HCC4030B Просмотр технического описания (PDF) - STMicroelectronics

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HCC4030B

QUAD EXCLUSIVE-OR GATE

STMicroelectronics 

HCC/HCF4030B

Table 1 : Two’s Complement Numbers and Their Equivalent Decimal Values.

X8 X7 X6 X5 X4 X3 X2 X1

X8 X7 X6 X5 X4 X3 X2 X1

0 0 0 0 0 0 0 0 = 0 1 1 1 1 1 1 1 1 = -1

0 0 0 0 0 0 0 1 = 1 1 1 1 1 1 1 1 0 = -2

0 0 0 0 0 0 1 0 = 2 1 1 1 1 1 1 0 1 = -3

0 0 0 0 0 0 1 1 = 3 1 1 1 1 1 1 0 0 = -4

1 1 1 1 1 0 1 1 = -5

0 1 1 1 1 1 1 0 = 126 1 0 0 0 0 0 0 1 = -127

0 1 1 1 1 1 1 1 = 127 1 0 0 0 0 0 0 0 = -128

The two’s complement adder-substractor can add or substract any two of the numbers in table 1. For exam-

ple :

a) 2 SIGN

+ = BIT

–5 X 0 0 0 0 0 0 1 0 2 +

Y 1 1 1 1 1 0 1 1 –5 +

CI

0

S 0 1 1 1 1 1 1 0 1 = –3

CO

SIGN

b) –2 BIT

– = X 1 1 1 1 1 1 1 0 –2 +

–5 Y 1 1 1 1 1 0 1 1 –5

Y 0 0000100 +

CL

1

S 1 0 0 0 0 0 0 1 1 =3

CO

TEST CIRCUITS

Quiescent Device Current.

Input Voltage.

Input Leakage Current.

7/12

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