DM74LS155N ,Dual 2-Line to 4-Line Decoders/DemultiplexersApplications:
ers with individual strobes and common binary-address in- Dual 2-to-4-Iine decoder ..
DM74LS156M ,Dual 2-Line to 4-Line Decoders/DemultiplexersFeaturesThese TTL circuits feature dual 1-line-to-4-line demultiplex-
DM74LS156MX , Dual 2-Line to 4-Line Decoder/1-to-4 Line Demultiplexer with Open-Collector OutputsApplications:ers with individual strobes and common binary-addressDual 2-to-4-line decoderinputs in ..
DM74LS156MX , Dual 2-Line to 4-Line Decoder/1-to-4 Line Demultiplexer with Open-Collector OutputsDM74LS155 • DM74LS156 Dual 2-Line to 4-Line Decoders/DemultiplexersAugust 1986Revised April 2000DM7 ..
DM74LS156N ,Dual 2-Line to 4-Line Decoders/DemultiplexersApplications:ers with individual strobes and common binary-addressDual 2-to-4-line decoderinputs in ..
DM74LS157 ,Quad 2-Line to 1-Line Data Selectors/MultiplexersFeaturesYBuffered inputs and outputsThese data selectors/multiplexers contain inverters andYdrivers ..
DS21554LN ,3.3V/5V E1 Single-Chip TransceiversBLOCK DIAGRAM .. 9 3.
DS21554LN+ ,3.3V/5V E1 Single Chip Transceivers (SCT)FUNCTIONAL DESCRIPTION7 1.2. DOCUMENT REVISION HISTORY .8 2.
DS2155GNB+ ,T1/E1/J1 Single-Chip TransceiverFEATURES The DS2155 is a software-selectable T1, E1, or J1 Complete T1/DS1/ISDN-PRI/J1 Transceiver ..
DS2155GNC2 ,T1/E1/J1 Single-Chip TransceiverTABLE OF CONTENTS .......2 1.1 TABLE OF FIGURES .6 1.2 TABLE OF TABLES...7 2. DATA SHEET REVISION H ..
DS2155GNC2+ ,T1/E1/J1 Single-Chip TransceiverFeatures continued in Section 3.
DS2155L ,T1/E1/J1 single-chip transceiverFEATURES The DS2155 is a software-selectable T1, E1, or J1 Complete T1/DS1/ISDN-PRI/J1 Transceiver ..
DM74LS155N
7 V, dual 2-line to 4-line decoder/demultiplexer
gif Natiqnal
[ Semiconductor
54LS155/DM54LS155/DM74LS155,
54LS156/DM54LS156/DM74LS156
Dual 2-Line to 4-Line Decoders/Demultiplexers
General Description
These TTL circuits feature dual 1-Iine-to-4-line demultiplex-
ers with individual Strobes and common binary-address in-
puts in a single 16-pin package. When both sections are
enabled by the strobes, the common address inputs se-
quentially select and route associated input data to the ap-
propriate output of each section. The individual Strobes per-
mit activating or inhibiting each of the 4-bit sections as de-
sired. Data applied to input CI is inverted at its outputs and
data applied at C2 is true through its outputs. The inverter
following the CI data input permits use as a 3-to-8-Iine de-
coder, or 1-to-8-line demultiplexer. without external gating.
Input clamping diodes are provided on these circuits to mini-
mize transmission-Iine effects and simplify system design.
Features
I: Applications:
Dual 2-to-4wline decoder
Dual 1-to-4-Iine demultiplexer
3-to-8-line decoder
1-to-8-line demultiplexer
I: Individual strobes simplify cascading for decoding or
demultiplexing larger words
I: Input clamping diodes simplify system design
a Choice of outputs:
Totem-pole (LS155)
Open-collector (LS156)
n Alternate Military/Aerospace device (54L8155/156) is
available. Contact a National Semiconductor Sales Of-
fice/Distributor for specifications.
