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SN74F657,pdf(Octal Transceiver

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The SN74F657 contains eight noninverTIng buffers with 3-state outputs and an 8-bit parity generator/checker. It is intended for bus-oriented applicaTIons. The buffers have a specified current sinking capability of 24 mA at the A port and 64 mA at the B port. The transmit/receive (T/R) input determines the direcTIon of the data flow through the bidirecTIonal transceivers. When T/R is high, data is transmitted from the A port to the B port. When T/R is low, data is received at the A port from the B port. When the output enable () input is high, both the A and B ports are placed in a high-impedance state (disabled). The ODD/EVEN input allows the user to select between odd or even parity systems.
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