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參數(shù)資料
| 型號： | MM58241V |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | MM58241 High Voltage Display Driver |
| 中文描述： | VACUUM FLUOR DISPLAY DRIVER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 150K |
| 代理商： | MM58241V |
Functional Description
(Continued)
Figure 4 demonstrates the critical timing requirements be-
tween CLOCK and DATA IN for the MM58241.
To clear (reset) the display driver at power on or any time,
the following flushing routine may be used. With the enable
signal high, clock in 32 zeroes. Drive the enable signal low
and the display will be blank. It is recommended to clear the
driver at power on.
In Figure 5, the ENABLE signal acts as an envelope, and
only while this signal is at a logic ‘1’ does the circuit accept
CLOCK input signals. Data is transferred and shifted in the
internal shift register on the rising clock edge, i.e., ‘0’–‘1’
transition. When the ENABLE signal goes low, the contents
of the shift registers are latched, and the display will show
new data. During data transfer, the display will show old
data. DATA OUT is also provided on the MM58241, being
output on the falling edge. At any time, the display may be
blanked under processor control, using the BLANKING
CONTROL input.
Figure 6 shows a schematic diagram of a microprocessor-
based system where the MM58241 is used to provide the
grid drive for a 32-digit 5 x 7 dot matrix vaccum fluorescent
(VF) display. The anode drive in this example is provided by
another member of the high voltage display driver family,
namely the MM58248, which does not require an externally
generated load signal.
TL/F/5600–3
FIGURE 3a. Output Impedance Off
TL/F/5600–4
FIGURE 3b. Output Impedance On
Timing Diagrams
TL/F/5600–5
For the purposes of AC measurements, V
IH
e
2.4V, V
IL
e
0.8V.
FIGURE 4. Clock and Data Timings
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MM58242 | High Voltage Display Driver |
| MM58242V | High Voltage Display Driver |
| MM58274CJ | Microprocessor Compatible Real Time Clock |
| MM58274C | Microprocessor Compatible Real Time Clock |
| MM58274CN | Microprocessor Compatible Real Time Clock |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM58242 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58242V | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58248 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58248N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
| MM58248V | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage Display Driver |
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