DM74S283N , 4-Bit Binary Adder with Fast CarryGeneral Description
These full adders perform the addition of two 4-bit binary
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DM74S287N ,50 ns, (256 x 4) 1024-bit TTL PROMGeneral Description
This Schottky memory is organized in the popular 256
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DM74S288AN ,256-BIT TTL PROMFeatures
This Schottky memory is organized in the popular 32 words I Advanced titanium-tungsten ..
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This Schottky memory is organized in the popular 32 words I Advanced titanium-tungsten ..
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aNational
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DS2502P-E48 ,48-Bit Node Address ChipDS2502-E4848-Bit Node Address Chip
DM74S283N
7 V, 4-bit binary adder with fast carry
National _
Semiconductor
DM54S283/DM74S283 4-Bit Binary Adders
with Fast Carry
General Description
These full adders perform the addition of two 4-bit binary
numbers. The sum (E) outputs are provided for each bit and
the resultant carry (C4) is obtained from the fourth bit
These adders feature full internal look ahead across all four
bits. This provides the system designer with partial look-
ahead performance at the economy and reduced package
count of a ripple-carry implementation.
The adder logic, including the carry, is implemented in its
true form meaning that the end-around carry can be accom-
plished without the need for logic or level inversion.
Features
I: FuiI-carry look-ahead across the four bits
" Systems achieve partial Iook-ahead performance with
the economy of ripple carry
a Typical add times
Two 8-bit words 15 ns
Two 16-bit words 30 ns
a Typical power dissipation 510 mW
Connection Diagram
DuttliUne Package
Vcc B3 A3 E3
'16 " " "
AA B4 E4 C4
" 11 " 9
l, 2 a 4
22 B2 A2 St
s 6 , 8
At B1 C0
TLfF/6484-1
Order Number DM545283J or DM745283N
See NS Package Number JIBA or N16E
Absolute Maximum Ratings (Note)
If Mllltary/Aerospace speclfled devices are required,
please contact the National Semlconductor Sales
OtfkttVDltttrlttutttrtg for avaliablllty and ttpeelmtatlons.
Supply Voltage
Input Voltage
Operating Free Air Temperature Range
Storage Temperature Range
-55''C to + 125°C
0''C to + 70'C
--65% to +150°C
Recommended Operating Conditions
Note: The "Absolute Maximum Ratings" are those values
beyond which the safety of the device cannot be guaran-
teed. The de vice should not be operated at these limits. The
parametric values defined in the ‘Electrical Characteristics"
table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table wil/ tietirta
the conditions for actual device operation.
Symbol Parameter DM54S283 DM748283 Units
Min Nom Max Min Nom Max
VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.8 0.8 V
IOH High Level Output _ _
Current (Output C4) 0.5 0.5
High Level Output _ 1 _ 1
Current (Other Outputs)
kx Low Level Output 1 0 10
Current (Output C4)
L L I O t t mA
ow eve u pu
Current (Other Outputs) 20 20
TA Free Air Operating Temperature - 55 125 0 70 =
Electrical Characteristics over recommended operating free air temperature (unless otherwise noted)
Symbol Parameter Condltlons Mln Typ Max Unlts
(Note 1)
V. InputClamp Voltage Vcc = Min, l; = -18mA -1.2 V
VOH High Level Output I/cc = Min DM54
2.5 3.4
Voltage IOH = Max V
" = Max DM74
le = Min 2.7 3.4
VOL Low Level Output Vcc = Min, loc = Max 0 5 V
Voltage Ihr, = Min, " = Max .
ll InputCurrent @ Max Vcc = Max, VI = 5.5V
Input Voltage
IIH High Level Input Current Vcc = Max, VI = 2.7V 50 uA
It. Low Level lnputCurrent Vcc == Max, VI = 0.5V -2 mA
los Short Circuit Vcc = Max C4 Output -20 -100 A
Output Current (Note 2) Other Outputs _ 40 -100
ICC1 Supply Current Vcc = Max (Note 3) 80 120 mA
Iccg Supply Current Vcc = Max (Note 4) 95 160 mA
Note P. All typicals are at Vcc --- 5V, TA = 25'C.
Not. 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Not. 3: 'CC1 is measured with all outputs open, all B inputs low and all other inputs at 4.5V.
Note 4: kxa is measured with all outputs open and all inputs at 4.5V.
Switching Characteristics at Vcc == 5V and TA = 25°C (See Section1 for Test Waveforms and Output Load)
Rt. = 2800
From (Input) = 2
Symbol Parameter To (Output) th. IS pF A. 50 pF Units
Min Max Min Max
tPLH Propagation Delay Time co to 18 20 ns
Low to High Level Output EI or 22
tPHL Propagation Delay Time co to 18 20 ns
High to Low Level Output 21 or E2
rpm Propagation Delay Time co to 18 20 ns
Low to High Level Output 23
tpHL Propagation Delay Time CO to
High to Low Level Output E3 1 8 20 ns
tpLH Propagation Delay Time co to 1 8 20 ns
Low to High Level Output Dt
tPHL Propagation Delay Time co to
High to Low Level Output 24 18 20 ns
tpLH Propagation Delay Time Ai, Bi 1 8 20 ns
Low to High Level Output to Si
tpHL Propagation Delay Time Ai, Bi 1 8 20 ns
High to Low Level Output to Si
tpLH Propagation Delay Time co to 1 1 1 5 ns
Low to High Level Output (Note I) 24
tpHL Propagation Delay Time co to 1 1 1 5 ns
High to Low Level Output (Note I) E4
tpLH Propagation Delay Time Ai, Bi 1 2 1 6 ns
Low to High Level Output (Note 1) to C4
tpHL Propagation Delay Time Ai, Bi 12 16 ns
High to Low Level Output (Note 1) to C4
Note 1: RL = 5609.
Function Table
Output
Input When co = L Whon co = H
When C2 = L When c2 = H
A1 B1 A2 B2 EI E2 C2 Et " C2
A3 B3 A4 B4 23 E4 c4 " E4 C4
L L L L L L L H L L
H L L L H L L L H L
L H L L H L L L H L
H H L L L H L H H L
L L H L L H L H H L
H L H L H H L L L H
L H H L H H L L L H
H H H L L L H H L H
L L L H L H L H H L
H L L H H H L L L H
L H L H H H L L L H
H H L H L L H H L H
L L H H L L H H L H
H L H H H L H L H H
L H H H H L H L H H
H H H H L H H H H H
TL/Fle484-3
H x High Level, L " Low Level
Note: Input conditions at At, B1, A2, B2, and co are used to determine outputs EI and " and the value of the internal carry C2. The values at CZ. A3, B3, A4, and
B4 are then used to determine outputs E3, E4, and C4.
Logic Diagram
[D-y-IIs
CCY-I-'''-'-,:,
TL/F/6484-2
This datasheet has been :
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Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
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This file is the datasheet for the following electronic components:
DM74S283N - product/dm745283n?HQS=T|-null-nulI-dscatalog-df-pf-null-wwe
DM54S283J - product/dm545283j?HQS=T|-nulI-nulI-dscatalog-df—pf—nuII-wwe
