LF-301 A / K Series LED displays Single Digit Surface Mount LED Numeric Display LF-301 A / K Series zDimensions (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 zSelection guide Emitting color Common Anode Cathode Red Green LF-301VA LF-301VK LF-301MA LF-301MK zPin assignments Tolerance are ±0.3 unless otherwise noted: Pin No. 7 + 8 + 10 9 + + 6 + a f b g e c d + Pin No. 1 02 + 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.B 1/3 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 Max. 2.8 100 − − Typ. 2.1 − 563 40 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.B 2/3 LF-301 A / K Series LED displays zElectrical and optical characteristic curves 10.00 Ta=25°C LF-301MA LF-301MK LF-301VA LF-301VK Relative Luminous Intensity 10 1 1 1.5 2 2.5 1.00 0.10 0.01 3 1 10 Forward Voltage:VF(V) Fig.1 Forward Current - Forward Voltage Fig.2 Relative Luminous Intensity - Forward Current IF peak Max. Ratio of Maximum Tolerable peak IF Max. Current to Maximum Forward Current ) 1.6 IF=10mA 10 LF-301MA LF-301MK 0.8 0.6 0.4 -25 -15 -5 5 15 25 35 45 55 65 75 1 1 10 Case Temparature (°C) 100Hz 300Hz 30Hz 10000 100000 120% 100% Forward Current (%) 100Hz 200Hz 500Hz 1kHz 2kHz 5kHz 50kHz 10kHz LF-301VA LF-301VK 20kHz ) 1000 Fig.4 Ratio of Maximum Tolerable Peak Current - Pulse Duration ( Ι ) 10 ( 100 Pulse Duration : tw(µs) Fig.3 Relative Luminous Intensity - Case Temperature IF peak Max. Ratio of Maximum Tolerable peak IF Max. Current to Maximum Forward Current 1kHz 30kHz 1 300kHz 1.2 100kHz ( 1.4 Relative Luminous Intensity 100 Forward Current:IF(mA) 3kHz 0.1 Ta=25°C 10kHz Forward Current:IF(mA) 100 80% 60% 40% 20% 1 1 10 100 1000 10000 Pulse Duration : tw(µs) Fig.5 Ratio of Maximum Tolerable Peak Current - Pulse Duration ( ΙΙ ) 0% -25 -15 -5 5 15 25 35 45 55 65 75 85 Ambient Temperature(°C) Fig.6 Derating Rev.B 3/3 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 which 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. It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the NOTES specified in this catalog. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright © 2008 ROHM CO.,LTD. THE AMERICAS / EUROPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0