MC14008B
4-Bit Full Adder
The MC14008B 4±bit full adder is constructed with MOS P±channel and N±channel enhancement mode devices in a single monolithic structure. This device consists of four full adders with fast internal look±ahead carry output. It is useful in binary addition and other arithmetic applications. The fast parallel carry output bit allows high±speed operation when used with other adders in a system.
•Look±Ahead Carry Output
•Diode Protection on All Inputs
•All Outputs Buffered
•Supply Voltage Range = 3.0 Vdc to 18 Vdc
•Capable of Driving Two Low±power TTL Loads or One Low±power Schottky TTL Load Over the Rated Temperature Range
•Pin±for±Pin Replacement for CD4008B
MAXIMUM RATINGS (Voltages Referenced to VSS) (Note 2.)
Symbol |
Parameter |
Value |
Unit |
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VDD |
DC Supply Voltage Range |
± 0.5 to +18.0 |
V |
Vin, Vout |
Input or Output Voltage Range |
± 0.5 to VDD + 0.5 |
V |
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(DC or Transient) |
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Iin, Iout |
Input or Output Current |
± 10 |
mA |
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(DC or Transient) per Pin |
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PD |
Power Dissipation, |
500 |
mW |
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per Package (Note 3.) |
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TA |
Ambient Temperature Range |
± 55 to +125 |
°C |
Tstg |
Storage Temperature Range |
± 65 to +150 |
°C |
TL |
Lead Temperature |
260 |
°C |
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(8±Second Soldering) |
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2.Maximum Ratings are those values beyond which damage to the device may occur.
3.Temperature Derating:
Plastic ªP and D/DWº Packages: ± 7.0 mW/C From 65_C To 125_C
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, Vin and Vout should be constrained
to the range VSS v (Vin or Vout) v VDD.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD). Unused outputs must be left open.
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MARKING |
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DIAGRAMS |
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16 |
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PDIP±16 |
MC14008BCP |
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P SUFFIX |
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AWLYYWW |
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CASE 648 |
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1 |
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16 |
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SOIC±16 |
14008B |
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D SUFFIX |
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AWLYWW |
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CASE 751B |
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1 |
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16 |
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SOEIAJ±16 |
MC14008B |
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F SUFFIX |
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AWLYWW |
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CASE 966 |
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1 |
A |
= Assembly Location |
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WL or L = Wafer Lot |
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YY or Y |
= Year |
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WW or W = Work Week |
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ORDERING INFORMATION |
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Device |
Package |
Shipping |
MC14008BCP |
PDIP±16 |
2000/Box |
MC14008BDR2 |
SOIC±16 |
2500/Tape & Reel |
MC14008BF |
SOEIAJ±16 |
See Note 1. |
1.For ordering information on the EIAJ version of the SOIC packages, please contact your local ON Semiconductor representative.
Semiconductor Components Industries, LLC, 2000 |
1 |
Publication Order Number: |
March, 2000 ± Rev. 3 |
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MC14008B/D |
MC14008B
TRUTH TABLE
(One Stage)
Cin |
B |
A |
Cout |
S |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
0 |
1 |
0 |
1 |
1 |
1 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
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PIN ASSIGNMENT
A4 |
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1 |
16 |
VDD |
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B3 |
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2 |
15 |
B4 |
A3 |
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3 |
14 |
Cout |
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B2 |
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4 |
13 |
S4 |
A2 |
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5 |
12 |
S3 |
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B1 |
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6 |
11 |
S2 |
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A1 |
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7 |
10 |
S1 |
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VSS |
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8 |
9 |
Cin |
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BLOCK DIAGRAM
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HIGH±SPEED |
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14 |
Cout |
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PARALLEL CARRY |
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B4 |
15 |
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ADDER |
13 |
S4 |
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A4 |
1 |
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4 |
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C4 |
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B3 |
2 |
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ADDER |
12 |
S3 |
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A3 |
3 |
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3 |
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C3 |
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B2 |
4 |
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ADDER |
11 |
S2 |
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A2 |
5 |
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2 |
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C2 |
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B1 |
6 |
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ADDER |
10 |
S1 |
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A1 |
7 |
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1 |
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Cin |
9 |
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VDD = PIN 16 |