Connection Diagram and Function Tables
DuaI-In-Llne Package
SELECT OUTPUTS
DATA STRDBE INPUT r-------"----
VCC C2 G2 A 2Y3 2Y2 2Y1 2Y0
16 15 " " " " 10 9
1 2 3 4 5 6 , 8
DATA STROBE SELECT "3 "2 W! 1Y0 GND
C1 G1 INPUT _-----------"
a OUTPUTS
TLfF/6395-1
3A.mettr-b.t.lrttt Decoder or
1-Llna-to-8-Llne Demultlplexor
Inputs Outputs
Strobe
Select OrData (0) (1) (2) (3) (4) (5) (6) m
Ct B A Gt 2Y0 2Y1 2Y2 2Y3 1Y0 1Y1 1Y2 1Y3
X X X H H H H H H H H H
L L L L L H H H H H H H
L L H L H L H H H H H H
L H L L H H L H H H H H
L H H L H H H L H H H H
H L L L H H H H L H H H
H L H L H H H H H L H H
H H L L H H H H H H L H
H H H L H H H H H H H L
Order Number ti4LSttitiDMt2B, 54LSNUiFMQB,
54LS155LMQB, DM54LS155J, DM54L8155w,
DM74L8155M, DM74LS155N. 54LS1 56DMQB,
54LS156FMQB, DM54L3156J, DM54LS158W.
DM74LS156M or DM74L5156N
See NS Package Number E20A, J16A,
M16A, N1BE or W16A
2-Llne-to-4-Llne Decoder or
r.Llrte-to4Llrte Demultlplexer
Inputs Outputs
Select Strobe Data
B A G1 C1 1Y0 1Y1 1Y2 1Y3
X X H X H H H H
L L L H L H H H
L H L H H L H H
H L L H H H L H
H H L H H H H L
X X X L H H H H
Inputs Outputs
Select Strobe Data
B A 62 C2 2Y0 2Y1 2Y2 2Y3
X X H X H H H H
L L L L L H H H
L H L L H L H H
H L L L H H L H
H H L L H H H L
X X X H H H H H
tC = inputs C1 and C2 connected together
" -- inputs G1 and 62 connected together
H w-. high level, L = low level, X = don't care
SSI-S'IOSSIS'I
LS155°LS156
Absolute Maximum Ratings (Note)
If Mllltary/Aerospace speelfled devlces are required,
please contact the National Semiconductor Sales
OfflttttfDltttrlttutttetg for availability and trptsttlfltratlona.
Note: The "Absolute Maximum Ratings" are those values
beyond which the safety of the device cannot be guaran-
teed. The device should not be operated at these limits. The
parametric values defined in the "Electrical Characten'stics"
table are not guaranteed at the absolute maximum ratings.
The "RBtxgrrtmertdBd Operating Conditions" table will define
the conditions for actual device operation.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range
DM54LS and 54LS -55T to + 125°C
DM74LS ty'C to + 7tPC
Storage Temperature Range
--65''C to + 150'C
Recommended Operating Conditions
Symbol Parameter DM54LS155 DM74L8155 Units
Mln Nom Max Mln 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 0.7 0.8 V
VOH High Level Output Current -0.4 -0.4 mA
IOL Low Level Output Current 4 8 mA
TA Free Air Operating Temperature -65 125 0 70 "C
'LS155 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Condltlons Mln Typ Max Units
(Note 1)
VI InputClamp Voltage Vcc = Min, I. = -18 mA -1.5 v
VoH High Level Output Vcc = Min, IOH = Max DM54 2.5 3.4
Volta e V = Max V = Min V
g IL , IH DM74 2.7 3.4
VOL Low Level Output Vcc = Min, IOL = Max DM54 0.25 0.4
Voltage Vit. LT,.-. Max, VIH = Min DM74 0.35 0.5 V
IOL = 4 mA, Vcc = Min DM74 0.25 0.4
I. lnputCurrent tt Max Vcc = Max, V. = 7V 0.1 m A
Input Voltage
I.“ High Level InputCurrertt Vcc = Max, VI = 2.7V 20 pA
In. Low Level Input Current Vcc = Max, VI = 0.4V -0.36 mA
Ios Short Circuit Vcc = Max DM54 -20 - 100
Out ut Current (Note 2) mA
9 DM74 -20 -100
Ice Supply Current Vcc = Max (Note 3) 6.1 10 mA
Note 1: All Yyplcals 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.
