Data Sheet
HDSM-281B/283B
0.28-in. (7.0-mm) Single-Digit Surface-Mount
LED Display
Description
Features
This Broadcom® 0.28-in. (7.0-mm) height single-digit
display uses InGaN blue LED chips. This device comes with
a gray top surface and white segments.
Ordering Information
Blue
Description
HDSM-281B
Common Anode, Upper and Lower Decimal
HDSM-283B
Common Cathode, Upper and Lower Decimal
0.28-in. digit height
Low current operation
Excellent character appearance
Available in CA and CC
1000 pieces per reel
Moisture Sensitivity Level: Level 3
RoHS compliant
CAUTION! LEDs are Class 1A ESD sensitive per JESD22-A114C.01. Observe appropriate precautions during handling
and processing.
Broadcom
AV02-1645EN
March 29, 2021
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
Package Dimensions
NOTE:
1. All dimensions are in millimeters.
2. Tolerance: ± 0.25 mm unless otherwise noted.
Broadcom
AV02-1645EN
2
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
Pin Connection
(Common Anode)
Pin Number
Pin Connection
(Common Cathode)
Connection
Pin Number
Connection
1
CATHODE G
1
ANODE G
2
CATHODE DP1
2
ANODE DP1
3
CATHODE F
3
ANODE F
4
COMMON ANODE
4
COMMON CATHODE
5
CATHODE A
5
ANODE A
6
CATHODE B
6
ANODE B
7
CATHODE DP2
7
ANODE DP2
8
CATHODE C
8
ANODE C
9
COMMON ANODE
9
COMMON CATHODE
10
CATHODE D
10
ANODE D
11
CATHODE E
11
ANODE E
Internal Circuit Diagram
(Common Anode)
Internal Circuit Diagram
(Common Cathode)
4, 9
4, 9
A
B
5
Broadcom
C
6
D
8
10
E
F
11
G
3
DP2
DP1
1
2
A
7
B
5
C
6
D
8
E
10
11
F
G
3
DP2
DP1
1
2
7
AV02-1645EN
3
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
Absolute Maximum Ratings at TA = 25°C
Parameter
Power Dissipation Per Segment
Blue
Units
100
mW
Peak Forward Current Per Segment (1/10 Duty Cycle, 0.1-ms pulse width)
80
mA
Continuous Forward Current Per Segment
Derating Linearly From 25°C Per Segment
25
mA
0.25
mA/°C
Reverse Voltage Per Segment
Not designed for reverse bias operation
Operating Temperature Range
–40°C to +105°C
Storage Temperature Range
–40°C to +105°C
CAUTION! ESD: Static electricity and surge damage the LED. Use a wrist strap or anti-electrostatic glove when handling
the LED. All devices, equipment, and machinery must be properly grounded.
Electrical/Optical Characteristics at TA = 25°C
Blue
Parameter
Symbol
Min.
Typ.
Max.
Units
IV
3.4
6.7
—
mcd
IF = 10 mA
p/d
—
462/467
—
nm
IF = 20 mA
Spectral Line Half-Width
—
20
—
nm
IF = 20 mA
Forward Voltage, Per Segmente
VF
—
2.9
4.0
V
IF = 20 mA
Reverse Current, Per Segmentf
IR
—
—
100
µA
VR = 5V
IV-m
—
—
2:1
—
IF = 10 mA
Average Luminous Intensitya, b, c
Emission Wavelengthd
Luminous Intensity Matching Ratio
Test Condition
a. The luminous intensity, IV, is measured at the mechanical axis of the package.
b. The optical axis is closely aligned with the mechanical axis of the package.
c. Tolerance is ± 15%.
d. The dominant wavelength, d is derived from the CIE Chromaticity Diagram and represents the perceived color of the device.
e. Forward voltage tolerance is ± 0.1V.
f. Indicates product final test condition. Long-term reverse bias is not recommended.
