MM74C90

MM74C90 MM74C93 4-Bit Decade Counter 4-Bit Binary Counter October 1987 Revised January 1999 MM74C90 MM74C93 4-Bit Decade Counter 4-Bit Binary Counter General Description The MM74C90 decade counter and the 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 s Wide supply voltage range: s Guaranteed noise margin: s High noise immunity: s Low power compatibility: Fan out of 2 TTL driving 74L s The MM74C93 follows the MM74L93 Pinout 3V to 15V 1V 0.45 VCC (typ.) Ordering Code: Order Number MM74C90N MM74C93N Package Number N14A N14A Package Description 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Connection Diagrams Pin Assignments for DIP MM74C90 MM74C93 Top View Top View © 1999 Fairchild Semiconductor Corporation...