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參數(shù)資料
| 型號： | MM58348V |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | MM58348 High Voltage Display Driver |
| 中文描述： | VACUUM FLUOR DISPLAY DRIVER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 142K |
| 代理商： | MM58348V |
Functional Description
(Continued)
Figure 4 demonstrates the critical timing requirements be-
tween CLOCK and DATA IN for the MM58348.
In Figure 5, a start bit of logic ‘‘1’’ precedes the 35 bits of
data, each bit being accepted on the rising edge of CLOCK,
i.e., a ‘‘0’’–‘‘1’’ transition. At the 36th clock, a LOAD signal
is generated synchronously with the high state of the clock,
thus loading the 35 bits of the shift register into the latches.
At the low state of the clock, a RESET signal is generated,
clearing all bits of the shift register for the next set of data.
Hence, a complete set of 36 clock pulses is needed to clear
(reset) the display driver at ‘‘power on’’ or any time, the
following flushing routine may be used. Clock in 36 ‘‘ze-
roes’’, followed by a ‘‘one’’ (start bit), followed by 35 ‘‘ze-
roes’’. This procedure will completely blank the display. It is
recommended to clear the driver at power on.
Figure 6 shows a schematic diagram of a microprocessor-
based system where the MM58348 is used to provide the
anode drive for a 32-digit 5 x 7 dot matrix vacuum fluores-
cent (VF) display. The grid drive in this example is provided
by another member of the high voltage display driver family,
namely the MM58341, which has the additional features of
a BLANKING CONTROL pin, a DATA OUT pin, and an EN-
ABLE (external load signal) pin.
Timing Diagrams
TL/F/5601–5
For the purpose of AC measurement, V
IH
e
2.4V, V
IL
e
0.8V
FIGURE 4. Clock and Data Timings
TL/F/5601–6
FIGURE 5. MM58348 Timings (Data Format)
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM5837 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Digital Noise Source |
| MM5837N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Digital Noise Source |
| MM5Z10 | 制造商:HTSEMI 制造商全稱:Shenzhen Jin Yu Semiconductor Co., Ltd. 功能描述:SILICON PLANAR ZENER DIODES |
| MM5Z10H | 制造商:ZOWIE 制造商全稱:Zowie Technology Corporation 功能描述:Zener Voltage Regulators |
| MM5Z10V | 功能描述:穩(wěn)壓二極管 10V 20Ohm 0.2W RoHS:否 制造商:Vishay Semiconductors 齊納電壓:12 V 電壓容差:5 % 電壓溫度系數(shù):0.075 % / K 齊納電流: 功率耗散:3 W 最大反向漏泄電流:3 uA 最大齊納阻抗:7 Ohms 最大工作溫度:+ 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-214AC 封裝:Reel |
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