Page 1
1.85 inch ( 47.0mm )
8X8 DOT MATRIX LED DISPLAY
UVP-2688/2788 SERIES
DESCRIPTION
The UVP-2688/2788 is 1.85 inch ( 47.0mm) height 8X8 dot matrix display.
Single color displays have the choices of three bright colors-AlGaAs red/green/yellow.
Multicolor displays are applicable to two bright colors:green and red orange
All device have black face and white dot.
The AlGaAs red LED chip are made from AlGaAs on a non-transparent GaAs substrate.
The green LED chip are made from GaP on a transparent GaP substrate.
The yellow and red orange LED chip are made from GaAsP on a transparent GaP substrate.
FEATURES
l Industuy standard size
l Wide viewing angle
l Continuous uniform dot matrix.
l Excellent characters appearance
l Low power requirement
DEVICES
ABSOLUTE MAXIMUM RATINGS
@ TA=25oC
GREEN YELLOW
UNIT
36 32 36 mW
100 80 100 mA
13 10 13 mA
0.17 0.12 0.17
mA/oC
5 5 5 V
11/14/2000
PACKAGE DIMENSION
INTERNAL CIRCUIT
DIAGRAM
AlGaAs RED
36
Column Anode
PARAMETER
Power Dissipation Per Dot
Fig. 1 Fig. 2
UVP-2688
0.20
PART NO. DESCRIPTION
UVP-2788
Column Anode
Continuous Forward Current Per Dot
Derating Linear From 25
o
C Per Dot
Storage Temperature Range
Solder Temperature 1/16 inch Below Seating Plane for 3 Seconds at 260
o
C
Peak Forward Current Per Dot
Reverse Voltage Per Dot
Operating Temperature Range
5
-35oCto+85
o
C
-35oCto+85
o
C
125
15
Unity Opto Technology Co., Ltd.
Page 2
1.85 inch ( 47.0mm )
8X8 DOT MATRIX LED DISPLAY
UVP-2688/2788 SERIES
PACKAGE DIMENSIONS
Fig. 1
INTERNAL CIRCUIT DIAGRAM
UVP-2688A
UVP-2788A
Fig. 2
11/14/2000
Unity Opto Technology Co., Ltd.
Page 3
1.85 inch ( 47.0mm )
8X8 DOT MATRIX LED DISPLAY UVP-2688/2788 SERIES
UVP-2688/2788 SERIES
PIN CONNECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
11/14/2000
ANODE CO. 1 ANODE COL. 1G
NO PIN ANODE COL. 1E
ANODE COL. 3G
NO PIN ANODE COL. 3E
CATHODE ROW 1 CATHODE ROW 1
ANODE COL. 3
UVP-2688
CATHODE ROW 2
ANODE COL. 2
NO PIN
CATHODE ROW 4
ANODE COL. 4
NO PIN
CATHODE ROW 6
ANODE COL. 8G
ANODE COL. 8E
NO PIN
CATHODE ROW 8
ANODE COL. 8
NO PIN
ANODE COL. 4E
CATHODE ROW 6
ANODE COL. 6 ANODE COL. 6G
PIN
CONNECTION
ANODE COL. 6E
CATHODE ROW 8
UVP-2788
CATHODE ROW 2
ANODE COL. 2G
ANODE COL. 2E
CATHODE ROW 4
ANODE COL. 4G
CATHODE ROW 7
ANODE COL. 7G
NO PIN ANODE COL. 7E
CATHODE ROW 7
ANODE COL. 7
CATHODE ROW 5 CATHODE OW 5
ANODE COL. 5 ANODE COL. 5G
NO PIN ANODE COL. 5E
CATHODE ROW 3 CATHODE ROW 3
Unity Opto Technology Co., Ltd.
