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參數(shù)資料
| 型號(hào)： | 4N51 |
| 元件分類(lèi)： | 顯示用LED |
| 英文描述： | 4X7 DOT MATRIX DISPLAY, STANDARD RED, 7.4 mm |
| 封裝： | GLASS CERAMIC, DIP-12 |
| 文件頁(yè)數(shù)： | 5/7頁(yè) |
| 文件大?。?/td> | 232K |
| 代理商： | 4N51 |
3-253
Operational
Considerations
Electrical
The 4N51-4N54 series devices
use a modified 4 x 7 dot matrix of
light emitting diodes (LEDs) to
display decimal/hexadecimal
numeric information. The LEDs
are driven by constant current
drivers. BCD information is
accepted by the display memory
when the enable line is at logic
low and the data is latched when
the enable is at logic high. To
avoid the latching of erroneous
information, the enable pulse rise
time should not exceed 200 nano-
seconds. Using the enable pulse
width and data setup and hold
times listed in the Recommended
Operating Conditions allows data
to be clocked into an array of
displays at a 6.7 MHz rate.
The blanking control input on the
4N54 display blanks (turns off)
the displayed hexadecimal
information without disturbing
the contents of display memory.
The display is blanked at a
minimum threshold level of 3.5
volts. This may be easily achieved
by using an open collector TTL
gate and a pull-up resistor. For
example, (1/6) 7416 hexinverter
buffer/driver and a 120 ohm pull-
up resistor will provide sufficient
drive to blank eight displays. The
size of the blanking pull-up
resistor may be calculated from
the following formula, where N is
the number of digits:
Rblank =(VCC - 3.5 V)/[N (1.0 mA)]
The decimal point input is active
low true and this data is latched
into the display memory in the
same fashion as the BCD data.
The decimal point LED is driven
by the on-board IC.
The ESD susceptibility of the IC
devices is Class A of MIL-STD-
883 or Class 2 of DOD-STD-1686
and DOD-HDBK-263.
Mechanical
4N51-4N54 series displays are
hermetically tested for use in
environments which require a
Figure 6. Typical Logic and Decimal
Point Input Current vs. Voltage.
Figure 7. Typical Logic and Enable
Low Input Current vs. Ambient
Temperature.
Figure 8. Typical Logic and Enable
High Input Current vs. Ambient
Temperature.
high reliability device. These
displays are designed and tested
to meet a helium leak rate of
5x 10-8 cc/sec and a fluorocar-
bon gross leak bubble test.
These displays may be mounted
by soldering directly to a printed
circuit board or inserted into a
socket. The lead-to-lead pin
spacing is 2.54 mm (0.100 inch)
and the lead row spacing is 15.24
mm (0.600 inch). These displays
may be end stacked with 2.54
mm (0.100 inch) spacing
between outside pins of adjacent
displays. Sockets such as Augat
324 AG2D (3 digits) or Augat
508 (one digit, right angle
mounting) may be used.
The primary thermal path for
power dissipation is through the
device leads. Therefore, to insure
reliable operation up to an
ambient temperature of +100
°C,
it is important to maintain a case-
to-ambient thermal resistance of
less than 35
°C/watt as measured
on top of display pin 3.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 4N51TXV | 制造商:Micropac Industries Inc 功能描述:Display; Numeric; Right Hand DP; 67023-101 |
| 4N52 | 制造商:E-OEC 制造商全稱(chēng):E-OEC 功能描述:HERMETIC , NUMERIC AND HEXADECIMAL |
| 4N53 | 制造商:E-OEC 制造商全稱(chēng):E-OEC 功能描述:HERMETIC , NUMERIC AND HEXADECIMAL |
| 4N54 | 制造商:E-OEC 制造商全稱(chēng):E-OEC 功能描述:HERMETIC , NUMERIC AND HEXADECIMAL |
| 4N54TXV | 制造商:Avago Technologies 功能描述: |
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