K155LD3 Integral chip of the TTL series. The K155LD3 chips are an eight-way OR expander. Contain 11 integral elements. K155LD3: - Supply voltage .......... 4.75 - 5.25 V - Low level input voltage .......... <0.4 V - High level input voltage ..........> 2.4 V - Low level input current .......... <16 mA - High level output current .......... <-0.8 mA - Loading capacity .......... <15 pF - Duration of front and cutoff of input pulse <150 ns