MT47H64M16BT-37EA Datasheet, PDF (40/134 Pages) Micron Technology – DDR2 SDRAM

Table 12: AC Operating Specifications and Conditions (Continued)
Not all speed grades listed may be supported for this device; refer to the title page for speeds supported; Notes: 1–5 apply to the entire table;
V_DDQ = +1.8V ±0.1V, V_DD = +1.8V ±0.1V
AC Characteristics
-187E
-25E
-25
-3E
-3
-37E
-5E
Parameter
Symbol Min Max Min Max Min Max Min Max Min Max Min Max Min Max Units Notes
ODT to power-
t_ANPD
4
–
3
–
3
–
3
–
3
–
3
–
3
–
t_CK
18
down entry latency
ODT power-down ^tAXPD 11
–
10
–
10
–
8
–
8
–
8
–
8
–
t_CK
18
exit latency
ODT turn-on delay ^tAOND
2
t_CK
18
ODT turn-off delay ^tAOFD
2.5
t_{CK 18, 45}
ODT turn-on
t_AON
t_AC t_AC
MIN = ^tAC (MIN)
MIN = ^tAC (MIN)
MIN = ^tAC (MIN)
ps 19, 46
(MIN) (MAX) MAX = ^tAC (MAX) + 600 MAX = ^tAC (MAX) + 700 MAX = ^tAC (MAX) + 1,000
+
2,575
ODT turn-off
t_AOF
MIN = ^tAC (MIN)
MAX = ^tAC (MAX) + 600
ps 47, 48
ODT turn-on
(power-down
mode)
t_AONPD
t_AC
(MIN)
+
2,000
2×
t_{CK +}
t_AC
(MAX)
+
1,000
MIN = ^tAC (MIN) + 2,000
MAX = 2 × ^tCK + ^tAC (MAX) + 1,000
ps
49
ODT turn-off
t_AOFPD
MIN = ^tAC (MIN) + 2,000
ps
(power-down
MAX = 2.5 × ^tCK + ^tAC (MAX) + 1,000
mode)
ODT enable from
MRS command
t_MOD
MIN = 12
MAX = n/a
ns 18, 50