MT40A2G4PM-083E Datasheet, PDF (351/373 Pages) Micron Technology – Programmable data strobe preambles

Table 159: Electrical Characteristics and AC Timing Parameters: DDR4-1600 through DDR4-2400 (Continued)
DDR4-1600
DDR4-1866
DDR4-2133
DDR4-2400
Parameter
Symbol
Min Max Min Max Min Max Min Max
ACTIVATE-to-ACTIVATE command period
to same bank groups for 1/2KB page size
t_{RRD_L}
(1/2KB)
MIN = greater MIN = greater MIN = greater MIN = greater
of 4CK or 6ns of 4CK or 5.3ns of 4CK or 5.3ns of 4CK or 4.9ns
ACTIVATE-to-ACTIVATE command period
to same bank groups for 1KB page size
t_{RRD_L}
(1KB)
MIN = greater MIN = greater MIN = greater MIN = greater
of 4CK or 6ns of 4CK or 5.3ns of 4CK or 5.3ns of 4CK or 4.9ns
ACTIVATE-to-ACTIVATE command period
to same bank groups for 2KB page size
t_{RRD_L}
(2KB)
MIN = greater MIN = greater MIN = greater MIN = greater
of 4CK or 7.5ns of 4CK or 6.4ns of 4CK or 6.4ns of 4CK or 6.4ns
Four ACTIVATE windows for 1/2KB page
size
t_FAW
(1/2KB)
MIN = greater MIN = greater MIN = greater MIN = greater
of 16CK or 20ns of 16CK or 17ns of 16CK or 15ns of 16CK or 13ns
Four ACTIVATE windows for 1KB page
size
t_FAW
(1KB)
MIN = greater MIN = greater MIN = greater MIN = greater
of 20CK or 25ns of 20CK or 23ns of 20CK or 21ns of 20CK or 21ns
Four ACTIVATE windows for 2KB page
size
t_FAW
(2KB)
MIN = greater MIN = greater MIN = greater MIN = greater
of 28CK or 35ns of 28CK or 30ns of 28CK or 30ns of 28CK or 30ns
WRITE recovery time
t_WR
MIN = 15ns
WRITE recovery time when CRC and DM
are both enabled
t_WR2
t_{WR_CRC_DM}
MIN = ^tWR +
greater of (4CK
or 3.75ns)
MIN = 1CK + ^tWR
MIN = ^tWR + greater of (5CK or 3.75ns)
Delay from start of internal WRITE trans-
action to internal READ command – Same
bank group
t_{WR_CRC_DM2}
t_{WTR_L}
t_{WTR_L2}
MIN = 1CK + ^tWR_CRC_DM
MIN = greater of 4CK or 7.5ns
MIN = 1CK + ^tWTR_L
Delay from start of internal WRITE trans- ^tWTR_L_CRC_D MIN = ^tWTR_L +
action to internal READ command – Same
M
greater of (4CK
bank group when CRC and DM are both
or 3.75ns)
enabled
t_{WTR_L_CRC_D}
M₂
Delay from start of internal WRITE trans-
t_{WTR_S}
action to internal READ command – Dif-
ferent bank group
t_{WTR_S2}
MIN = ^tWTR_L + greater of (5CK or 3.75ns)
MIN = 1CK + ^tWTR_L_CRC_DM
MIN = greater of (2CK or 2.5ns)
MIN = 1CK + ^tWTR_S
Unit
CK
CK
CK
ns
ns
ns
ns
CK
CK
CK
CK
CK
CK
CK
CK
CK
Notes
1
1
1
6, 10, 1
6, 11, 1
7, 10, 1
7, 11, 1
6, 10, 1
6, 11, 1
7, 10, 1
7, 11, 1
6, 8, 9,
10, 1
6, 8, 9,
11, 1