50S116T
SDRAM
AC Characteristics
(VCC = 3.3V ±0.3V, VSS = 0V, TA = 0 to 70 °C, Notes: 5, 6, 7, 8)
PARAMETER
SYM.
-5
-6
-7
UNIT
MIN.
54
40
15
1
MAX.
MIN.
60
42
18
1
MAX.
MIN.
65
45
20
1
MAX.
Ref/Active to Ref/Active Command Period
Active to Precharge Command Period
tRC
nS
tRAS
100000
100000
100000
Active to Read/Write Command Delay Time tRCD
Read/Write(a) to Read/Write(b)Command
Period
tCCD
Cycle
nS
Precharge to Active(b) Command Period
Active(a) to Active(b) Command Period
tRP
tRPD
tWR
15
10
7
18
12
8
20
14
10
7
Write Recovery Time
CL* = 2
CL* = 3
CL* = 2
CL* = 3
5
6
CLK Cycle Time
tCK
7
1000
1000
8
1000
1000
10
7
1000
1000
5
6
CLK High Level Width
CLK Low Level Width
Access Time from CLK
tCH
tCL
tAC
2
2
2.5
2.5
2
2
CL* = 2
CL* = 3
5.5
6
6.5
4.5
5
5.5
Output Data Hold Time
tOH
tHZ
1.8
1.5
1
2
2
2.5
2.5
1
Output Data High Impedance Time
Output Data Low Impedance Time
Power-down Mode Entry Time
5
6
7
tLZ
1
tSB
1
5
1
6
1
7
Transition Time of CLK (Rise and Fall)
Data-in-Set-up Time
Data-in Hold Time
tT
0.5
1.5
1
10
0.5
1.5
1
10
0.5
1.5
1
10
tDS
tDH
Address Set-up Time
Address Hold Time
tAS
1.5
1
1.5
1
1.5
1
tAH
CKE Set-up Time
tCKS
tCKH
tCMS
tCMH
tREF
tRSC
1.5
1
1.5
1
1.5
1
CKE Hold Time
Command Set-up Time
Command Hold Time
Refresh Time
1.5
1
1.5
1
1.5
1
64
64
64
mS
nS
Mode Register Set Cycle Time
10
12
14
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C
Tel:886-3-3214525
Email: server@ceramate.com.tw
Http: www.ceramate.com.tw
Rev 1.0 Aug.20,2002
Page 15 of 42
Fax:886-3-3521052
CERAMATE [ CERAMATE TECHNICAL ]
