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參數資料
| 型號： | MC44251FU |
| 廠商： | MOTOROLA INC |
| 元件分類： | ADC |
| 英文描述： | Triple 8-Bit Video ADC Three-State Outputs |
| 中文描述： | TRIPLE 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁數： | 3/18頁 |
| 文件大小： | 273K |
| 代理商： | MC44251FU |
MC44251
MOTOROLA
3
CLOCK INPUT
Symbol
Characteristic
Min
Max
Unit
VIH
VIL
IIL
IIH
RATE
Clock Input High Level
4.2
—
V
Clock Input Low Level
—
0.8
V
Low Level Input Current
—
±
2.0
μ
A
High Level Input Current
—
±
2.0
μ
A
Conversion Rate
—
18
ms/s
twL
twH
tr
tf
Clock Low Duration, Figure 1
27.5
—
ns
Clock High Duration, Figure 1
27.5
—
ns
Clock Rise Time (10% to 90%), Figure 1
—
15
ns
Clock Fall Time (10% to 90%), Figure 1
—
15
ns
HZ AND VTN INPUTS
Symbol
Characteristic
Min
Max
Unit
VIH
VIL
VHYS
IIL
IIH
tH
HZ and VTN Input Turn–On Threshold Voltage
0.56 x VDD
—
—
V
HZ and VTN Input Turn–Off Threshold Voltage
0.29 x VDD
0.17 x VDD
±
2.0
V
Hysteresis Voltage
0.11 x VDD
—
V
Low Level Input Current
μ
A
High Level Input Current
—
±
2.0
μ
A
HZ High Time, Figure 3
3
—
ns
CHIP SELECT INPUT
Symbol
Characteristic
Min
Max
Unit
VIH
VIL
IIN
Input High Level
3.5
—
V
Clamping Source Current
—
1.5
V
Input Leakage Current
—
±
2.0
μ
A
CLAMPING NETWORK
(Measured on R,G,B Inputs)
Symbol
Characteristic
Min
Max
Unit
Isink
Isource
DICL
Clamping Sink Current
2.0
5.0
μ
A
Clamping Source Current
– 5.0
– 2.0
μ
A
Clamping Current Difference (Note 2)
—
0.5
μ
A
Vdamp
Clamping Levels (Max. Deviation Compared to Table 1)
—
±
1.5
LSB
RESISTIVE REFERENCE NETWORK
Symbol
Characteristic
Min
Max
Unit
ZTOP
ZBOT
ZMID
RTOP Output Impedance
RBOT Output Impedance
RMID Output Impedance
28
48
70
130
70
130
MODE INPUT
Symbol
Characteristic
Min
Max
Unit
VIL
VIH
VIZ
IIL
IIH
IIZ
Logical “0” Level
0
0.8
V
Logical “1” Level
4.2
VDD(D)
2.8
V
Logical “Open” Level
2
V
Input Current at “0” Level
—
±
50
μ
A
Input Current at “1” Level
—
±
80
μ
A
Input Current at “Open” Level
—
±
50
μ
A
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