ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
30
25
20
15
10
5
6
5
4
3
2
1
RISE TIME
RISE/FALL TIME
FALL TIME
0
0
0
50
100
150
200
250
0
10
20
30
40
50
60
70
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
Figure 78. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver C at VDDEXT = 2.25 V
Figure 81. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver D DDR SDRAM at VDDDDR= 2.7V
20
4
18
16
3.5
3
RISE TIME
RISE/FALL TIME
2.5
14
12
2
1.5
1
FALL TIME
10
8
6
4
2
0
.5
0
0
10
20
30
40
50
60
70
LOAD CAPACITANCE (pF)
Figure 82. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver D Mobile DDR SDRAM at VDDDDR = 1.8V
0
50
100
150
200
250
LOAD CAPACITANCE (pF)
Figure 79. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver C at VDDEXT = 3.65 V
4
3.5
3
6
5
RISE/FALL TIME
2.5
2
1.5
1
4
RISE/FALL TIME
3
2
.5
0
0
10
20
30
40
50
60
70
1
0
LOAD CAPACITANCE (pF)
Figure 83. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver D Mobile DDR SDRAM at VDDDDR = 1.95V
0
10
20
30
40
50
60
70
LOAD CAPACITANCE (pF)
Figure 80. Typical Rise and Fall Times (10% to 90%) vs. Load Capacitance for
Driver D DDR SDRAM at VDDDDR= 2.5V
Rev. C
|
Page 90 of 100
|
February 2010
ADI [ ADI ]
