lf-301 a / k series led displays rev.b 1/3 single digit surface mo unt led numeric display lf-301 a / k series 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. z features 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. z selection guide anode cathode emitting color common red lf-301va lf-301vk lf-301ma lf-301mk green z dimensions (unit : mm) tolerance are 0.3 unless otherwise noted: 10? 6.8 10-0.4 pin no.6 pin no.10 pin no.5 pin no.1 0.2 0.8 ( 1 ) 4 1 02 2.5 5 5 0.5 p1.27 4 = 5.08 11 8 1 13 ( 1 ) ( 1 ) ( 1 ) z pin assignments pin no. a g d f b ec d.p + + 10 1 + + 9 2 + + 8 3 + + 7 4 + + 6 5 function pin no. 1 2 3 4 5 6 7 8 9 10 segment "e" segment "d" common segment "c" d.p segment "b" segment "a" common segment "f" segment "g" z equivalent circuit (anode common) (cathode common) 8 3 a 7 b 6 c 4 d 2 e 1 f 9 g 10 d.p 5 pin no. segment common 8 3 a 7 b 6 c 4 d 2 e 1 f 9 g 10 d.p 5 pin no. segment common
lf-301 a / k series led displays rev.b 2/3 z absolute maximum ratings (ta=25 c) parameter red lf-301va / vk unit mw mw ma ma v ?c ?c 320 40 15 60 5 green lf-301ma / mk 480 60 20 60 5 p d p d / seg i f i fp v r topr tstg ? 25 to + 75 ? 30 to + 85 peak forward current operating temperature storage temperature symbol ? pulse width 1ms duty 1 / 5 ?? power dissipation power dissipation forward current reverse voltage z electrical characteristics (ta=25 c) parameter red typ. unit v a nm nm 2.0 ? 650 40 max. 2.8 100 ? ? green v f i r p ? peak wavelength spectral line half width symbol i f = 10ma v r = 3v i f = 10ma i f = 10ma conditions typ. 2.1 ? 563 40 max. 2.8 100 ? ? the products are not radiations resistant. reverse current forward voltage z luminous intensity p (nm) unit color red 650 type lf-301va min. 3.6 typ. 10 mcd green 563 lf-301ma 3.6 10 mcd lf-301vk lf-301mk
lf-301 a / k series led displays rev.b 3/3 z electrical and optical characteristic curves lf-301ma lf-301mk lf-301va lf-301vk fig.1 forward current - forward voltage 0.1 1 10 100 1 1.5 2 2.5 3 ta=25 c forward voltage:v f (v) forward current:i f (ma) fig.2 relative luminous intensity - forward current 0.01 0.10 1.00 10.00 1 10 100 relative luminous intensity forward current:i f (ma) ta=25 c fig.3 relative luminous intensity - case temperature 0.4 0.6 1.2 1.4 1.6 case temparature ( c) i f =10ma -25 -15 -5 5 15 25 35 45 55 65 75 relative luminous intensity 0.8 1 fig.4 ratio of maximum tolerable peak current - pulse duration ( ) lf-301ma lf-301mk 1 10 100 1000 10000 100000 pulse duration : tw(?) 30hz 100hz 300hz 1khz 3khz 10khz 30khz 100khz 300khz ratio of maximum tolerable peak current to maximum forward current ( ) i f peak max. i f max. 1 10 fig.5 ratio of maximum tolerable peak current - pulse duration ( ? ) 1 10 1 10 100 1000 10000 pulse duration : tw(?) 100hz 200hz 500hz 1khz 2khz 5khz 10khz 20khz 50khz ratio of maximum tolerable peak current to maximum forward current ( ) i f peak max. i f max. lf-301va lf-301vk fig.6 derating 0% 20% 40% 60% 80% 100% 120% forward current (%) ambient temperature( c) -25 -15 -5 5 15 25 35 45 55 65 75 85
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. appendix1-rev2.0 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 the americas / europe / asia / japan contact us : webmaster@ rohm.co. jp www.rohm.com copyright ? 2008 rohm co.,ltd. the products listed in this document are designed to be used with ordinary electronic equipment or de vices (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. 21 saiin mizosaki- cho, ukyo-ku, kyoto 615-8585, japan tel : +81-75-311-2121 fax : +81-75-315-0172 appendix
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