Philips Semiconductors
Product specification
Arithmetic logic unit
74F382
FUNCTION SELECT TABLE
SELECT
S0
L
H
L
H
L
H
L
S1
L
L
H
H
L
L
H
S2
L
L
L
L
H
H
H
H
OPERATING
MODE
Clear
B minus A
A minus B
A Plus B
A
AB
Preset
B
A+B
Table 2. Two’s Complement Arithmetic
MSB
L
L
L
L
L
L
L
L
H
H
H
H
OUTPUT
Cn+4, OVR
6.5ns
6.3ns
6.3ns
–
8.0ns
27.1ns
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
LSB
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
Numerical Values
0
1
2
3
4
5
6
7
–8
–7
–6
–5
–4
–3
–2
–1
H
H
H = High voltage level
L = Low voltage level
Table 1. 16-Bit Delay Tabulation
PATH SEGMENT
Ai or Bi to Cn+4
Cn to Cn+4
Cn to Cn+4
Cn to F
Cn to Cn+4, OVR
Total Delay
TOWARD
F
6.5ns
6.3ns
6.3ns
8.1ns
–
27.2ns
H
H = High voltage level
L = Low voltage level
APPLICATION
A0–A3
B0–B3
A4–A7
B4–B7
A8–A11
B8–B11
A12–A15
B12–B15
4
A
C
IN
Cn
S
3
SELECT
3
F0–F3
B
4
A
Cn
S
3
4
B
4
A
Cn
S
3
4
B
4
A
Cn
S
3
4
B
4
Cn+4
74F382
F
Cn+4
74F382
F
Cn+4
74F382
F
Cn+4
74F382
F
OVR
C
OUT
OVERFLOW
F4–F7
F8–F11
F12–F15
SF00939
Figure 1. 16-bit Look-ahead Carry ALU Expansion
1990 Jul 12
6
PHILIPS [ NXP SEMICONDUCTORS ]