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VSS = PIN 8 |
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MC14008B
ELECTRICAL CHARACTERISTICS (Voltages Referenced to VSS)
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VDD |
± 55_C |
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25_C |
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125_C |
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Characteristic |
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Symbol |
Vdc |
Min |
Max |
Min |
Typ (4.) |
Max |
Min |
Max |
Unit |
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Output Voltage |
ª0º Level |
VOL |
5.0 |
Ð |
0.05 |
Ð |
0 |
0.05 |
Ð |
0.05 |
Vdc |
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Vin = VDD or 0 |
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10 |
Ð |
0.05 |
Ð |
0 |
0.05 |
Ð |
0.05 |
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15 |
Ð |
0.05 |
Ð |
0 |
0.05 |
Ð |
0.05 |
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Vin = 0 or VDD |
ª1º Level |
VOH |
5.0 |
4.95 |
Ð |
4.95 |
5.0 |
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Ð |
4.95 |
Ð |
Vdc |
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10 |
9.95 |
Ð |
9.95 |
10 |
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Ð |
9.95 |
Ð |
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15 |
14.95 |
Ð |
14.95 |
15 |
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Ð |
14.95 |
Ð |
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Input Voltage |
ª0º Level |
VIL |
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Vdc |
(VO = 4.5 or 0.5 Vdc) |
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5.0 |
Ð |
1.5 |
Ð |
2.25 |
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1.5 |
Ð |
1.5 |
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(VO = 9.0 or 1.0 Vdc) |
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10 |
Ð |
3.0 |
Ð |
4.50 |
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3.0 |
Ð |
3.0 |
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(VO = 13.5 or 1.5 Vdc) |
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15 |
Ð |
4.0 |
Ð |
6.75 |
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4.0 |
Ð |
4.0 |
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(VO = 0.5 or 4.5 Vdc) |
ª1º Level |
VIH |
5.0 |
3.5 |
Ð |
3.5 |
2.75 |
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Ð |
3.5 |
Ð |
Vdc |
(VO = 1.0 or 9.0 Vdc) |
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10 |
7.0 |
Ð |
7.0 |
5.50 |
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Ð |
7.0 |
Ð |
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(VO = 1.5 or 13.5 Vdc) |
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15 |
11 |
Ð |
11 |
8.25 |
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Ð |
11 |
Ð |
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Output Drive Current |
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IOH |
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mAdc |
(VOH = 2.5 Vdc) |
Source |
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5.0 |
± 3.0 |
Ð |
± 2.4 |
± 4.2 |
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Ð |
± 1.7 |
Ð |
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(VOH = 4.6 Vdc) |
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5.0 |
± 0.64 |
Ð |
± 0.51 |
± 0.88 |
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Ð |
± 0.36 |
Ð |
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(VOH = 9.5 Vdc) |
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10 |
± 1.6 |
Ð |
± 1.3 |
± 2.25 |
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Ð |
± 0.9 |
Ð |
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(VOH = 13.5 Vdc) |
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15 |
± 4.2 |
Ð |
± 3.4 |
± 8.8 |
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Ð |
± 2.4 |
Ð |
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(VOL = 0.4 Vdc) |
Sink |
IOL |
5.0 |
0.64 |
Ð |
0.51 |
0.88 |
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Ð |
0.36 |
Ð |
mAdc |
(VOL = 0.5 Vdc) |
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10 |
1.6 |
Ð |
1.3 |
2.25 |
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Ð |
0.9 |
Ð |
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(VOL = 1.5 Vdc) |
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15 |
4.2 |
Ð |
3.4 |
8.8 |
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Ð |
2.4 |
Ð |
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Input Current |
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Iin |
15 |
Ð |
± 0.1 |
Ð |
± 0.00001 |
± 0.1 |
Ð |
± 1.0 |
μAdc |
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Input Capacitance |
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Cin |
Ð |
Ð |
Ð |
Ð |
5.0 |
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7.5 |
Ð |
Ð |
pF |
(Vin = 0) |
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Quiescent Current |
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IDD |
5.0 |
Ð |
5.0 |
Ð |
0.005 |
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5.0 |
Ð |
150 |
μAdc |
(Per Package) |
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10 |
Ð |
10 |
Ð |
0.010 |
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10 |
Ð |
300 |
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15 |
Ð |
20 |
Ð |
0.015 |
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20 |
Ð |
600 |
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Total Supply Current (5.) (6.) |
I |
5.0 |
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I = (1.7 μA/kHz) f + I |
DD |
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μAdc |
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T |
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T |
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(Dynamic plus Quiescent, |
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10 |
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IT = (3.4 μA/kHz) f + IDD |
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Per Package) |
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15 |
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IT = (5.0 μA/kHz) f + IDD |
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(CL = 50 pF on all outputs, all |
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buffers switching) |
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4.Data labelled ªTypº is not to be used for design purposes but is intended as an indication of the IC's potential performance.
5.The formulas given are for the typical characteristics only at 25_C.
6.To calculate total supply current at loads other than 50 pF:
IT(CL) = IT(50 pF) + (CL ± 50) Vfk
where: IT is in μA (per package), CL in pF, V = (VDD ± VSS) in volts, f in kHz is input frequency, and k = 0.005.
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