M74HC182B1R [STMICROELECTRONICS]
FUNCTION LOOK AHEAD CARRY GENERATOR; 函数查找前进位发生器
| 型号： | M74HC182B1R |
| 厂家： | 
ST |
| 描述： | FUNCTION LOOK AHEAD CARRY GENERATOR |
| 文件： | 总12页 (文件大小：262K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HC182
M74HC182
FUNCTION LOOK AHEAD CARRY GENERATOR
.
.
.
.
.
.
.
.
HIGH SPEED
PD = 14 ns (TYP.) at VCC = 5 V
LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 °C
HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V to 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS182
t
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HC182F1R
M74HC182B1R
M74HC182M1R
M74HC182C1R
DESCRIPTION
The M54/74HC182 is a high speed CMOS FUNC-
TION LOOK AHEAD CARRY GENERATOR
fabricated in silicon gate C2MOS technology. It has
the same high speed performance of LSTTL com-
bined with true CMOS low power consumption.
These circuit are capable of anticipating a carry
across four binary adders or group of adders. They
are cascadable to perform full look-ahead across n-
PIN CONNECTIONS (top view)
bit
adders.
Carry,
generate-carry,
and
propagate-carry functions are provided as shown in
the pin connection table. When used in conjunction
with the HC181 arithmetic logic unit, these gener-
ators provide high-speed carry look-ahead
capability for any word length. Each HC182 gener-
ates the look-ahead (anticipated carry) across a
groupoffour ALU’s and, in addition, other carry look-
ahead circuits may be employed to anticipate carry
across sections of four look-ahead packages up to
n-bits. The method of cascading circuits to perform
multi-level look-ahead is illustrated under typical ap-
plication data.
Carry input and output of the ALUs are in their true
form, and the carry propagate (P) and carry gener-
ate (G) are in negated form ; therefore, the carry
functions (inputs, outputs, generate, and propagate)
of the look-ahead generators are implemented in
the compatible forms for direct connection to the
ALU. Reinterpretation of carry functions as ex-
plained onthe HC181 data sheet are alsoapplicable
to and compatible with the look-ahead generator. All
inputs are equipped with protection circuits against
static discharge and transient excess voltage.
NC =
No Internal
Connection
March 1993
1/12
M54/M74HC182
FUNCTION TABLES
FOR G OUTPUT
INPUTS
OUTPUT
G3
L
G2
X
G1
X
G0
X
P3
X
L
P2
X
P1
X
G
L
X
L
X
X
X
X
L
X
X
L
X
L
L
X
L
X
X
X
L
L
L
L
L
ALL OTHER COMBINATIONS
H
FOR P OUTPUT
INPUTS
OUTPUT
P3
P2
P1
P0
P
L
L
L
L
L
ALL OTHER COMBINATIONS
H
FOR Cn+x OUTPUT
INPUTS
OUTPUT
G0
L
P0
Cn
X
Cn+x
X
H
H
L
X
L
H
ALL OTHER COMBINATIONS
FOR Cn+y OUTPUT
INPUTS
OUTPUT
G1
L
G0
P1
P0
X
Cn
X
Cn+y
X
L
X
H
H
H
L
X
L
X
X
X
X
L
L
H
ALL OTHER COMBINATIONS
FOR Cn+z OUTPUT
INPUTS
OUTPUT
G2
L
G1
X
G0
X
P2
X
L
P1
P0
Cn
X
Cn+z
X
X
L
L
X
X
X
L
H
H
H
H
L
X
L
X
X
X
X
L
L
X
X
X
X
L
H
ALL OTHER COMBINATIONS
Cn+x = G0 + P0Cn
Cn+y = G1 + P1G0 + P1P0Cn
Cn+z = G2 + P2G1 + P2P1G0 + P2P1P0Cn
G
P
= G3 + G3 + P3G2 + P3P2G1 + P3P2P1G0
= P3P2P1P0
or
Cn+x = Y0 + (X0 + Cn)
Cn+y = Y1 + [X1 + Y0(X0 + Cn)]
Cn+z = Y2 + {X2 + Y1[X1 + Y0(X0 +Cn)]}
G
P
= Y3 + (X3 + Y2)(X3 + X2 + Y1)(X3 + X2 + X1 + Y0)
= X3 + X2 + X1 + X0
2/12
M54/M74HC182
LOGIC DIAGRAM
3/12
M54/M74HC182
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCTION
3, 1, 14, 5
G0 to G3
Carry Generate Inputs
(Active LOW)
4, 2, 15, 6
7
P0 to P3
P
Carry Propagate Inputs
(Active LOW)
Carry Propagate Output
(Active LOW)
9
Cn+z
G
Function Output
10
Carry Generate Output
(Active LOW)
11
12
13
8
Cn+y
Cn+x
Cn
Function Output
Function Output
GND
VCC
Ground (0V)
16
Positive Supply Voltage
IEC LOGIC SYMBOLS
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
-0.5 to +7
Unit
V
Supply Voltage
DC Input Voltage
DC Output Voltage
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
V
VO
V
IIK
DC Input Diode Current
mA
mA
mA
mA
mW
oC
IOK
DC Output Diode Current
± 20
IO
DC Output Source Sink Current Per Output Pin
± 25
ICC or IGND DC VCC or Ground Current
± 50
PD
Tstg
TL
Power Dissipation
500 (*)
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
oC
Absolute MaximumRatingsare those values beyond whichdamage tothe device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
4/12
M54/M74HC182
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
Parameter
Value
2 to 6
Unit
V
Supply Voltage
Input Voltage
Output Voltage
0 to VCC
0 to VCC
V
VO
V
Top
Operating Temperature: M54HC Series
M74HC Series
-55 to +125
-40 to +85
oC
oC
tr, tf
Input Rise and Fall Time
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
0 to 1000
0 to 500
0 to 400
ns
DC SPECIFICATIONS
Test Conditions
VCC
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
(V)
Min. Typ. Max. Min. Max. Min. Max.
