74LCXP16245_05 Datasheet, PDF (2/8 Pages) Fairchild Semiconductor – Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and Pull-Down Resistors

Connection Diagram
Truth Tables
Inputs
OE₁ T/R₁
Outputs
L
L Bus B₀–B₇ Data to Bus A₀–A₇
L
H Bus A₀–A₇ Data to Bus B₀–B₇
H
X HIGH Z State on A₀–A₇, B₀–B₇ (Note 2)
Inputs
OE₂ T/R₂
Outputs
L
L Bus B₈–B₁₅ Data to Bus A₈–A₁₅
L
H Bus A₈–A₁₅ Data to Bus B₈–B₁₅
H
X HIGH Z State on A₈–A₁₅, B₈–B₁₅ (Note 2)
H HIGH Voltage Level
L LOW Voltage Level
X Immaterial
Z High Impedance
Note 2: A and B port inputs are still active.
Functional Descriptions
The LCXP16245 contains sixteen non-inverting bidirec-
tional buffers with 3-STATE outputs. the device is byte con-
trolled. Each byte has separate control inputs which can be
shorted together for full 16-bit operation. The T/R inputs
determine the direction of data flow through the device.
Logic Diagram
The OE inputs disable both the A and B ports by placing
them in a high impedance state. The pulldown resistor
(30K: normal) to GND is active only when the outputs are
3-STATED (OE HIGH). When the outputs become active
(OE LOW) the resistor is removed from the circuit.
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