ROHM LF

LF-301 A / K Series
LED displays
Single Digit Surface Mount LED Numeric Display
LF-301 A / K Series
zExternal dimensions (Unit : mm)
5±0.5
0.2
13
11
8
1
(1)
zFeatures
1) Re-flow soldering ∗
2) Pb-free availabe
3) Automatic mounting with taping pack
∗Number of re-flow process shall be recommend
1 time by our re-flow condition.
6.8
PIN No.6
P1.27×4=5.08
10-0.4
10˚
(1)
Pin No.10
5
LF-301 A / K series of Single Digit Surface Mount LED
Numeric Display which the height of a letter 8mm have
ROHM original structure that realizes re-flow soldering.
(1)
(1)
φ0.8
2.5
Pin No.1
PIN No.5
1
4
02
Tolerance are ±0.3 unless otherwise noted:
zSelection guide
Emitting color
Common
Anode
Cathode
Red
Green
LF-301VA
LF-301VK
LF-301MA
LF-301MK
zPin assignments
Pin No.
10 9
+ +
8
+
7
+
6
+
a
f
b
g
e
c
d
+
Pin No. 1
+
2
+
3
+
4
D.P
+
5
zEquivalent circuit (anode common)
1
2
3
4
5
6
7
8
9
10
Function
Segment "e"
Segment "d"
Common
Segment "c"
D.P
Segment "b"
Segment "a"
Common
Segment "f"
Segment "g"
(cathode common)
Common
Common
8 3
8 3
Segment a b c d e f g D.P
PIN No. 7 6 4 2 1 9 10 5
Segment a b c d e f g D.P
PIN No. 7 6 4 2 1 9 10 5
Rev.A
1/2
LF-301 A / K Series
LED displays
zAbsolute maximum ratings (Ta=25°C)
Parameter
Symbol
Power dissipation
Power dissipation
Forward current
Peak forward current
Reverse voltage
Operating temperature
Storage temperature
PD
PD / seg
IF
IFP
VR
Topr
Tstg
Red
Green
LF-301VA / VK
LF-301MA / MK
320
480
40
60
15
20
∗
60
60
5
5
−25 to +75
−30 to +85
Unit
∗
mW
mW
mA
mA
V
˚C
˚C
∗Pulse width 1ms Duty 1 / 5
zElectrical characteristics (Ta=25°C)
Symbol Conditions
Parameter
Forward voltage
Reverse current
Peak wavelength
Spectral line half width
VF
IR
λP
∆λ
IF=10mA
VR=3V
IF=10mA
IF=10mA
Green
Red
Typ.
2.0
−
650
40
Typ.
2.1
−
563
40
Max.
2.8
100
−
−
Max.
2.8
100
−
−
Unit
V
µA
nm
nm
The products are not radiations resistant.
zLuminous intensity
Color
λP (nm)
Red
650
Green
563
Type
LF-301VA
LF-301VK
LF-301MA
LF-301MK
Min.
Typ.
Unit
3.6
10
mcd
3.6
10
mcd
Rev.A
2/2
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1