AS4C128M16D3A-12BIN
max
Internal READ Command to
PRECHARGE Command delay
(4nCK,
7.5ns)
max
(4nCK,
7.5ns)
-
tRTP
Delay from start of internal write
transaction to internal read command
-
tWTR
15
4
-
-
WRITE recovery time
tWR
ns
Mode Register Set command cycle time
tMRD
tCK
Max
(12nCK,
15ns)
-
-
Mode Register Set command update delay
tMOD
4
CAS# to CAS# command delay
tCCD
tCK
tCK
tCK
WR + tRP
Auto precharge write recovery + prechargetime
Multi-Purpose Register Recovery Time
tDAL(min)
tMPRR
1
-
-
max
(4nCK,
7.5ns)
ACTIVE to ACTIVE command period
Four activate window
tRRD
tFAW
40
45
170
-
-
-
-
-
ns
ps
ps
ps
AC175
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
tIS(base)
AC150
AC135
Command and Address hold time from CK,
CK# referenced to Vih(dc) / Vil(dc) levels
Control and Address Input pulse width for
each input
120
560
-
-
DC100
tIH(base)
tIPW
ps
ps
512
256
64
-
-
-
Power-up and RESET calibration time
Normal operation Full calibration time
Normal operation Short calibration time
tZQinit
tZQoper
tZQCS
tCK
tCK
tCK
Max
(5nCK,
-
-
Exit Reset from CKE HIGH to a valid command
tXPR
tRFC
+
10ns)
Max
(5nCK,
Exit Self Refresh to commands not
requiring a locked DLL
tXS
tXSDLL
tCKESR
tCKSRE
tCKSRX
tRFC
+
10ns)
tDLLK
(min)
Exit Self Refresh to commands requiring a
locked DLL
-
-
tCK
tCKE
(min) +
1 nCK
Max
(5 nCK,
10ns)
Max
Minimum CKE low width for Self Refresh
entry to exit timing
Valid Clock Requirement after Self Refresh Entry (SRE)
or Power-Down Entry (PDE)
-
-
Valid Clock Requirement before Self Refresh Exit (SRX)
or Power-Down Exit (PDX) or Reset Exit
(5 nCK,
10ns)
Exit Power Down with DLL on to any valid command;
Exit Precharge Power Down with DLL frozen to
commands not requiring a locked DLL
Max
(3 nCK,
6ns)
-
-
tXP
Max
(10nCK,
24 ns)
Max
(3 nCK,
5ns)
Exit Precharge Power Down with DLL
frozen to commands requiring a lockedDLL
tXPDLL
tCKE
-
-
CKE minimum pulse width
1
Command pass disable delay
tCPDED
tPD
tACTPDEN
tPRPDEN
tCK
tCKE
(min)
9 *
tREFI
Power Down Entry to Exit Timing
1
-
Timing of ACT command to Power Down entry
tCK
tCK
Timing of PRE or PREA command to
Power Down entry
1
-
RL + 4 +
1
-
Timing of RD/RDA command to Power Down entry
tRDPDEN
tCK
Confidential
-27／83-
Rev. 1.0 May 2016
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
