5-1
FAST AND LS TTL DATA
DUAL 4-INPUT MULTIPLEXER
The SN54 /74LS352 is a very high-speed Dual 4-input Multiplexer with
Common Select inputs and individual Enable inputs for each section. It can
select two bits of data from four sources. The two buffered outputs present
data in the inverted (complementary) form. The SN54/74LS352 is the func-
tional equivalent of the SN54/74LS153 except with inverted outputs.
•Inverted Version of the SN54/74LS153
•Separate Enables for Each Multiplexer
•Input Clamp Diode Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
14 13 12 11 10 9
1234567
16 15
8
VCC
Ea
EbS0I3b I2b I0b
I1b Zb
S1I3a I2a I1a I0a ZaGND
PIN NAMES LOADING (Note a)
HIGH LOW
S0, S1Common Select Inputs 0.5 U.L. 0.25 U.L.
EEnable (Active LOW) Input 0.5 U.L. 0.25 U.L.
I0–I1Multiplexer Inputs 0.5 U.L. 0.25 U.L.
ZMultiplexer Outputs (note b) 10 U.L. 5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
LOGIC DIAGRAM
EaEb
ZaZb
I0a I1a I2a I3a S1S0I0b I1b I2b I3b
14126
7
345
9
11 1210 13 15
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
SN54/74LS352
DUAL 4-INPUT MULTIPLEXER
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16 1
16
1
16 1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
VCC = PIN 16
GND = PIN 8
16543 10111213
14
2
79
E
aE
b
Z
a
Z
b
I
0a I1a I2a I3a
S0
S1
I0b I1b I2b I3b
15
5-2
FAST AND LS TTL DATA
SN54/74LS352
FUNCTIONAL DESCRIPTION
The SN54/74LS352 is a Dual 4-Input Multiplexer . It selects
two bits of data from up to four sources under the control of the
common Select Inputs (S0, S1). The two 4-input multiplexer
circuits have individual active LOW Enables (Ea, Eb) which
can be used to strobe the outputs independently. When the
Enables (Ea, Eb) are HIGH, the corresponding outputs (Za, Zb)
are forced HIGH.
The logic equations for the outputs are shown below.
Za = Ea •(I0a •S1 •S0 + I1a •S1 •S0 + I2a •S1 •S0 + I3a •S1 •S0)
Zb = Eb •(I0b •S1 •S0 + I1b •S1 •S0 + I2b •S1 •S0 + I3b • S1 •S0)
The SN54/74LS352 can be used to move data from a group
of registers to a common output bus. The particular register
from which the data came would be determined by the state of
the Select Inputs. A less obvious application is a function gen-
erator. The SN54/74LS352 can generate two functions of
three variables. This is useful for implementing highly irregular
random logic.
TRUTH TABLE
SELECT INPUTS INPUTS (a or b) OUTPUT
S0S1E I0I1I2I3Z
X X H X X X X H
LLLLXXXH
LLLHXXXL
HLLXLXXH
HLLXHXXL
LHLXXLXH
LHLXXHXL
HHLXXXLH
H HLXXXHL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 54
74 4.5
4.75 5.0
5.0 5.5
5.25 V
TAOperating Ambient Temperature Range 54
74 –55
025
25 125
70 °C
IOH Output Current — High 54, 74 –0.4 mA
IOL Output Current — Low 54
74 4.0
8.0 mA
5-3
FAST AND LS TTL DATA
SN54/74LS352
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Sbl
P
Limits
Ui
T C di i
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54 0.7
V
Guaranteed Input LOW Voltage for
V
IL
I
npu
t
LOW
V
o
lt
age 74 0.8
V
pg
All Inputs
VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54 2.5 3.5 V VCC = MIN, IOH = MAX, VIN = VIH
V
OH
O
u
t
pu
t
HIGH
V
o
lt
age 74 2.7 3.5 V
CC ,OH ,IN IH
or VIL per T ruth Table
VOL
Output LOW Voltage
54, 74 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN,
VIN =V
IL or VIH
V
OL
O
u
t
pu
t
LOW
V
o
lt
age 74 0.35 0.5 V IOL = 8.0 mA
V
IN =
V
IL or
V
IH
per T ruth Table
IIH
Input HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
I
IH
I
npu
t
HIGH
C
urren
t
0.1 mA VCC = MAX, VIN = 7.0 V
IIL Input LOW Current –0.4 mA VCC = MAX, VIN = 0.4 V
IOS Short Circuit Current (Note 1) –20 –100 mA VCC = MAX
ICC Power Supply Current 10 mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Sbl
P
Limits
Ui
T C di i
Symbol Parameter Min Typ Max Unit Test Conditions
tPLH
tPHL Propagation Delay,
Select to Output 19
25 29
38 ns Figure 1 or 2
V50V
tPLH
tPHL Propagation Delay,
Enable to Output 16
21 24
32 ns Figure 2 VCC = 5.0 V,
CL = 15 pF
tPLH
tPHL Propagation Delay,
Data to Output 13
17 20
26 ns Figure 1
Figure 1 Figure 2
VIN 1.3 V 1.3 V
1.3 VVOUT
tPHL tPLH
1.3 V
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
1.3 V
tPLH
AC WAVEFORMS
