mc14560b

Manufacturer Part Numbermc14560b
DescriptionNbcd Adder
ManufacturerFreescale Semiconductor, Inc
mc14560b datasheet
 
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
NBCD Adder
The MC14560B adds two 4–bit numbers in NBCD (natural binary coded
decimal) format, resulting in sum and carry outputs in NBCD code.
This device can also subtract when one set of inputs is complemented with
a 9’s Complementer (MC14561B).
All inputs and outputs are active high. The carry input for the least
significant digit is connected to V SS for no carry in.
Diode Protection on All Inputs
Supply Voltage Range = 3.0 Vdc to 18 Vdc
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
Capable of Driving Two Low–power TTL Loads or One Low–power
Schottky TTL Load Over the Rated Temperature Range
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
MAXIMUM RATINGS*
(Voltages Referenced to V SS )
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
Symbol
Parameter
V DD
DC Supply Voltage
V in , V out
Input or Output Voltage (DC or Transient)
I in , I out
Input or Output Current (DC or Transient),
per Pin
P D
Power Dissipation, per Package†
T stg
Storage Temperature
T L
Lead Temperature (8–Second Soldering)
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/ _ C From 65 _ C To 125 _ C
Ceramic “L” Packages: – 12 mW/ _ C From 100 _ C To 125 _ C
TRUTH TABLE*
Input
A4
A3
A2
A1
B4
B3
B2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
1
0
0
0
0
1
0
1
1
1
0
1
0
0
1
1
1
0
1
0
1
0
0
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
0
* Partial truth table to show logic operation for representative input values.
This device contains protection circuitry to guard against damage
due to high static voltages or electric fields. However, precautions must
be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V in and
V out should be constrained to the range V SS
Unused inputs must always be tied to an appropriate logic voltage
level (e.g., either V SS or V DD ). Unused outputs must be left open.
REV 3
REV 0
1/94
1/94
MOTOROLA CMOS LOGIC DATA
Motorola, Inc. 1995
Motorola, Inc. 1994
Value
Unit
– 0.5 to + 18.0
V
– 0.5 to V DD + 0.5
V
10
mA
500
mW
_ C
– 65 to + 150
_ C
260
Output
B1
C in
C out
S4
S3
S2
S1
0
0
0
0
0
0
0
0
1
0
0
0
0
1
1
0
0
0
1
1
1
1
1
0
1
0
0
0
0
0
1
0
0
0
1
0
1
1
0
0
1
0
1
0
1
0
0
1
1
0
0
1
0
1
0
0
1
1
1
1
0
0
1
(V in or V out )
V DD .
MC14559B
See Page 398
MC14560B
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
ORDERING INFORMATION
MC14XXXBCP
Plastic
MC14XXXBCL
Ceramic
MC14XXXBD
SOIC
T A = – 55 to 125 C for all packages.
BLOCK DIAGRAM
7
C in
S1
13
A1
15
14
B1
S2
12
A2
1
2
B2
S3
11
3
A3
B3
4
S4
10
5
A4
B4
C out
9
6
V DD = PIN 16
V SS = PIN 8
MC14560B
1

mc14560b Summary of contents

  • Page 1

    ... MOTOROLA SEMICONDUCTOR TECHNICAL DATA NBCD Adder The MC14560B adds two 4–bit numbers in NBCD (natural binary coded decimal) format, resulting in sum and carry outputs in NBCD code. This device can also subtract when one set of inputs is complemented with a 9’s Complementer (MC14561B). All inputs and outputs are active high. The carry input for the least significant digit is connected for no carry in ...

  • Page 2

    ... The formulas given are for the typical characteristics only †To calculate total supply current at loads other than 50 pF (50 pF – 50) Vfk where (per package pF – volts kHz is input frequency, and k = 0.005. MC14560B 2 (Voltages Referenced – ...

  • Page 3

    ... V DD 90% 50% 10 PHL t PLH V OH 90% 50% 10 TLH t THL Figure 2. Switching Time Waveforms MC14560B ...

  • Page 4

    ... PIN PIN 8 One MC14560B and MC14561B permit a BCD digit to be added to or subtracted from a second digit, such as in this typical config- uration. A second MC14561B permits either digit to be added to or subtracted from the other, or either word to appear unmodified at the output ...

  • Page 5

    ... This End Around Carry is required because subtrac- tion is done in 9’s complement arithmetic. By controlling the complement and overflow logic with an add/subtract line, both addition and subtraction are per- formed using the basic subtracter blocks (Figure 4 – – – – 1 MC14560B 5 ...

  • Page 6

    ... BIT BINARY FULL ADDER C in BINARY TO NBCD C out CODE CONVERTER RESULT, R (a) MC14560 Block Diagram Figure 5. Addition of Unsigned NBCD Numbers MC14560B 6 ADDITION AND SUBTRACTION OF SIGNED NBCD NUMBERS Corrected Binary Sums Using MC14560 NBCD Adders and MC14561 9’s Comple- 0000 menters, a sign and magnitude adder/subtracter can be con- 0001 figured (Figure 5) ...

  • Page 7

    ... MC14561 RESULT, R (a) Basic Subtracter Block MOST SIGNIFICANT DECADE out (b) n–Decade Subtracter out out R n “0” INDICATES UNDERFLOW (NEGATIVE RESULT) MC14560B 7 ...

  • Page 8

    ... SUBTRACT C BLOCK R1 ADD/SUBTRACT (“1”/“0”) Figure 7. Adder/Subtracter for Unsigned NBCD Numbers MC14560B 8 REFERENCES 1. Chu, Y.: Digital Computer Design Fundamentals , New York, McGraw–Hill, 1962. 2. McMOS Handbook , Motorola Inc., 1st Edition. 3. Beuscher, H.: Electronic Switching Theory and Circuits , New York, Van Nostrand Reinhold, 1971. ...

  • Page 9

    ... Figure 8. Sign and Magnitude Adder/Subtracter with Overflow MOTOROLA CMOS LOGIC DATA MC14560B 9 ...

  • Page 10

    ... R = – A – (10 N – 1 – – Output of Adders Figure 9. Truth Table Generation for EAC, Sign, and Overflow Logic MC14560B 10 for R* (Result Modulus Modulus End Around Carry (EAC) Carry (EAC) Magnitudes) Magnitudes) Magnitudes) “1” = EAC “ ...

  • Page 11

    ... SGN = out ) + out ) = out ) 0 EAC Sign (SGN) Overflow (OVF out out = OVF MC14560B 11 ...

  • Page 12

    ... 0.25 (0.010 –A– 0.25 (0.010) M MC14560B 12 OUTLINE DIMENSIONS L SUFFIX CERAMIC DIP PACKAGE CASE 620–10 ISSUE V –B– 0.25 (0.010 SUFFIX PLASTIC DIP PACKAGE CASE 648–08 ...

  • Page 13

    ... IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 9.80 10.00 0.386 0.393 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019 are registered MC14560B MC14560B/D 13 ...