purdy electronics corporation 720 palomar avenue sunnyvale, ca 94086 2-4 tel: 408.523.8200 fax: 408.733.1287 email@purdyelectronics.com www.purdyelectronics.com 6/19/98 AND671GST/gst-led 1 line x 16 characters intelligent character display the AND671GST/gst-led devices are compact, lcd modules that have an on-board lcd controller and driver circuit. these devices can display 160 characters (numerals, letters, symbols and kana letters), as well as eight custom characters. features AND671GST: super twist technology AND671GST-led: stn with led backlight low voltage, +5v single power supply controller on board (hd44780) direct interface to 4- or 8-bit cpu 11 commands for control wide temperature range option (wgst) dot matrix dimensions mechanical characteristics item speci?ation unit outline dimensions 80 (w) x 36 (h) x 11 (d) mm character size 3.07 (w) x 6.56 (h) mm viewing area 64.5 (w) x 13.8 (h) mm dot size 0.55 (w) x 0.75 (h) mm dot pitch 0.63 (w) x 0.83 (h) mm absolute maximum ratings item symbol rating unit supply voltage v dd 7.0 v input voltage v in 0 v in v dd v led forward current i f 200 ma 3.07 0.70 0.05 0.65 0.05 0.65 6.56 0.40 led reverse voltage v r 8v led power dissipation p d 800 mw operating temperature t op 0 to +50 ? storage temperature t stg ?0 to +60 ? electrical characteristics (ta = 25?) item symbol min. typ. max. unit supply voltage v dd 4.75 5.0 5.25 v v dd -v o 3.0 6.3 high level in voltage (v dd = 5.0v) v ih 2.2 v low level in voltage (i oh = 0.2 ma) v il 0 0.6 v high level output volt. (? oh = 0.2 ma) v oh 2.4 v low level output volt. (i ol = 1.2 ma) v ol 0.4 v led forward voltage (i f = 150 ma) v f 3.8 4.1 4.4 v led reverse current (v r = 8 v) i r 1.0 ma optical characteristics (ta = 25?c, f = 0? q = 0? item symbol min. typ. max. unit viewing angle f 50 degree contrast k 6.0 turn on t on 200 400 ms turn off t off 250 400 ms absolute maximum ratings (continued) item symbol rating unit
intelligent character display AND671GST/gst-led purdy electronics corporation 720 palomar avenue sunnyvale, ca 94086 6/19/98 tel: 408.523.8200 fax: 408.733.1287 email@purdyelectronics.com www.purdyelectronics.com 2-5 power supply the lcd panel is driven by the voltage v dd ? o , so an adjustable v o is required for contrast control and temperature compensation. power supply block diagram block diagram dimensional outline connector pin assignment pin no. signal function 1 gnd ground 2 v dd +5 power supply 3 v o lcd drive voltage 4rs ??data input ??command input 5 r/w read/write 6 e enable 7 dbo data bus db0-db7 are for 8-bit operation db4-db7 are for 4-bit operation 8 db1 9 db2 10 db3 11 db4 12 db5 13 db6 14 db7 temperature variations temperature v dd ? o 0? 5.00 +25? 4.75 +50? 4..50 v dd v o gnd v dd ?v o v dd ?v o = lcd drive voltage vr10 to 20 k vr v dd (+5v) controller/ driver 40 e r/w rs v dd v o gnd db0-db7 8 16 88 40 20 lcd
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