ST M74HC283 User Manual

M74HC283

4-BIT BINARY FULL ADDER

■HIGH SPEED :

tPD = 17ns (TYP.) at VCC = 6V

■LOW POWER DISSIPATION: ICC =4μA(MAX.) at TA=25°C

■HIGH NOISE IMMUNITY: VNIH = VNIL = 28 % VCC (MIN.)

■SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN)

■BALANCED PROPAGATION DELAYS: tPLH tPHL

■WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V

■FULL-CARRY LOOK-AHEAD ACROSS THE FOUR BITS

■PARTIAL LOOK-AHEAD WITH 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 C2MOS technology.

DIP		SOP	TSSOP
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

August 2001

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M74HC283

INPUT AND OUTPUT EQUIVALENT CIRCUIT	PIN DESCRIPTION
	PIN No	SYMBOL	NAME AND FUNCTION
	4, 1, 13, 10	Σ1 to Σ4	Sum Outputs
	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
Bn	An	Cn - 1	Σn		Cn
L	L	L	L		L
L	L	H	H		L
L	H	L	H		L
L	H	H	L		H
H	L	L	H		L
H	L	H	L		H
H	H	L	L		H
H	H	H	H		H

BLOCK DIAGRAM

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M74HC283

LOGIC DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value	Unit
VCC	Supply Voltage	-0.5 to +7	V
VI	DC Input Voltage	-0.5 to VCC + 0.5	V
VO	DC Output Voltage	-0.5 to VCC + 0.5	V
IIK	DC Input Diode Current	± 20	mA
IOK	DC Output Diode Current	± 20	mA
IO	DC Output Current	± 25	mA
ICC or IGND	DC VCC or Ground Current	± 50	mA
PD	Power Dissipation	500(*)	mW
Tstg	Storage Temperature	-65 to +150	°C
TL	Lead Temperature (10 sec)	300	°C

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 °C; derate to 300mW by 10mW/°C from 65°C to 85°C

RECOMMENDED OPERATING CONDITIONS

Symbol		Parameter		Value	Unit
VCC	Supply Voltage			2 to 6	V
VI	Input Voltage			0 to VCC	V
VO	Output Voltage			0 to VCC	V
Top	Operating Temperature			-55 to 125	°C
	Input Rise and Fall Time		VCC = 2.0V	0 to 1000	ns
tr, tf			VCC = 4.5V	0 to 500	ns
			VCC = 6.0V	0 to 400	ns

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