N74F283D

Maximum Power Dissipation :
Operating Supply Voltage : 5 V
Maximum Operating Temperature : + 70 C
Minimum Operating Temperature : 0 C
Packaging : Tube
Logic Family : F
High Level Output Current : - 1 mA
Low Level Output Current : 20 mA
Propagation Delay Time : 9.5 ns
Package / Case : SO-16


Features:

·High speed 4-bit addition
·Cascadable in 4-bit increments
·Fast Internal carry look-ahead


Pinout




Specifications

(Operation beyond the limits set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free-air temperature range.)

SYMBOL	PARAMETER	RATING	UNIT
VCC	Supply voltage	0.5 to +7.0	V
VIN	Input voltage	0.5 to +7.0	V
IIN	Input current	30 to +5	mA
VOUT	Voltage applied to output in High output state	0.5 to VCC	V
IOUT	Current applied to output in Low output state	70	mA
Tamb	Operating free-air temperature range	0 to +70	°C
Tstg	Storage temperature range	65 to +150	°C

Description

The 74F283 adds two 4-bit binary words (An plus Bn) plus the incoming carry. The binary sum of 74F283 appears on the sum outputs (0-3) and the outgoing carry (C_OUT) according to the equation:C_IN+2⁰(A0+B0)+2¹(A1+B1)+2²(A2+B2)+2³(A3+B3)=0+21+42+83+16COUT where(+)=plus

Due to the symmetry of the binary add function, the 74F283 can be used with either all active-High operands (positive logic) or with all active-Low operands (negative logic). See Function Table. In case of all active-Low operands (negative logic) the results 1-4 and COUT should be interpreted also as active-Low. With active-High inputs,C_IN cannot be left open; it must be held Low when no "carry in"is intended. Interchanging inputs of equal weight does not affect the operation, thus A0, B0, C_IN can arbitrarily be assigned to pins 5, 6,7, etc.

Due to pin limitations, the intermediate carries of the 74F283 are not brought out for use as inputs or outputs. However, other means can be used to effectively insert a carry into, or bring a carry out from, an intermediate stage.