MM54C90

MM54C90 MM74C90 4-Bit Decade Counter MM54C93 MM74C93 4-Bit Binary Counter February 1988 MM54C90 MM74C90 4-Bit Decade Counter MM54C93 MM74C93 4-Bit Binary Counter General Description The MM54C90 MM74C90 decade counter and the MM54C93 MM74C93 binary counter and complementary MOS (CMOS) integrated circuits constructed with N- and P-channel enhancement mode transistors The 4-bit decade counter can reset to zero or preset to nine by applying appropriate logic level on the R01 R02 R91 and R92 inputs Also a separate flip-flop on the A-bit enables the user to operate it as a divide-by-2 5 or 10 frequency counter The 4-bit binary counter can be reset to zero by applying high logic level on inputs R01 and R02 and a separate flip-flop on the A-bit enables the user to operate it as a divide-by-2 -8 or -16 divider Counting occurs on the negative going edge of the input pulse All inputs are protected against static discharge damage Features Y Y Y Y Y Wide supply voltage range Guaranteed noise margin High noise immunity Low power TTL compatiblity The MM54C93 MM74C93 MM74L93 Pinout follows 3V to 15V 1V 0 45 VCC (typ ) Fan out of 2 driving 74L the MM54L93 Connection and Logic Diagrams MM54C90 MM74C90 Dual-In-Line Package MM54C93 MM74C93 Dual-In-Line Package TL F 5889 – 2 TL F 5889 – 4 Top View Order Number MM54C90 or MM74C93 M54C90 MM74C90 Top View MM54C93 MM74C93 TL F 5889 – 3 TL F 5889 – 1 C1995 National Semiconductor Corporation TL F 5889 RRD-B30M105 Printed in U S A Abs...