VIH
High Level Input
Voltage
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
V
VIL
Low Level Input
Voltage
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
VOH
High Level
Output Voltage
1.9
4.4
5.9
2.0
4.5
6.0
1.9
4.4
1.9
4.4
VI =
VIH
or
IO=-20 µA
V
V
5.9
5.9
VIL
IO=-6.0 mA 4.18 4.31
4.13
5.63
4.10
5.60
IO=-7.8 mA 5.68
5.8
0.0
0.0
0.0
VOL
Low Level Output 2.0
Voltage
0.1
0.1
0.1
0.1
0.1
0.1
0.1
VI =
VIH
or
IO= 20 µA
4.5
6.0
4.5
6.0
0.1
0.1
VIL
IO= 6.0 mA
IO= 7.8 mA
0.17 0.26
0.18 0.26
±0.1
0.37
0.37
±1
0.40
0.40
±1
II
Input Leakage
6.0
VI = VCC or GND
µA
µA
µA
Current
IOZ
ICC
3 State Output
Off State Current
6.0
VI = VIH or VIL
VO = VCC or GND
±0.5
±5.0
±10
Quiescent Supply 6.0 VI = VCC or GND
Current
4
40
80
5/12
M54/M74HC182
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
TA = 25 oC
54HC and 74HC
-40 to 85 oC -55 to 125 oC
Symbol
Parameter
Unit
VCC
(V)
74HC
54HC
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
30
8
75
15
95
19
110
22
ns
ns
ns
ns
ns
7
13
16
19
tPLH
tPHL
Propagation
Delay Time
(Gn, Pn - Cn+xyz)
62
17
13
72
19
14
62
17
13
62
17
13
5
135
27
170
34
205
41
23
29
35
tPLH
tPHL
Propagation
Delay Time
(Gn, Pn - G)
150
30
190
38
225
45
26
32
38
tPLH
tPHL
Propagation
Delay Time
(Pn - P)
135
27
170
34
205
41
23
29
35
tPLH
tPHL
Propagation
Delay Time
(Cn - Cn+xyz)
135
27
170
34
205
41
23
29
35
CIN
Input Capacitance
10
10
10
pF
pF
CPD (*) Power Dissipation
Capacitance
61
(*) CPD isdefined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the followingequation. ICC(opr) = CPD • VCC • fIN + ICC/2 (per FLIP/FLOP)
6/12
M54/M74HC182
SWITCHING CHARACTERISTICS TEST WAVEFORM
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST.
TYPICAL APPLICATION
64-BIT ALU, FULL-CARRY LOOK-AHEAD IN THREE LEVELS.
7/12
M54/M74HC182
Plastic DIP16 (0.25) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
0.51
0.77
TYP.
MAX.
MIN.
0.020
0.030
MAX.
a1
B
b
1.65
0.065
0.5
0.020
0.010
b1
D
E
e
0.25
20
0.787
8.5
2.54
17.78
0.335
0.100
0.700
e3
F
7.1
5.1
0.280
0.201
I
L
3.3
0.130
Z
1.27
0.050
P001C
8/12
M54/M74HC182
Ceramic DIP16/1 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
20
MIN.
MAX.
0.787
0.276
A
B
7
D
E
3.3
0.130
0.700
0.38
0.015
e3
F
17.78
2.29
0.4
2.79
0.55
1.52
0.31
1.27
10.3
8.05
5.08
0.090
0.016
0.046
0.009
0.020
0.110
0.022
0.060
0.012
0.050
0.406
0.317
0.200
G
H
L
1.17
0.22
0.51
M
N
P
7.8
0.307
Q
P053D
9/12
M54/M74HC182
SO16 (Narrow) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
1.75
0.2
MIN.
MAX.
0.068
0.007
0.064
0.018
0.010
A
a1
a2
b
0.1
0.004
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45° (typ.)
9.8
5.8
10
0.385
0.228
0.393
0.244
E
6.2
e
1.27
8.89
0.050
0.350
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.024
G
L
1.27
0.62
M
S
8° (max.)
P013H
10/12
M54/M74HC182
PLCC20 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
9.78
8.89
4.2
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
MAX.
0.395
0.356
0.180
A
B
D
4.57
d1
d2
E
2.54
0.56
0.100
0.022
7.37
8.38
0.290
0.330
0.004
e
1.27
5.08
0.38
0.050
0.200
0.015
e3
F
G
0.101
M
M1
1.27
1.14
0.050
0.045
P027A
11/12
M54/M74HC182
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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12/12
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