displays purdy electronics corporation ? 720 palomar avenue ? sunnyvale, ca 94085 tel: 408-523-8200 ? fax: 408-733-1287 ? sales@purdyelectronics.com ? www.purdyelectronics.com 04/24/12 1 AND491GST3-3V-W-LED intelligent character display AND491GST3-3V-W-LED intelligent character display the AND491GST3-3V-W-LED is an stn positive graye liquid crystal display. it has a trans?ective rear polarizer, white led backlight, 6 o-clock viewing angle and a wide temperature range with a 3.3v single supply volt - age. features ? stn positive gray ? trans?ective rear polarizer ? white led backlight ? 6 oclock viewing direction ? wide temperature range, 3.3v, single supply voltage ? silver frame ? rohs compliant electrical absolute maximum ratings item symbol condition min. typ. max. unit power supply for logic vdd - vss C 2.7 3.3 4.5 v input voltage vil l level 0 C- 0.6 v vih h level 2.2 vdd v lcm recommend lcd module driving voltage vdd-vo ta = 0oc v ta=25oc 2.7 3.3 4.5 ta=50oc power supply current for lcm idd vdd = 3.3v, vdd-v0=3.3v 2.0 3.0 ma led forward voltage vf if = 20 ma 3.4 3.6 v led frward current if 20 ma led reverse voltage ir vr=5v 0.2 ma product speci?cations contained herein may be changed without prior notice. i mechanical characteristics item standard value unit module size 80.0 (w) x 36.0 (h) x 8.8.0 (12.7) (d) (max.) mm viewing area 65.0 (w) x 16.0 (h) mm dot size 0.56 (w) x 0.56 (h) mm dot pitch 0.60 (w) x 0.70 (h) mm display format 16 characters (w) x 2 lines (h) C duty ratio 1/16 duty C controller st7066u or equivalent C
displays purdy electronics corporation ? 720 palomar avenue ? sunnyvale, ca 94085 tel: 408-523-8200 ? fax: 408-733-1287 ? sales@purdyelectronics.com ? www.purdyelectronics.com 04/24/12 2 electrical characteristics item symbol condition min. typ. max. unit power supply for logic vdd-vss C 2.97 3.30 3.63 v input voltage vil l level 0 C 0.6 v vh h level 2.2 C vdd v vdd-vo bias - 1/12 ta = -20oc C C C v ta = 25oc 15.8 16.3 16.8 v ta = 70oc C C C v led forward voltage vf if=160 ma C 3.4 3.6 v led forward current if C C 160 C ma led reverse current ir vr=5v C C 0.3 ma optical speci?cations (ta = 25 oc) item symbol remarks min. speci?cations typ. max. units viewing angle f (12 oclock) when cr 1.4 C 20 C deg b (6 oclock) C 40 C l (9 oclock) C 30 C r (3 oclock) C 30 C rise time tr vdd-vo = 3.3 v ta = 25oc C 200 C ms fall time tf C 250 C frame frequency frm C 64 C hz contrast cr C 3.0 C C brightness of backlight l if = 20 ma 120 180 C cd/m 2 peak emission wavelength p x = 0.29 y = 0.30 x = 0.31 y = 0.32 x = 0.33 y = 0.34 nm environmental absolute maximum ratings item wide temperature operating storage min. max. min. max. ambient temperature -20 oc +70 oc -30 oc +80oc humidity (without condensation) note 4, 5 note 4,6 note 4: background color changes slightly depending on ambient temperature. this phenomenon is reversible. note 5: ta 70oc: 75 rh max; ta > 70oc: absolute humidity must be lower than the humidity of 75% rh at 70oc. note 6: ta at -30oc will be <48 hrs, at 80oc will be < 120 hrs when humidity is higher than 75%. AND491GST3-3V-W-LED intelligent character display
displays purdy electronics corporation ? 720 palomar avenue ? sunnyvale, ca 94085 tel: 408-523-8200 ? fax: 408-733-1287 ? sales@purdyelectronics.com ? www.purdyelectronics.com 04/24/12 3 interface pin assignment pin no. pin out level function description pin no pin out level function description 1 vss 0v power supply ground 9 db2 h/l data bit 2 2 vdd 3.3v power supply voltage 10 db3 h/l data bit 3 3 v0 contrast adjustment 11 db4 h/l data bit 4 4 rs h/l register select 12 db5 h/l data bit 5 5 r/w h/l read/ write 13 db6 h/l data bit 6 6 e h, h >l enable signal 14 db7 h/l data bit 7 7 db0 h/l data bit 0 15 a 3.5v led power supply (+) 8 db1 h/l data bit 1 16 k 0v led power supply (-) block diagram AND491GST3-3V-W-LED intelligent character display power supply
displays purdy electronics corporation ? 720 palomar avenue ? sunnyvale, ca 94085 tel: 408-523-8200 ? fax: 408-733-1287 ? sales@purdyelectronics.com ? www.purdyelectronics.com 04/24/12 4 mechanical dimensions AND491GST3-3V-W-LED intelligent character display
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