Datasheet

1
Data sheet acquired from Harris Semiconductor
SCHS176D
Features
• Adds Two Binary Numbers
• Full Internal Lookahead
• Fast Ripple Carry for Economical Expansion
• Operates with Both Positive and Negative Logic
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55
o
C to 125
o
C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N
IL
= 30%, N
IH
= 30% of V
CC
at V
CC
= 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
IL
= 0.8V (Max), V
IH
= 2V (Min)
- CMOS Input Compatibility, I
l
≤ 1µA at V
OL
, V
OH
Description
The ’HC283 and ’HCT283 binary full adders add two 4-bit
binary numbers and generate a carry-out bit if the sum
exceeds 15.
Because of the symmetry of the add function, this device
can be used with either all active-high operands (positive
logic) or with all active-low operands (negative logic). When
using positive logic the carry-in input must be tied low if there
is no carry-in.
Ordering Information
PART NUMBER TEMP. RANGE (
o
C) PACKAGE
CD54HC283F3A -55 to 125 16 Ld CERDIP
CD54HCT283F3A -55 to 125 16 Ld CERDIP
CD74HC283E -55 to 125 16 Ld PDIP
CD74HC283M -55 to 125 16 Ld SOIC
CD74HC283MT -55 to 125 16 Ld SOIC
CD74HC283M96 -55 to 125 16 Ld SOIC
CD74HCT283E -55 to 125 16 Ld PDIP
CD74HCT283M -55 to 125 16 Ld SOIC
CD74HCT283MT -55 to 125 16 Ld SOIC
CD74HCT283M96 -55 to 125 16 Ld SOIC
NOTE: When ordering, use the entire part number. The suffix 96
denotes tape and reel. The suffix T denotes a small-quantity reel of
250.
Pinout
CD54HC283, CD54HCT283
(CERDIP)
CD74HC283, CD74HCT283
(PDIP, SOIC)
TOP VIEW
Functional Diagram
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
S1
B1
A1
S0
A0
B0
GND
C
IN
V
CC
A2
S2
A3
B3
S3
C
OUT
B2
5
6
3
2
15
11
12
14
4
9
S2
S1
A0
B0
A1
B1
B2
A3
B3
A2
7
C
IN
GND = 8
V
CC
= 16
10
13
1
S0
S3
C
OUT
November 1997 - Revised October 2003
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© 2003, Texas Instruments Incorporated
CD54HC283, CD74HC283,
CD54HCT283, CD74HCT283
High-Speed CMOS Logic
4-Bit Binary Full Adder with Fast Carry
[
/Title
(
CD74
H
C283
,
C
D74
H
CT28
3
)
/
Sub-
j
ect
(
High
S
peed
C
MOS
L
ogic
4
-Bit
B
inary
F
ull
A
dder