Note 3: Ice Is measured with all outputs open, A,B, and tM inputs at 4.5V. and C2, GI, and 62 inputs grounded.
'LS155 Switching Characteristics
at Vcc = 5V and TA = 25°C (See Section 1 for Test Waveforms and Output Load)
RL = 2 kft
From (Input)
Symbol Parameter To (Output) CL = " pF th. == 50 pF Unlts
Min Max Min Max
tpLH Propagation Delay Time A, B, C2, G1 18 22 ns
Low to High Level Output or G2 to Y
tpHL Propagation Delay Time A, B, C2, G1 27 3 5 ns
High to Low Level Output or G2 to Y
tpLH Propagation Delay Time A or B 18 24 ns
Low to High Level Output to Y
tPHL Propagation Delay Time A or B
High to Low Level Output to Y 27 35 ns
tpLH Propagation Delay Time C1
Low to High Level Output to Y 20 24 ns
tpHL Propagation Delay Time C1
High to Low Level Output to Y 27 35 ns
Recommended Operating Conditions
Symbol Parameter DMS4LS156 DM74LS156 Unlts
Mln 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
" Low Level Input Voltage 0.7 0.8 V
Vors High Level Output Voltage 5.5 5.5 V
lot. Low Level Output Current 4 8 mA
TA Free Air Operating Temperature - 55 125 0 70 "C
’LS156 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Condltlons Min Typ Max Unlts
(Note 1)
VI lnputCIamp Voitage V00 = Min, II = --18 mA -1.5 V
'CEX High Level Output Vcc = Min, Vo = 5.5V 100 A
Current " = Max, VIH = Min p.
VOL Low Level Output Voc = Min, IOL = Max DM54 0.25 0.4
Voltage " = Max, VIH = Min DM74 0.35 0.5 V
IOL = 4 mA, Vcc ---. Min DM74 0.25 0.4
II Input Current © Max Vcc = Max, V. = 7V 0.1 m A
Input Voltage
'lH High Level InputCurrent Vcc = Max, VI == 2.7V 20 “A
ll. Low Level InputCurrent Vcc = Max, VI = 0.4V -0.36 mA
ICC Supply Current Vcc = Max (Note 2) 6.1 10 mA
Note tr All typicals are at Vcc --- 5v, TA = 25° C.
Note 2: icc is measured with all outputs open, A, B, and C1 inpu‘s at 4.5V, and ca GI, and G2 grounded.
SSLS'IOSSI-S'l
LS155°LS156
'LS156 Switching Characteristics
at Voc = 5V and TA = 25°C (See Section 1 for Test Waveforms and Output Load)
RL = 2 kn
From (Input)
Symbol Parameter To (Output) A. = 15 pF CL = SOpF Unlts
Mln Max Mln Max
tpLH Propagation Delay Time A, B, ca G1 28 53 ns
Low to High Level Output or G2 to Y
tpHL Propagation Delay Time A, B, C2, G1 33 43 ns
High to Low Level Output or G2 to Y
1pm .Propy.a.t.k'.n Delay Time A or B 28 53 ns
Low to High Level Output to Y
tpHL Propagation Delay Tune A or B 33 43 ns
High to Low Level Output to Y
tpLH Propagation Delay Time C1
Low to High Level Output to Y 28 53 ns
tPHL Propagation Delay Time CI
High to Low Level Output to Y 34 43 ns
Logic Diagram
STRDBE (2) m OUTPUT
GI “'0
DATA ill Itil OUTPUT
CI tYI
fs) OUTPUT
SELECT t3) w:
a W OUTPUT
(9) OUTPUT
SELECT (t 2”
A (10) OUTPUT
DATA ttsl " tlourpuT
C2 2Y2
STROBE “4) (12) OUTPUT
G2 2Y3
TL/F/6395-2
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:
54LS156LMQB - product/54Is156|mqb?HQS=TI-nu|I-nu||-dscatalog-df-pf-null-wwe
DM74LS155N - product/dm74ls155n?HQS=T|-nu|I-nu|I-dscataIog-df-pf-null-wwe
