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© 1999 Fairchild Semiconductor Corporation DS009550 www.fairchildsemi.com
April 1988
Revised August 1999
74F537 1-of-10 Decoder with 3-STATE Outputs
74F537
1-of-10 Decoder with 3-STATE Outputs
General Description
The 74F537 is on e-of-ten decode r/demultiplexer wit h four
active HIGH BCD inputs and ten m utually exclusive outputs. A polarity control input determines wheth er the outputs are active LOW or active HIGH. T he 74F537 has 3STAT E outputs, and a HIGH signal on the Ou tput Enable
(OE
) input forces all outputs to the high impeda nce state.
Two input enables, active HIGH E
2
and active LOW E1, are
available for demul tiplexing data to th e selected output in
either non-inverted or inve rted 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:
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Order Number Package Number Package Description
74F537SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F537PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
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74F537
Unit Loading/Fan Out
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Pin Names Description
U.L. Input I
IH/IIL
HIGH/LOW Output IOH/I
OL
A0–A
3
Address Inputs 1.0/1.0 20 µA/−0.6 mA
E
1
Enable Input (Active LOW) 1.0/1.0 20 µA/−0.6 mA
E
2
Enable Input (Active HIGH) 1.0/1.0 20 µA/−0.6 mA
OE
Output Enable Input (Active LOW) 1.0/1.0 20 µA/−0.6 mA
P Polarity Control Input 1.0/1.0 20 µA/−0.6 mA
O
0–O9
3-STATE Outputs 150/40 (33.3) −3 mA/24 mA (20 mA)
Function
Inputs Outputs
OE
E1E2A3A2A1A0O0O1O2O3O4O5O6O7O8O
9
High Impedance HXXXXXXZZZZZZZZZZ
Disable LHXXXXX
Outputs Equal P Input
LXLXXXX
Active HIGH LLHLLLLH LLLLLLLLL
Output LLHLLLH LHLLLLLLLL
(P = L) LLHLLHLLLHLLLLLLL
LLHLLHHLLLHLLLLLL
LLHLH LLLLLLHLLLLL
LLHLH LHLLLLLHLLLL
LLHLHHLLLLLLLHLLL
LLHLHHHLLLLLLLHLL
LLHHLLLLLLLLLLLHL
LLHHLLHLLLLLLLLLH
LLHHXHXLLLLLLLLLL
LLHHHXXLLLLLLLLLL
Active LOW LLHLLLLLHHHHHHHHH
Output LLHLL LHHLHHHHHHHH
(P = H) LLHLLHLHHLHHHHHHH
LLHLLHHHHHLHHHHHH
LLHLHL LHHHHLHHHHH
LLHLHLHHHHHHLHHHH
LLHLHHLHHHHHHLHHH
LLHLHHHHHHHHHHLHH
LLHHLL LHHHHHHHHLH
LLHHLLHHHHHHHHHHL
LLHHXHXHHHHHHHHHH
LLHHHXXHHHHHHHHHH
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74F537
Logic Diagram
Please note that this d iagram is provided only f or t he understanding of lo gic operations and should not be used to estimat e propagation delays.
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74F537
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditi ons is not implied.
Note 2: Either voltage limit or curren t limit is sufficient to protect in put s .
DC Electrical Characteristics
Storage Temperature −65°C to +150°C
Ambient Temperature under Bias −55°C to +125°C
Junction Temperature under Bias −55°C to +150°C
V
CC
Pin Potential to Ground Pin −0.5V to +7.0V
Input Voltage (Note 2) −0.5V to +7.0V
Input Current (Note 2) −30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
= 0V)
Standard Output −0.5V to V
CC
3-STATE Output −0.5V to +5.5V
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
Free Air Ambient Temperature 0°C to +70°C
Supply Voltage +4.5V to +5.5V
Symbol Parameter Min Typ Max Units
V
CC
Conditions
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 −1.2 V Min IIN = −18 mA
V
OH
Output HIGH 10% V
CC
2.5
VMin
IOH = −1 mA
Voltage 10% V
CC
2.4 IOH = −3 mA
5% V
CC
2.7 IOH = −1 mA
5% V
CC
2.7 IOH = −3 mA
V
OL
Output LOW Voltage 10% V
CC
0.5 V Min IOL = 24 mA
I
IH
Input HIGH Current 5.0 µAMaxVIN = 2.7V
I
BVI
Input HIGH Current
7.0 µAMaxVIN = 7.0V
Breakdown Test
I
CEX
Output HIGH
50 µAMaxV
OUT
= V
CC
Leakage Current
V
ID
Input Leakage
4.75 V 0.0
IID = 1.9 µA
Test All Other Pins Grounded
I
OD
Output Leakage
3.75 µA0.0
V
IOD
= 150 mV
Circuit Current All Other Pins Grounded
I
IL
Input LOW Current −0.6 mA Max VIN = 0.5V
I
OZH
Output Leakage Current 50 µAMaxV
OUT
= 2.7V
I
OZL
Output Leakage Current −50 µAMaxV
OUT
= 0.5V
I
OS
Output Short-Circuit Current −60 −150 mA Max V
OUT
= 0V
I
ZZ
Bus Drainage Test 500 µA0.0VV
OUT
= 5.25V
I
CCH
Power Supply Current 56 mA Max VO = HIGH
I
CCZ
Power Supply Current 44 66 mA Max VO = HIGH Z
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74F537
AC Electrical Characteristics
Symbol Parameter
TA = +25°CT
A
= 0°C to +70°C
Units
VCC = +5.0V VCC = +5.0V
CL = 50 pF CL = 50 pF
Min Typ Max Min Max
t
PLH
Propagation Delay 6.0 11.0 16.0 6.0 17.0
ns
t
PHL
An to O
n
4.0 7.5 11.0 4.0 12.0
t
PLH
Propagation Delay 5.0 8.5 14.5 5.0 15.5
t
PHL
E1 to O
n
4.0 6.5 9.0 4.0 10.0
t
PLH
Propagation Delay 6.0 11.0 16.0 6.0 17.0
ns
t
PHL
E2 to O
n
5.0 10.0 14.0 5.0 15.0
t
PLH
Propagation Delay 6.0 11.5 18.0 6.0 20.0
t
PHL
P to O
n
6.0 11.0 16.0 6.0 17.0
t
PZH
Output Enable Time 3.0 5.5 10.5 3.0 11.5
ns
t
PZL
OE to O
n
5.0 9.0 13.0 5.0 14.0
t
PHZ
Output Disable Time 2.0 4.0 6.0 2.0 7.0
t
PLZ
OE to O
n
3.0 5.0 7.0 3.0 8.0
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74F537
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
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74F537 1-of-10 Decoder with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N20A
Fairchild does not assume any responsibility for use of any circu itry described, no circuit patent license s are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are dev ic es or syste ms
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided i n the labe li ng, can be re asonably expected to result in a significant injury to the
user.
2. A critical componen t in any com ponent o f a l ife supp ort
device or system whose failu re to perform can b e reasonably expected to c ause th e fa i lure of the li fe s upp or t
device or system, or to affect its safety or effectiveness.
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