參數(shù)資料
型號: TMS320C44PDB-60
英文描述: DSP|32-BIT|CMOS|QFP|304PIN|PLASTIC
中文描述: 數(shù)字信號處理器| 32位|的CMOS | QFP封裝| 304PIN |塑料
文件頁數(shù): 80/132頁
文件大?。?/td> 1707K
代理商: TMS320C44PDB-60
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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