MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC14582B
Look-Ahead Carry Block
The MC14582B is a CMOS look–ahead carry generator capable of
anticipating a carry across four binary adders or groups of adders. The
device is cascadable to perform full look–ahead across n–bit adders. Carry,
generate–carry, and propagate–carry functions are provided as enumerated
in the pin designation table shown below.
•
•
•
•
•
•
Expandable to any Number of Bits
All Buffered Outputs
Low Power Dissipation
Diode Protection on All Inputs
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
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
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ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
MAXIMUM RATINGS*
(Voltages Referenced to VSS)
Symbol
VDD
Parameter
DC Supply Voltage
Value
Unit
V
V
mA
– 0.5 to + 18.0
Vin, Vout
Iin, Iout
PD
Tstg
TL
Input or Output Voltage (DC or Transient)
Input or Output Current (DC or Transient),
per Pin
Power Dissipation, per Package†
Storage Temperature
Lead Temperature (8–Second Soldering)
– 0.5 to VDD + 0.5
±
10
500
– 65 to + 150
260
mW
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBD
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
PIN ASSIGNMENT
_
C
_
C
G1
P1
G0
P0
G3
P3
P
VSS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
P2
G2
Cin
Cn+x
Cn+y
G
Cn+z
* 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
LOGIC EQUATIONS
Cn+x = G0 + (P0
Cn)
Cn+y = G1 + (P1
G0) + (P1
P0
Cn)
Cn+z = G2 + (P2
G1) + (P2
P1 G0) + (P2
P1
P0
Cn)
G = G3 + (P3
G2) + (P3
P2
G1) + (P1
P2
P3
G0)
P = P3
P2
P1
P0
PIN DESIGNATIONS
Designation
G0, G1, G2, G3
P0, P1, P2, P3
Cn
Cn+x, Cn+y
Cn+z
G
P
Pin No’s
3, 1, 14, 5
4, 2, 15, 6
13
12, 11, 9
10
7
Function
Active–Low
Carry–Generate Inputs
Active–Low
Carry–Propagate Inputs
Carry Input
Carry Outputs
Active–Low Group
Carry–Generate Output
Active–Low Group
Carry–Propagate Output
REV 3
1/94
©
MOTOROLA CMOS LOGIC DATA
Motorola, Inc. 1995
MC14582B
1
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ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ELECTRICAL CHARACTERISTICS
(Voltages Referenced to VSS)
Characteristic
Symbol
VOL
VDD
Vdc
5.0
10
15
5.0
10
15
5.0
10
15
VIH
5.0
10
15
IOH
Source
5.0
5.0
10
15
IOL
5.0
10
15
15
—
5.0
10
15
5.0
10
15
– 3.0
– 0.64
– 1.6
– 4.2
0.64
1.6
4.2
—
—
—
—
—
—
—
—
—
—
—
—
±
0.1
—
5.0
10
20
– 2.4
– 0.51
– 1.3
– 3.4
0.51
1.3
3.4
—
—
—
—
—
– 4.2
– 0.88
– 2.25
– 8.8
0.88
2.25
8.8
±
0.00001
5.0
0.005
0.010
0.015
—
—
—
—
—
—
—
±
0.1
7.5
5.0
10
20
– 1.7
– 0.36
– 0.9
– 2.4
0.36
0.9
2.4
—
—
—
—
—
—
—
—
—
—
—
—
±
1.0
—
150
