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| 35-BIT LED DISPLAY DRIVER FEATURES -- -- -- -- -- -- -- -- CMOS technology Continuous brightness control Serial data input No LOAD signal required Optional external data enable and reset Wide power supply operation (3.5V to 12V) 34 or 35 outputs, 20mA sink capability Alphanumeric capability Part No: 80-08-00003 Type: PS045M APPLICATIONS -- Products with alphanumeric LED displays such as digital clock, counter, radio, multimeter, etc. -- Industrial control indicator or instrumentation readout -- Relay driver GENERAL DESCRIPTIONS The PS045M is designed to drive either 4 or 5-digit, common anode alphanumeric LED displays with the added benefit of requiring minimal interface with the display or data source. Data is transferred serially via 2 signals: clock and serial data. Data transfer without the added inconvenience of external LOAD and RESET signal is accomplished by using a format of a leading "1" followed by the allowed 35 data bits. Display brightness is determined by control of the output current for LED displays. Typically, the output current is 36 times greater that current flowing into the B.C. terminal. DIE SIZE AND PAD ASSIGNMENT 44 1 2 3 4 5 6 29 43 42 41 40 39 38 37 36 35 1 2 34 33 32 :OUT3 10:OUT35 11: 12: 13: 14: OUT OUT OUT OUT 34 33 32 31 :OUT2 3 :OUT1 4 :RESET 5 6 7 :B.C. :VDD :CLK 8 :DATA 9 :ENB 19:OUT27 20:OUT26 21:OUT25 22:OUT24 23:OUT23 24:OUT22 25:OUT21 26:OUT20 27:OUT19 28:OUT18 29:VSS 30:OUT17 31:OUT16 32:OUT15 33:OUT14 34:OUT13 35:OUT12 36:OUT11 37:OUT10 38:OUT9 39:OUT8 40:OUT7 41:VSS 42:OUT6 43:OUT5 44:OUT4 31 30 15:OUT30 16:VSS IN 17:OUT29 18:OUT28 2610um 7 28 8 27 9 10 11 12 13 14 15 16 17 18 19 20 21 22 26 25 24 23 PAD NAME VDD VSS RESET B.C. CLK DATA IN ENB OUTn DESCRIPTION Supply voltage System ground To reset all the internal registers Brightness-control current input Clock input to transfer serial data Serial data input To enable or disable serial data input Constant sinking current output 2770um OPTO TECH Since 1983 Microelectronics Business Division 2003.03 1/1 OPTO TECH CORPORATION Tel: 886-3-5638951 Fax: 886-3-5783696 http://www.opto.com.tw |
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