it)
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Logic Diagram
==
STAoa...
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Q ...
....
it)
....
U) ..J c(
~ it)
:::E
Q
DATA INPUTS
DATA SELECT (BINARY)
E 7
o
4I 3
2 2
3 I
4 15
514
6 13
7 '2
11
1
i
1 i>--L
B
1 a
c
I
c'\
J
~
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J
~
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-~
~ ~
~
i f
OUTPUT Y
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J L
-TL/F/6203-2
2·82
~ Semiconductor
NatiOnalCorporation
DM54ALS153/DM74ALS153 Dual 1 of 4 Line Data Selector/Multiplexer
General Description
This Data Selector/Multiplexer contains full on-chip decod-ing to select one-of-four data sources as a result of a unique two-bit binary code at the Select inputs. Each of the two Data Selector/Multiplexer circuits have their own separate Data and Strobe inputs and a non-inverting output buffer.
The Select inputs A and B are common to both sections.
The Strobe inputs, when at the high level, disable their as-sociated data inputs and force the corresponding output to the low state. The Select input buffers incorporate internal overlap features to ensure that select input changes do not cause invalid output transients.
Connection Diagram
Dual-In-Llne Package
mOBE 61-,,+1 -·4:>>1)0., ~VCC
SElECT • ...,2
-o-tf+--,
,....o.A<,..,.1---+1:.:.5 STROBE 62" ICl..1I---r- ... \... 14 SElECT A
~
DATA I.PUlI
ICZ....!I-- r- ... ~t!!..2Cl
8~~~-+-~B
ICO..!---il----4~-+--I1 A,~---+-"""-IA
i t - -.... - - l i
OUT:UTTI 7
...
....T
1--.!.L2C2
TL/F/6204-1
Order Number DM54ALS153J, DM74ALS153M or DM74ALS153N
See NS Package Number J16A, M16A or N16A
Features
• Advanced oxide-isolated, ion-implanted Schottky TTL process
• Switching performance is guaranteed over full tempera-ture and Vee supply range
• Pin and functional compatible with LS family counter-part
• Improved output transient handling capability
Function Table
Select
Data Inputs Strobe Output Inputs
B A CO C1 C2 C3 G V
X X X X X X H L
L L L X X X L L
L L H X X X L H
L H X L X X L L
L H X H X X L H
H L X X L X L L
H L X X H X L H
H H X X X L L L
H H X X X H L H
Select inputs A and B are common to both sections.
H = High Level, L = Low Level, X = Don't Care
2-83
PI
Absolute Maximum Ratings
If Military/Aerospace specified devices are required, Note: The "Absolute Maximum Ratings" are those values contact the National Semiconductor Sales Office/ beyond which the safety of the device cannot be guaran-Distributors for availability and specifications. teed The device should not be operated at these limits. The Supply Voltage 7V parametric values defined in the "Electrical Characteristics"
Input Voltage 7V table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table will define Operating Free Air Temperature Range the conditions for actual device operation.
DM54ALS - 55·C to + 125·C
DM74ALS O·C to +70·C
Storage Temperature Range - 65·C to + 150·C
Recommended Operating Conditions
Symbol Parameter DM54ALS153 DM74ALS153
Units
Min Nom Max Min Nom Max
Vee Supply Voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.7 0.8 V
10H High Level Output Current -1 -2.6 mA
10L Low Level Output Current 12 24 mA
TA Free Air Operating Temperature -55 125 0 70
·c
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at Vee
=
5V, T A=
25·C.Symbol Parameter Conditions Min Typ Max Units
VIK Input Clamp Voltage Vee
=
4.5V,IIN=
-18 mA -1.5 VVOH High Level Output Vee
=
4.5V, 10H = Max 2.4 3.2 VVoltage
10H
=
-400 /-LA, Vee=
4.5V to 5.5V Vee - 2 VVOL Low Level Output Vee
=
4.5V 54174ALS 0.25 0.4 VVoltage 10L
=
12 mA74ALS
0.35 0.5 V 10L
=
24mAII Input Current at Vee
=
5.5V, VIN=
7V 0.1 mAMax Input Voltage
IIH High Level Input Current Vee
=
5.5V, VIN=
2.7V 20 /-LAIlL Low Level Input Current Vee
=
5.5V, VIN=
0.4V -0.1 mA10 Output Drive Current Vee
=
5.5V, VOUT=
2.25V -30 -112 mAlee Supply Current Vee
=
5.5V7.5 14 mA
All Inputs
=
4.5VSwitching Characteristics
over recommended operating free air temperature range (Note 1).
Symbol Parameter Conditions From To DM54ALS153 DM74ALS153
Units
Min Max Min Max
tpLH Propagation Delay Time Vee = 4.5V to 5.5V
Select Y 5 29 5 21 ns
Low to High Level Output CL = 50 pF tpHL Propagation Delay Time RL = 500n
27 5 21 ns
Select y 5
High to Low Level Output tpLH Propagation Delay Time
Data Y 3 15 3 10 ns
Low to High Level Output tpHL Propagation Delay Time
Data Y 2 18 4 15 ns
High to Low Level Output tpLH Propagation Delay Time
Strobe y 5 27 5 18 ns
Low to High Level Output tpHL Propagation Delay Time
Strobe Y 3 22 5 18 ns
High to Low Level Output Note 1: See Section 1 for test waveforms and output load.
