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参数资料
| 型号： | MM58348N |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 显示驱动器 |
| 英文描述： | DUST CAP |
| 中文描述： | VACUUM FLUOR DISPLAY DRIVER, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 4/6页 |
| 文件大小： | 142K |
| 代理商： | MM58348N |
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
相关PDF资料 |
PDF描述 |
|---|---|
| MM58348V | MM58348 High Voltage Display Driver |
| MM5837 | Digital Noise Source |
| MM5837N | Digital Noise Source |
| MM74C165 | Parallel-Load 8-Bit Shift Register(并行载入8位移位寄存器) |
| MM54C165 | Parallel-Load 8-Bit Shift Register |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MM58348V | 制造商:National Semiconductor Corporation 功能描述: 制造商:Texas Instruments 功能描述: |
| MM5837 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Digital Noise Source |
| MM5837N | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Digital Noise Source |
| MM5Z10 | 制造商:HTSEMI 制造商全称:Shenzhen Jin Yu Semiconductor Co., Ltd. 功能描述:SILICON PLANAR ZENER DIODES |
| MM5Z10H | 制造商:ZOWIE 制造商全称:Zowie Technology Corporation 功能描述:Zener Voltage Regulators |
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