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INTEGRATED CIRCUITS
74F283 4-bit binary full adder with fast carry
Product specification IC15 Data Handbook 1989 Mar 03
Philips Semiconductors
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
FEATURES
* High speed 4-bit addition * Cascadable in 4-bit increments * Fast Internal carry look-ahead
DESCRIPTION
The 74F283 adds two 4-bit binary words (An plus Bn) plus the incoming carry. The binary sum appears on the sum outputs (0-3) and the outgoing carry (COUT) according to the equation: CIN+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, CIN 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, CIN 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.
PIN CONFIGURATION
1 B1 A1 0 A0 B0 CIN GND 1 2 3 4 5 6 7 8 16 VCC 15 B2 14 A2 13 2 12 A3 11 B3
10 3 9 COUT
SF00852
TYPE 74F283
TYPICAL PROPAGATION DELAY 6.5ns
TYPICAL SUPPLY CURRENT (TOTAL) 40mA
ORDERING INFORMATION
DESCRIPTION 16-pin plastic DIP 16-pin plastic SO COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F283N N74F283D PKG DWG # SOT38-4 SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0 - A3 B0 - B3 CIN COUT 0-3 DESCRIPTION A operand inputs B operand inputs Carry input Carry output Sum outputs 74F(U.L.) HIGH/LOW 1.0/2.0 1.0/2.0 1.0/1.0 50/33 50/33 LOAD VALUE HIGH/LOW 20A/1.2mA 20A/1.2mA 20A/0.6mA 1.0mA/20mA 1.0mA/20mA
NOTE: One (1.0) FAST Unit Load is defined as: 20A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
5 0 P 3 6 2 15 11 4 1 13 10 7 CI CO 9 3 Q 0 3 0 4 1 13 10
5
6
3
2
14 15 12 11
3 14
A0 B0 A1 B1 A2 B2 A3 B3 7 CIN 0 1 2 3 COUT 9
12
VCC=Pin 16 GND=Pin 8
SF00853
SF00854
1989 Mar 03
2
853-0364 95944
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
LOGIC DIAGRAM
9 COUT
B3
11
A3
12
10
3
B2
15
A2
14
13
2
B1
2
1 A1 3
1
B0
6
4 A0 VCC=Pin 16 GND=Pin 8 CIN 5 7
0
SF00855
FUNCTION TABLE
PINS Logic levels Active High Active Low CIN L 0 1 A0 L 0 1 A1 H 1 0 A2 L 0 1 A3 H 1 0 B0 H 1 0 B1 L 0 1 B2 L 0 1 B3 H 1 0 0 H 1 0 1 H 1 0 2 L 0 1 3 L 0 1 COUT H 1 0 Example: 1001 1010 10011 (10+9=19) (carry+5+6=12)
H = High voltage level L = Low voltage level
1989 Mar 03
3
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
Figure A shows how to make a 3-bit adder. Tying the operand inputs of the fourth adder (A3, B3) Low makes 3 dependent only on, and equal to, the carry from the third adder. Using somewhat the same principle, Figure B shows a way of dividing the 74F283 into a 2-bit and a 1-bit adder. The third stage adder (A2, B2, 2) is used as means of getting a carry (C10) signal into the fourth stage adder (via A2 and B2) and bringing out the carry from the second stage on 2. Note that as long as A2 and B2 are the same, whether High or Low,
they do not influence 2. Similarly, when A2 and B2 are the same, the carry into the third stage does not influence the carry out of the third stage. Figure C shows a method of implementing a 5-input encoder where the inputs are equally weighted. The outputs 0, 1 and 2 present a binary number of inputs I0-I4 that are true. Figure D shows one method of implementing a 5-input majority gate. When three or more of the inputs I0-I4 are true, the output M4 is true.
APPLICATIONS
C10 L A0 B0 A1 B1 A2 B2 A3 B3 CIN 0 1 2 3 C3 COUT CIN A0 B0 A1 B1 A10 B10
A0 B0 A1 B1 A2 B2 A3 B3 CIN 0 1 2 3 COUT C11
0
1
C2
10
A.
3-bit Adder
B.
2-bit and 1-bit Adder
I2 I0 I1 L I3 I4 I0 I1
I2 I3 I4
A0 B0 A1 B1 A2 B2 A3 B3 CIN 0 1 2 3 COUT
A0 B0 A1 B1 A2 B2 A3 B3 CIN 0 1 2 3 COUT
20
21
22
C.
