资 源 简 介
These bus buffers feature three-state outputs that, when enabled, have the low impedance characterisTIcs of a TTL output with addiTIonal drive capability at high logic levels to permit driving heavily loaded bus lines without external pullup resistors. When disabled, both output transistors are turned off, presenTIng a high-impedance state to the bus so the output will act neither as a significant load nor as a driver. The ’125 and ’LS125A devices’ outputs are disabled when G is high. The ’126 and ’LS126A devices’ outputs are disabled when G is low.
