adsp-21364bbc Analog Devices, Inc., adsp-21364bbc Datasheet - Page 45

• Manufacturer Part Number: adsp-21364bbc
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

OUTPUT DRIVE CURRENTS
Figure 37
ers of the ADSP-2136x. 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 in
Table 15 on Page 21
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
sured between the point that the first signal reaches 1.5 V and
the point that the second signal reaches 1.5 V.
O UTPUT
PIN
TO
- 20
- 30
- 40
- 10
Figure 38. Equivalent Device Loading for AC Measurements
40
30
20
10
OUTPUT
Figure 39. Voltage Reference Levels for AC Measurements
0
INPUT
0
shows typical I-V characteristics for the output driv-
OR
Figure
V OL
0.5
1.5V
Figure 37. ADSP-2136x Typical Drive
Figure
39. All delays (in nanoseconds) are mea-
3.47V, - 45°C
through
SWEEP (V
1.0
(Includes All Fixtures)
38.
3.11V, +125°C
1.5
30pF
DDEXT
Table 41 on Page
ADSP-21362/ADSP-21363/ADSP-21364/ADSP-21365/ADSP-21366
) VOLTAGE (V)
V OH
2.0
3.11V, +125°C
50
2.5
3.3V, +25°C
44. These include
3.0
3.47V, - 45°C
3.3V, +25°C
Rev. D | Page 45 of 56 | April 2008
3.5
1.5V
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% to 80%,
V = Min) vs. Load Capacitance.
12
10
0
8
6
4
2
12
10
Figure
8
6
4
2
0
0
0
Figure 40. Typical Output Rise/Fall Time
Figure 41. Typical Output Rise/Fall Time
40,
y = 0.0467x + 1.6323
50
y = 0.049x + 1.5105
Figure
(20% to 80%, V
(20% to 80%, V
50
Figure
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
41, and
38).
100
100
y = 0.0482x + 1.4604
y = 0.045x + 1.524
Figure 42
DDEXT
DDEXT
Figure 42
= Max)
= Min)
RISE
150
150
RISE
shows graphically
FALL
FALL
may not be linear
200
200
250
250