SN54ABT657A transceivers equivalent, octal transceivers.
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EPIC-ΙΙB is .
The 'ABT657A transceivers have eight noninverting buffers with parity-generator/ checker circuits and control signals. The transmit/receive (T/R) input determines the direction of data flow. When T/R is high, data flows from the A port to the B port.
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