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M74HC4543C1R Folha de dados(PDF) 1 Page - STMicroelectronics |
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1 / 12 page M54HC4543 M74HC4543 February 1993 BCD TO 7 SEGMENT LATCH/DECODER/LCD DRIVER B1R (Plastic Package) ORDER CODES : M54HC4543F1R M74HC4543M1R M74HC4543B1R M74HC4543C1R F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) PIN CONNECTIONS (top view) NC = No Internal Connection DESCRIPTION . HIGH SPEED tW = 7 ns (TYP.) AT VCC =5 V . LOW POWER DISSIPATION ICC =4 µA (MAX.) AT TA =25 °C . HIGH NOISE IMMUNITY VNIH =VNIL =28 % VCC (MIN.) . OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS . SYMMETRICAL OUTPUT IMPEDANCE |IOH|= IOL = 4 mA (MIN.) . BALANCED PROPAGATION DELAYS tPLH =tPHL . WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V . PIN AND FUNCTION COMPATIBLE WITH 4543B The M54/74HC4543 is a high speed CMOS BCD- TO-7 SEGMENT DECODER WITH LCD DRIVER fabricated in silicon gate C 2MOS technology. High speed latch and decode operation 120 times as fast as standard CMOS 4511B while CMOS low power consumption in maintained. This device consist of BCD-TO-7 segment decoder with a BCD input latch and a 7-segment driver for a liquid crystal display (LCD). When any illegal BCD input signal is applied or input BI is held high, the display is blanked. When driving LCDs, a common square wave signal should be applied not only to the PH input of this device but also to the electrically common backplane of the dis- play. For other types of readouts, such as light-emit- ting diode (LED), some additional drivers, such as a transistor array is required. All inputs are equipped with protection circuits against static discharge and transient excess voltage. 1/12 |
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