M52S128168A_08 Datasheet, PDF (5/47 Pages) Elite Semiconductor Memory Technology Inc. – 2M x 16 Bit x 4 Banks Synchronous DRAM

ESMT
AC OPERATING TEST CONDITIONS (VDD=2.5V ± 0.2V,TA= 0 °C ~ 70 °C )
Parameter
Input levels (Vih/Vil)
Input timing measurement reference level
Input rise and fall time
Output timing measurement reference level
Output load condition
Value
0.9 x VDDQ / 0.2
0.5 x VDDQ
tr / tf = 1 / 1
0.5 x VDDQ
See Fig.2
M52S128168A
Unit
V
V
ns
V
OPERATING AC PARAMETER
(AC operating conditions unless otherwise noted)
Parameter
Symbol
Row active to row active delay
RAS to CAS delay
Row precharge time
Row active time
Row cycle time
@Operating
@Auto refresh
Last data in to new col. Address delay
Last data in to row precharge
Last data in to burst stop
Col. Address to col. Address delay
Mode Register command to Active or Refresh Command
Number of valid output data
Refresh period(4,096 rows)
tRRD(min)
tRCD(min)
tRP(min)
tRAS(min)
tRAS(max)
tRC(min)
tRFC(min)
tCDL(min)
tRDL(min)
tBDL(min)
tCCD(min)
tMRD(min)
CAS latency=3
CAS latency=2
tREF(max)
Version
-7 -7.5 -10
14 15 20
14 15 20
14 15 20
42 48 50
100
63 67.5 90
80
1
2
1
1
2
2
1
64
Unit
ns
ns
ns
ns
us
ns
ns
CLK
CLK
CLK
CLK
CLK
ea
ms
Note
1
1
1
1
-
1
1,5
2
2
2
3
-
4
6
Note: 1. The minimum number of clock cycles is determined by dividing the minimum time required with clock cycle time and
then rounding off to the next higher integer.
3. Minimum delay is required to complete write.
4. All parts allow every cycle column address change.
5. In case of row precharge interrupt, auto precharge and read burst stop.
The earliest a precharge command can be issued after a Read command without the loss of data is CL+BL-2 clocks
5. A new command may be given tRFC after self refresh exit.
6. A maximum of eight consecutive AUTO REFRESH commands (with tRFCmin) can be posted to any given SDRAM,and
the maximum absolute interval between any AUTO REFRESH command and the next AUTO REFRESH command is
8x15.6μs.)
Elite Semiconductor Memory Technology Inc.
Publication Date: Dec. 2008
Revision: 1.2
5/47