Features
- Hysteresis at inputs to improve noise margin
- PNP input reduces loading
- 3-state output drive bus lines
- Inputs and outputs opposite side of the package, allowing the easier interface to a microprocessor
- Input clamp diode limit high-speed termination effect
74245 8-Bit 3-State Bus Transceiver IC
74257 IC Quad 2 Input Multiplexer with 3 State Output 2 to 1 Multiplexer 

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