54LS273 ,8-BIT REGISTER WITH CLEARElectrical Characteristics
Over recommended operating free air temperature range (unless otherwise ..
54LS273 ,8-BIT REGISTER WITH CLEARFeatures
The 'LS273 is a high speed 8-bit register, consisting of eight I Edge-triggered
D-type ..
54LS279DMQB ,Quad S-R Latches54LS279/DM54LS279/DM74LS279QuadS-RLatchesMay198954LS279/DM54LS279/DM74LS279QuadS-RLatchesGeneralDes ..
54LS279DMQB ,Quad S-R LatchesFeaturesstored in the latch and appear on the corresponding Q out-YAlternate military/aerospace dev ..
54LS27DM , TRIPLE 3-INPUT NOR GATE
54LS283 ,4-Bit Binary Adder with Fast CarryFeaturesYFull-carry look-ahead across the four bitsThese full adders perform the addition of two 4- ..
7001 ,900 MHz THREE GAIN LEVEL LNAapplications. STB7001 is housed in asmall industry-standard MSOP8 surface mountpackage, requiring v ..
7002 ,1.8GHz THREE GAIN LEVEL LNASTB70021.8GHz THREE GAIN LEVEL LNA• FULLY INTEGRATED 1.8GHz LNA• THREE GAIN LEVELS (0dB, 18dB, 26dB ..
7016X5 , SMT LEDs 1208 Package Size
70543-0001 , 2.54mm (.100") Pitch SL™ Header, Single Row, Vertical, .120" Pocket, Shrouded, 2Circuits, 0.38μm (15μ") Gold (Au) Selective Plating, Tin (Sn) PC Tail Plating
70553-0106 , 2.54mm (.100") Pitch SL™ Header, Low Profile, Single Row, Right Angle, .120" PocketShrouded, 2 Circuits, 0.76μm (30μ") Gold (Au) Selective Plating, Tin (Sn) PC Tail
70CRU02 ,200V 35A Ultra-Fast Doubler Diode in a TO-218 packageapplications in which the switching energy is designed not to bepredominant portion of the total en ..
54LS273
8-BIT REGISTER WITH CLEAR
54LS273/DM74LS273
gif Natiqnal
1 Semiconductor
8-Bit Register with Clear
General Description
Features
The 'LS273 is a high speed e-bit register, consisting of eight ll Edge-triggered
D-type tlip-flops with a common Clock and an asynchronous n B-bit high speed register
active LOW Master Reset. This device is supplied in a 20- a Parallel in and out
pin package featuring 0.3 inch row spacing.
II Common clock and master reset
Connection Diagram
DuaI-In-Llne Package
t7rt-. 1 V 20 "e
Qtr- 2 19 -07
M- 3 18 --07
01- 4 17 -06
Qt- 5 16 -os
Q2- s 15 -05
02- 7 14 -05
B3-- a 13 .-tu
03- 9 12 ~01
tmo-- 10 11 -ct'
TL/F/9825-t
Order Number 54LS273DMOB, 54LS2T3FMt2B,
54LS273LMt2B, DM74LS273M or DM74LS273N
500 NS Package Number E20A, J20A, M203,
N20A or W20A
Pln Names Description
CP Clock Pulse Input (Active Rising Edge)
DO-D7 Data Inputs
MA Asynchronous Master Reset Input
(Active LOW)
00-07 Flip-Flop Outputs
Absolute Maximum Ratings (Note)
If Mllltary/Aerospace trpttelfttsd devices are required,
please canted the National Semiconductor Sales
t9tflee/Dlatrlttutttra for avaliablllty and specifications.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range
54LS - 55'C to +125''C
Note: The "Absolutty 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 ''Wapmmendad Operating Conditions " table will define
the conditions for actual device operation,
DM74LS
tPC to + 70'C
Storage Temperature Range - 65°C to + 150'C
Recommended Operating Conditions
Symbol Parameter 54LS273 DM74L5273 Unlls
Mln Nom Max Min Nom Max
Voc Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
" High Level Input Voltage 2 2 V
" Low Level Input Voltage 0.7 0.8 V
lor, High Level Output Current - 0.4 -0.4 rnA
IOL Low Level Output Current 4 8 mA
TA Free Air Operating Temperature - 55 125 0 70 "C
ts(H) Setup Time HIGH or LOW 15 15 ns
ts(L) Dn to CP 15 15
th(H) Hold Time HIGH or LOW 5 5 ns
th(L) Dn to CP 5 5
tw(H) CP Pulse Width HIGH or LOW 20 20 ns
tth) 20 20
ML) W Pulse Width LOW 20 20 ns
tree Recovery Time
WA to CP 15 15 ns
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Condltlons Min Typ Max Units
(Note 1)
lh InputCIamp Voltage Vcc = Min, I. = -18 mA - 1.5 V
VOH High Level Output Vcc = Min, IOH = Max, 54LS 2.5 V
Voltage W = Max DM74 2.7 3.4
VOL Low Level Output VCC = Min, loc == Max, 54LS 0.4
Voltage " = Min DM74 0.35 0.5 v
kx = 4 mA, Voc = Min DM74 0.25 0.4
ll InputCurrent tt Max Vcc = Max, V. = 10V 0.1 mA
Input Voltage
IIH High Level InputCurrent Vcc = Max, V. == 2.7V 20 FA
IIL Low Level lnputCurrent Vcc = Max, V. = 0.4V -0.4 mA
log Short Circuit Vcc = Max 54LS -20 - 100
Output Current (Note 2) DM74 - 20 -100
ICC Supply Current Vcc = Max 27 mA
Note 1: All typical: are at Vcc = W, TA - 25'c.
