SH2002-DC90A Printheads 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. zApplications Bar code printers Card printers Ticket printers General purpose compact printers zFeatures 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. zDimensions (Unit : mm) 66±0.5 56 (EFFECTIVE PRINT WIDTH) 6±0.5 DOT #1 Pape Max. 51 r feed directi (5) on DOT #448 Max. 5 #2 #20 #1 #19 #1 JST B4PS-VH HIROSE HIF3FC-20PA-2.54DS φ3H10 EFFECTIVE DEPTH 3 φ3H10 LENGTH 4 EFFECTIVE DEPTH 3 (21.3) 8±0.3 (13) 20±0.3 40±0.3 25±0.5 7.3±0.3 20.555±0.2 #4 Max. 12 DOT #1 M3 EFFECTIVE DEPTH 3 Note: No heat history control function inside the thermal printhead. External heat history control is required for high speed printing. Rev.A 1/5 SH2002-DC90A Printheads zCharacteristics Parameter Symbol Typical Unit mm Effective printing width − 56 Dot pitch − 0.125 mm Total dot number − 448 dots Rave 550 Ω VH 24 V Average resistance value Applied voltage Applied power PO 0.86 W / dot SLT 0.42 ms Maximum number of dots energized simultaneously − 448 dots Maximum clock frequency − 10 MHz Maximum roller diameter − − mm Running life / pulse life − 150 / 1x108 km / pulses Operating temperature − 5 to 45 °C Print cycle zPin configuration HIROSE JST No. Circuit No. Circuit No. Circuit 1 VDD 2 BEO 1 VH 3 GND 4 DI2 2 VH 5 N.C. 6 CLK 3 GND 7 LAT 8 GND 4 GND 9 GND 10 DI1 11 N.C. 12 GND 13 VDD 14 STB2 15 STB1 16 TM 17 TM 18 SENS1 19 SENS2 20 SENS3 Rev.A 2/5 SH2002-DC90A Printheads zTiming chart tw CLK CLK (CLOCK) t setup DI t hold DI DI(DATA IN) "High":BLACK "LOW" :WHITE BEO t setup LAT t hold LAT min.12.5 μsec (Max. tdo)* /LAT (LATCH) "High": HOLD "LOW" : THROUGH tw LAT t setup ST B /STBｎ (STROBE) tdo tdo DRIVER OUT *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 peak voltage (Vp). Rev.A 3/5 SH2002-DC90A Printheads zEquivalent circuit DOT#448 DOT#1 VH (COM) 220µF 35V #448 #193 #192 #1 VDD 0.1µF 50V GND BEO /STB2 /STB1 LATCH REGISTER /LAT CLK SHIFT REGISTER DI2 SHIFT REGISTER DI1 SENS1 SENS2 THERMISTOR SENS3 TM 30kΩ B:3950K TM DI No. DOT No. STB No. DI2 448 to 193 STB 2 448 to 193 DI1 192 to STB 1 192 to 1 DOT No. 1 Fig. 2 Rev.A 4/5 SH2002-DC90A Printheads zElectrical characteristics curves OPTICAL DENSITY 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.060 0.100 0.150 0.200 0.250 ENERGY (mJ / dot) Fig. 3 Representative density curve 1.0 180 0.9 160 RESISTANCE VALUE : (kΩ) SUPPLY ENERGY (MAX) (mJ / dot) 1.5 1.4 0.8 0.7 0.6 0.5 0.4 0.3 0.2 R25=30kΩ B=3950k 140 120 100 80 60 40 20 0.1 0.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SCANNING LINE TIME (ms / line) Fig. 4 Maximum energy curve 0 −10 0 10 20 30 40 50 60 70 TEMPERATURE : (°C) Fig. 5 Thermistor curve Rev.A 5/5 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 © 2007 ROHM CO.,LTD. THE AMERICAS / EUPOPE / 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