sh2002-dc90a printheads rev.a 1/5 near edge thermal printhead (8dots / mm) sh2002-dc90a sh-dc90 series was developed with two key structures step-free and near edge for the packaging printer market which requires high speed continuous printing. it is suitable for printers in factory line where high speed 24 hours continuous printing is required. z applications bar code printers card printers ticket printers general purpose compact printers z features 1) rohm new technology ?step free? structure will provide, high corrosion resistance, better resistance against scratching damage, high efficiency. 2) inclined toward the printing surface to provide excellent printing quality even for cards and thick paper. 3) prints directly on printing medium that cannot be bent. 4) using a hard conductive film as a protective film on the heating element offers excellent resistance to electrostatic damage. 5) compatible with the sh3002-dc90a (300dpi) in mechanical specifications, to facilitate the making of a series of printers. z dimensions (unit : mm) max. 5 paper feed direction max. 12 6 0.5 66 0.5 56 (effective print width) (5) max. 51 dot #448 dot #1 #2 #20 #19 #1 #4 #1 jst b4ps-vh hirose hif3fc-20pa-2.54ds 40 0.3 20 0.3 25 0.5 (21.3) m3 effective depth 3 3h10 length 4 effective depth 3 dot #1 7.3 0.3 20.5550.2 8 0.3 (13) 3h10 effective depth 3 note: no heat history control function inside the thermal printhead. external heat history control is required for high speed p rinting.
sh2002-dc90a printheads rev.a 2/5 z characteristics operating temperature running life / pulse life maximum roller diameter maximum clock frequency maximum number of dots energized simultaneously print cycle applied power applied voltage average resistance value total dot number effective printing width parameter rave v h p o slt 56 0.125 448 550 24 0.86 0.42 448 10 ? 150 / 1x10 8 5 to 45 ? ? ? ? ? ? ? ? mm mm dots ? v w / dot ms dots mhz mm km / pulses c symbol typical unit dot pitch z pin configuration 1 gnd v dd n.c. lat gnd n.c. v dd stb1 tm sens2 di2 beo clk gnd di1 gnd stb2 tm sens1 sens3 3 5 7 9 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20 circuit no. 1 vh gnd vh gnd 2 3 4 circuit no. no. circuit hirose jst
sh2002-dc90a printheads rev.a 3/5 z timing chart *if delay time for driver out can not be secured enough, there is a possibility that vh would fluctuate greatly. please design the circuit so that vh does not exceed p eak voltage (vp). tw clk t setup d i t hold di t setup lat t hold lat clk (clock) /lat (latch) di(data in) "high":black "l o w " : w h ite "high": hold "l o w " : th ro u g h min.12.5 sec (max. tdo)* tw lat t setup stb tdo tdo /stb (strobe) driver out beo
sh2002-dc90a printheads rev.a 4/5 z equivalent circuit dot#1 dot#448 vh (com) 220 f 35v 0.1 f 50v v dd gnd beo /stb2 /stb1 /lat clk sens1 di2 di1 sens2 sens3 tm tm shift register latch register shift register #448 #193 #192 #1 di no. di2 stb 2 stb 1 448 to 193 192 to 1 dot no. 448 to 193 di1 192 to 1 stb no. dot no. fig. 2 thermistor 30k ? b:3950k
sh2002-dc90a printheads rev.a 5/5 z electrical characteristics curves 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.5 0.060 0.100 0.150 0.200 0.250 energy ( mj / dot) optical density fig. 3 representative density curve 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 1.0 2.0 3.0 4.0 5.0 4.5 3.5 2.5 1.5 0.5 scanning line time ( ms / line) supply energy (max) ( mj / dot) fig. 4 maximum energy curve 0 20 40 60 80 100 120 140 160 180 ? 100 10203040506070 temperature : ( c) resistance value : (k ? ) r25 = 30k ? b = 3950k fig. 5 thermistor curve
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 / eupope / asia / japan contact us : webmaster@ rohm.co. jp www.rohm.com copyright ? 2007 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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