Broadcom
AV02-1645EN
4
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
Typical Electrical/Optical Characteristic Curves at TA = 25°C
Blue
Figure 1: Relative Luminous Intensity vs. Wavelength
Figure 2: Forward Current vs. Forward Voltage
B
1.0
30
0.9
FORWARD CURRENT - mA
RELATIVE INTENSITY
0.8
0.7
0.6
0.5
0.4
0.3
0.2
B
25
20
15
10
5
0.1
0.0
0
400
500
600
700
800
0.0
1.0
2.0
3.0
4.0
FORWARD VOLTAGE - V
WAVELENGTH - nm
Figure 3: Allowable DC Current vs. Ambient Temperature
Figure 4: Relative Intensity vs. Forward Current
2.5
30
B
20
10
0
0
Broadcom
10
20
30
40 50
60 70 80
AMBIENT TEMPERATURE (°C)
90
100 110
RELATIVE LUMINOUS INTENSITY - mcd
(NORMALIZED AT `10mA)
FORWARD CURRENT IF (mA)
40
B
2.0
1.5
1.0
0.5
0.0
0
5
10
15
20
25
30
FORWARD CURRENT- mA
AV02-1645EN
5
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
Intensity Bin Limit (mcd)
Blue
Iv Bin Category
Min.
Max.
L
3.401
5.400
M
5.401
8.600
N
8.601
13.700
Tolerance ±15%.
NOTE:
Bin categories are established for the
classification of products. Products may not be
available in all categories. Contact your Broadcom
representative for information on currently
available bins.
SMT Soldering Profile
Pb-Free Reflow Soldering Profile
Recommended Soldering Pattern
(unit: mm)
1.27 x 5 = 6.35
TEMPERATURE
10 - 30 SEC.
217°C
200°C
250°C
3°C/SEC. MAX.
3
7.8
6°C/SEC. MAX.
150°C
3°C/SEC. MAX.
100 SEC. MAX.
60 - 120 SEC.
TIME
0.8
Recommended stencil window opening is 80%
(Acc. to J-STD-020C)
NOTE:
1. The peak temperature refers to the peak
package body temperature.
2. The number of reflow processes is limited to a
maximum of two times only. A cooling process
to normal temperature is required between the
first and second soldering processes.
Broadcom
AV02-1645EN
6
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
1.75 ± 0.1
Tape Specification (unit: mm)
2.00 ± 0.1
4.0
Ø1.5 +0.10
0.00
4.00 ± 0.1
11.50
Ø1.5 +0.10
0.00
22.25
24.00 +0.30
0.10
0.35
12.00 ± 0.1
Broadcom
AV02-1645EN
7
HDSM-281B/283B Data Sheet
0.28-in. (7.0-mm) Single-Digit Surface-Mount LED Display
Precautionary Notes
Soldering
Do not perform reflow soldering more than twice. Allow
the product to cool to normal room temperature before
the second reflow. Observe the necessary precautions
of handling moisture-sensitive devices as stated in the
following section.
Do not apply any pressure or force on the LED display
during reflow and after reflow when it is still hot.
Use reflow soldering to solder the LED display. Use
hand soldering only for rework if unavoidable, but it
must be strictly controlled to the following conditions:
– Soldering iron tip temperature = 315°C maximum
– Soldering duration = 2 seconds maximum
– Number of cycles = 1 only
– Power of soldering iron = 50W maximum
Do not touch the LED display with the soldering iron
except for the soldering terminals, as it may cause
damage.
Confirm beforehand whether the functionality and
performance of the LED display is affected by soldering
with hand soldering.
Use solder paste with no-clean flux for soldering.
To remove foreign particles on the surface of the
package, use a wet cotton bud with isopropyl alcohol
(IPA). During cleaning, rub the surface gently without
putting too much pressure. Do not wash or soak the
LED display in any solution.
Control after opening the MBB:
– Read the HIC immediately upon opening the MBB.
– Keep the LEDs at
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