View tc74hc299af datasheet:

TC74HC299AF (1/2) IL08D C-MOS 8-BIT PIPO SHIFT REGISTER WITH ASYNCHRONOUS CLEAR —TOP VIEW— S0 1 VDD 20 9 CLR 2 19 S1 2 G1 G1 3 G2 3 18 SL G2 1 S0 G/QG 4 17 QH' 19 S1 E/QE 5 16 H/QH 12 CK C/QC 6 15 F/QF 11 SR 18 SL A/QA 7 14 D/QD 7 8 A/QA QA' QA' 8 13 B/QB 13 B/QB 6 C/QC 9 12 CK 14 CLR D/QD 5 E/QE 10 GND 11 SR 15 F/QF 4 G/QG 16 17 H/QH QH' INPUTS INPUTS/OUTPUTS OUTPUTS OUTPUT MODE FUNCTION SHIFT A/ B/ C/ D/ E/ F/ G/ H/ CONTROL CLR CK S1 S0 G1 G2 SL SR QA QB QC QD QE QF QG QH QA QH HI-Z 0 X 1 1 X X X X 0 0 HI-Z 0 X 0 X 0 0 X X 0 0 0 0 0 0 0 0 0 0 CLEAR 0 X X 0 0 0 X X 0 0 0 0 0 0 0 0 0 0 HOLD 1 X 0 0 0 0 X X QAo QBo QCo QDo QEo QFo QGo QHo QAo QHo 1 0 1 0 0 X 1 1 QAn QBn QCn QDn QEn QFn QGn 1 QG