View tc74hc193p datasheet:

TC74HC193P IL00 C-MOS PRESETTABLE SYNCHRONOUS 4-BIT UP/DOWN COUNTER —TOP VIEW— 11 LD B (DATA B) IN 1 VDD 16 15 3 A QA 1 2 B QB QB OUT 2 15 A (DATA A) IN 10 6 C QC 9 7 D QD QA OUT 3 14 RD (RESET) IN 5 12 CKUP CO (BORROW) CKDN (DOWN CLOCK) IN 4 13 BRW OUT 4 13 CKDN BRW RD (CARRY) CKUP (UP CLOCK) IN 5 12 CO OUT 14 (LOAD) QC OUT 6 11 LD IN (DATA C) QD OUT 7 10 C IN (DATA D) 8 9 D IN GND CONTROL INPUT OUTPUT COUNT MODE RD LD CKUP CKDN QD QC QB QA 1 x x x RESET TO ZERO 0 0 0 0 0 0 0 x x PRESET 1 0 0 0 1 0 1 1 UP COUNT 2 0 0 1 0 0 1 1 DOWN COUNT 3 0 0 1 1 0 1 1 1 NO COUNT 4 0 1 0 0 5 0 1 0 1 6 0 1 1 0 7 0 1 1 1 CO = • QA • QB • QC • QD CKUP 8 1 0 0 0 CKUP COUNT = 15 9 1 0 0 1 (A = B = C = D = HIGH) 10 1 0 1 0 CO