74HC283 Philips, 74HC283 Datasheet - Page 2

• Manufacturer Part Number: 74HC283
• Description: 4-bit binary full adder with fast carry
• Manufacturer: Philips

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The 74HC/HCT283 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT283 add two 4-bit binary words (A
plus the incoming carry. The binary sum appears on the
sum outputs (
according to the equation:
QUICK REFERENCE DATA
GND = 0 V; T
Notes
1. C
2. For HC the condition is V
December 1990
SYMBOL
t
C
C
PHL
High-speed 4-bit binary addition
Cascadable in 4-bit increments
Fast internal look-ahead carry
Output capability: standard
I
4-bit binary full adder with fast carry
I
PD
CC
f
f
C
V
For HCT the condition is V
i
o
/ t
CC
PD
= input frequency in MHz
L
category: MSI
= output frequency in MHz
PLH
(C
= output load capacitance in pF
P
= supply voltage in V
is used to determine the dynamic power dissipation (P
D
L
= C
V
amb
CC
PD
PARAMETER
propagation delay
input capacitance
power dissipation capacitance per package
1
2
C
C
C
C
A
C
A
to
= 25 C; t
n
n
IN
IN
IN
IN
IN
V
or B
or B
f
o
to
to
to
to
to C
CC
4
) = sum of outputs
) and the out-going carry (C
2
n
n
1
2
3
4
OUT
to
to C
f
r
i
= t
n
OUT
I
I
f
= GND to V
= GND to V
= 6 ns
(C
L
V
CC
2
CC
CC
f
o
) where:
n
1.5 V
plus B
OUT
)
n
)
2
CONDITIONS
C
notes 1 and 2
C
=
Where ( ) = plus.
Due to the symmetry of the binary add function, the “283”
can be used with either all active HIGH operands (positive
logic) or all active LOW operands (negative logic); see
function table. In case of all active LOW operands the
results
active LOW. With active HIGH inputs, C
LOW when no “carry in” is intended. Interchanging inputs
of equal weight does not affect the operation, thus C
B
See the “583” for the BCD version.
L
1
IN
D
= 15 pF; V
can be assigned arbitrarily to pins 5, 6, 7, etc.
1
in W):
(A
2
1
1
2
to
B
1
CC
4
)
4
3
= 5 V
and C
2(A
8
2
OUT
4
B
2
16C
)
should be interpreted also as
16
18
20
23
21
20
20
3.5
88
HC
OUT
4(A
TYPICAL
74HC/HCT283
3
Product specification
15
21
23
27
25
23
24
3.5
92
B
3
HCT
) 8(A
IN
must be held
4
ns
ns
ns
ns
ns
ns
ns
pF
pF
UNIT
B
IN
4
) =
, A
1
,