enters SNOOZE MODE, all inputs
except ZZ become disabled and all outputs go to
High-Z.
that causes the device to enter SNOOZE MODE. When
SNOOZE MODE ELECTRICAL CHARACTERISTICS
NOTE: 1. This parameter is sampled.
8Mb: 512K x 18, 256K x 32/36 Pipelined ZBT SRAM
MT55L512L18P_2.p65 – Rev. 6/01
DESCRIPTION
Current during SNOOZE MODE
ZZ active to input ignored
ZZ inactive to input sampled
ZZ active to snooze current
ZZ inactive to exit snooze current
SNOOZE MODE is a low-current, “power-down”
Outputs (Q)
ALL INPUTS
(except ZZ)
The ZZ pin is an asynchronous, active HIGH input
I
SUPPLY
CLK
ZZ
SB
2
Z
. The duration of SNOOZE MODE is
t
ZZI
t
I
ZZ
ISB2Z
SNOOZE MODE WAVEFORM
CONDITIONS
ZZ ≥ V
IH
24
High-Z
the ZZ pin becomes a logic HIGH, I
after the time
tion pending when the device enters SNOOZE MODE is
not guaranteed to complete successfully. Therefore,
SNOOZE MODE must not be initiated until valid pend-
ing operations are completed. Similarly, when exiting
SNOOZE MODE during
READ cycle should be given.
8Mb: 512K x 18, 256K x 32/36
SYMBOL
t
t
I
t
RZZI
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
RZZ
SB
ZZI
ZZ
2Z
t
ZZI is met. Any READ or WRITE opera-
PIPELINED ZBT SRAM
MIN
0
0
0
DESELECT or READ Only
t
RZZI
t
2(
2(
2(
RZZ, only a DESELECT or
MAX
t
t
t
KHKH)
KHKH)
KHKH)
10
t
RZZ
SB
UNITS
2
m A
ns
ns
ns
ns
Z
©2001, Micron Technology, Inc.
DON’T CARE
is guaranteed
NOTES
1
1
1
1