74LVC1284 3.3 V Parallel Printer Interface Transceiver/buffer

The 74LVC1284 parallel Interface chip is designed to provide an asynchronous, 4-bit, bi-directional, parallel printer Interface for personal computers. Three additional lines are included to provide handshaking signals between the host and the peripheral. The part is designed to match IEEE 1284 standard. The 4 transceiver pins (A/B 1-4) allow data transmission from the A bus to the B bus, or from the B bus to the A bus, depending on the state of the direction pin DIR. The B bus and the Y5-Y7 lines have totem pole or open drain style outputs depending on the state of the high drive enable pin HD. The A bus only has totem pole style outputs. All inputs are TTL compatible with at least 300mV of input hysteresis at VCC = 3.3V.
By NXP Semiconductors