FAIRCHILD 74LVX138SJX

Revised October 2003
74LVX138
Low Voltage 1-of-8 Decoder/Demultiplexer
General Description
Features
The LVX138 is a high-speed 1-of-8 decoder/demultiplexer.
This device is ideally suited for high-speed bipolar memory
chip select address decoding. The multiple input enables
allow parallel expansion to a 1-of-24 decoder using just
three LVX138 devices or a 1-of-32 decoder using four
LVX138 devices and one inverter.
■ Input voltage level translation from 5V to 3V
■ Ideal for low power/low noise 3.3V applications
■ Guaranteed simultaneous switching noise level and
dynamic threshold performance
Ordering Code:
Order Number
74LVX138M
74LVX138SJ
74LVX138MTC
Package Number
Package Description
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
Pin Descriptions
Pin Names
IEEE/IEC
© 2003 Fairchild Semiconductor Corporation
DS011615
Description
A0–A2
Address Inputs
E1 – E2
Enable Inputs
E3
Enable Input
O0–O7
Outputs
www.fairchildsemi.com
74LVX138 Low Voltage 1-of-8 Decoder/Demultiplexer
June 1993
74LVX138
Functional Description
All outputs will be HIGH unless E1 and E2 are LOW and E3
is HIGH.
The LVX138 high-speed 1-of-8 decoder/demultiplexer
accepts three binary weighted inputs (A0, A1, A2) and,
when enabled, provides eight mutually exclusive activeLOW outputs (O0–O7). The LVX138 features three Enable
inputs, two active-LOW (E1, E2) and one active-HIGH (E3).
The LVX138 can be used as an 8-output demultiplexer by
using one of the active LOW Enable inputs as the data
input and the other Enable inputs as strobes. The Enable
inputs which are not used must be permanently tied to their
appropriate active-HIGH or active-LOW state.
Truth Table
Inputs
Outputs
E1
E2
E3
A0
A1
A2
O0
O1
O2
O3
O4
O5
O6
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
L
X
X
X
H
H
H
H
H
H
H
H
L
L
H
L
L
L
L
H
H
H
H
H
H
H
L
L
H
H
L
L
H
L
H
H
H
H
H
H
L
L
H
L
H
L
H
H
L
H
H
H
H
H
L
L
H
H
H
L
H
H
H
L
H
H
H
H
L
L
H
L
L
H
H
H
H
H
L
H
H
H
L
L
H
H
L
H
H
H
H
H
H
L
H
H
L
L
H
L
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
H
H
H
H
H
H
H
H
L
O7
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.fairchildsemi.com
2
Recommended Operating
Conditions (Note 2)
−0.5V to +7.0V
Supply Voltage (VCC)
DC Input Diode Current (IIK)
Supply Voltage (VCC)
VI = −0.5V
−20 mA
−0.5V to 7V
DC Input Voltage (VI)
2.0V to 3.6V
Input Voltage (VI)
0V to 5.5V
Output Voltage (VO)
DC Output Diode Current (IOK)
0V to VCC
−40°C to +85°C
Operating Temperature (TA)
VO = −0.5V
−20 mA
VO = VCC + 0.5V
+20 mA
Input Rise and Fall Time (∆t/∆V)
−0.5V to VCC + 0.5V
DC Output Voltage (VO)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
DC Output Source
±25 mA
or Sink Current (IO)
±75 mA
DC VCC or Ground Current (ICC or IGND)
−65°C to +150 °C
Storage Temperature (TSTG)
Power Dissipation
0 ns/V to 100 ns/V
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
180 mW
DC Electrical Characteristics
Symbol
VIH
VIL
VOH
VOL
Parameter
VCC
TA = +25°C
Min
TA = −40°C to +85°C
Typ
Max
Min
HIGH Level
2.0
1.5
1.5
Input Voltage
3.0
2.0
2.0
3.6
2.4
2.4
2.0
0.5
0.5
Input Voltage
3.0
0.8
0.8
3.6
0.8
0.8
HIGH Level
2.0
1.9
2.0
1.9
3.0
2.9
3.0
2.9
3.0
2.58
Conditions
V
LOW Level
Output Voltage
Units
Max
V
VIN = VIL or VIH IOH = −50 µA
IOH = −50 µA
V
IOH = −4 mA
2.48
LOW Level
2.0
0.0
Output Voltage
3.0
0.0
0.1
VIN = VIL or VIH IOL = 50 µA
0.1
0.1
0.1
3.0
0.36
0.44
IOL = 50 µA
V
IOL = 4 mA
IIN
Input Leakage Current
3.6
±0.1
±1.0
µA
VIN = 5.5V or GND
ICC
Quiescent Supply Current
3.6
4.0
40.0
µA
VIN = VCC or GND
Noise Characteristics (Note 3)
Symbol
VCC
Parameter
(V)
TA = 25°C
Typ
Limit
Units
CL (pF)
VOLP
Quiet Output Maximum Dynamic VOL
3.3
0.3
0.5
V
50
VOLV
Quiet Output Minimum Dynamic VOL
3.3
−0.3
−0.5
V
50
VIHD
Minimum HIGH Level Dynamic Input Voltage
3.3
2.0
V
50
VILD
Maximum LOW Level Dynamic Input Voltage
3.3
0.8
V
50
Note 3: Input tr = tf = 3 ns
3
www.fairchildsemi.com
74LVX138
Absolute Maximum Ratings(Note 1)
74LVX138
AC Electrical Characteristics
Symbol
Parameter
tPLH
Propagation
tPHL
Delay Time
An to On
tPLH
Propagation
tPHL
Delay Time
E1 or E2 to On
tPLH
Propagation
tPHL
Delay Time
E3 to On
TA = +25°C
VCC
(V)
2.7
3.3 ± 0.3
2.7
3.3 ± 0.3
2.7
3.3 ± 0.3
Min
TA = −40°C to +85°C
Units
CL (pF)
Typ
Max
Min
Max
7.1
13.8
1.0
16.5
9.6
17.3
1.0
20.0
5.5
8.8
1.0
10.5
8.0
12.3
1.0
14.0
50
8.8
16.0
1.0
18.5
15
15
50
ns
15
11.3
19.5
1.0
22.0
6.9
10.4
1.0
11.5
9.4
13.9
1.0
15.0
50
8.7
16.3
1.0
19.5
15
11.2
19.8
1.0
23.0
6.8
10.6
1.0
12.5
9.3
14.1
1.0
50
ns
15
50
ns
15
16.0
50
tOSHL
Output to Output
2.7
1.5
1.5
50
tOSLH
Skew (Note 4)
3.3
1.5
1.5
ns
Note 4: Parameter guaranteed by design. tOSLH = |tPLHm–tPLHn|, tOSHL = |tPHLm–tPHLn|
Capacitance
Symbol
TA = +25°C
Parameter
Min
TA = −40°C to +85°C
Typ
Max
10
CIN
Input Capacitance
4
CPD
Power Dissipation Capacitance (Note 5)
34
Min
Max
10
Note 5: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: CPD × VCC × IIN + ICC
www.fairchildsemi.com
4
Units
pF
pF
74LVX138
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M16A
5
www.fairchildsemi.com
74LVX138
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
www.fairchildsemi.com
6
74LVX138 Low Voltage 1-of-8 Decoder/Demultiplexer
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC16
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses 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:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
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 in the labeling, can be reasonably expected to result in a significant injury to the
user.
www.fairchildsemi.com
7
www.fairchildsemi.com