HCMS-2919 Avago Technologies US Inc., HCMS-2919 Datasheet - Page 14

• Manufacturer Part Number: HCMS-2919
• Description: LED DISPLAY 5X7 8CHAR 3.8MM BLUE
• Manufacturer: Avago Technologies US Inc.
• Series: HCMS-29xxr

Specifications of HCMS-2919

• Display Type: Alphanumeric
• Millicandela Rating: *
• Size / Dimension: 1.40" L x 0.40" W x 0.20" H (35.6mm x 10.2mm x 5.1mm)
• Color: Blue
• Configuration: 5 x 7
• Voltage - Forward (vf) Typ: *
• Package / Case: 26-DIP
• Number Of Digits/alpha: 8
• Digit/alpha Size: 0.15" (3.8mm)
• Number Of Digits: 8
• Illumination Color: Blue
• Wavelength: 428 nm
• Operating Voltage: 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 170 ucd
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Common Pin: -
• Lead Free Status / Rohs Status: Details

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
multiply 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
= L) and the PWM is set to 60% duty factor (BIT D
BIT D
brightness is 44% (.73 x .60 = .44) of full scale. The
temperature of the display will also affect the LED
brightness as shown in Figure 8. The temperature of
the display will also affect the LED brightness as shown
in Figure 8.
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 web site:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved.
AV01-0115EN - May 16, 2006
14
2
= H, BIT D
1
= L, BIT D
0
= H). The resulting
5
= L, BIT D
3
= H,
4
Figure 8. Relative luminous intensity versus ambient
temperature.
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1.2
1.1
0.9
0.8
0.7
0.6
0.5
0.4
1
-40
-20
Ambient Temperature (
0
20
o
40
C)
60
80