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| 型號(hào)： | TMS320AV420 |
| 英文描述： | Color Encoder Circuit |
| 中文描述： | 顏色編碼器電路 |
| 文件頁(yè)數(shù)： | 80/132頁(yè) |
| 文件大小： | 1707K |
| 代理商： | TMS320AV420 |
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SPRS145G
–
JULY 2000
–
REVISED FEBRUARY 2002
80
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
–
1443
PARAMETER MEASUREMENT INFORMATION
Tester Pin
Electronics
VLOAD
IOL
CT
IOH
Output
Under
Test
50
Where:
IOL
IOH
VLOAD
CT
=
=
=
=
2 mA (all outputs)
300
μ
A (all outputs)
1.5 V
50-pF typical load-circuit capacitance
Figure 22. Test Load Circuit
signal transition levels
The data in this section is shown for the 3.3-V version. Note that some of the signals use different reference
voltages, see the recommended operating conditions table. Output levels are driven to a minimum logic-high
level of 2.4 V and to a maximum logic-low level of 0.8 V.
Figure 23 shows output levels.
0.4 V (VOL)
20%
2.4 V (VOH)
80%
Figure 23. Output Levels
Output transition times are specified as follows:
For a
high-to-low
transition
, the level at which the output is said to be no longer high is below 80% of the
total voltage range and lower and the level at which the output is said to be low is 20% of the total voltage
range and lower.
For a
low-to-high transition
, the level at which the output is said to be no longer low is 20% of the total voltage
range and higher and the level at which the output is said to be high is 80% of the total voltage range and
higher.
Figure 24 shows the input levels.
0.8 V (VIL)
10%
2.0 V (VIH)
90%
Figure 24. Input Levels
Input transition times are specified as follows:
For a
high-to-low transition
on an input signal, the level at which the input is said to be no longer high is 90%
of the total voltage range and lower and the level at which the input is said to be low is 10% of the total voltage
range and lower.
For a
low-to-high transition
on an input signal, the level at which the input is said to be no longer low is 10%
of the total voltage range and higher and the level at which the input is said to be high is 90% of the total
voltage range and higher.
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