adsp-bf538f Analog Devices, Inc., adsp-bf538f Datasheet - Page 49

• Manufacturer Part Number: adsp-bf538f
• Description: Blackfin Embedded Processor
• Manufacturer: Analog Devices, Inc.

Capacitive Loading
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see
(nominal) = 3.0 V/3.3 V.
Page 51
tance. The delay and hold specifications given should be derated
by a factor derived from these figures. The graphs in these fig-
ures may not be linear outside the ranges shown.
Figure 42. Typical Output Rise and Fall Times (10% to 90%) vs. Load Capaci-
Figure 43. Typical Output Rise and Fall Times (10% to 90%) vs. Load Capaci-
14
12
10
12
10
8
6
4
2
0
8
6
4
2
0
0
0
show how output rise and fall times vary with capaci-
tance for Driver A at V
tance for Driver A at V
50
50
Figure
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
Figure 42
41). V
100
100
RISE TIME
RISE TIME
DDEXT
DDEXT
LOAD
through
= 3.6 V (Max)
= 2.7 V (Min)
is 1.5 V for V
150
150
Figure 51 on
FALL TIME
FALL TIME
Rev. A | Page 49 of 56 | January 2008
200
200
DDEXT
250
250
Figure 44. Typical Output Rise and Fall Times (10% to 90%) vs. Load Capaci-
Figure 45. Typical Output Rise and Fall Times (10% to 90%) vs. Load Capaci-
12
10
10
8
6
4
2
0
9
8
7
6
5
4
3
2
1
0
0
0
tance for Driver B at V
tance for Driver B at V
ADSP-BF538/ADSP-BF538F
50
50
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
100
100
RISE TIME
RISE TIME
DDEXT
DDEXT
= 3.6 V (Max)
= 2.7 V (Min)
150
150
FALL TIME
FALL TIME
200
200
250
250