74F537 1-of-10 Decoder with 3-STATE Outputs
April 1988
Revised August 1999
74F537
1-of-10 Decoder with 3-STATE Outputs
General Description
The 74F537 is one-of-ten decoder/demultiplexer with four
active HIGH BCD inputs and ten mutually exclusive out-
puts. A polarity control input determines whether the out-
puts are active LOW or active HIGH. The 74F537 has 3-
STATE outputs, and a HIGH signal on the Output Enable
(OE) input forces all outputs to the high impedance state.
Two input enables, active HIGH E
2
and active LOW E
1
, are
available for demultiplexing data to the selected output in
either non-inverted or inverted form. Input codes greater
than BCD nine cause all outputs to go to the inactive state
(i.e., same polarity as the P input).
Ordering Code:
Order Number
74F537SC
74F537PC
Package Number
M20B
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
© 1999 Fairchild Semiconductor Corporation
DS009550
www.fairchildsemi.com
74F537
Unit Loading/Fan Out
U.L.
Pin Names
A
0
–A
3
E
1
E
2
OE
P
O
0
–O
9
Description
HIGH/LOW
Address Inputs
Enable Input (Active LOW)
Enable Input (Active HIGH)
Output Enable Input (Active LOW)
Polarity Control Input
3-STATE Outputs
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
150/40 (33.3)
Input I
IH
/I
IL
Output I
OH
/I
OL
20
µA/−0.6
mA
20
µA/−0.6
mA
20
µA/−0.6
mA
20
µA/−0.6
mA
20
µA/−0.6
mA
−3
mA/24 mA (20 mA)
Truth Table
Inputs
Function
High Impedance
Disable
Active HIGH
Output
(P
=
L)
OE E
1
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
Active LOW
Output
(P
=
H)
L
L
L
L
L
L
L
L
L
L
L
L
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
Outputs
E
2
X
X
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
A
3
A
2
A
1
A
0
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
O
8
O
9
X
X
X
L
L
L
L
L
L
L
L
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
X
X
X
L
L
L
L
H
H
H
H
L
L
X
H
L
L
L
L
H
H
H
H
L
L
X
H
X
X
X
L
L
H
H
L
L
H
H
L
L
H
X
L
L
H
H
L
L
H
H
L
L
H
X
X
X
X
L
H
L
H
L
H
L
H
L
H
X
X
L
H
L
H
L
H
L
H
L
H
X
X
H
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
L
H
L
L
L
L
L
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
L
L
H
L
L
L
L
L
L
L
L
L
H
H
L
H
H
H
H
H
H
H
H
H
L
L
L
H
L
L
L
L
L
L
L
L
H
H
H
L
H
H
H
H
H
H
H
H
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
X
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
Outputs Equal P Input
L
L
L
L
H
L
L
L
L
L
L
L
H
H
H
H
L
H
H
H
H
H
H
H
L
L
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
L
H
H
H
H
H
H
L
L
L
L
L
L
H
L
L
L
L
L
H
H
H
H
H
H
L
H
H
H
H
H
L
L
L
L
L
L
L
H
L
L
L
L
H
H
H
H
H
H
H
L
H
H
H
H
L
L
L
L
L
L
L
L
H
L
L
L
H
H
H
H
H
H
H
H
L
H
H
H
L
L
L
L
L
L
L
L
L
H
L
L
H
H
H
H
H
H
H
H
H
L
H
H
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2
74F537
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
twice the rated I
OL
(mA)
−0.5V
to V
CC
−0.5V
to
+5.5V
−65°C
to
+150°C
−55°C
to
+125°C
−55°C
to
+150°C
−0.5V
to
+7.0V
−0.5V
to
+7.0V
−30
mA to
+5.0
mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to
+70°C
+4.5V
to
+5.5V
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.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
10% V
CC
10% V
CC
5% V
CC
5% V
CC
V
OL
I
IH
I
BVI
I
CEX
V
ID
I
OD
I
IL
I
OZH
I
OZL
I
OS
I
ZZ
I
CCH
I
CCZ
Output LOW Voltage
Input HIGH Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current
Power Supply Current
44
−60
4.75
3.75
−0.6
50
−50
−150
500
56
66
10% V
CC
2.5
2.4
2.7
2.7
0.5
5.0
7.0
50
V
µA
µA
µA
V
µA
mA
µA
µA
mA
µA
mA
mA
Min
Max
Max
Max
0.0
0.0
Max
Max
Max
Max
0.0V
Max
Max
V
Min
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −1
mA
I
OH
= −3
mA
I
OH
= −1
mA
I
OH
= −3
mA
I
OL
=
24 mA
V
IN
=
2.7V
V
IN
=
7.0V
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
V
IN
=
0.5V
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
0V
V
OUT
=
5.25V
V
O
=
HIGH
V
O
=
HIGH Z
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4
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