MC-45V16AD641 Datasheet, PDF (9/16 Pages) NEC – 16M-WORD BY 64-BIT VirtualChannel SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE

MC-45V16AD641
5 AC characteristics (Background to Background operation)
Parameter
Symbol
-A 75
-A 10
Unit Notes
MIN. MAX. MIN. MAX.
Same Bank Operation
ACT to ACT/REF Command period
tRC
67.5
−
80
−
ns
REF to REF/ ACT Command period
tRCF
67.5
−
80
−
ns
ACT to PRE Command period
tRAS
52 120,000 60 120,000 ns
PRE to ACT / REF Command period
tRP
20
−
20
−
ns
ACT to PFC/PFCA/ PPF/PPFA Command delay time
tAPD
15
−
20
−
ns
ACT to PFR Command delay time (Prefetch Read Operation) tAPRD
20
−
20
−
ns
PFC to PRE Command delay time
tPPL
22.5
−
30
−
ns
PFCA / PFR to ACT/REF Command delay time
tPAL
45
−
50
−
ns
PPF to PRE Command delay time
tPPP
45
−
60
−
ns
PPFA to ACT/REF Command delay time
RST / RSTA to ACT(R) ^Note1 Command delay time
tPPA
67.5
−
80
−
ns
tRAD
7.5
30
10
40
ns
2
Same, Other Bank Operation
ACT(R) ^Note1 to PFC/PFCA/PFR/ PPF/PPFA
Command delay time
PFC to PFC / PFCA Command delay time
PPF to PPF / PPFA Command delay time
tRPD
37.5
−
40
−
ns
tPPD
22.5
−
30
−
ns
tPPPD
45
−
60
−
ns
Other Bank Operation
ACT to ACT/ACT(R) or ACT(R) to ACT Command delay time tRRD
15
−
20
−
ns
ACT(R) to ACT(R) Command delay time
tRRDR
30
−
40
−
ns
PFC /PFCA to RST /RSTA Command delay time
tPRD
22.5
−
30
−
ns
PPF /PPFA to RST /RSTA Command delay time
tPPRD
45
−
60
−
ns
Notes 1. ACT (R) command is ACT command after RST command.
2. The another background operation and same channel foreground operation are illegal while tRAD period.
Data Sheet M13823EJ6V0DS00
9