MT46V16M16BG-75 データシートの表示（PDF） - Micron Technology
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MT46V16M16BG-75 Datasheet PDF : 80 Pages
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256Mb: x4, x8, x16
DDR SDRAM
Figure 45: Power-Down Mode
T0
T1
T2
Ta0
Ta1
Ta2
CK#
((
))
CK
((
tCK
tCH tCL ) )
CKE1
COMMAND
ADDR
tIS tIH
tIS tIH
VALID2
tIS tIH
VALID
tIS
NOP
DQS
DQ
DM
Enter3
Power-Down
Mode
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
tREFC
tIS
NOP
VALID
VALID
Exit
Power-Down
Mode
DON’T CARE
NOTE:
1. Once initialized, VREF must always be powered within the specified range.
2. If this command is a PRECHARGE (or if the device is already in the idle state), then the power-down mode shown is pre-
charge power-down. If this command is an ACTIVE (or if at least one row is already active), then the power-down mode
shown is active power-down.
3. No column accesses are allowed to be in progress at the time power-down is entered.
SYMBOL
tCH
tCL
tCK (2.5)
-6/6T/6T
MIN MAX
0.45 0.55
0.45 0.55
6
13
-75E/75Z
MIN MAX
0.45 0.55
0.45 0.55
7.5 13
-75
MIN MAX
0.45 0.55
0.45 0.55
7.5
13
UNITS
tCK
tCK
ns
SYMBOL
tCK (2)
tIHS
tISS
-6/6T/6T
MIN MAX
7.5 13
0.8
0.8
-75E/75Z
MIN MAX
7.5 13
1
1
-75
MIN MAX
10
13
1
1
UNITS
ns
ns
ns
09005aef8076894f
256MBDDRx4x8x16_2.fm - Rev. F 6/03 EN
70
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2003 Micron Technology, Inc.
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