5-input Encoder D.
M4
5-input Majority Gate
SF00856
1989 Mar 03
4
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
ABSOLUTE MAXIMUM RATINGS
(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 VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state Operating free-air temperature range Storage temperature PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 40 0 to +70 -65 to +150 UNIT V V mA V mA C C
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VIH VIL IIK IOH IOL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature range 0 PARAMETER LIMITS Min 4.5 2.0 0.8 -18 -1 20 70 Nom 5.0 Max 5.5 UNIT V V V mA mA mA C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) LIMITS SYMBOL PARAMETER TEST CONDITIONSNO TAG VCC = MIN, VIL = MAX VIH = MIN, IOH = MAX Low-level Low level output voltage Input clamp voltage Input current at maximum input voltage High-level input current Low-level Low level input current CIN only An, Bn Short-circuit output currentNO TAG Supply current (total)4 VCC = MIN, VIL = MAX VIH = MIN, IOL = MAX VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0 5V MAX 0.5V VCC = MAX VCC = MAX -60 40 10%VCC 5%VCC 10%VCC 5%VCC MIN 2.5 V 2.7 3.4 0.30 0.30 -0.73 0.50 V 0.50 -1.2 100 20 -0.6 -1.2 -150 55 V A A mA mA mA mA TYP
NO TAG
MAX
UNIT
VO OH
High-level High level output voltage
VO OL VIK II IIH IIL IOS ICC
NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. 2. All typical values are at VCC = 5V, Tamb = 25C. 3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last. 4. ICC should be measured with all outputs open and the following conditions: Condition1: all inputs grounded Condition 2: all B inputs Low, other inputs at 4.5V Condition 3: all inputs at 4.5V
1989 Mar 03
5
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Propagation delay CIN to i Propagation delay Ai or Bi to i Propagation delay CIN to COUT Propagation delay Ai or Bi to COUT Waveform 1, 2 Waveform 1, 2 Waveform 2 Waveform 1, 2 3.5 4.0 3.5 3.5 3.5 3.0 3.5 2.5 Tamb= +25C VCC = +5 V +5.V CL = 50pF, RL = 500 TYP 7.0 7.0 7.0 7.0 5.7 5.4 5.7 5.3 MAX 9.5 9.5 9.5 9.5 7.5 7.0 7.5 7.0 Tamb = 0C to +70C VCC = +5.V 10% +5 V CL = 50pF, RL = 500 MIN 3.0 3.5 2.5 3.5 3.5 2.5 3.0 2.5 MAX 10.5 10.5 10.5 10.5 8.5 8.0 8.5 8.0 ns ns ns ns ns ns ns ns UNIT
AC WAVEFORMS
For all waveforms, VM=1.5V.
Ai, Bi, CIN VM VM
Ai, Bi, CIN
VM
VM
tPLH
tPHL i, COUT
tPHL
tPLH
i, COUT
VM
VM
VM
VM
SF00857
SF00858
Waveform 1. Propagation Delay Operands and Carry Inputs to Outputs
Waveform 2. Propagation Delay Operands and Carry Inputs to Outputs
TEST CIRCUIT AND WAVEFORM
VCC NEGATIVE PULSE VIN PULSE GENERATOR RT D.U.T. VOUT 90% VM 10% tTHL (tf ) CL RL tw VM 10% tTLH (tr ) 0V 90% AMP (V)
tTLH (tr ) 90% POSITIVE PULSE VM 10% tw
tTHL (tf ) AMP (V) 90% VM 10% 0V
Test Circuit for Totem-Pole Outputs DEFINITIONS: RL = Load resistor; see AC ELECTRICAL CHARACTERISTICS for value. CL = Load capacitance includes jig and probe capacitance; see AC ELECTRICAL CHARACTERISTICS for value. RT = Termination resistance should be equal to ZOUT of pulse generators.
Input Pulse Definition INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00006
1989 Mar 03
6
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
1989 Mar 03
7
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1989 Mar 03
8
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
NOTES
1989 Mar 03
9
Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74F283
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1999 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 04-99 9397-750-05591
Philips Semiconductors
1989 Mar 03 10

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