HCF40182B
LOOK-AHEAD CARRY GENERATOR
■
■
■
■
■
■
■
■
■
GENERATES HIGH-SPEED CARRY
ACROSS FOUR ADDERS OR ADDER
GROUPS
HIGH-SPEED OPERATIONAL: tPHL = tPLH =
100 ns (typ.) AT VDD = 10V
CASCADABLE FOR FAST CARRIES OVER
N BITS
DESIGNED FOR USE WITH HCF40181B
ALU
STANDARDIZED, SYMMETRICAL OUTPUT
CHARACTERISTICS
QUIESCENT CURRENT SPECIFIED UP TO
20V
INPUT LEAKAGE CURRENT
II = 100nA (MAX) AT VDD = 18V TA = 25°C
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC
JESD13B "STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
DESCRIPTION
HCF40182B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
He is a high speed look-ahead carry generator
capable of anticipating a carry across four binary
adders or adder groups. HCF40182B is
cascadable to perform full look-ahead across n-bit
adders.
Carry
propagate-carry,
and
generate-carry functions are provided as
DIP
SOP
ORDER CODES
PACKAGE
TUBE
T&R
DIP
SOP
HCF40182BEY
HCF40182BM1
HCF40182M013TR
enumerated in the terminal designation below.
HCF40182B, when used in conjunction with the
HCF40181B arithmetic logic unit (ALU), provides
full high-speed look-ahead carry capability for up
to n-bit words. Each HCF40182B generates the
look-ahead (anticipated carry) across a group of
four ALUs. In addition, other HCF40182Bs may be
emplayed to anticipate the carry across sections
of four look-ahead blocks up to n-bits.
PIN CONNECTION
September 2002
1/10
HCF40182B
IINPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
3, 1, 14, 5
G0 to G3
4, 2, 15, 6
P0 to P3
13
12, 11, 9
10
7
8
16
NAME AND FUNCTION
Carry Generate Inputs
(Active LOW)
Carry Propagate Inputs
(Active LOW)
Active-high Carry Input
Cn
Cn+x, Cn+y,
Active-high Carry Outputs
Cn+z
Carry Propagate Output
G
(Active LOW)
Carry Generate Output
P
(Active LOW)
Vss
Negative Supply Voltage
Vdd
Positive Supply Voltage
FUNCTIONAL DIAGRAM
TRUTH TABLES
FOR G OUTPUT
INPUTS
G3
G2
L
X
X
X
X
L
X
X
G1
OUTPUT
G0
P3
P2
P1
G
X
X
X
X
X
L
L
X
L
X
L
L
ALL OTHER COMBINATIONS
X
X
L
L
X
X
X
L
L
L
L
L
H
FOR P OUTPUT
INPUTS
P3
L
2/10
P2
OUTPUT
P1
L
L
ALL OTHER COMBINATIONS
P0
P
L
L
H
HCF40182B
FOR Cn+x OUTPUT
INPUTS
OUTPUT
G0
P0
Cn
Cn+x
L
X
X
L
ALL OTHER COMBINATIONS
X
H
H
H
L
FOR Cn+y OUTPUT
INPUTS
OUTPUT
G1
G0
P1
P0
Cn
Cn+y
L
X
X
X
L
X
X
L
L
ALL OTHER COMBINATIONS
X
X
L
X
X
H
H
H
H
L
FOR Cn+z OUTPUT
INPUTS
G2
G1
L
X
X
X
X
L
X
X
GO
P2
OUTPUT
P1
P0
Cn
Cn+z
X
X
X
X
L
X
L
L
L
X
L
L
ALL OTHER COMBINATIONS
X
X
X
L
X
X
X
H
H
H
H
H
L
X : Don’t Care
Cn+x = G0+P0Cn
Cn+y = G1+P1G0+P1P0Cn
Cn+z = G2+P2G1+P2P1G0+P2P1P0Cn
G = G3+G3+P3G2+P3P2G1+P3P2P1G0
P = P3P2P1P0
or
Cn+x = Y0+(X0+Cn)
Cn+y = Y1+[X1+Y0(X0+Cn)]
Cn+z = Y2+{X2+Y1[X1+Y0(X0+Cn)]}
G = Y3+(X3+Y2)(X3+X2+Y1)(X3+X2+X1+Y0)
P = X3+X2+X1+X0
3/10
HCF40182B
LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
Parameter
Supply Voltage
Value
Unit
-0.5 to +22
V
VI
DC Input Voltage
-0.5 to VDD + 0.5
V
II
DC Input Current
± 10
mA
200
100
mW
mW
Top
Power Dissipation per Package
Power Dissipation per Output Transistor
Operating Temperature
-55 to +125
°C
Tstg
Storage Temperature
-65 to +150
°C
PD
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage values are referred to VSS pin voltage.
