M74HC4543 BCD TO 7 SEGMENT LATCH/DECODER/LCD DRIVER HIGH SPEED: t = 14ns (TYP.) at V = 6V PD CC LOW POWER DISSIPATION: I = 4A(MAX.) at T =25C CC A HIGH NOISE IMMUNITY: V = V = 28 % V (MIN.) NIH NIL CC DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: I = I = 4mA (MIN) OH OL BALANCED PROPAGATION DELAYS: t t PLH PHL ORDER CODES WIDE OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R V (OPR) = 2V to 6V CC DIP M74HC4543B1R PIN AND FUNCTION COMPATIBLE WITH SOP M74HC4543M1R M74HC4543RM13TR 74 SERIES 4543 TSSOP M74HC4543TTR DESCRIPTION The M74HC4543 is an high speed CMOS LCDs, a common square wave signal should be BCD-TO-7 SEGMENT DECODER WITH LCD applied not only to the PH input of this device but 2 DRIVER fabricated with silicon gate C MOS also to the electrically common backplane of the technology. display. For other types of readouts, such as This device consists of BCD-TO-7 segment light-emitting diode (LED), some additional decoder with a BCD input latch and a 7-segment drivers, such as a transistor array is required. All driver for a liquid crystal display (LCD). When any inputs are equipped with protection circuits illegal BCD input signal is applied or input BI is against static discharge and transient excess held high, the display is blanked. When driving voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/10M74HC4543 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1 LD Latch Disable Input (Active HIGH) 5, 3, 2, 4 A to D Address (Data) Inputs 6 PH Phase Input (Active HIGH) 7 BI Blanking Input (Active HIGH) 9, 10, 11, 12, a to g Segment Outputs 13, 15, 14 8 GND Ground (0V) 16 V Positive Supply Voltage CC TRUTH TABLE INPUT OUTPUT DISPLAY MODE LD BI PH D C B A a b c d e f g X H L X X X X L L L L L L L BLANK H LLL LL L H H H H H H L 0 H LLL LL H L H H L LLL 1 H L L L LH LH H L H HLH 2 H L L L L H HHH HH L L H 3 H LLL H L LL H H L L H H 4 H L L L H L HH L H H L HH 5 H L L L HH L H L HH HHH 6 H LLL H H H H H H L LLL 7 H L LH L L LH H H H H H H 8 H L L H L L HHH HH L H H 9 H L L H L H X L L L L L L L BLANK H L L H H X X L L L L L L L BLANK L L L X X X X DISPLAY AS H INVERSE OF ABOVE OUTPUT LEVEL ABOVE X : Dont Care : Same as above combinations : Depends upon the BCD code previously applied when LD =H 2/10