300
600
mAdc
3.5
7.0
11
—
—
—
3.5
7.0
11
2.75
5.50
8.25
—
—
—
3.5
7.0
11
—
—
—
mAdc
Min
—
—
—
– 55
_
C
25
_
C
125
_
C
Max
Min
—
—
—
Typ #
0
0
0
Max
Min
—
—
—
Max
Unit
Vdc
Output Voltage
Vin = VDD or 0
“0” Level
0.05
0.05
0.05
—
—
—
1.5
3.0
4.0
0.05
0.05
0.05
—
—
—
1.5
3.0
4.0
0.05
0.05
0.05
—
—
—
1.5
3.0
4.0
Vdc
“1” Level
Vin = 0 or VDD
Input Voltage
“0” Level
(VO = 4.5 or 0.5 Vdc)
(VO = 9.0 or 1.0 Vdc)
(VO = 13.5 or 1.5 Vdc)
“1” Level
(VO = 0.5 or 4.5 Vdc)
(VO = 1.0 or 9.0 Vdc)
(VO = 1.5 or 13.5 Vdc)
Output Drive Current
(VOH = 2.5 Vdc)
(VOH = 4.6 Vdc)
(VOH = 9.5 Vdc)
(VOH = 13.5 Vdc)
(VOL = 0.4 Vdc)
(VOL = 0.5 Vdc)
(VOL = 1.5 Vdc)
Input Current
Input Capacitance
(Vin = 0)
Quiescent Current
(Per Package)
Total Supply Current**†
(Dynamic plus Quiescent,
Per Package)
(CL = 50 pF on all outputs, all
buffers switching)
VIL
—
—
—
—
—
—
2.25
4.50
6.75
—
—
—
VOH
4.95
9.95
14.95
4.95
9.95
14.95
5.0
10
15
4.95
9.95
14.95
Vdc
Vdc
Sink
Iin
Cin
IDD
µAdc
pF
µAdc
IT
IT = (1.4
µA/kHz)
f + IDD
IT = (2.8
µA/kHz)
f + IDD
IT = (4.3
µA/kHz)
f + IDD
µAdc
#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
** The formulas given are for the typical characteristics only at 25
_
C.
†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.
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
≤
(Vin or Vout)
≤
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.
MC14582B
2
MOTOROLA CMOS LOGIC DATA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
SWITCHING CHARACTERISTICS*
(CL = 50 pF, TA = 25
_
C)
Characteristic
Output Rise and Fall Time
tTLH, tTHL = (1.5 ns/pF) CL + 25 ns
tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns
tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns
Propagation Delay Time
tPLH, tPHL = (1.7 ns/pF) CL + 260 ns
tPLH, tPHL = (0.66 ns/pF) CL + 107 ns
tPLH, tPHL = (0.5 ns/pF) CL + 85 ns
Symbol
tTLH,
tTHL
VDD
5.0
10
15
5.0
10
15
Min
—
—
—
—
—
—
Typ #
100
50
40
345
140
110
Max
200
100
80
690
280
220
Unit
ns
tPLH,
tPHL
ns
* The formulas given are for the typical characteristics only at 25
_
C.
#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
VDD
Cin
G0
20 ns
Vin
90%
50%
VARIABLE
WIDTH
20 ns
VDD
10% V
SS
PULSE
GENERATOR
G1
G2
G3
Vin
P0
P1
P2
P3
Cn+x
Cn+y
CL
Cn+z
P
CL
G
CL
CL
CL
Figure 1. Dynamic Power Dissipation
Test Circuit and Waveform
VDD
16
Cin
G0
G1
G2
G3
P0
P1
P2
P3
Vout = VOH
VDD
16
Cin
G0
G1
G2
G3
P0
P1
P2
P3
Vout = VOL
Cn+x
Cn+y
Cn+z
P
G
IOH
Cn + x
Cn + y
Cn + z
P
G
IOL
8
VSS
EXTERNAL
POWER
SUPPLY
8
VSS
EXTERNAL
POWER
SUPPLY
Figure 2. Source Current Test Circuit
Figure 3. Sink Current Test Circuit
MOTOROLA CMOS LOGIC DATA
