MC14008B_05 datasheet(6/8 Pages) ONSEMI

Part #	MC14008B

Description	4?묪it Full Adder

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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MC14008B

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Figure 5. Logic Diagram

Cin

A1

B1

A2

B2

A3

B3

A4

B4

S1

S2

S3

S4

Cout

Figure 6. Using the MC14008B in a 16−Bit Adder Configuration

WORD A + B INPUTS

A1

B4

A1

B4

A1

B4

A1

B4

S1

S4

S1

S4

S1

S4

S1

S4

Cin

Cout

CHIP

1

CHIP

2

CHIP

3

CHIP

4

SUM OUTPUTS

Calculation of 16−bit adder speed:

tP total = tP (Sum to Carry) + tP (Carry to Sum) + 2 tP (Carry to Carry)

The guaranteed 16−bit adder speed at 10 V, 25

°C, CL = 50 pF is:

tp total = 290 + 310 + 300 = 900 ns

TYPICAL APPLICATION

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