Datasheet

7/22/02
Page 6 of 7
© 2002 Fairchild Semiconductor Corporation
0.4 inch (10.2mm) 4 Digit
CLOCK STICK DISPLAY
Bright Red MSQC4111C
High Efficiency MSQC4911C
Green MSQC4411C
GRAPHICAL DATA High Efficiency Red (T
A
= 25°C, unless otherwise specified)
50
1.2 1.6
FORWARD CURRENT I
F
= mA
RELATIVE OUTPUT - %
FORWARD VOLTAGE (V
F
) - VOLTS
WAVELENGTH (λ) - nm
Fig. 1 FORWARD CURRENT VS. FORWARD VOLTAGE
Fig. 2 SPECTRAL RESPONSE
2.0 2.4 2.8
40
30
20
10
0
1.5
2.0
2.25
2.5
010
LUMINOUS INTENSITY RELATIVE
TO VALUE AT = 20 mA
I
F
- FORWARD CURRENT - mA
Fig. 3 RELATIVE LUMINOUS INTENSITY
VS. FORWARD CURRENT
20 30 40 50
1.25
1.0
0.5
0.25
0
2
10
LUMINOUS INTENSITY RELATIVE
TO VALUE AT = 20 mA
DUTY CYCLE % PER SEGMENT
(AVERAGE I
F
= 10mA)
Fig. 5 LUMINOUS INTENSITY VS. DUTY CYCLE
20 40 DC
1.5
1
25
30
35
-40 -20 0
IDCMAX-MAXIMUM DC CURRENT-mA
T
A
- AMBIENT TEMPERATURE °C
Fig. 4 MAXIMUM ALLOWABLE DC CURRENT PER
SEGMENT VS. A FUNCTION OF AMBIENT
TEMPERATURE
20 40 60 80 100
20
15
10
5
0
1000
1
PEAK I
P
-MA
DUTY CYCLE %
Fig. 6 MAX PEAK CURRENT VS. DUTY CYCLE %
(REFRESH RATE f = 1 KHz)
3 5 10 20 50 100
500
200
100
75
50
25
10
100
120
520 560 600 640 680 720
80
60
40
20
0