74ACT158
QUAD 2 CHANNEL MULTIPLEXER (INV.)
s
s
s
s
s
s
s
s
s
HIGH SPEED: t
PD
= 6.5ns (TYP.) at V
CC
= 5V
LOW POWER DISSIPATION:
I
CC
= 4µA(MAX.) at T
A
=25°C
COMPATIBLE WITH TTL OUTPUTS
V
IH
= 2V (MIN.), V
IL
= 0.8V (MAX.)
50Ω TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN)
BALANCED PROPAGATION DELAYS:
t
PLH
≅
t
PHL
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 4.5V to 5.5V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 158
IMPROVED LATCH-UP IMMUNITY
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
DIP
SOP
TSSOP
TUBE
74ACT158B
74ACT158M
T&R
74ACT158MTR
74ACT158TTR
DESCRIPTION
The 74ACT158 is an advanced high-speed CMOS
QUAD 2-CHANNEL MULTIPLEXER fabricated
with sub-micron silicon gate and double-layer
metal wiring C
2
MOS tecnology.
It consists of four 2-input digital multiplexer with
common select and strobe inputs. It is an inverting
multiplexer. When the STROBE input is held high
selection of data is inhibit and all the outputs
become high. The SELECT decoding determines
whether the A or B inputs get routed to their
corresponding Y outputs.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 2001
1/10
74ACT158
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
STROBE
GND
V
CC
NAME AND FUNCTION
Common Data Select
Inputs
Data Inputs From Source
A
Data Inputs From Source
B
Multiplexer Outputs
Strobe Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
STROBE
H
L
L
L
L
X : Don’t Care
OUTPUT
A
X
L
H
X
X
B
X
X
X
L
H
Y
H
H
L
H
L
SELECT
X
L
L
H
H
LOGIC DIAGRAM
2/10
74ACT158
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
Parameter
Value
-0.5 to +7
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±
20
±
20
±
50
±
200
-65 to +150
300
Unit
V
V
V
mA
mA
mA
mA
°C
°C
I
CC
or I
GND
DC V
CC
or Ground Current
Storage Temperature
T
stg
T
L
Lead Temperature (10 sec)
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
T
op
dt/dv
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time V
CC
= 4.5 to 5.5V (note 1)
Parameter
Value
4.5 to 5.5
0 to V
CC
0 to V
CC
-55 to 125
8
Unit
V
V
V
°C
ns/V
1) V
IN
from 0.8 V to 2.0 V
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74ACT158
DC SPECIFICATIONS
Test Condition
Symbol
Parameter
V
CC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
V
OL
Low Level Output
Voltage
4.5
5.5
4.5
5.5
I
I
I
CCT
I
CC
I
OLD
I
OHD
Input Leakage Cur-
rent
Max I
CC
/Input
Quiescent Supply
Current
Dynamic Output
Current (note 1, 2)
5.5
5.5
5.5
5.5
V
O
= 0.1 V or
V
CC
-0.1V
V
O
= 0.1 V or
V
CC
-0.1V
I
O
=-50
µA
I
O
=-50
µA
I
O
=-24 mA
I
O
=-24 mA
I
O
=50
µA
I
O
=50
µA
I
O
=24 mA
I
O
=24 mA
V
I
= V
CC
or GND
V
I
= V
CC
- 2.1V
V
I
= V
CC
or GND
V
OLD
= 1.65 V max
V
OHD
= 3.85 V min
0.6
4
4.4
5.4
3.86
4.86
0.001
0.001
0.1
0.1
0.36
0.36
± 0.1
T
A
= 25°C
Min.
2.0
2.0
Typ.
1.5
1.5
1.5
1.5
4.49
5.49
0.8
0.8
4.4
5.4
3.76
4.76
0.1
0.1
0.44
0.44
±1
1.5
40
75
-75
Max.
Value
-40 to 85°C
Min.
2.0
2.0
0.8
0.8
4.4
5.4
3.7
4.7
0.1
0.1
0.5
0.5
±1
1.6
80
50
-50
µA
mA
µA
mA
mA
V
Max.
-55 to 125°C
Min.
2.0
2.0
0.8
0.8
V
Max.
V
Unit
V
IH
V
IL
V
OH
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on trasmission lines with impedances as low as 50Ω
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, R
L
= 500
Ω,
Input t
r
= t
f
= 3ns)
Test Condition
Symbol
Parameter
V
CC
(V)
Value
T
A
= 25°C
Min.
1.5
1.5
1.5
Typ.
6.5
6.0
5.5
Max.
9.5
9.5
8.5
-40 to 85°C
Min.
1.0
1.0
1.0
Max.
10.0
10.0
8.5
-55 to 125°C
Min.
1.0
1.0
1.0
Max.
10.0
10.0
9.5
Unit
t
PLH
t
PHL
Propagation Delay
(*)
Time SELECT to Y 5.0
t
PLH
t
PHL
Propagation Delay
(*)
Time STROBE to Y 5.0
t
PLH
t
PHL
Propagation Delay
5.0
(*)
Time A, B to Y
(*) Voltage range is 5.0V ± 0.5V
ns
ns
ns
4/10
74ACT158
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
V
CC
(V)
5.0
5.0
f
IN
= 10MHz
T
A
= 25°C
Min.
Typ.
4.5
37
Max.
Value
-40 to 85°C
Min.
Max.
-55 to 125°C
Min.
Max.
pF
pF
Unit
C
IN
C
PD
Input Capacitance
Power Dissipation
Capacitance (note
1)
1) C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/n (per circuit)
TEST CIRCUIT
C
L
= 50pF or equivalent (includes jig and probe capacitance)
R
L
= R
1
= 500Ω or equivalent
R
T
= Z
OUT
of pulse generator (typically 50Ω)
5/10
