EtronTech
EM636327
Electrical Characteristics and Recommended A.C. Operating Conditions
¡ Ó
(VDD = 3.3V
0.3V, Ta = 0~70 C) (Note: 5, 6, 7, 8)
°
- 55/6/7/8/10
Symbol
A.C. Parameter
Min.
Max.
Unit
Note
tRC
Row cycle time
(same bank)
48/54/63/72/90
9
tRCD
RAS# to CAS# delay
(same bank)
16/16/16/16/30
9
tRP
Precharge to refresh/row activate command
(same bank)
16/16/16/16/30
11/12/14/16/20
9
9
tRRD
Row activate to row activate delay
(different banks)
tRAS
Row activate to precharge time
(same bank)
32/36/42/48/60
100,000
ns
tWR
tCK1
tCK2
tCK3
tCH
Write recovery time
5.5/6/7/8/10
19/20/20/20/30
7/7.5/8/8/15
5.5/6/7/8/10
2/2/2.5/3/3.5
2/2/2.5/3/3.5
CL* = 1
10
Clock cycle time
CL* = 2
CL* = 3
11
11
Clock high time
Clock low time
tCL
tAC1
tAC2
tAC3
tCCD
tOH
Access time from CLK
(positive edge)
CL* = 1
CL* = 2
CL* = 3
7/8/13/18/27
5.5/6/6.5/7/12
5/5/5.5/6.5/7.5
11
10
CAS# to CAS# Delay time
Data output hold time
1
Cycle
2/2/2/2/3
1/1/1/2/2
tLZ
Data output low impedance
Data output high impedance
tHZ
3.5/4/5/6/8
8
tIS
Data/Address/Control Input set-up time
Data/Address/Control Input hold time
Minimum CKE "High" for SelfRefresh exit
PowerDown Exit set-up time
2/2/2/2.5/3
1
11
11
tIH
tSRX
tPDE
tRSC
tBWC
tBPL
tREF
ns
5.5/6/7/8/10
3.5/4/5/6/8
5.5/6/7/8/10
11/12/14/16/20
11/12/14/16/20
11
9
(Special) Mode Register Set Cycle time
Block Write Cycle time
Block Write to Precharge command period
Refresh time
32
ms
* CL is CAS# Latency.
Preliminary
1998
December
21
ETRON [ ETRON TECHNOLOGY, INC. ]
