KM416L8031BT-GL0 View Datasheet(PDF) - Samsung
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KM416L8031BT-GL0 Datasheet PDF : 53 Pages
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128Mb DDR SDRAM
11.2 Half strength driver
1. The nominal pulldown V-I curve for DDR SDRAM devices will be within the inner bounding lines of the V-I curve of Figure a.
2. The full variation in driver pulldown current from minimum to maximum process, temperature and voltage will lie within the outer
bounding lines the of the V-I curve of Figure a.
90
80
Maximum
70
60
Typical High
50
40
Typical Low
30
Minimum
20
10
0
0.0
1.0
2.0
Vout(V)
3. Thenominal pullup V-I curve for DDR SDRAM devices will be within the inner bounding lines of the V-I curve of below Figure b.
4. The Full variation in driver pullup current from minimum to maximum process, temperature and voltage will lie within the outer
bounding lines of the V-I curve of Figrue b.
0.0
0.5
1.0
1.5
2.0
2.5
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
Minumum
Typical Low
Typical High
Maximum
Vout(V)
5. The full variation in the ratio of the maximum to minimum pullup and pulldown current will not exceed 1.7, for device drain to source
voltage from 0 to VDDQ/2
6. The Full variation in the ratio of the nominal pullup to pulldown current should be unity ±10%, for device drain to source voltages
from 0 to VDDQ/2
Figure 26. I/V characteristics for input/output buffers:Pull up(above) and pull down(below)
- 49 -
REV. 1.0 November. 2. 2000
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