CD4008BM Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – 4-Bit Full Adder

February 1988
CD4008BM CD4008BC 4-Bit Full Adder
General Description
The CD4008B types consist of four full-adder stages with
fast look-ahead carry provision from stage to stage Circuitry
is included to provide a fast ‘‘parallel-carry-out’’ bit to permit
high-speed operation in arithmetic sections using several
CD4008B’s CD4008B inputs include the four sets of bits to
be added A1 to A4 and B1 to B4 in addition to the ‘‘Carry
in’’ bit from a previous section CD4008B outputs include
the four sum bits S1 and S4 in addition to the high-speed
‘‘parallel-carry-out’’ which may be utilized at a succeeding
CD4008B section
All inputs are protected from damage due to static dis-
charge by diode clamps to V_DD and GND
Features
Y _{Wide supply voltage range}
3 0V to 15V
Y _{High noise immunity}
Y _{Low power TTL}
0 45 V_CC (typ )
Fan out of 2 driving 74L
compatibility
or 1 driving 74LS
Y _{4 sum outputs plus parallel look-ahead carry-output}
Y _{Quiescent current specified to 15V}
Y _{Maximum input leakage of 1 mA at 15V (full package}
temperature range)
Block Diagram
Truth Table
A_i B_i C_i C0 SUM
0
0
0
0
0
1
0
0
0
1
0
1
0
0
1
1
1
0
1
0
0
0
1
0
1
1
0
1
1
0
0
1
1
1
0
1
1
1
1
1
Connection Diagram
Dual-In-Line Package
TL F 5944 – 1
Order Number CD4008B
Top View
C1995 National Semiconductor Corporation TL F 5944
TL F 5944 – 2
RRD-B30M105 Printed in U S A