54LS377DMQB ,7 V, octal D flip-flop with common enable and clockFeatures
The 'LS377 is an B-bit register built using advanced low I 8-bit high speed parallel re ..
54LS379 ,Quad Parallel Register with Enablefeaturesthecommon Buffered positive edge-triggered clockEnable rather than common Master Reset. YBu ..
54LS37DMQB , QUAD 2-INPUT NAND BUFFERS
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54LS42 ,BCD to Decimal Decoderapplications as 4-line-to-16-line decoders; 3-ed in pairs to make BCD input data available for deco ..
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 ..
70CRU04 ,400V 70A Ultra-Fast Doubler Diode in a TO-218 packageapplications in which the switching energy is designed not to bepredominant portion of the total en ..
70G-IDC5S , Contact Closure DC Input Modules
54LS377DMQB
7 V, octal D flip-flop with common enable and clock
gif Natiqnal
Semiconductor
54LS377/DM74LS377
Octal D Flip-Flop with
General Description
Common Enable and Clock
Featu res
The 'LS377 is an B-bit register built using advanced low a 8-bit high speed parallel registers
power Schottky technology. This register consists of eight a Positive edge-triggered D-type flip-flops
D-type flip-flops with tl buffered common clock and a buff- " Fully buffered common clock and enable inputs
ered common input enable. The device is packaged in the
space-saving (0.3 inch row spacing) 20-pin package.
Connection Diagram
Dual-In-Line Package
[-1 20 -r'cc
oo- 2 19 --07
Do- 3 18 -07
Bl-. 4 17 ~05
QI- 5 16 -06
02-- s 15 -os
D2e 7 14 -05
03- 8 13 --04
03- ' 12 .-tu
GND-10 11 -CP
TLlF/9831 -1
Order Number 54LS37TDMQB, 54LS377FMt2B,
54LS377LMQB, DM74LS377WM or DM74LSS77N
See NS Package Number
E20A, J20A, M203, N20A or W20A
Pin Names Description
E Enable Input (Active LOW)
Do-D7 Data Inputs
CP Clock Pulse Input (Active Rising Edge)
00-07 Flip-Flop Outputs
Absolute Maximum Ratings (Note)
If MilltaryfAerosptttts specified devlces are required,
please contact the National Semiconductor Sales
ttttlee/Distributors for availability and apttelfleatlorts.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range
54LS -55°C to + 125°C
DM74LS 0°C to + 7tr'C
Storage Temperature Range -65'C 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 device should not be opera ted at these limits. The
parametric values dtttined in the "Electrical Characteristics "
table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table " ttMina
the conditions for actual device operation.
Symbol Parameter 54L3377 DM74L5377 Units
Mln Nom Max Mn Nom Max
Vcc Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
ViH High Level Input Voltage 2 2 V
" Low Level Input Voltage 0.7 0.8 V
IOH High Level Output Current - 0.4 - 0.4 mA
IOL Low Level Output Current 4 8 mA
TA Free Air Operating Temperature - 55 125 O 70 "C
ts (H) Setup Time HIGH or LOW 20 10 ns
ts (L) on to CP 20 10
th (H) Hold Time HIGH or LOW 5.0 5.0 ns
th (L) th, to GP 5.0 5.0
ts (H) Setup Time HIGH or LOW 10 10 ns
ts (L) E to CP 20 20
th (H) Hold Time HIGH or LOW 5.0 5.0 ns
th (L) E to CP 5.0 5.0
tw (H) CP Pulse Width HIGH or LOW 20 20 ns
tw (L) 20 20
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Mln (Note 1) Max Unlts
V. Input Clamp Voltage Vcc = Min, l. = --18 mA -1.5 V
VoH High Level Output Vcc = Min, IOH = Max 54LS 2.5
Volta V = Max V
iN IL DM74 2.7 3.4
VOL Low Level Output Voc = Min, lot. = Max 54LS 0.4
Voltage VIH = Min mm 0.35 0.5 v
IOL = 4 mA, Vcc = Min DM74 0.25 0.4
ll Input Current tit Max Vcc = Max, VI = 10V 0.1 mA
lnputVoltage
IIH High Level Input Current Voc = Max, V. == 2.7V 20.0 pA
In, Low Level Input Current Voc = Max, VI = 0.4V -0.4 mA
Ios Short Circuit Voc = Max 54LS -20 - 100
O t utCurrent (Note 2) mA
u p DM74 -20 -100
ICC Supply Current V00 = Max 28 mA
Nola It All typicals are at Vac = 5V. TA " 25'C.
Note 2: Not more than one output should be shorted at a time. and the duration should not exceed one second.
Switching Characteristics
VCC = + 5.OV, TA = +25'C (See Section 1 for waveforms and load configurations)
Symbol Parameter RL = 2 kn’cL = 15 pF Units
Min Max
fmax Maximum Clock Frequency 30 MHz
tPLH Propagation Delay 25 ns
tPHL CP to On 25
Functional Description Truth Table
The 'LS377 consists of eight edge-triggared D flip-flops with
individual D Linputs and Q outputs. The Clock (CP) and En- Inputs Output
able input (E) are common to all flip-flops. ' CP th, th,
When E is LOW, new data is entered into the register on the H X X N Ch
next LOW-to-HIGH transition of CP. When E is HIGH, the o ange
register will retain the present data independent of the CP. L f H H
L f L L
H = HIGH Voltage LevaI
L = LOW Voltage Level
x = Immaterial
Logic Symbol
I 3 4 7 8 IS " 17 "
l II II II II
E t)0t)t0203tu03t)6tr7
It- tT
00tt10203060s0607
II I I II I
2 ' s suntan
TL/F/9831-2
Voc = Pin 20
GND = Pin10
Logic Diagram
00 DI " D3 " DS N D7
t 4) I I I I I I I I
C8 H ye
l l l l l g l F l l
CP D D CP t) tP o " 0 CF D CP i) C? o
0 0 0 0 O Q Q O
I l-- l--
co ttt 02 03 04 05 06 07
TL/F/9831-3
This datasheet has been :
www.ic-phoenix.com
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:
54LS377DMQB - product/54Is377dmqb?HQS=T|-nu|I-nulI-dscatalog-df—pf—nuII-wwe
54LS377LMQB - product/54|s377|mqb?HQS=T|-nu|I-nulI-dscatalog-df-pf—null-wwe
54LS377FMQB - product/54Is377fmqb?HQS=T|-null-null-dscatalog-df—pf—nuII-wwe
