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HCMS-2351

P1-P3P4-P6
4
Switching Characteristics
Parameter  Condition  Typ.  Max.  Units
f
clock
CLOCK Rate 5 MHz
t
PLH
, t
PHL
C
L
= 15 pF 105 ns
Propagation Delay R
L
= 2.4 kΩ
CLOCK to DATA OUT
t
OFF
V
B
(0.4 V) to 4 5 µs
Display OFF
t
ON
V
B
(2.4 V) to 1 2
Display ON
Optical Characteristics at T
A
 = 25°C
High Performance Green HCMS-2353
Description  Symbol  Test Condition  Min.  Typ.*  Max.  Units
Peak Luminous Intensity per LED
[6]
I
vPEAK
V
DD
= 5.0 V 2400 3000 µcd
(Character Average) V
COL
= 3.5 V
V
B
= 2.4 V
T
i
= 25°C
[7]
Dominant Wavelength
[8,9]
l
d
574 nm
Peak Wavelength l
PEAK
568 nm
Yellow HCMS-2351
Description Symbol Test Condition Min Typ.* Max. Units
Peak Luminous Intensity per
LED
[6]
(Character Average)
I
vPEAK
V
DD
= 5.0V
V
COL
= 3.5 V
V
B
= 2.4V
Ti = 25°C
[7]
1600 2400 mcd
Dominant Wavelength
[8,9]
l
d
585 nm
Peak Wavelength l
PEAK
583 nm
*All typical values specied at V
DD
= 5.0 V and T
A
= 25°C unless otherwise noted.
Notes:
6. These LED displays are categorized for luminous intensity, with the intensity category designated by a letter code on the back of the package.
7. T
i
refers to the initial case temperature of the display immediately prior to the light measurement.
8. Dominant wavelength, l
d
, is derived from the CIE Chromaticity Diagram, and represents the single wavelength which denes the color of the
device.
9. Categorized for color with the color category designated by a number on the back of the package.
t
WH
t
THL
t
WL
1/f
CLOCK
t
HOLD
t
SETUP
t
PLH
, t
PHL
t
OFF
t
ON
V
IH
V
IL
V
B
V
OH
V
OL
2.4 V
0.4 V
2.0 V
0.8 V
V
IH
V
IL
2.0 V
0.8 V
V
IH
V
IL
2.0 V
0.8 V
CLOCK
DATA IN
DATA OUT
90%
10%
ON (ILLUMINATED)
OFF (NOT ILLUMINATED)
DISPLAY
5
Figure 1. Display block diagram.
ROWS 1-7
CONSTANT CURRENT SINKING LED DRIVERS
COLUMN DRIVE INPUTS
COLUMN
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
1 2 3 4 5
6 7
28-BIT SIPO SHIFT REGISTER
SERIAL
DATA
OUTPUT
SERIAL
DATA
INPUT
BLANKING
CONTROL, V
B
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 corre-
sponding LED row driver.
The electrical conguration of these CMOS IC alphanumeric
displays allows for an eective interface to a display control-
ler 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 rst 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 o 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 2. Peak column current vs. column voltage at T
A
 = 25°C.
ESD Susceptibility
The display has an ESD susceptibility ratings of CLASS 3 of
MIL-STD-883E, HBM. It is recommended that normal CMOS
handling precautions be observed with these devices.
Soldering and Post Solder Cleaning
These displays may be soldered with a standard wave
solder process using either an RMA ux and solvent clean-
ing or an OA ux and aqueous cleaning. For optimum
soldering, the solder wave temperature should be 245
°
C
and the dwell time for any display lead passing through
the wave should be 1.5 to 2 seconds. For more detailed
information, refer to Application Note 1027, Soldering
LED Components.
Contrast Enhancement
When used with the proper contrast enhancement lters,
the display is readable in sunlight.
Refer to Application Note 1029, Luminous Contrast and
Sunlight Readability of the HDSP-235X Series Alpha-
numeric Displays for Sunlight Viewable Applications, for
information on contrast enhancement for sun-light and
daylight ambient. Refer to Application Note 1015, Contrast
Enhancement Techniques for LED Displays, for information
on contrast enhancement in moderate ambients
For product information and a complete list of distributors, please go to our web site: www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2008 Avago Technologies. All rights reserved. Obsoletes 5989-3180EN
AV02-0195EN - November 28, 2008
0
100
200
300
400
500
600
0 1 2 3 4 5 6
V
COL
- COLUMN VOLTAGE - V
I
COL
- PEAK COLUMN CURRENT - mA
Night Vision Lighting
When used with the proper NVG/DV lters, HCMS-235x
display may be used in night vision lighting applications.
For a list of NVG/DV lters and a discussion on night vi-
sion lighting technology, refer to Application Note 1030,
LED Displays and Indicators and Night Vision Imaging
System Lighting.
Controller Circuits, Power Calculations, and Display Dimming
Refer to Application Note 1016, Using the HDSP-2000 Al-
phanumeric Display Family, for information on controller
circuits to drive these displays, how to do power calcula-
tions, and a technique for display dimming.
P1-P3P4-P6

HCMS-2351

Mfr. #:
Buy HCMS-2351
Manufacturer:
Broadcom / Avago
Description:
LED Displays & Accessories Yelow 585nm 1x4 Alphanumeric
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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