B
BR
RI
IG
GH
HT
T
L
LE
ED
D
E
EL
LE
EC
CT
TR
RO
ON
NI
IC
CS
S
C
CO
OR
RP
P.
.
B
BM
M-
-1
11
16
68
88
8N
NA
A
Ver.1.0 Page 1 of 3
SINCE 1981
● Package Dimensions :
Notes:
1. All dimensions are in millimeters(inches).
2. Tolerance is ±0.25mm(.01")unless otherwise
specified.
3. Specifications are subject to change without
notice.
● Features :
1. 1.496 inch (38.00mm) matrix height.
2. Dot size 3.70mm.
3. Low power requirement.
4. Excellent characters appearance.
5. Solid state reliability.
6. Multiplex drive , column cathode com.
and row anode com.
7. Single color available.
8. Categorized for luminous intensity.
9. Stackable vertically and horizontally.
● Description :
1. The BM-11688NA is a 38.0mm (1.496")
matrix height 8×8 dot matrix display.
2. This product use super red chips , which
are made from AlGaAs on GaAs
substrate.
3. This product have a black face and
water clear dots.
4. This product doesn't contain restriction
substance, comply ROHS standard
● Internal Circuit Diagram :
B
BR
RI
IG
GH
HT
T
L
LE
ED
D
E
EL
LE
EC
CT
TR
RO
ON
NI
IC
CS
S
C
CO
OR
RP
P.
.
B
BM
M-
-1
11
16
68
88
8N
NA
A
Ver.1.0 Page 2 of 3
SINCE 1981
● Absolute Maximum Ratings(Ta=25℃)
Parameter Symbol Rating Unit
Power Dissipation Per Dot Pd 80 mW
Forward Current Per Dot IF 30 mA
Peak Forward Current Per Dot IFP
(Duty 1/10, 1KHZ) 150 mA
Reverse Voltage Per Dot VR 5 V
Operating Temperature Topr -40℃~80℃ -
Storage Temperature Tstg -40℃~85℃ -
Soldering Temperature
(1/16" From Body) Tsol 260℃ For 5 Seconds -
● Electrical And Optical Characteristics(Ta=25℃)
Parameter Symbol Condition Min. Typ. Max. Unit
Forward Voltage Per Dot VF I
F=10mA - 1.7 2.5 V
Luminous Intensity Per Dot Iv IF=10mA - 19.0 - mcd
Reverse Current Per Dot IR VR=5V - - 100
µA
Peak Wave Length λp IF=10mA - 660 - nm
Dominant Wave Length λd IF=10mA 638 - 648 nm
Spectral Line Half-width ∆λ IF=10mA - 20 - nm
B
BR
RI
IG
GH
HT
T
L
LE
ED
D
E
EL
LE
EC
CT
TR
RO
ON
NI
IC
CS
S
C
CO
OR
RP
P.
.
B
BM
M-
-1
11
16
68
88
8N
NA
A
Ver.1.0 Page 3 of 3
SINCE 1981
● Typical Electro-Optical Characteristics Curves
(25℃ Ambient Temperature Unless Otherwise Noted)
Fig.1 Relative Radiant Intensity VS. Wavelength
Wavelength(nm)
Forward Voltage
Fig.4 Relative Luminous
Forward Current(mA)
Forward Voltage (V)
Relative Luminous Intensity
0.0
(@20mA)
1.0
2.0
Forward Current (mA)
3.0
0
30
10
20
40
50
4010 20 30 50
Forward Current
4
Intensity VS.
123 5
Fig.2 Forward Current VS.
Relative Radiant Intensity
570
0
0.5
1.0
600 630
Ambient Temperature
Ambient Temperature
Derating Curve VS.
Fig.5 Forward Current
Ambient Temperature Ta( C)
Ambient Temperature Ta( C)
0
20
Forward Current(mA)
10
30
40
20 40 60 80
Relative Luminous Intensity
(@20mA)
0.5
50
-40
0
1.5
1.0
3.0
2.5
2.0
0-20 20
120100
40 60
Fig.3 Relative Luminous
660 690
Intensity VS.
720 750
