K155LA7 Integral chip of the TTL series. The K155LA7 chips are 2 4N-HE logic elements with an open collector output and a large output branching ratio (display element). Contain 20 integral elements. K155LA7: - 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