SC16426 64-bit led static driver description SC16426 is a led driver circuit. it features in few communication ports (4 ports are used for interaction communication with the single-chip microcomputer), strong anti-interference capability (automatic error correction for communication data), heavy current drive (driving 64 led all together at most, each is 22ma), good uniformity of drive current and so on. features * few communication ports * strong anti-interference capability * 22ma heavy current drive * good uniformity of drive current applications * peripheral equipment for microcomputers * driver circuit matching with cd system hangzhou silan microelectronics co.,ltd rev:1.1 2008.07.18 http: //www.silan.com.cn page 1 of 7 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 54 52 50 48 46 44 55 53 51 49 47 45 43 42 79 41 80 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 1 2 chip topography ordering informations device package SC16426 chip block diagram absolute maximum rating (t amb =25 c, v ss =0v) parameter symbol rating unit power supply (pin17) v dd 6.0 v input /output voltage v in , v out v ss -0.3v~v dd +0.3v v operating temperature tamb -20 ~ +75 c storage temperature tstg -55~+125 c
SC16426 dc electrical characteristics (unless otherwise specified, t amb =25 c, v dd =3v) parameter symbol test conditions min. typ. max. unit operating voltage v dd normal working 2.0 3.0 5.0 v quiescent current i ds no load 0.8 1.0 a seg output low level current i ol v dd =3v, v ol =0.3v -- 22 -- ma pin configuration pin descriptions pin no. name descriptions 1 err communication checking error, when ceb is at the falling edge, it is high level, while the rising edge is low level. 2 v dd power supply, operating voltage is 2~5v 3~6 seg0~3 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 7 gnd ground 8~15 seg4~11 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 16 gnd ground 17~24 seg12~19 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 25 gnd ground 26~33 seg20~27 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 34 gnd ground 35~38 seg28~31 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 39 gnd ground 40 data communication data hangzhou silan microelectronics co.,ltd rev:1.1 2008.07.18 http: //www.silan.com.cn page 2 of 7
SC16426 hangzhou silan microelectronics co.,ltd rev:1.1 2008.07.18 http: //www.silan.com.cn page 3 of 7 pin no. name descriptions 41 ceb serial enable which is low active 42 gnd ground 43~46 seg32~35 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 47 gnd ground 48~55 seg36~43 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 56 gnd ground 57~64 seg44~51 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 65 gnd ground 66~73 seg52~59 segment drive, drive current is22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 74 gnd ground 75~78 seg60~63 segment drive, drive current is 22ma; when data is 0, led output low level; when data is 1, out put is high impedance state 79 clr clear display(do not clear display memory), and low active 80 clk communication clock which is rising edge active (the maximum operating frequency is 500khz).
SC16426 function descriptions 64 seg outputs are divided into 4 groups, and each group includes 16 seg output ports. the structure of communication data is 4-bit command code+4-bit b1s co mplement of command code+16-bit data code+16-bit b1s complement of data code, as the following figure: command code description: command code c3~c0 description 0000 clear display & clear display memory 0001 transmit the first data 0010 transmit the second data 0011 transmit the third data 0100 transmit the forth data 1111 display data begin to transmit data when ceb is low level. if the command code is 0000 or 1111, only the former 8-bit code is transmitted(that is to say no need to check the data code, if the command