74LCXP16245MEAX(1998) Ver la hoja de datos (PDF) - Fairchild Semiconductor

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74LCXP16245MEAX
(Rev.:1998)

Low Voltage 16-Bit Bidirectional Transceiver with 5V Tolerant Inputs/Outputs and Pull-Down Resistors

Fairchild Semiconductor 

Connection Diagram

Truth Tables

Inputs

Outputs

OE1 T/R1

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

Outputs

OE2 T/R2

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

(30KΩ 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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