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参数资料
| 型号： | HCMS-235 |
| 英文描述： | CMOS Extended Temperature Range 5 x 7 Alphanumeric Display |
| 中文描述： | 扩展温度范围的CMOS 5 × 7字符显示 |
| 文件页数： | 5/6页 |
| 文件大小： | 83K |
| 代理商： | HCMS-235 |
5
Electrical Description
The display contains four 5 x 7
LED dot matrix characters and
two CMOS integrated circuits,
as shown in Figure 1. The two
CMOS integrated circuits form
an on-board 28 bit serial-in/
parallel-out shift register that
will accept standard TTL logic
levels. The Data Input, pin 12,
is connected to bit position 1
and the Data Output, pin 7, is
connected to bit position 28.
The shift register outputs
control constant current sinking
LED row drivers. A logic 1
stored in the shift register
enables the corresponding LED
row driver and a logic 0 stored
in the shift register disables the
corresponding LED row driver.
The electrical configuration of
these CMOS IC alphanumeric
displays allows for an effective
interface to a display controller
circuit that supplies decoded
character information. The row
data for a given column (one 7
bit byte per character) is loaded
(bit serial) into the on-board 28
bit shift register with high to
low transitions of the Clock
input. To load decoded
character information into the
display, column data for
character 4 is loaded first and
the column data for character 1
is loaded last in the following
manner. The 7 data bits for
column 1, character 4, are
loaded into the on-board shift
register. Next, the 7 data bits
for column 1, character 3, are
loaded into the shift register,
shifting the character 4 data
over one character position.
This process is repeated for the
other two characters until all 28
bits of column data (four 7 bit
bytes of character column data)
are loaded into the on-board
shift register. Then the column
1 input, V
COL
pin 1, is
energized to illuminate column
1 in all four characters. This
process is repeated for columns
2, 3, 4 and 5. All V
COL
inputs
should be at logic low to insure
the display is off when loading
data. The display will be
blanked when the blanking
input V
B
, pin 8, is at logic low
regardless of the outputs of the
shift register or whether one of
the V
COL
inputs is energized.
Refer to Application Note 1016
for drive circuit information.
Figure 1. Display block diagram.
ROWS 1-7
CONSTANT CURRENT SINKING LED DRIVERS
COLUMN DRIVE INPUTS
COLUMN
1
2
3
ROWS
1
LED
MATRIX
2
ROWS 8-14
CLOCK
ROWS 1-7
LED
MATRIX
3
ROWS 15-21
ROWS 1-7
LED
MATRIX
4
ROWS 22-28
2 3 4 5 6 7
1 2 3 4 5
4
5
6 7
28-BIT SIPO SHIFT REGISTER
SERIAL
DATA
OUTPUT
SERIAL
DATA
INPUT
BLANKING
CONTROL, V
B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HCMS-2351 | 功能描述:LED 显示器和配件 Yelow 585nm 1x4 Alphanumeric RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| HCMS2351TXV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| HCMS2351TXVB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| HCMS2352TXV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| HCMS2352TXVB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
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