參數(shù)資料
型號: MT55L256V36PT-6
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類: SRAM
英文描述: 256K X 36 ZBT SRAM, 3.5 ns, PQFP100
封裝: PLASTIC, TQFP-100
文件頁數(shù): 13/25頁
文件大?。?/td> 304K
代理商: MT55L256V36PT-6
20
8Mb: 512K x 18, 256K x 32/36 Pipelined ZBT SRAM
Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT55L512L18P_C.p65 – Rev. 2/02
2002, Micron Technology, Inc.
8Mb: 512K x 18, 256K x 32/36
PIPELINED ZBT SRAM
SNOOZE MODE
SNOOZE MODE is a low-current, “power-down”
mode in which the device is deselected and current is
reduced to ISB2Z. The duration of SNOOZE MODE is
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.
The ZZ pin is an asynchronous, active HIGH input
that causes the device to enter SNOOZE MODE. When
the ZZ pin becomes a logic HIGH, ISB2Z is guaranteed
after the time tZZI is met. Any READ or WRITE opera-
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 tRZZ, only a DESELECT or
READ cycle should be given.
SNOOZE MODE ELECTRICAL CHARACTERISTICS
DESCRIPTION
CONDITIONS
SYMBOL
MIN
MAX
UNITS
NOTES
Current during SNOOZE MODE
ZZ
≥ VIH
ISB2Z
10
m A
ZZ active to input ignored
tZZ
0
2(tKHKH)
ns
1
ZZ inactive to input sampled
tRZZ
0
2(tKHKH)
ns
1
ZZ active to snooze current
tZZI
2(tKHKH)
ns
1
ZZ inactive to exit snooze current
tRZZI
0
ns
1
SNOOZE MODE WAVEFORM
t
ZZ
I
SUPPLY
CLK
ZZ
t
RZZ
ALL INPUTS
(except ZZ)
DON’T CARE
I
ISB2Z
t
ZZI
t
RZZI
Outputs (Q)
High-Z
DESELECT or READ Only
NOTE: 1. This parameter is sampled.
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