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Function Description Section Three
GPIB-COM User Manual 3-4 © National Instruments Corporation
Direction Buffers
These buffers control the direction in which data information travels.
GPIB Transceivers
The GPIB-COM is interfaced to the IEEE-488 bus by National Semiconductor 75160A and
75162A transceivers. These integrated circuits are specifically designed to provide power-
up/power-down bus protection (glitch-free). The GPIB-COM counts as one IEEE-488 bus load,
thereby allowing an additional 14 devices to be connected before exceeding the bus loading
restrictions imposed by the IEEE-488.