RECOMMENDED OPERATING CONDITIONS
Symbol
VDD
4/10
Parameter
Supply Voltage
VI
Input Voltage
Top
Operating Temperature
Value
Unit
3 to 20
V
0 to VDD
V
-55 to 125
°C
HCF40182B
DC SPECIFICATIONS
Test Conditions
Symbol
IL
VOH
VOL
VIH
VIL
IOH
IOL
II
CI
Parameter
Quiescent Current
High Level Output
Voltage
Low Level Output
Voltage
VI
(V)
Low Level Input
Voltage
Output Drive
Current
Output Sink
Current
Input Leakage
Current
Input Capacitance
IO VDD
(µA) (V)
VO
(V)
0/5
0/10
0/15
0/20
0/5
0/10
0/15
5/0
10/0
15/0
High Level Input
Voltage
0/5
0/5
0/10
0/15
0/5
0/10
0/15
0/18
Value
0.5/4.5
1/9
1.5/18.5
0.5/4.5
9/1
1.5/18.5
2.5
4.6
9.5
13.5
0.4
0.5
1.5
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
any input
any input
5
10
15
20
5
10
15
5
10
15
5
10
15
5
10
15
5
5
10
15
5
10
15
18
TA = 25°C
Min.
Typ.
Max.
0.04
0.04
0.04
0.08
5
10
20
100
4.95
9.95
14.95
-40 to 85°C
-55 to 125°C
Min.
Min.
150
300
600
3000
4.95
9.95
14.95
0.05
0.05
0.05
4.95
9.95
14.95
3.5
7
11
1.5
3
4
-3.2
-1
-2.6
-6.8
1
2.6
6.8
±0.1
5
7.5
0.05
0.05
0.05
1.5
3
4
V
V
1.5
3
4
-1.1
-0.36
-0.9
-2.4
0.36
0.9
2.4
±1
µA
V
3.5
7
11
-1.1
-0.36
-0.9
-2.4
0.36
0.9
2.4
±10-5
Max.
150
300
600
3000
0.05
0.05
0.05
3.5
7
11
-1.36
-0.44
-1.1
-3.0
0.44
1.1
3.0
Max.
Unit
V
mA
mA
±1
µA
pF
The Noise Margin for both "1" and "0" level is: 1V min. with VDD =5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
DYNAMIC ELECTRICAL CHARACTERISTICS (Tamb = 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns)
Test Condition
Symbol
Parameter
tPLH tPHL Propagation Delay Time
P, G, in to P
G Out and Carry Outs
tPLH tPHL Cn to Carry Outputs
tTHL tTLH Transition Time
VDD (V)
5
10
15
5
10
15
5
10
15
See Timing Chart
Value (*)
Min.
Unit
Typ.
Max.
200
100
75
240
120
90
100
50
40
400
200
150
480
240
180
200
100
80
ns
ns
ns
(*) Typical temperature coefficient for all VDD value is 0.3 %/°C.
5/10
HCF40182B
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = 200KΩ
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle)
6/10
HCF40182B
TYPICAL APPLICATION: 16-BIT TWO- LEVEL LOOK-AHEAD ALU
TYPICAL APPLICATION: 64-BIT FULL CARRY LOOK-AHEAD ALU IN 3 LEVELS
TYPICAL APPLICATION: COMBINED TWO-LEVEL LOOK-AHEAD AND RIPPLE-CARRY ALU
7/10
HCF40182B
Plastic DIP-16 (0.25) MECHANICAL DATA
mm.
inch
DIM.
MIN.
a1
0.51
B
0.77
TYP
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
0.050
P001C
8/10
HCF40182B
SO-16 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.003
0.007
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45˚ (typ.)
D
9.8
E
5.8
10
0.385
6.2
0.228
0.393
0.244
e
1.27
0.050
e3
8.89
0.350
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.62
0.024
8 ˚ (max.)
PO13H
9/10
HCF40182B
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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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