KF1502-GT20A Printheads Compact low voltage thick film thermal printhead (6dots / mm) KF1502-GT20A These compact, lightweight printheads have low power requirements and are intended for ECR and mobile applications. Drawing 7.2V, a maximum print speed of 2 inches per second is possible. zApplications ECR printers Hand-held printers zFeatures 1) A wide range of power supply voltage, from 4.2V-8.5V, can be used to drive the printhead. This gives the flexibility for use with printers designed to operate with power from various battery configurations. 2) To allow the design of compact printers for use in calculators and other mobile applications, the basic specifications of the unit have been standardized. This gives engineers greater freedom to develop mechanical designs. 3) One rank resistance value of 210Ω ± 4% eliminates the inconvenience of rank selection. zExternal dimensions (Unit : mm) 54 Dot #288 (1.1) Dot #1 No.1 M No.15 ax .φ 8. 0 (10) 1.4±0.3 10±0.3 48 (Effective Print Width) 1.0mm×14=14.0mm Connector 1/4 KF1502-GT20A Printheads zEquivalent circuit VH DOT #288 DOT #1 2 1 GND V DD STB2 STB1 LAT DI CLK LATCH REGISTER SHIFT REGISTER N.C. Fig.1 zPin assignments No. Circuit 1 VH 2 VH 3 LAT 4 N.C. 5 GND 6 GND 7 STB1 8 VDD 9 STB2 10 GND 11 GND 12 CLK 13 DI 14 VH 15 VH 2/4 KF1502-GT20A Printheads zTiming chart tw CLK CLOCK (CLK) t setup DI t hold DI DATA IN (DI) "High":BLACK "Low" :WHITE td DO DATA OUT (DO) "High":BLACK "Low" :WHITE t setup LAT t hold LAT LATCH (LAT) "High":HOLD "Low" :THROUGH tw LAT t setup STB STROBE (STB) tdo tdo DRIVER OUT Fig.2 zCharacteristics Symbol Typical Unit Effective printing width − 48.096 mm Dot pitch − 0.167 mm − 288 dots Rave 210 Ω Parameter Total dot number Average resistance value Applied voltage VH 7.2 V Applied power PO 0.14 W/dot Print cycle SLT 2.5 ms Pulse width TON 1.68 ms Maximum number of dots energized simultaneously − 144 dots Maximum clock frequency − 4 MHz Maximum roller diameter − φ8.0 Running life / pulse life − 30/5×10 km/pulses Operating temperature − 5 to 45 °C mm 7 3/4 KF1502-GT20A Printheads zElectrical characteristic curves 0.8 0.8 1.8 Paper : KF50-HDA (OJI) 0.7 1.4 0.5 0.4 0.3 0.6 ENERGY (mJ/dot) OPTICAL DENSITY 0.6 ENERGY (mJ/dot) SLT : 2.50ms/line 1.6 0.7 1.2 1.0 0.8 0.6 0.5 0.4 0.3 0.2 0.4 0.2 0.1 0.2 0.1 0 0 1 2 3 4 5 0.0 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0 0 1 2 3 4 5 SCANNING LINE TIME (ms/line) ENERGY (mJ/dot) SCANNING LINE TIME (ms/line) Fig.3 Adaptive speed chart Fig.4 Representative density curve Fig.5 Maximum energy curve 180 160 RESISTANCE : (kΩ) 140 120 100 80 60 40 20 0 −20 −10 0 10 20 30 40 50 60 70 TEMPERATURE : (°C) Fig.6 Thermistor curve 4/4 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 use silicon as a basic material. 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-Rev1.0