April 1988
Revised March 1999
7
4F583 4-Bi
t BC
D Adder
© 1999 Fairchild Semiconductor Corporation DS009570.prf www.fairchildsemi.com
74F583
4-Bit BCD Adder
General Description
The ’F583 high-speed 4-bit, BCD full adder with internal
carry lookahead accepts two 4-bit decimal numbers (A
0
–
A
3
, B
0
–B
3
) and a Carry Input (C
n
). It generates the decimal
sum outputs (S
0
–S
3
), and a Carry Output (C
n+4
) if the sum
is greater than 9. The 'F583 is the functional equivalent of
the 82S83.
Features
a73 Adds two decimal numbers
a73 Full internal lookahead
a73 Fast ripple carry for economical expansion
a73 Sum output delay time 16.5 ns max
a73 Ripple carry delay time 8.5 ns max
a73 Input to ripple delay time 14.0 ns max
a73 Supply current 60 mA max

Ordering Code:
Logic Symbols
IEEE/IEC
Connection Diagram
Unit Loading/Fan Out
Order Number Package Number Package Description
74F583SC M16B 16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F583PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74F
Pin
Names
Description U.L. Input I
IH
/I
IL
HIGH/LOW Output I
OH
/I
OL
A
0
–A
3
A Operand Inputs 1.0/2.0 20 µA/−1.2 mA
B
0
–B
3
B Operand Inputs 1.0/2.0 20 µA/−1.2 mA
C
n
Carry Input 1.0/1.0 20 µA/−0.6 mA
S
0
–S
3
Sum Outputs 50/33.3 −1 mA/20 mA
C
n+4
Carry Output 50/33.3 −1 mA/20 mA