Note 2 Not more then one output should be shorted at a time. and the duration should not exceed one second.
SLZS'I
Switching Characteristics
Vcc = +5.ov, TA --- +25% (See Section 1 for waveforms and load configurations)
A. = " pF
Symbol Parameter tMLS DMMLS Unlta
RL "--. 2 kn
Mln Max Min Max
tmax Maximum Clock Frequency 30 30 MHz
tpLH Propagation Delay 32 24 ns
tPHL CP to On 32 24
tpLH Propagation Delay
MA to th, 32 27 ns
Functional Description Truth Table
The 'LS273 is an 8-bit parallel register with a common Clock
and common Master Reset. When the MA input is LOW, the Inputs Ouguu
Q outputs are LOW, independent of the other inputs. Infor- MR CP Dn n
mation meeting the setup and hold time requirements of the L x x L
D inputs is transferred to the Q outputs on the LOW-to- H / H H
HIGH transition of the clock input. H / L L
H - HIGH VoItage Level
L '= LOW Vottage Level
X = Immaterial
Logic Symbol
3 4 , 313M171!
I I l I J I I I
00 th D: N " N Dc I)?
"-- 01’
um 0102030‘050607
Y I I I I I I I I
It 5 6 912151619
TL/Fl9825-2
Voc -* Pin 20
GND == Pin10
Logic Diagram
DO 01 D2 05 N be no U1
l l I I I I I l
O D C? D a D C, O CP D tr tt a II a tt
ctr CD K11 a: co co 00
o f t n n
TU FIDBZS-a
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
corp/docs/irwestor_relations/Pr_09_23_201 1_national_semiconductor.html
This file is the datasheet for the following electronic components:
54LS273FMQB - product/54IsZ73fmqb?HQS=T|-null-null-dscatalog-df-pf-null-wwe
DM74LS273N - product/dm74|3273n?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
DM74LS273M - product/dm74lsZ73m?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
54LS273LMQB - product/54IsZ73Imqb?HQS=TI—nu|I—nu||-dscatalog-df—pf—null-wwe
54LS273LMQB - product/54IsZ73Imqb?HQS=TI-nu|I-nu||-dscatalog-df-pf-null-wwe
54LS273DMQB - product/54|5273qub?HQS=T|-nu|I-nulI-dscatalog-df-pf-nulI-wwe
54LS273 - product/54IsZ73?HQS=TI-nu|I-nu|I-dscataIog-df-pf-null-wwe
54LS273 - product/54IsZ73?HQS=T|—nul|—nu|I-dscataIog-df-pf-null-wwe
54LS273FMQB - product/54IsZ73fmqb?HQS=T|-null-null-dscatalog-df-pf-null-wwe
DM74LS273M - product/dm74lsZ73m?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
DM74LS273N - product/dm74lsZ73n?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
54LS273DMQB - product/54I3273dmqb?HQS=T|-nu|I-nulI-dscatalog-df-pf-nuII—wwe
DM74LS273N - product/dm74lsZ73n?HQS=T|-nu|I-nu|l-dscataIog-df-pf-null-wwe
DM74LS273M - product/dm74lsZ73m?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
