TEXAS INSTRUMENTS
缓冲器, 74LS33, 4.75V至5.25V, DIP-14
或非缓冲器, 74LS33, 2输入, 24mA, 4.75V至5.25V, SOIC-14
逻辑芯片, 正或非缓冲器, 四路, 2输入, 14DIP