EM639165 Etron Technology Inc., EM639165 Datasheet - Page 31

• Manufacturer Part Number: EM639165
• Description: 8Mega x 16bits SDRAM
• Manufacturer: Etron Technology Inc.

Preliminary
AC TIMING REQUIREMENTS
(Ta=0 - 70˚C, VDD=VDDQ=3.3±0.3V,VSS=VSSQ=0V, unless otherwise noted)
Input Pulse Levels:0.8V-2.0V
Input Timing Measurement Level:1.4V
Symbol
tRCD
tRRD
tCLK
tRAS
tRSC
tREF
tWR
tRFC
tCH
tRC
tRP
tCL
tIS
tIH
tT
CLK
DQ
Refresh Cycle Time
CLK cycle time
CLK High pulse width
CLK Low pulse width
Transition time of CLK
Input Setup time
Input Hold time
Row Cycle time
Row to Column Delay
Row Active time
Row Precharge time
Write Recovery time
Act to Act Delay time
Mode Register Set Cycle time
Refresh Interval time
Parameter
(all inputs)
(all inputs)
CL=2
CL=3
31
Min.
67.5
1.8
1
75
20
45
20
15
15
15
7.5
2.5
2.5
10
1
1.4V
1.4V
-75
Max.
100K
10
64
Any AC timing is referenced
to the input signal passing
through 1.4V.
Min.
20
20
10
48
20
20
20
70
80
3
3
1
8
2
1
-8
Rev 1.0
Max.
EM639165
100K
10
64
Feb. 2001
Unit
n
n
ns
ns
ns
ns
ns
ms
ns
ns
n
ns
ns
ns
ns
ns
s
s
s