46DR83200A Datasheet, PDF (16/48 Pages) Integrated Silicon Solution, Inc – 32Mx8, 16Mx16 DDR2 DRAM

IS43/46DR83200A, IS43/46DR16160A
Electrical Characteristics & AC Timing Specifications
Refresh parameters (TOPER; VDDQ = 1.8 V +/- 0.1 V; VDD = 1.8 V +/- 0.1 V)
Parameter
Refresh to active/Refresh command time
tRFC
Average periodic refresh interval
tREFI
Symbol
-40^oC ≤ Tc < 0^oC
0^oC ≤ Tc ≤ 85^oC
85^oC < Tc ≤ 95^oC
95^oC < Tc ≤ 105^oC
Units Notes
75
ns 1
7.8
ms 1,2
7.8
ms 1
3.9
ms 1,2
3.9
ms 1,2,3
Notes:
1. If refresh timing is violated, data corruption may occur and the data must be re-written with valid data before a valid READ can be executed.
2. Specified for Industrial and Automotive grade only; not applicable for Commercial grade. Toper may not be violated.
3. Specified for Automotive grade (A2) only; not applicable for any other grade. Toper may not be violated.
Key Timing Parameters by Speed Grade
-25E
-3D
-37C
-5B
Speed bin (JEDEC) DDR2-800E DDR2-667D DDR2-533C DDR2-400B
CL-tRCD-tRP
6-6-6
5-5-5
4-4-4
3-3-3
tRCD
15
15
15
15
tRP
15
15
15
15
tRC
60
60
60
55
tRAS
45
45
45
40
tCK(avg)@CL=3
5
5
5
5
tCK(avg)@CL=4
3.75
3.75
3.75
5
tCK(avg)@CL=5
3
3
–
–
tCK(avg)@CL=6
2.5
–
–
–
Notes:
1. Speed grade options -37C, -3D, and -25E are backward compatible with all the timing specifications for slower grades.
16
Integrated Silicon Solution, Inc. — www.issi.com
Rev. D
08/16/2012