4-157
FAST AND LS TTL DATA
DUAL 4-INPUT MULTIPLEXER
The MC54/74F352 is a very high speed dual 4-input multiplexer with com-
mon 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 F352 is the functional equivalent of
the F153 except with inverted outputs.
•Inverted Version of the F153
•Separate Enables for Each Multiplexer
•Input Clamp Diode Limits High-Speed Termination Effects
CONNECTION DIAGRAM (TOP VIEW)
1516 14 13 12 11 10
21 3 4 5 6 7
VCC
9
8
EbS0I3b I2b I1b I0b Zb
EaS1I3a I2a I1a I0a ZaGND
LOGIC DIAGRAM
Ea I0a I1a I2a I3a S1S0I0b I1b I2b I3b Eb
ZaZb
MC54/74F352
DUAL 4-INPUT
MULTIPLEXER
FAST SCHOTTKY TTL
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16 1
16
1
ORDERING INFORMATION
MC54FXXXJ Ceramic
MC74FXXXN Plastic
MC74FXXXD SOIC
16 1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
2 14
1
6
5
4
3
10
11
12
13
15
9
7Za
Zb
S1S0Ea
I0a
I1a
I2a
I3a
I0b
I1b
I2b
I3b
Eb
VCC = PIN 14
GND = PIN 7
4-158
FAST AND LS TTL DATA
MC54/74F352
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 54, 74 4.5 5.0 5.5 V
TAOperating Ambient Temperature Range
54 - 55 25 125
°C
A
74 0 25 70
°C
IOH Output Current — High 54, 74 –1.0 mA
IOL Output Current — Low 54, 74 20 mA
FUNCTIONAL DESCRIPTION
The F352 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:
The F352 can be used to move data from a group of regis-
ters 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 as a function gen-
erator. The F352 can generate two functions of three vari-
ables. This is useful for implementing highly irregular random
logic.
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)
FUNCTION TABLE
Select
Inputs Inputs (a or b) Output
S0S1E I0I1I2I3Z
X X H X X X X H
L L L L X X X H
L L L H X X X L
H L L X L X X H
H L L X H X X L
L H L X X L X H
L H L X X H X L
H H L X X X L H
H H L X X X H L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
4-159
FAST AND LS TTL DATA
MC54/74F352
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage
VIL Input LOW Voltage 0.8 V Guaranteed Input LOW Voltage
VIK Input Clamp Diode Voltage –1.2 V IIN = –18 mA VCC = MIN
VOH Output HIGH Voltage 54, 74 2.5 3.4 V IOH = –1.0 mA VCC = 4.50 V
74 2.7 3.4 V IOH = –1.0 mA VCC = 4.75 V
VOL Output LOW Voltage 0.35 0.5 V IOL = 20 mA VCC = MIN
IIH Input HIGH Current 20 µAVIN = 2.7 V VCC = MAX
100 VIN = 7.0 V
IIL Input LOW Current –0.6 mA VIN = 0.5 V VCC = MAX
IOS Output Short Circuit Current (Note 2) –60 –150 mA VOUT = 0 V VCC = MAX
ICCH Power Supply Current 9.3 14 mA VIN = GND VCC = MAX
ICCL 13.3 20 VIN = HIGH
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
54/74F 54F 74F
TA = +25°C TA = 55°C to +125°C TA = 0°C to + 70°C
VCC = +5.0 V VCC = 5.0 V ± 10% VCC = 5.0 V ± 10%
CL = 50 pF CL = 50 pF CL = 50 pF
Symbol Parameter Min Typ Max Min Max Min Max Unit
tPLH Propagation Delay 3.5 7.4 11 3.0 14 3.0 12.5 ns
tPHL Sn to Zn3.0 7.0 8.5 2.5 11 2.5 9.5
tPLH Propagation Delay 2.5 5.0 7.0 2.0 10 2.0 8.0 ns
tPHL En to Zn3.0 5.0 7.0 2.5 9.0 2.5 8.0
tPLH Propagation Delay 2.5 4.9 7.0 2.0 9.0 2.0 8.0 ns
tPHL In to Zn1.5 3.0 3.5 1.0 5.0 1.0 4.0
