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參數(shù)資料
| 型號(hào)： | HDLX-1414 |
| 英文描述： | Four Character Smart Alphanumeric Displays(四字符智能文字?jǐn)?shù)字顯示器) |
| 中文描述： | 四字符字母數(shù)字智能顯示器（四字符智能文字?jǐn)?shù)字顯示器） |
| 文件頁數(shù)： | 7/8頁 |
| 文件大小： | 186K |
| 代理商： | HDLX-1414 |
7
Display Internal Block
Diagram
Figure 2 shows the HDLX-1414
display internal block diagram.
The CMOS IC consists of a 4 x 7
Character RAM, a 128-character
ASCII decoder and the refresh
circuitry necessary to
synchronize the decoding and
driving of four 5 x 7 dot matrix
characters.
Four 7-bit ASCII words are stored
in the Character RAM. The IC
reads the ASCII data and decodes
it vita the 128-character ASCII
decoder. This decoder includes
the 64-character set of the HPDL-
1414, 32 lower case ASCII
symbols, and 32 foreign language
symbols.
Electrical Description
Pin Function
\Write
(\WR, pin 3)
Address Inputs
(A
1
and A
0
, pins
4 and 5)
Description
WR must be logic 0 to store data in the
display.
A
0
and A
1
select a specific location in the
display memory. Address 00 accesses the far
right character, and address 11 accesses the
far left position.
V
DD
is the positive power supply input.
V
DD
(pin 6)
Ground
(GND, pin 7)
Data Inputs
(D0–D6, pins 1,
2, 8-12)
Ground is the display ground.
D0–D6 are used to specify the input data
for the display.
Data Entry
Figure 1 shows a truth table for
the HDLX-1414 display. Address
inputs A
0
and A
1
are used to
select the digit location in the
display. When A
0
and A
1
are both
logic low, data is loaded into the
right most character.
Data inputs D
0
–D
6
are used to
load information into the display.
Data is latched into the given
character address on the rising
edge of the \WR signal. Data and
Address inputs must be held
stable during the write cycle to
ensure that correct data is stored
in the display.
Mechanical and Electrical
Considerations
The HDLX-1414 is a 12-pin DIP
package that can be stacked to
create a character array of any
size. The display is designed to
operate reliably in –40C to
+85C ambient temperatures.
The HDLX-1414 is assembled by
die attaching and wire bonding
140 LEDs and a CMOS IC to a
high temperature printed circuit
board. A polycarbonate lens is
placed over the PC board,
creating a protective air gap over
the LED wire bonds. Backfill
epoxy environmentally seals the
display package. This package
construction makes the display
highly tolerant to temperature
cycling and allows wave
soldering.
ESD and Latchup
Protection
The inputs to the CMOS IC are
protected against static discharge
and input current latchup.
However, for best results,
standard CMOS handling
precautions should be used. Prior
to use, the HDLX-1414 should be
stored in antistatic tubes or
conductive material. During
assembly a grounded conductive
work area should be used, and
assembly personnel should wear
conductive wrist straps. Lab
coats made of synthetic material
should be avoided since they are
prone to static charge build-up.
Input current latchup can be
caused when the CMOS inputs
are subjected either to a voltage
below ground (V
in
< ground) or
higher than V
DD
(V
in
> V
DD
) and
when a high current is forced into
the input. To prevent input
current latchup and ESD damage,
unused inputs should be
connected either to ground or to
V
DD
. Voltages should not be
\
WR
1
0
A1
X
0
A0
X
0
D6
X
Digit 0 ASCII Data (Right Most
Character)
Digit 1 ASCII Data
Digit 2 ASCII Data
Digit 3 ASCII Data (Left Most
Character)
D5
X
D4
X
D3
X
D2
X
D1
X
D0
X
Function
No Change
0
0
0
0
1
1
1
0
1
Figure 1. Display Truth Table
0 = Logic 0; 1 = Logic 1; X = Do Not Care.
Write to
Character
RAM
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HDLX-2416 | Four Character 5.0 mm (0.2 inch) Smart 5 x 7 Alphanumeric Displays(四字符 5.0 mm (0.2 英寸) 智能 5 x 7文字?jǐn)?shù)字顯示器) |
| HDLX-3461 | Four Character 6.9 mm (0.27 inch) Smart 5 x 7 Alphanumeric Displays |
| HDM16216H-4 | 16 Character x 2 Lines, Large Character |
| HDM16216H-B | 16 Character x 2 Lines, Connector on Bottom |
| HDM16216L-B | 16 Character x 2 Lines, LED Backlight, Connector on Bottom |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HDLX-1414_12 | 制造商:AVAGO 制造商全稱:AVAGO TECHNOLOGIES LIMITED 功能描述:Four Character Smart Alphanumeric Displays |
| HDLX-2416 | 制造商:AGILENT 制造商全稱:AGILENT 功能描述:Four Character 5.0 mm (0.2 inch) Smart 5 x 7 Alphanumeric Displays |
| HDLX-3461 | 制造商:AGILENT 制造商全稱:AGILENT 功能描述:Four Character 6.9 mm (0.27 inch) Smart 5 x 7 Alphanumeric Displays |
| HDLY-1414 | 功能描述:LED 顯示器和配件 Yellow 585nm 1x4 Alphanumeric RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| HDLY-2416 | 功能描述:LED 顯示器和配件 Yellow 585nm 1x4 Alphanumeric RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
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