The UT54ACS283 and the UT54ACTS283 are 4-bit binary
adders. The adders perform addition of two 4-bit binary words.
The sum ( ) outputs are provided for each bit and the resultant
carry (C4) is obtained as the fifth bit. The adders feature full
internal look-ahead across all four bits for fast carry generation.
The devices are characterized over full military temperature
range of -55 C to +125 C.
LOGIC SYMBOL
(5)
(3)
(14)
(12)
(6)
(2)
(15)
(11)
(7)
3
C1
C0
3
0
Q
3
PINOUTS
16-Pin DIP
Top View
2
B2
A2
1
A1
B1
C0
V
SS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
B3
A3
3
A4
B4
4
C4
16-Lead Flatpack
Top View
2
B2
A2
1
A1
B1
C0
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
B3
A3
3
A4
B4
4
C4
A1
A2
A3
A4
B1
B2
B3
B4
C0
0
P
0
(4)
(1)
(13)
(10)
(9)
C4
1
2
3
4
V
SS
Note:
1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
205
RadHard MSI Logic
UT54ACS283/UT54ACTS283
FUNCTION TABLE
INPUT
When C0 = L
A1
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
A3
B1
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
B3
A2
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
A4
B2
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
B4
1
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
3
2
L
L
L
H
H
H
H
L
H
H
H
L
L
L
L
H
OUTPUT
When C2 = L
4
C2
L
L
L
L
L
L
L
H
L
L
L
H
H
H
H
H
C4
When C0 = H
1
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
3
2
L
H
H
H
H
L
L
L
H
L
L
L
L
H
H
H
When C2 = H
4
C2
L
L
L
L
L
H
H
H
L
H
H
H
H
H
H
H
C4
H = high level, L = low level
Note:
Input conditions at A1, A2, B1, B2, and C0 are used to determine outputs 1 and 2 and the value of the internal carry C2. The values at C2, A3, B3, A4, and
B4 are then used to determine outputs 3, 4, and C4.
RadHard MSI Logic
206
UT54ACS283/UT54ACTS283
LOGIC DIAGRAM
(9)
C4
B4
(11)
A4
(12)
(10)
B3
(15)
(13)
A3
(14)
B2
(2)
(1)
A2
B1
(3)
(6)
A1
C0
(5)
(7)
(4)
207
RadHard MSI Logic
UT54ACS283/UT54ACTS283
RADIATION HARDNESS SPECIFICATIONS
1
PARAMETER
Total Dose
SEU Threshold
2
SEL Threshold
Neutron Fluence
LIMIT
1.0E6
80
120
1.0E14
UNITS
rads(Si)
MeV-cm
2
/mg
MeV-cm
2
/mg
n/cm
2
Notes:
1. Logic will not latchup during radiation exposure within the limits defined in the table.
2. Device storage elements are immune to SEU affects.
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
DD
V
I/O
T
STG
T
J
T
LS
JC
PARAMETER
Supply voltage
Voltage any pin
Storage Temperature range
Maximum junction temperature
Lead temperature (soldering 5 seconds)
Thermal resistance junction to case
DC input current
Maximum power dissipation
LIMIT
-0.3 to 7.0
-.3 to V
DD
+.3
-65 to +150
+175
+300
20
10
1
UNITS
V
V
C
C
C
C/W
mA
W
I
I
P
D
Note:
1. Stresses outside the listed absolute maximum ratings may cause permanent damage to the device. This is a stress rating only, functional operation of the device
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