U74CB3Q3305

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 7

www.unisonic.com.tw

QW-R502-D261.a

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PIN CONFIGURATION

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PIN CONFIGURATION

PIN No

SYMBOL

TYPE

DESCRIPTION

1

1OE

I

Output Enable for Switch 1

2

1A

I/O

Channel 1A Port

3

1B

I/O

Channel 1B Port

4

GND

P

Ground

5

2A

I/O

Channel 2A Port

6

2B

I/O

Channel 2B Port

7

2OE

I

Output Enable for Switch 2

8

VCC

P

Power Supply

Note: I=Input, O=Output, I/O=Input and Output, P=Power.

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FUNCTION TABLE (Each Bus Switch)

INPUT( ΟΕ )

INPUT(A)

FUNCTION

H

B

A Port = B Port

L

Z

Disconnect

Note: H: HIGH Voltage Level; L: LOW Voltage Level; Z=High-Impedance OFF-State.

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LOGIC DIAGRAM (Positive Logic)