Logic Diagram
STROBEGI ~
riCO 6 r--
r---t }
-5 I
ICI ~
7 OUTPUT
DATA I -< -'- "T YI
IC2 4 ~~
i
IC3 3
,f> Ln 1
ISllItT { :
-"rt> D r
r2CO 10
}
-2CI II
DATA 2 ..a.
9 OUTPUT Y2
2C2 12 '--t:::::::-:f
--2C3 13
"-STROBE G2 15
TLlF/6204-2
co
r---~~ Semiconductor
NatiOnalCorporation
DM54ALS/DM74ALS157,158 Quad 1 of 2 Line Data Selectors/Multiplexers
PRELIMINARY
General Description
These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four out-put gates. A separate strobe inout-put is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The ALS157 presents true data whereas the ALS158 presents inverted data to minimize propagation de-lay time.
• Advanced oxide-isolated, ion-implanted Schottky TTL process
Features
• Functionally and pin for pin compatible with Schottky and low power Schottky TTL counterpart
• Improved AC performance over Schottky and low pow-er Schottky countpow-erparts
• Expand any data input point
• Multiplex dual data buses
• General four functions of two variables (one variable is common)
• Switching specifications at 50 pF
• Switching specifications guaranteed over full tempera-ture and Vee range
Connection Diagram
Function Table
Dual·ln·Llne Package
INPUTS OUTPUT INPUTS OUTPUT
---
-INPUTS OUTPUT INPUTS OUTPUT Order Number DM54ALS157J, DM54ALS158J,
DM74ALS157M, N, or DM74ALS158M, N See NS Package Number J16A, M16A or N16A
Inputs Output Y
This document contains information on a product under development. NSC reserves the right to change or discontinue this product without notice.
2-86
Absolute Maximum Ratings
If Mllitaryl Aerospace specified devices are required, Note: The "Absolute Maximum Ratings" are those values contact the National Semiconductor Sales Offlcel beyond which the safety of the device cannot be guaran-Distributors for availability and specifications. teed The device should not be operated at these limits. The Supply Voltage 7V parametric values defined in the "Electrical Characteristics"
Input Voltage 7V table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table will define Operating Free Air Temperature Range the conditions for actual device operation.
DM54ALS - 55·C to + 125·C
DM74ALS O·Ctc +70·C
Storage Temperature Range - 65·C to + 150·C
Recommended Operating Conditions
Symbol Parameter DM54ALS 157,158 DM74ALS157,158
Units
Min Nom Max Min Nom Max
Vee Supply Voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.7 0.8 V
10H High Level Output Current -0.4 -0.4 mA
10L Low Level Output Current 4 8 mA
TA Free Air Operating Temperature -55 125 0 70 ·C
Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at Vee
=
5V, T A=
25·C.Symbol Parameter Conditions Min Typ Max Units
VIK Input Clamp Voltage Vee
=
4.5V,11=
-18 rnA -1.5 VVOH High Level Output Voltage 10H
=
-0.4 rnA, Vee = 4.5V to 5.5V Vee - 2 VVOL Low Level Output Voltage Vee
=
4.5V 54174ALS, 0.25 0.4 V10L
=
4 rnA74ALS,
0.35 0.5 V
10L
=
8mAII Input Current @ Vee
=
5.5V, VIH=
7V 0.1 rnAMax Input Voltage
IIH High Level Input Current Vee
=
5.5V, VIH=
2.7V 20 p.AIlL Low Level Input Current Vee
=
5.5V, VIL=
O.4V -0.1 rnA10 Output Drive Current Vee
=
5.5V Vo=
2.25V -30 -112 rnAlee Supply Current Vee
=
5.5V 54174ALS157 6 11 rnAAll Inputs
=
4.5V 54174ALS158 5 10 rnAfJ
Switching Characteristics
over recommended operating free air temperature range (Note 1).
From (Input) DM54ALS157,158 DM74ALS157,158
Units
Symbol Parameter To (Output) Conditions
Min Max Min Max
tpLH Propagation Delay Time 157 Data to Y Vee = 4.5V 4 17 4 14
Low to High Level Output
-
to 5.5V ns158 4 18 4 15
Propagation Delay Time
CL = 50 pF
tpHL 157 RL = 500n 2 15 2 12
-
nsHigh to Low Level Output 158 2 12 2 8
tpLH Propagation Delay Time 157 Strobe to Y 7 25 7 20
Low to High Level Output
-
ns158 5 22 5 18
tpHL Propagation Delay Time 157 4 18 4 13
High to Low Level Output
-
ns158 5 22 5 18
tpLH Propagation Delay Time 157 Select to Y 7 28 7 24
Low to High Level Output
-
ns158 5 22 5 18
tpHL Propagation Delay Time 157 4 16 4 13
High to Low Level Output
-
ns158 5 22 5 18
Note 1: See Section 1 for test waveforms and output load.