Datasheet

9
Speed
DDR4 2133
Unit
Parameter
Symbol
Min
Max
CAS_n to CAS_n command delay for
different bank group
tCCD_S
4
-
nCK
Auto precharge write recovery + precharge
time
tDAL
tWR+tRP/tCK
nCK
ACTIVATE to ACTIVATE Command delay to
different bank group for 2KB page size
tRRD_S(2K)
Max(4nCK,5.3ns)
-
nCK
ACTIVATE to ACTIVATE Command delay to
different bank group for 1KB page size
tRRD_S(1K)
Max(4nCK,3.7ns)
-
nCK
ACTIVATE to ACTIVATE Command delay to
different bank group for 1/ 2KB page size
tRRD_S
(1/ 2K)
Max(4nCK,3.7ns)
-
nCK
ACTIVATE to ACTIVATE Command delay to
same bank group for 2KB page size
tRRD_L(2K)
Max(4nCK,6.4ns)
-
nCK
ACTIVATE to ACTIVATE Command delay to
same bank group for 1KB page size
tRRD_L(1K)
Max(4nCK,5.3ns)
-
nCK
ACTIVATE to ACTIVATE Command delay to
same bank group for 1/2KB page size
tRRD_L
(1/ 2K)
Max(4nCK,5.3ns)
-
nCK
Four activate window for 2KB page size
tFAW_2K
Max(28nCK, 30ns)
-
ns
Four activate window for 1KB page size
tFAW_1K
Max(20nCK, 21ns)
-
ns
Four activate window for 1/2KB page size
tFAW_1/2K
Max(16nCK, 15ns)
-
ns
Power-up and RESET calibration time
tZQinit
1024
-
nCK
Normal operation Full calibration time
tZQoper
512
-
nCK
Normal operation short calibration time
tZQCS
128
-
nCK
Exit Self Refresh to commands not re-quiring
a locked DLL
tXS
tRFC(min)+ 10ns
-
Exit Self Refresh to commands requir-ing a
locked DLL
tXSDLL
tDLLK(min)
-
Internal READ Command to PRE-CHARGE
Command delay
tRTP
Max(4nCK,7.5ns)
-
Minimum CKE low width for Self re-fresh
entry to exit timing
tCKESR
tCKE(min)+1nCK
-
Exit Power Down with DLL on to any valid
command;Exit Precharge Power Down with
DLL frozen to commands not requiring a
locked DLL
tXP
Max (4nCK,6ns)
-
CKE minimum pulse width
tCKE
Max (3nCK,5ns)
-
Asynchronous RTT turn-on delay
(Power-Down with DLL frozen)
tAONAS
1.0
9.0
ns
Asynchronous RTT turn-off delay
(Power-Down with DLL frozen)
tAOFAS
1.0
9.0
ns
RTT dynamic change skew
tADC
0.3
0.7
tCK