HCC40147B

HCC40147B HCF40147B 10 TO 4 LINE BCD PRIORITY ENCODER . . . . . . . . . . ENCODES 10 LINE TO 4 LINE BCD ACTIVE LOW INPUTS AND OUTPUTS STANDARDIZED, SYMMETRICAL OUTPUT CHARACTERIZATION 100 % TESTED FOR QUIESCENT CURRENT AT 20 V 5V, 10V AND 15V PARAMETRIC RATINGS MAXIMUM INPUT CURREENT OF 1 µA AT 18V OVER FULL PACKAGE TEMPERATURE o RANGE; 100 nA AT 18 V AND 25 C NOISE MARGIN (FULL PACKAGE TEMPERATURE RANGE): 1V AT VDD = 5V, 2V AT VDD = 10V, 2.5V AT VDD = 15V EY (Plastic Package) F (Ceramic Package) APPLICATIONS: KEYBOARD ENCODING 10 LINE TO BCD ENCODING RANGE SELECTION M1 (Micro Package) C1 (Chip Carrier) ORDER CODES : HCC40147BF HCF40147BM1 HCF40147BEY HCF40147BC1 PIN CONNECTIONS DESCRIPTION The HCC/HCF40147B 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 HCC/HCFF40147 is functionally similar to the T54/T74LS147 if pin 15 is tied low. The HCC/HCF40147B types are supplied in 16 lead plastic or ceramic and plastic micropackage. April 1991 1/12 HCC/HCF40147B ABSOLUTE MAXIMUM RATING Symbol VDD * Vi II Ptot Parameter Supply Voltage: HCC Types HCF Types Input Voltage DC Input Current (any one input) Total Power Dissipation (per pa...