SGS Thomson Microelectronics 74AC158 Datasheet
QUAD 2 CHANNEL MULTIPLEXER (INV.)
■ HIGH SPEED:t
■ LOWPOWERDISSIPATION:
=8µA (MAX.)at TA=25oC
I
CC
■ HIGH NOISE IMMUNITY:
V
NIH=VNIL
■ 50Ω TRANSMISSION LINE DRIVING
CAPABILITY
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
|=IOL=24mA(MIN)
OH
■ BALANCE DPROPAGATIONDELAYS:
t
≅ t
PLH
PHL
■ OPERATINGVOLTAGERANGE:
V
(OPR) = 2V to 6V
CC
■ PIN AND FUNCTION COMPATIBLE WITH
74SERIES158
■ IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The AC158 is an high-speed CMOS QUAD
2-CHANNEL MULTIPLEXER (INVERTING)
fabricated with sub-micron silicon gate and
double-layermetal wiring C
ideal for low power applications maintaining high
speed operation similar to equivalent Bipolar
SchottkyTTL.
=4 ns(TYP.)atVCC=5V
PD
=28%VCC(MIN.)
2
MOS technology. Itis
74AC158
PRELIMINARY DATA
B
(Plastic Package)
(Micro Package)
ORDERCODES:
74AC158B 74AC158M
It consists of four 2-input digital multiplexers 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 theircorresponding Y outputs.
All inputs and outputs are equipped with
protectioncircuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
M
PINCONNECTION ANDIEC LOGICSYMBOLS
May 1997
1/9
74AC158
INPUTAND OUTPUT EQUIVALENTCIRCUIT
PIN DESCRIPTION
PI N No SYM B O L NAME AND FUNC T I ON
1 SELECT Common Data Select Input
2,5, 11,14 1Ato4A Data Inputs From
Source A
3,6, 10,13 1Bto4B Data Inputs From
Source B
4,7, 9,12 1Yto4Y Multiplexer Outputs
15 STROBE Strobe Input
8 GND Ground (0V)
16 V
CC
Positive Supply Voltage
TRUTH TABLE
INPUT OUTPUT
ST RO B E SE L ECT A B Y
HXXXH
LLLXH
LLHXL
LHXLH
LHXHL
LOGICDIAGRAM
2/9
74AC158
ABSOLUTE MAXIMUM RATING
Symb o l Parame t er Value Unit
V
V
V
I
I
OK
I
orI
I
CC
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATINGCONDITIONS
Symb o l Parame t er Val u e Uni t
V
V
V
T
dt/dv Input Rise and Fall Time V
1) VINfrom30%to 70%of V
Supply Voltage -0.5to+7 V
CC
DC Input Voltage -0.5toVCC+0.5 V
I
DC Output Voltage -0.5toVCC+0.5 V
O
DC Input Diode Current ± 20 mA
IK
DC Output Diode Current ± 20 mA
DC Output Current ± 50 mA
O
DC VCCor Ground Current ± 200 mA
GND
Storage Temperature -65to+150
stg
Lead Temperature (10 sec) 300
L
Supply Voltage 2to6 V
CC
Input Voltage 0toV
I
Output Voltage 0toV
O
Operating Temperature: -40to+85
op
= 3.0, 4.5 or 5.5 V(note 1) 8 ns/V
CC
CC
CC
CC
o
C
o
C
V
V
o
C
3/9
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