MM74HC4543 Datasheet | National Semiconductor

Description The MM54HC4543 MM74HC4543 BCD-to-7 segment latch decoder driver utilize advanced silicon-gate CMOS technology and can be used either as a high speed decoder or as a display driver This circuit contains a 4-bit latch BCD-to-7 segment decoder and 7 output drivers Data on the input pins flow through to the output when the LATCH ENABLE (LE) is high and is latched on the high to low transition of the LE input The PHASE input (PH) controls the polarity of the 7 segment outputs When PH is low the outputs are true 7 segment and when PH is high the outputs are inverted 7 segment When the PHASE input is driven by a liquid crystal display (LCD) backplane waveform the segment pins output the correct segment waveform for proper LCD AC drive voltages In addition a BLANKING INPUT (Bl) is provided which will blank the display The MM54HC4543 MM74HC4543 are functionally and pinout equivalent to the CD4543BC CD4543BM and the MC14543BA MC14543BC All inputs are protected from damage due to static discharge by diodes to VCC and ground Features Y Typical propagation delay 60 ns Y Supply voltage range 2 - 6V Y Maximum input current 1 m A Y Maximum quiescent supply current 80 m A (74HC) Y Display blanking Y Low dynamic power consumption Connection Diagram Dual-In-Line Package Top View TL F 5128 - 1 Order Number MM54HC4543 or MM74HC4543 Display Format TL F 5128 - 2 Truth Table Inputs Outputs LE Bl Ph D C B A a b c d e f g Display X H L X X X X L L L L L L L Blank H L L L L L LHHHHHHL H L L L L LHLHHL L L L H L L L LHLHHLHHLH H L L L LHHHHHHL LH 0 1 2 3 H L L LHL L LHHL LHH H L L LHLHHLHHLHH H L L LHHLHLHHHHH H L L LHHHHHHL L L L 4 5 6 7 HL HL HL HL L HL L LHHHHHHH 8 L HL LHHHHHLHH 9 L H L H L L L L L L L L Blank L H L H H L L L L L L L Blank HL HL HL HL L H H L L L L L L L L L Blank L H H L H L L L L L L L Blank L H H H L L L L L L L L Blank L H H H H L L L L L L L Blank L L L XXXX Inverse of Output Display H binations as Above above X don’t care esame...