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參數(shù)資料
| 型號： | HD26C31 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Quadruple Differential Line Drivers With 3 State Outputs |
| 中文描述： | 四重差分線路驅動器，三態(tài)輸出 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 87K |
| 代理商： | HD26C31 |
HD26C31
11
Ta = 25
°
C
V
CC
= 4.5 V
V
CC
= 5.0 V
V
CC
= 5.5 V
Output Characteristics ("L" Level)
Output Current I
OL
(mA)
O
O
0
20
40
60
80
100
0.5
0.4
0.3
0.2
0.1
Figure 2 I
OL
vs. V
OL
Characteristics
When termination resistance R
T
is connected between the two transmission lines, as shown in figure 3 the
current path situation is that current I
OH
on the side outputting a high level (in this case, the Y output) flows
to the side outputting a low level (in this case, the Z output) via R
T
, with the result that the low level rise is
large.
If termination resistance R
T
is dropped to GND on both transmit lines, as shown in figure 4 the current path
situation is that the current that flows into the side outputting a low level (in this case, the Z output) is only
the input bias current from the receiver. As this input bias current is small compared with the signal
current, it has almost no effect on the differential input signal at the receiver end.
Figure 5 shows the output voltage characteristic when termination resistance R
T
is varied.
Also, when used in a party line system, etc., the low level rises further due to the receiver input bias
current, so that it is probably advisable to drop the termination resistance to GND.
However, the fact that it is possible to make the value of R
T
equal to the characteristic impedance of the
transmission line offers the advantage of being able to hold the power dissipation on the side outputting a
high level to a lower level than in the above case.
Consequently, the appropriate use must be decided according to the actual operating conditions
(transmission line characteristics, transmission distance, whether a party line is used, etc.).
Figure 6 shows the output characteristics when termination resistance R
T
is varied.
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相關代理商/技術參數(shù) |
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|---|---|
| HD26C31FP-E | 制造商:Renesas Electronics 功能描述:Cut Tape |
| HD26C31FPEL | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quadruple Differential Line Drivers With 3 State Outputs |
| HD26C31P(E) | 制造商:Renesas Electronics 功能描述:Cut Tape |
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| HD26C32A_04 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Quadruple Differential Line Drivers With 3 State Outputs |
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