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ECS2516AFCN-A Datasheet(PDF) 7 Page - Elpida Memory

Part # ECS2516AFCN-A
Description  256M bits SDRAM Bare Chip
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

ECS2516AFCN-A Datasheet(HTML) 7 Page - Elpida Memory

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ECS2516AFCN-A
Preliminary Data Sheet E0986E20 (Ver. 2.0)
7
AC Characteristics (TA = 0 to +85
°C, VDD, VDDQ = 3.3V ± 0.3V, VSS, VSSQ = 0V)
133MHz
Parameter
Symbol
min.
max.
Unit
Notes
System clock cycle time
(CL = 2)
tCK
10
ns
1
(CL = 3)
tCK
7.5
ns
1
CLK high pulse width
tCH
2.5
ns
1, 5
CLK low pulse width
tCL
2.5
ns
1, 5
Access time from CLK
tAC
5.4
1, 2, 5
Data-out hold time
tOH
3
ns
1, 2, 5
CLK to Data-out low impedance
tLZ
0
ns
1, 2, 3, 5
CLK to Data-out high impedance
tHZ
5.4
ns
1, 4
Input setup time
tSI
1.5
ns
1, 5
Input hold time
tHI
0.8
ns
1, 5
Ref/Active to Ref/Active command period
tRC
67.5
ns
1
Active to Precharge command period
tRAS
45
120000
ns
1
Active command to column command (same bank)
tRCD
20
ns
1
Precharge to active command period
tRP
20
ns
1
Write recovery or data-in to precharge lead time
tDPL
15
ns
1
Last data into active latency
tDAL
2CLK + 20ns
Active (a) to Active (b) command period
tRRD
15
ns
1
Transition time (rise and fall)
tT
0.5
5
ns
Refresh period
(8192 refresh cycles)
tREF
64
ms
Notes: 1. AC measurement assumes tT = 0.5ns. Reference level for timing of input signals is 1.4V.
2. Access time is measured at 1.4V. Load condition is CL = 50pF.
3. tLZ (min.) defines the time at which the outputs achieves the low impedance state.
4. tHZ (max.) defines the time at which the outputs achieves the high impedance state.
5. If tT ≥ 1ns, each parameters is changed as follows;
tAC, tOH, tLZ: should be added (tT (rise)/2 – 0.5)
tCH, tCL, tSI, tHI: should be added {(tT (rise) + tT (fall))/2 – 1}


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