code is correct, it will be carried out); if the command code is 0001, 0010, 0011, and 0100, a comp lete code needs to be transmitted. the err is low at the rising edge of ceb when the command code is wron g (not the above 6 kinds of command) or the checking is wrong (checking of command code, b1s complement of command code, data code and b1s complement of data code); when the checking is correct, err is high, and carry out the command at the same time: if the data code is 0, the corresponding seg outputs low level; while the data code is 1, that outputs high impedance state. typical application circuit hangzhou silan microelectronics co.,ltd rev:1.1 2008.07.18 http: //www.silan.com.cn page 4 of 7
SC16426 chip topography chip size: 4.32x1.51 (mm 2 ) note: the substrate is connected with power supply. pad coordinates pad no. symbol x y pad no. symbol x y 1 err -2043.10 -107.40 41 ceb 2036.05 107.40 2 v dd -2043.10 -218.40 42 gnd 2043.00 218.10 3 seg0 -2026.95 -640.40 43 seg32 2033.25 640.40 4 seg1 -1911.15 -640.40 44 seg33 1917.45 640.40 5 seg2 -1795.35 -640.40 45 seg34 1801.65 640.40 6 seg3 -1679.55 -640.40 46 seg35 1685.85 640.40 7 gnd -1568.55 -640.40 47 gnd 1574.85 640.40 8 seg4 -1457.55 -640.40 48 seg36 1463.85 640.40 9 seg5 -1341.75 -640.40 49 seg37 1348.05 640.40 10 seg6 -1225.95 -640.40 50 seg38 1232.25 640.40 11 seg7 -1110.15 -640.40 51 seg39 1116.45 640.40 12 seg8 -979.65 -640.40 52 seg40 985.95 640.40 13 seg9 -863.85 -640.40 53 seg41 870.15 640.40 14 seg10 -748.05 -640.40 54 seg42 754.35 640.40 15 seg11 -632.25 -640.40 55 seg43 638.55 640.40 16 gnd -521.25 -640.40 56 gnd 527.55 640.40 17 seg12 -410.25 -640.40 57 seg44 416.55 640.40 18 seg13 -294.45 -640.40 58 seg45 300.75 640.40 19 seg14 -178.65 -640.40 59 seg46 184.95 640.40 20 seg15 -62.85 -640.40 60 seg47 69.15 640.40 21 seg16 69.15 -640.40 61 seg48 -62.85 640.40 hangzhou silan microelectronics co.,ltd rev:1.1 2008.07.18 http: //www.silan.com.cn page 5 of 7
SC16426 pad no. symbol x y pad no. symbol x y 22 seg17 184.95 -640.40 62 seg49 -178.65 640.40 23 seg18 300.75 -640.40 63 seg50 -294.45 640.40 24 seg19 416.55 -640.40 64 seg51 -410.25 640.40 25 gnd 527.55 -640.40 65 gnd -521.25 640.40 26 seg20 638.55 -640.40 66 seg52 -632.25 640.40 27 seg21 754.35 -640.40 67 seg53 -748.05 640.40 28 seg22 870.15 -640.40 68 seg54 -863.85 640.40 29 seg23 985.95 -640.40 69 seg55 -979.65 640.40 30 seg24 1116.45 -640.40 70 seg56 -1110.15 640.40 31 seg25 1232.25 -640.40 71 seg57 -1225.95 640.40 32 seg26 1348.05 -640.40 72 seg58 -1341.75 640.40 33 seg27 1463.85 -640.40 73 seg59 -1457.55 640.40 34 gnd 1574.85 -640.40 74 gnd -1568.55 640.40 35 seg28 1685.85 -640.40 75 seg60 -1679.55 640.40 36 seg29 1801.65 -640.40 76 seg61 -1795.35 640.40 37 seg30 1917.45 -640.40 77 seg62 -1911.15 640.40 38 seg31 2033.25 -640.40 78 seg63 -2026.95 640.40 39 gnd 2043.00 -218.40 79 clr -2044.20 218.40 40 data 2036.05 -107.40 80 clk -2043.10 44.95 note: the original point of t he coordinate is the die center. mos devices operate notes: electrostatic charges may exist in many things. please ta ke following preventive measures to prevent effectively the mos electric circuit as a result of the damage which is caused by discharge: z the operator must put on wrist strap which should be earthed to against electrostatic. z equipment cases should be earthed. ? z all tools used during assembly, including soldering tools and solder baths, must be earthed. z mos devices should be packed in antistatic/conductive containers for transportation. note silan reserves the right to make changes without notice in this specification for the improvement of the design and performance . silan will supply the best possible product for customers. hangzhou silan microelectronics co.,ltd rev:1.1 2008.07.18 http: //www.silan.com.cn page 6 of 7
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