CD40147BMS

CD40147BMS December 1992 10 Line to 4 Line BCD Priority Encoder Pinout CD40147BMS TOP VIEW Features High Voltage Type (20V Rating) Encodes 10 Line to 4 Line BCD Active Low Inputs and Outputs 100% Tested for Quiescent Current at 20V 5V, 10V and 15V Parametric Ratings Maximum Input Current of 1µA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC Noise Margin (Over Full Package/Temperature Range) - 1V at VDD = 5V - 2V at VDD = 10V - 2.5V at VDD = 15V Standardized Symmetrical Output Characteristics Meets All Requirements of JEDEC Tentative Standard No. 13B, “Standard Specifications for Description of ‘B’ Series CMOS Devices” 4 1 5 2 6 3 7 4 8 5 C 6 B 7 VSS 8 16 VDD 15 0 14 D 13 3 12 2 11 1 10 9 9 A Functional Diagram Applications Keyboard Encoding 10 Line to BCD Encoding Range Selection 9 0 PRIORITY SELECT BCD ENCODER D C B A 23 22 21 20 Description CD40147BMS CMOS encoder features priority encoding of the inputs to ensure that only the highest order data line is encoded. Ten data input lines (0-9) are encoded to four line (8, 4, 2, 1) BCD. The highest priority line is line 9. All four output lines are logic 1 (VSS) when all input lines are logic 0. All inputs and outputs are buffered, and each output can drive one TTL low power Schottky load. The CD40147BMS is functionally similar to the TTL 54/74147 if pin 15 is tied low. The CD40147BMS is supplied in these 16-lead outline packages: Braze Seal DIP Frit Seal DIP Ceramic Flatpack H4T...