MC14582B
3
TEST TABLE
AC Paths
Input
P0
VDD
Cin
G0
G1
G2
G3
P0
P1
P2
P3
Vout
G0
Cn+x
Cn+y
Cn+z
P
G
CL
Cn
Cn+x, Cn+y,
Cn+z
20 ns
Vin
tPLH
Vout
tTLH
90%
50%
10%
tPHL
G
Output
P
DC Data
To VSS
To VDD
Remaining
G’s
P’s, Cn
P’s, Cn
Remaining
G’s
P’s
20 ns
VDD
VSS
VOH
VOL
tTHL
G’s
PULSE
GENERATOR
SEE
TEST
TABLE
VSS
Figure 4. Switching Time Test Circuit and Waveforms
TYPICAL APPLICATIONS
MC14581B
Cn Cn+4
Cn
Cn+4
Cn
Cn+4
Cn Cn+4
16–BIT ALU, RIPPLE CARRY
MC14581B
Cn
Cn
Cn
Cn Cn+4
G P
G P
G P
G P
G0 P0 Cn+x
Cn
G1 P1 Cn+y
G2 P2 Cn+z
MC14582B
G3 P3
G P
16–BIT ALU, TWO LEVEL LOOK–AHEAD
MC14581B
Cn
Cn
Cn
Cn
Cn+4
G P
Cn
Cn
Cn
Cn Cn+4
G P
G P
G P
G P
G P
G P
G P
G0 P0 Cn+x
Cn
G1 P1 Cn+y
G2 P2 Cn+z
MC14582B
G3 P3
G P
Cn
G0 P0 Cn+x
G1 P1 Cn+y
G2 P2 Cn+z
MC14582B
G3 P3
G P
32–BIT ALU, TWO LEVEL LOOK–AHEAD OVER 16–BIT GROUPS
MC14581B
Cn
Cn+4
Cn+4
Cn
Cn
Cn
Cn Cn+4
G P
Cn Cn+4
Cn
Cn
G P
G P
G P
G P
G P
G0 P0 Cn+x
Cn
G1 P1
Cn+y
G2 P2 Cn+z
MC14582B
G3 P3
G P
G0 P0 Cn+x
G1 P1
Cn
MC14582B
Cn+y
COMBINED TWO–LEVEL LOOK–AHEAD AND RIPPLE CARRY ALU
MC14581B
Cn
Cn
Cn
Cn
Cn
Cn
Cn
Cn
Cn+4
G P
Cn
G P
G P
G
P
G P
G P
G P
G P
G P
G0 P0 Cn+x
Cn
G1 P1 Cn+y
G2 P2 Cn+z
MC14582B
G3 P3
G P
G0 P0 Cn+x
Cn
G1 P1 Cn+y
G2 P2 Cn+z
MC14582B
G3 P3
G P
G0 P0 Cn+x
Cn MC14582B
G0 P0
Cn
Cn+x
MC14582B
G1 P1
Cn+y
64–BIT ALU, FULL–CARRY LOOK–AHEAD IN THREE LEVELS.
A AND B INPUTS AND F OUTPUTS ARE NOT SHOWN (MC14581B).
MC14582B
4
MOTOROLA CMOS LOGIC DATA
OUTLINE DIMENSIONS
L SUFFIX
CERAMIC DIP PACKAGE
CASE 620–10
ISSUE V
–A–
16
9
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION F MAY NARROW TO 0.76 (0.030)
WHERE THE LEAD ENTERS THE CERAMIC
BODY.
DIM
A
B
C
D
E
F
G
H
K
L
M
N
INCHES
MIN
MAX
0.750
0.785
0.240
0.295
–––
0.200
0.015
0.020
0.050 BSC
0.055
0.065
0.100 BSC
0.008
0.015
0.125
0.170
0.300 BSC
0
_
15
_
0.020
0.040
MILLIMETERS
MIN
MAX
19.05
19.93
6.10
7.49
–––
5.08
0.39
0.50
1.27 BSC
1.40
1.65
2.54 BSC
0.21
0.38
3.18
4.31
7.62 BSC
0
_
15
_
0.51
1.01
–B–
1
8
C
L
–T–
SEATING
PLANE
N
E
F
D
G
16 PL
K
M
J
16 PL
0.25 (0.010)
M
M
T B
S
0.25 (0.010)
T A
S
P SUFFIX
PLASTIC DIP PACKAGE
CASE 648–08
ISSUE R
–A–
16
9
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
DIM
A
B
C
D
F
G
H
J
K
L
M
S
INCHES
MIN
MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.70
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0.305
0
_
10
_
0.020
0.040
MILLIMETERS
MIN
MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
7.74
0
_
10
_
0.51
1.01
B
1
8
F
S
C
L
–T–
H
G
D
16 PL
SEATING
PLANE
K
J
T A
M
M
0.25 (0.010)
M
MOTOROLA CMOS LOGIC DATA
MC14582B
5
Embedded System
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