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What is 74F182?

This electronic component, produced by the manufacturer "Philips", performs the same function as "Look-ahead carry generator".


74F182 Datasheet PDF - Philips

Part Number 74F182
Description Look-ahead carry generator
Manufacturers Philips 
Logo Philips Logo 


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Philips Semiconductors
Look-ahead carry generator
Product specification
74F182
FEATURES
Provides carry look-ahead across a group of four ALUs
Multi-level look-ahead for high speed arithmetic operation over
long word lengths
DESCRIPTION
The 74F182 is a high speed carry look-ahead generator. It accepts
up to four pairs of active-Low Carry Propagate (P0, P1, P2, P3) and
Carry Generate (G0, G1, G2, G3) signals and an active-High Carry
input (Cn) and provides anticipated active-High carries (Cn+x, Cn+y,
Cn+z) across four groups of binary adders. The 74F182 also has
active-Low Carry Propagate (P) Carry Generate (G) outputs which
may be used for further levels of look-ahead.
The logic equations provided at the outputs are:
Cn+x = G0+P0Cn
Cn+y = G1+P1G0+P1P0Cn
Cn+z = G2+P2G1+P2P1G0+P2P1P0Cn
G = G3+P3G2+P3P2G1+P3P2P1G0
P = P3P2P1P0
The 74F182 can also be used with binary ALUs in an active-Low or
active-High input operand mode. The connections to and from the
ALU to the carry look-ahead generator are identical in both cases.
PIN CONFIGURATION
G1 1
P1 2
G0 3
P0 4
G3 5
P3 6
P7
GND 8
16 VCC
15 P2
14 G2
13 Cn
12 Cn+x
11 Cn+y
10 G
9 Cn+z
SF00725
TYPE
74F182
TYPICAL
PROPAGATION
DELAY
5.0ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
21mA
ORDERING INFORMATION
DESCRIPTION
16-pin plastic DIP
ORDER CODE
COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°C
N74F182N
16-pin plastic SO
N74F182D
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74FAST (U.L.) HIGH/LOW
Cn Carry input
2.5/2.0
G0, G2
Carry generate inputs (active-Low)
2.5/14.0
G1 Carry generate input (active-Low)
2.5/16.0
G3 Carry generate input (active-Low)
2.5/8.0
P0, P1
Carry propagate inputs (active-Low)
2.5/8.0
P2 Carry propagate input (active-Low)
2.5/6.0
P3 Carry propagate input (active-Low)
2.5/4.0
Cn+x–Cn+z
Carry outputs
50/33
G Carry generate output (active-Low)
50/33
P Carry propagate output (active-Low)
50/33
NOTE:
One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOAD VALUE HIGH/LOW
50µA/1.2mA
50µA/8.4mA
50µA/9.6mA
50µA/4.8mA
50µA/4.8mA
50µA/3.6mA
50µA/2.4mA
1.0mA/20mA
1.0mA/20mA
1.0mA/20mA
1991 Apr 15
2 853–1161 02162

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74F182 equivalent
Philips Semiconductors
Look-ahead carry generator
Product specification
74F182
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
UNIT
MIN TYP2 MAX
VOH High-level output voltage
VCC = MIN, VIL = MAX,
VIH = MIN
IOH = MAX
±10%VCC
±5%VCC
2.5
2.7
3.4
V
V
VOL Low-level output voltage
VCC = MIN, VIL = MAX,
VIH = MIN
IOL = MAX
±10%VCC
±5%VCC
0.30 0.50
0.30 0.50
V
V
VIK Input clamp voltage
VCC = MIN, II = IIK
II Input current at maximum input voltage VCC = MAX, VI = 7.0V
IIH High-level input current
VCC = MAX, VI = 2.7V
Cn
–0.73
–1.2
250
250
–1.2
V
µA
µA
mA
G0, G2
–8.4 mA
G1
IIL
Low-level input current
G3, P0, P1 VCC = MAX, VI = 0.5V
–9.6 mA
–4.8 mA
P2 –3.6 mA
P3 –2.4 mA
IOS Short-circuit output current3
VCC = MAX
–60 –150 mA
ICCH
ICC
Supply current (total)
ICCL
VCC = MAX
18 28 mA
24 36 mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH Propagation delay
tPHL Cn to Cn+x, Cn+y, Cn+z
tPLH Propagation delay
tPHL P0, P1, or P2 to Cn+x, Cn+y, Cn+z
tPLH Propagation delay
tPHL G0, G1, or G2 to Cn+x, Cn+y, Cn+z
tPLH Propagation delay
tPHL P1, P2, or P3 to G
tPLH Propagation delay
tPHL Gn to G
tPLH Propagation delay
tPHL Pn to P
TEST
CONDITION
Waveform 2
Waveform 1
Waveform 1
Waveform 2
Waveform 2
Waveform 2
LIMITS
VCC = +5.0V
Tamb = +25°C
CL = 50pF
RL = 500
MIN TYP MAX
VCC = +5.0V ± 10%
Tamb = 0°C to +70°C
CL = 50pF
RL = 500
MIN MAX
2.5 5.0 8.0
2.5 5.0 7.5
2.5
2.5
8.5
8.5
2.0 5.0 7.0
1.5 3.5 5.0
1.5
1.5
8.0
6.0
1.5 4.0 7.5
1.5 3.0 5.0
1.5
1.5
8.5
5.5
2.0 7.0 10.0
3.0 5.0 7.0
1.5
2.5
11.0
8.0
1.5 5.0 7.0
3.0 5.0 7.0
1.5
2.5
7.5
8.0
1.5 3.5 6.0
2.5 4.0 6.0
1.5
2.5
7.5
6.5
UNIT
ns
ns
ns
ns
ns
ns
1991 Apr 15
6


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