NSC 54F253LMQB, 54F253DMQB, 54F253DC Datasheet
TL/F/9505
54F/74F253 Dual 4-Input Multiplexer with TRI-STATE Outputs
November 1994
54F/74F253
Dual 4-Input Multiplexer with TRI-STATE
É
Outputs
General Description
The ’F253 is a dual 4-input multiplexer with TRI-STATE
É
outputs. It can select two bits of data from four sources
using common select inputs. The output may be individually
switched to a high impedance state with a HIGH on the
respective Output Enable (OE
) inputs, allowing the outputs
to interface directly with bus oriented systems.
Features
Y
Multifunction capability
Y
Non-inverting TRI-STATE outputs
Y
Guaranteed 4000V minimum ESD protection
Commercial Military
Package
Package Description
Number
74F253PC N16E 16-Lead (0.300×Wide) Molded Dual-In-Line
54F253DM (Note 2) J16A 16-Lead Ceramic Dual-In-Line
74F253SC (Note 1) M16A 16-Lead (0.150×Wide) Molded Small Outline, JEDEC
74F253SJ (Note 1) M16D 16-Lead (0.300×Wide) Molded Small Outline, EIAJ
54F253FM (Note 2) W16A 16-Lead Cerpack
54F253LL (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13×reel. Use suffixeSCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix
e
DMQB, FMQB and LMQB.
Logic Symbols
TL/F/9505– 3
IEEE/IEC
TL/F/9505– 5
Connection Diagrams
Pin Assignment for
DIP, SOIC and Flatpak
TL/F/9505– 1
Pin Assignment
for LCC
TL/F/9505– 2
TRI-STATEÉis a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.
Unit Loading/Fan Out
54F/74F
Pin Names Description
U.L. Input I
IH/IIL
HIGH/LOW Output IOH/I
OL
I0a–I
3a
Side A Data Inputs 1.0/1.0 20 mA/b0.6 mA
I
0b–I3b
Side B Data Inputs 1.0/1.0 20 mA/b0.6 mA
S
0–S1
Common Select Inputs 1.0/1.0 20 mA/b0.6 mA
OE
a
Side A Output Enable Input (Active LOW) 1.0/1.0 20 mA/b0.6 mA
OE
b
Side B Output Enable Input (Active LOW) 1.0/1.0 20 mA/b0.6 mA
Za,Z
b
TRI-STATE Outputs 150/40(33.3)b3 mA/24 mA (20 mA)
Functional Description
This device contains two identical 4-input multiplexers with
TRI-STATE outputs. They select two bits from four sources
selected by common Select inputs (S
0,S1
). The 4-input mul-
tiplexers have individual Output Enable (OE
a
,OEb) inputs
which, when HIGH, force the outputs to a high impedance
(High Z) state. This device is the logic implementation of a
2-pole, 4-position switch, where the position of the switch is
determined by the logic levels supplied to the two select
inputs. The logic equations for the outputs are shown below:
Z
a
e
OE
a
#
(I
0a
#
S
1
#
S
0
a
I
1a
#
S
1
#
S
0
a
I
2a
#
S
1
#
S
0
a
I
3a
#
S
1
#
S0)
Z
b
e
OE
b
#
(I
0b
#
S
1
#
S
0
a
I
1b
#
S
1
#
S
0
a
I
2b
#
S
1
#
S
0
a
I
3b
#
S
1
#
S0)
If the outputs of TRI-STATE devices are tied together, all
but one device must be in the high impedance state to avoid
high currents that would exceed the maximum ratings. Designers should ensure that Output Enable signals to TRISTATE devices whose outputs are tied together are designed so that there is no overlap.
Truth Table
Select
Data Inputs
Output
Output
Inputs Enable
S0S1I0I1I2I
3
OE Z
X X XXXX H Z
L L LXXX L L
L L HXXX L H
H L XLXX L L
H L XHXX L H
L H XXLX L L
L H XXHX L H
H H XXXL L L
H H XXXH L H
Address inputs S0and S1are common to both sections.
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
Z
e
High Impedance
Logic Diagram
TL/F/9505– 4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Storage Temperature
b
65§Ctoa150§C
Ambient Temperature under Bias
b
55§Ctoa125§C
Junction Temperature under Bias
b
55§Ctoa175§C
Plastic
b
55§Ctoa150§C
VCCPin Potential to
Ground Pin
b
0.5V toa7.0V
Input Voltage (Note 2)
b
0.5V toa7.0V
Input Current (Note 2)
b
30 mA toa5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
Standard Output
b
0.5V to V
CC
TRI-STATE Output
b
0.5V toa5.5V
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
ESD Last Passing Voltage (Min) 4000V
Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
b
55§Ctoa125§C
Commercial 0
§
Ctoa70§C
Supply Voltage
Military
a
4.5V toa5.5V
Commercial
a
4.5V toa5.5V
DC Electrical Characteristics
Symbol Parameter
54F/74F
Units V
CC
Conditions
Min Typ Max
V
IH
Input HIGH Voltage 2.0 V Recognized as a HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage
b
1.2 V Min I
IN
eb
18 mA
V
OH
Output HIGH 54F 10% V
CC
2.5 I
OH
eb
1mA
Voltage 54F 10% V
CC
2.4 I
OH
eb
3mA
74F 10% V
CC
2.5
V Min
I
OH
eb
1mA
74F 10% V
CC
2.4 I
OH
eb
3mA
74F 5% V
CC
2.7 I
OH
eb
1mA
74F 5% V
CC
2.7 I
OH
eb
3mA
V
OL
Output LOW 54F 10% V
CC
0.5
V Min
I
OL
e
20 mA
Voltage 74F 10% V
CC
0.5 I
OL
e
24 mA
I
IH
Input HIGH 54F 20.0
mA Max V
IN
e
2.7V
Current 74F 5.0
I
BVI
Input HIGH Current 54F 100
mA Max
V
IN
e
7.0V
Breakdown Test 74F 7.0
I
CEX
Output HIGH 54F 250
mA Max V
OUT
e
V
CC
Leakage Current 74F 50
V
ID
Input Leakage
74F 4.75 V 0.0
I
ID
e
1.9 mA
Test All Other Pins Grounded
I
OD
Output Leakage
74F 3.75 mA 0.0
V
IOD
e
150 mV
Circuit Current All Other Pins Grounded
I
IL
Input LOW Current
b
0.6 mA Max V
IN
e
0.5V
I
OZH
Output Leakage Current 50 mA Max V
OUT
e
2.7V
I
OZL
Output Leakage Current
b
50 mA Max V
OUT
e
0.5V
I
OS
Output Short-Circuit Current
b
60
b
150
mA Max
V
OUT
e
0V
b
100
b
225 V
OUT
e
0V
I
ZZ
Bus Drainage Test 500 mA 0.0V V
OUT
e
V
CC
I
CCH
Power Supply Current 11.5 16 mA Max V
O
e
HIGH
I
CCL
Power Supply Current 16 23 mA Max V
O
e
LOW
I
CCZ
Power Supply Current 16 23 mA Max V
O
e
HIGH Z
3
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