Page 4
1.85 inch ( 47.0mm )
8X8 DOT MATRIX LED DISPLAY UVP-2688/2788 SERIES
ELECTRICAL/OPTICAL CHARACTERISTICS
AlGaAs RED (UVP-2688AC)
@ TA=25oC
SYMBOL MIN. TYP. MAX. UNIT
I
V
6300 12000 µcd
λp/Hue 660/638 nm
∆λ 35 nm
V
F
1.8 2.4 V
I
R
100 µA
IV-m 2:1
GREEN (UVP-2688AG) & (UVP-2788AA GREEN)
@ TA=25oC
SYMBOL MIN. TYP. MAX. UNIT
I
V
1780 4800 µcd
λp/Hue 565/569 nm
∆λ 30 nm
V
F
2.1 2.6 V
I
R
100 µA
IV-m 2:1
YELLOW (UVP-2688AY)
@ TA=25oC
SYMBOL MIN. TYP. MAX. UNIT
I
V
1780 4800 µcd
λp/Hue 585/588 nm
∆λ 35 nm
V
F
2.1 2.6 V
I
R
100 µA
IV-m 2:1
RED ORANGE (UVP-2788AA RED ORANGE)
@ TA=25oC
SYMBOL MIN. TYP. MAX. UNIT
I
V
1780 4800 µcd
λp/Hue 630/621 nm
∆λ 40 nm
V
F
2.0 2.6 V
I
R
100 µA
IV-m 2:1
11/14/2000
Reverse Current, any Dot
VR = 5 V
Luminous Intensity Matching Ratio
IF = 10 mA
Spectral Line Half-Width
IF = 20 mA
Forward Voltage, any Dot
IF = 20 mA
Average Luminous Intensity
Ip = 80 mA 1/16 Duty
Peak Emission Wavelength
IF = 20 mA
PARAMETER TEST CONDITION
Spectral Line Half-Width
Reverse Current, any Dot
Luminous Intensity Matching Ratio
IF = 20 mA
VR = 5 V
IF = 10 mA
Forward Voltage, any Dot
TEST CONDITION
PARAMETER
PARAMETER
TEST CONDITION
Ip = 80 mA 1/16 Duty
IF = 20 mA
IF = 20 mA
Spectral Line Half-Width
IF = 20 mA
Average Luminous Intensity
Peak Emission Wavelength
Luminous Intensity Matching Ratio
IF = 10 mA
Forward Voltage, any Dot
Average Luminous Intensity
Ip = 80 mA 1/16 Duty
IF = 20 mA
Reverse Current, any Dot
VR = 5 V
Peak Emission Wavelength
IF = 20 mA
PARAMETER TEST CONDITION
Average Luminous Intensity
Ip = 80 mA 1/16 Duty
Peak Emission Wavelength
IF = 20 mA
Spectral Line Half-Width
IF = 20 mA
Luminous Intensity Matching Ratio
IF = 10 mA
IF = 20 mA
Reverse Current, any Dot
Forward Voltage, any Dot
VR = 5 V
Unity Opto Technology Co., Ltd.
Page 5
1.2 inch ( 30.42mm )
5X7 DOT MATRIX LED DISPLAY
UVP-2688/2788 SERIES
TYPICAL ELECTRICAL/OPTICAL CHARACTERISTIC CURVES
( Ambient Temperature =25
o
C
Unless Otherwise Noted )
11/14/2000
Relative Luminous Intensity
Fig 1. RELATIVE LUMINOUS INTENSITY
VS. WAVELENGTH
0
0.5
1
500 525 550 575 600 625 650 675 700 725 750
G
YEC
0.0
1.0
2.0
3.0
4.0
0 5 10 15 20 25 30
Relative Luminous Intensity
Forward Current IF (mA)
Fig 2. RELATIVE LUMINOUS INTENSITY VS.
FORWARD CURRENT
G
0
5
10
15
20
0 10 20 30 40 50 60 70 80 90
Forward Current I
F
(mA)
C
Y
Forward Current I
F
(mA)
Forward Voltage (V)
Fig 5. FORWARD CURRENT VS.
FORWARD VOLTAGE
0
50
100
150
0.0 1.0 2.0 3.0 4.0 5.0
E
G
Forward Current I
F
(mA)
Forward Voltage (V)
Fig 6. FORWARD CURRENT VS.
FORWARD VOLTAGE
0
50
100
150
0.0 1.0 2.0 3.0 4.0 5.0
C
Y
0.0
1.0
2.0
3.0
4.0
0 5 10 15 20 25 30
Relative Luminous Intensity
Forward Current IF (mA)
Fig 4. RELATIVE LUMINOUS INTENSITY VS.
FORWARD CURRENT
C
Y
Unity Opto Technology Co., Ltd.
Ambient Temperature (
o
C )
Fig 3. ALLOWABLE DC CURRENT
VS. AMBIENT TEMPERATURE
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