MC-458CB642XS Datasheet, PDF (9/14 Pages) Elpida Memory – 8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE (SO DIMM)

MC-458CB642XS
Asynchronous Characteristics
Parameter
Symbol
-A75
Unit Note
MIN.
MAX.
ACT to REF/ACT command period (Operation)
tRC
67.5
ns
REF to REF/ACT command period (Refresh)
tRC1
67.5
ns
ACT to PRE command period
PRE to ACT command period
Delay time ACT to READ/WRITE command
ACT (one) to ACT (another) command period
E_{Data-in to PRE command}
/CAS latency = 3
period
/CAS latency = 2
Data-in to ACT (REF) command /CAS latency = 3
Operiod (Auto precharge)
/CAS latency = 2
Mode register set cycle time
Transition time
L ^{Refresh time (4,096 refresh cycles)}
tRAS
tRP
tRCD
tRRD
tDPL3
tDPL2
tDAL3
tDAL2
tRSC
tT
tREF
45
20
20
15
8
8
1CLK+22.5
1CLK+20
2
0.5
120,000
30
64
ns
ns
ns
ns
ns
ns
ns
1
ns
CLK
ns
ms
Product ^{Note 1. This device can satisfy the tDAL3 spec of 1CLK+20 ns for up to and including 125 MHz operation.}
Data Sheet E0115N20
9