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參數(shù)資料
| 型號(hào)： | LC7574NE |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 1/2 Duty VFD Driver for Frequency Display(用于電子調(diào)諧頻率顯示的1/2占空VFD顯示驅(qū)動(dòng)器) |
| 中文描述： | 1 / 2職務(wù)VFD驅(qū)動(dòng)器的頻率顯示器（用于電子調(diào)諧頻率顯示的1 / 2占空變頻顯示驅(qū)動(dòng)器） |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 189K |
| 代理商： | LC7574NE |
Relation between Segment and Digit Outputs
Figure 4
Descriptions
1. Consider the examples shown in Figure 4, where data is set up so that the segment outputs S1 to S37 output a low
level on the G1 digit output timing and a high level on the G2 digit output timing. (Here, the G2 side being lighted)
2. The digit output G1 and G2 waveforms in Example 1 are output when the 10 bits of dimmer data (DM0 to DM9) are
set to 3FE
H
. The relation between t1 and the oscillator frequency f
OSC
is:
t1 = 2/f
OSC
.
For example, if f
OSC
= 1.6 [MHz], then
t1 = 2/1.6 [MHz] = 1.25 [μs].
Note that t1 and t2 are the same period in Example 1.
3. The digit output G1 and G2 waveforms in Example 2 are those when the dimmer data (DM0 to DM9) are set to a
smaller value. Although the time t1, which is from the point where digit output falls to segment output changes, does
not change, the time t2, which is from the point where segment output changes to the time the digit output rises,
becomes longer. When the dimmer data (DM0 to DM9) are set to 0FF
H
and f
OSC
is 1.6 [MHz], then the frame
frequency f
O
is:
f
O
= 1/(t3
×
2)
= f
OSC
/4096
= 391 [Hz],
and,
t3 = 1.28 [ms].
Therefore,
t2 =
= 0.96 [ms].
4. When the dimmer data (DM0 to DM9) are set to an even smaller value, the time t2, which is from the point where
segment output changes to the time the digit output rises, becomes even longer, as in Example 3. Note that t1 does
not change here, either.
(1.28 [ms] – 1.25 [μs]
× 2) ×
(3FF
H
– 0FF
H
)
1023
No. 3586-8/10
LC7574NE, 7574NW
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| LC7574 | 1/2 Duty VFD Driver with Key Input Function |
| LC75741 | 1/2 Duty Driver for Frequency Displays |
| LC75741E | 1/2 Duty Driver for Frequency Displays |
| LC75742E | RES 36K OHM 1/8W 5% 0805 SMD |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC7574NW | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:1/2 Duty VFD Driver for Frequency Display |
| LC75750E | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述: |
| LC75750W | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述: |
| LC75754M | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:CMOS LSI |
| LC75757E | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:LC75757E/W |
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