HCMS-2905 Avago Technologies US Inc., HCMS-2905 Datasheet - Page 16

• Manufacturer Part Number: HCMS-2905
• Description: LED DISPL 5X7 4CHAR 3.8MM ALGAAS
• Manufacturer: Avago Technologies US Inc.
• Series: HCMS-29xxr

Specifications of HCMS-2905

• Millicandela Rating: *
• Internal Connection: *
• Size / Dimension: 0.70" L x 0.40" W x 0.20" H (17.8mm x 10.2mm x 5.1mm)
• Color: Red
• Configuration: *
• Voltage - Forward (vf) Typ: *
• Package / Case: 12-DIP
• Display Type: Alphanumeric
• Number Of Digits/alpha: 4
• Digit/alpha Size: 0.15" (3.8mm)
• Character Format: Dot Matrix
• Character Size: 3.81mm
• Led Color: Red
• Luminous Intensity: 230µcd
• No. Of Digits / Alpha: 4
• Display Area Width: 17.78mm
• Display Area Height: 10.16mm
• Emitting Color: Red
• Number Of Digits: 4
• Digit Size (in): .15in
• Viewing Area Height (mm): 3.71mm
• Viewing Area Length (mm): 2.11mm
• Package Type: DIP
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Industrial
• Operating Temp Range: -40C to 85C
• Mounting: Through Hole
• Pin Count: 12
• Total Thickness (mm): 5.08mm
• Opto Display Type: Panel
• Pattern Type: Dot Matrix
• Illumination Color: Red
• Wavelength: 645 nm
• Operating Voltage: - 0.3 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Common Pin: -
• Lead Free Status / Rohs Status: Compliant

Appendix E. Display Brightness
Two ways have been shown to control the brightness
of this LED display: setting the peak current and setting
the duty factor. Both values are set in Control Word 0.
To compute the resulting display brightness when both
PWM and peak current control are used, simply multi-
ply the two relative brightness factors. For example, if
Control Register 0 holds the word 1001101, the peak
current is 73% of full scale (BIT D
the PWM is set to 60% duty factor (BIT D
= H, BIT D
44% (.73 x .60 = .44) of full scale.
The temperature of the display will also affect the LED
brightness as shown in Figure 5.
Appendix F. Reference Material
Application Note 1027: Soldering LED Components
Application Note 1015: Contrast Enhancement Techniques
for LED Displays
For product information and a complete list of distributors, please go to our website:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other countries.
Data subject to change. Copyright © 2007 Avago Technologies Limited. All rights reserved. Obsoletes 5989-3181EN
AV02-0699EN - September 18, 2007
1
= L, BIT D
0
= H). The resulting brightness is
5
= L, BIT D
3
= H, BIT D
4
= L) and
2
www.avagotech.com
Figure 5.
3.0
2.6
2.2
1.8
1.4
1.0
0.6
0.2
-55
GREEN
T
-35
A
AlGaAs
– AMBIENT TEMPERATURE – °C
HER/ORANGE
-15
YELLOW
5
25
45
65
85