ST M74HC283 User Manual
M74HC283
4-BIT BINARY FULL ADDER
■ HIGH SPEED :
t
= 17ns (TYP.) at VCC = 6V
PD
■ LOW POWER DISSIPATION:
I
=4µA(MAX.) at TA=25°C
CC
■ HIGH NOISE IMMUNITY:
= V
V
NIH
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
| = IOL = 4mA (MIN)
OH
■ BALANCED PROPAGATION DELAYS:
t
≅ t
PLH
■ WIDE OPERATING VOLTAGE RANGE:
V
(OPR) = 2V to 6V
CC
■ FULL-CARRY LOOK-AHEAD ACROSS THE
= 28 % VCC (MIN.)
NIL
PHL
FOUR BITS
■ PARTIAL LOOK-AHEAD WI TH THE
ECONOMY OF RIPPLE CARRY
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 283
DESCRIPTION
The M74HC283 is an high speed CMOS 4 BIT
BINARY FULL ADDER fabricated with silicon gate
2
C
MOS technology.
TSSOPDIP SOP
ORDER CODES
PACKAGE TUBE T & R
DIP M74HC283B1R
SOP M74HC283M1R M74HC283RM13TR
TSSOP M74HC283TTR
Sum (Σ) outputs are provided for each bit and a
resultant carry (C4) is obtained from the fourth bit.
This adder features full internal look ahead across
all four bits. A 4 x n binary adder is easily built up
by cascading without any additional logic.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
1/9August 2001
M74HC283
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
4, 1, 13, 10
5, 3, 14, 12 A1 to A4 A Operand Inputs
6, 2, 15, 11 B1 to B4 B Operand Inputs
7 C0 Carry Input
9 C4 Carry Output
8 GND Ground (0V)
16 Vcc Positive Supply Voltage
TRUTH TABLE
INPUTS OUTPUTS
Σ1 to Σ4
Sum Outputs
Bn An Cn - 1
LLLLL
LLHHL
LHLHL
LHHLH
HLLHL
HLHLH
HHLLH
HHHHH
BLOCK DIAGRAM
Σn
Cn
2/9
LOGIC DIAGRAM
M74HC283
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
I
I
OK
I
I
or I
CC
P
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65
Supply Voltage
CC
DC Input Voltage -0.5 to VCC + 0.5
I
DC Output Voltage -0.5 to VCC + 0.5
O
DC Input Diode Current
IK
DC Output Diode Current
DC Output Current
O
DC VCC or Ground Current
GND
Power Dissipation
D
Storage Temperature
stg
Lead Temperature (10 sec)
L
°C; derate to 300mW by 10mW/°C from 65°C to 85°C
-0.5 to +7 V
V
V
± 20 mA
± 20 mA
± 25 mA
± 50 mA
500(*) mW
-65 to +150 °C
300 °C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
V
V
T
t
r
Supply Voltage
CC
Input Voltage 0 to V
I
Output Voltage 0 to V
O
Operating Temperature
op
Input Rise and Fall Time VCC = 2.0V
, t
f
V
V
CC
CC
= 4.5V
= 6.0V
2 to 6 V
CC
CC
-55 to 125 °C
0 to 1000 ns
0 to 500 ns
0 to 400 ns
V
V
3/9
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