ADSP-21363SBBC-ENG AD [Analog Devices], ADSP-21363SBBC-ENG Datasheet - Page 36

• Manufacturer Part Number: ADSP-21363SBBC-ENG
• Description: SHARC Processor
• Manufacturer: AD [Analog Devices]

ADSP-21363
OUTPUT DRIVE CURRENTS
Figure 28
ers of the ADSP-21363. The curves represent the current drive
capability of the output drivers as a function of output voltage.
TEST CONDITIONS
The ac signal specifications (timing parameters) appear
Table 12 on Page 19
output disable time, output enable time, and capacitive loading.
The timing specifications for the SHARC apply for the voltage
reference levels in
Timing is measured on signals when they cross the 1.5 V level as
described in
are measured between the point that the first signal reaches
1.5 V and the point that the second signal reaches 1.5 V.
OUTPUT
INPUT
OR
OUTPUT
-20
-30
-40
-10
Figure 29. Equivalent Device Loading for AC Measurements
40
30
20
10
Figure 30. Voltage Reference Levels for AC Measurements
PIN
0
TO
0
shows typical I-V characteristics for the output driv-
1.5V
Figure 30 on Page
V OL
0.5
Figure 28. ADSP-21363 Typical Drive
Figure
3.47V, -45° C
SWEEP (V DDEXT ) VOLTAGE (V)
through
1
(Includes All Fixtures)
29.
3.11V, 125° C
1.5
30pF
Table 32 on Page
36. All delays (in nanoseconds)
V OH
2
3.11V, 125° C
50
2.5
3.3V, 25° C
3
35. These include
Rev. PrA | Page 36 of 44 | September 2004
1.5V
3.3V, 25° C
3.47V, -45° C
3.5
1.5V
CAPACITIVE LOADING
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see
how output delays and holds vary with load capacitance. The
graphs of
outside the ranges shown for Typical Output Delay vs. Load
Capacitance and Typical Output Rise Time (20%-80%, V=Min)
vs. Load Capacitance.
12
10
0
8
6
4
2
12
10
Figure
8
4
6
2
0
Figure 31. Typical Output Rise/Fall Time (20%-80%,
Figure 32. Typical Output Rise/Fall Time (20%-80%,
0
0
31,
Preliminary Technical Data
y = 0.0467x + 1.6323
50
Figure
y = 0.049x + 1.5105
50
Figure
LOAD CAPACITANCE (pF)
V
LOAD CAPACITANCE (pF)
V
32, and
DDEXT
DDEXT
29).
100
100
y = 0.045x + 1.524
= Max)
y = 0.0482x + 1.4604
= Min)
Figure 33
Figure 33
RISE
150
150
RISE
shows graphically
FALL
FALL
may not be linear
200
200
250
250