74LCX138M [ONSEMI]
低电压1:8解码器/解复用器，5V容许输入电压;
| 型号： | 74LCX138M |
| 厂家： | 
ONSEMI |
| 描述： | 低电压1:8解码器/解复用器，5V容许输入电压 PC 驱动 光电二极管 逻辑集成电路 复用器 解复用器 解码器 |
| 文件： | 总14页 (文件大小：564K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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March 1995
Revised December 2013
74LCX138
Low Voltage 1-of-8 Decoder/Demultiplexer
with 5V Tolerant Inputs
General Description
Features
■ 5V tolerant inputs
The LCX138 is a high-speed 1-of-8 decoder/demultiplexer.
This device is ideally suited for high-speed memory chip
select address decoding. The multiple input enables allow
parallel expansion to a 1-of-24 decoder using just three
LCX138 devices or a 1-of-32 decoder using four LCX138
devices and one inverter.
■ 2.3V to 3.6V VCC specifications provided
■ 6.0 ns tPD max (VCC = 3.3V), 10 µA ICC max
■ Power down high impedance inputs and outputs
■ ±24 mA output drive (VCC = 3.0V)
The 74LCX138 is fabricated with advanced CMOS technol-
ogy to achieve high speed operation while maintaining
CMOS low power dissipation.
■ Implements patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 500 mA
■ ESD performance:
Human body model > 2000V
Machine model > 200V
■ Leadless DQFN package
Ordering Code:
Package
Order Number
Package Description
Number
74LCX138M
(Note 1)
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX138SJ
(Note 1)
M16D
74LCX138BQX
(Note 2)
MLP016E
MTC16
16-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241,
2.5 x 3.5mm
74LCX138MTC
(Note 1)
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Note 1: Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Note 2: DQFN package available in Tape and Reel only.
2013
Fairchild Semiconductor Corporation
©
DS012417
www.fairchildsemi.com
Connection Diagrams
Pin Descriptions
Pin Assignments for SOIC, SOP, and TSSOP
Pin Names
A0–A2
Description
Address Inputs
Enable Inputs
Enable Input
Outputs
E1–E2
E3
O0–O7
DAP
No Connect
Note: DAP (Die Attach Pad)
Pad Assignments for DQFN
Functional Description
The LCX138 high-speed 1-of-8 decoder/demultiplexer
accepts three binary weighted inputs (A0, A1, A2) and,
when enabled, provides eight mutually exclusive active-
LOW outputs (O0–O7). The LCX138 features three Enable
inputs, two active-LOW (E1, E2) and one active-HIGH (E3).
All outputs will be HIGH unless E1 and E2 are LOW and E3
is HIGH. The LCX138 can be used as an 8-output demulti-
plexer 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.
(Top Through View)
(Bottom View)
Truth Table
Inputs
Outputs
E1
E2
E3
A0
A1
A2
O0
O1
O2
O3
O4
O5
O6
O7
H
X
X
X
H
X
X
X
L
X
X
X
X
X
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
L
H
L
L
L
L
L
L
L
L
H
H
H
H
L
H
H
L
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
L
H
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
H
L
H
H
H
L
H
H
H
H
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
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2
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.
3
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Absolute Maximum Ratings(Note 3)
Symbol
VCC
VI
Parameter
Supply Voltage
Value
Conditions
Units
V
−0.5 to +7.0
−0.5 to +7.0
DC Input Voltage
V
VO
DC Output Voltage
−0.5 to VCC + 0.5 Output in HIGH or LOW State (Note 4)
V
IIK
DC Input Diode Current
DC Output Diode Current
−50
−50
VI < GND
mA
IOK
V
V
O < GND
O > VCC
mA
+50
IO
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
±50
mA
mA
mA
°C
ICC
±100
IGND
TSTG
±100
−65 to +150
Recommended Operating Conditions (Note 5)
Symbol
Parameter
Min
2.0
1.5
0.0
0.0
Max
3.6
Units
VCC
Supply Voltage
Operating
Data Retention
V
3.6
VI
Input Voltage
Output Voltage
Output Current
5.5
V
V
VO
HIGH or LOW State
VCC
±24.0
±12.0
±8.0
85.0
10.0
I
OH/IOL
V
V
V
CC = 3.0V to 3.6V
CC = 2.7V to 3.0V
CC = 2.3V to 2.7V
mA
TA
Free-Air Operating Temperature
−40.0
°C
∆t/∆V
Input Edge Rate, VIN = 0.8V to 2.0V, VCC = 3.0V
0.0
ns/V
Note 3: 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 “Recom-
mended Operating Conditions” table will define the conditions for actual device operation.
Note 4: IO Absolute Maximum Rating must be observed.
Note 5: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
VCC
TA = −40°C to +85°C
Symbol
VIH
Parameter
Conditions
Units
(V)
2.3 to 2.7
2.7 to 3.6
2.3 to 2.7
2.7 to 3.6
2.3 to 3.6
2.3
Min
1.7
2.0
Max
HIGH Level Input Voltage
V
V
VIL
LOW Level Input Voltage
HIGH Level Output Voltage
0.7
0.8
VOH
I
OH = −100 µA
IOH = -8 mA
OH = −12 mA
OH = −18 mA
OH = −24 mA
OL = 100 µA
IOL = 8mA
OL = 12 mA
OL = 16 mA
OL = 24 mA
0 ≤ VI ≤ 5.5V
V
CC − 0.2
1.8
I
2.7
2.2
V
V
I
3.0
2.4
I
3.0
2.2
VOL
LOW Level Output Voltage
I
2.3 to 3.6
2.3
0.2
0.6
I
2.7
0.4
I
3.0
0.4
I
3.0
0.55
±5.0
10.0
10.0
±10.0
500
II
Input Leakage Current
2.3 to 3.6
0.0
µA
µA
IOFF
ICC
Power-Off Leakage Current
Quiescent Supply Current
VI or VO = 5.5V
VI = VCC or GND
3.6V ≤ VI ≤ 5.5V
2.3 to 3.6
2.3 to 3.6
2.3 to 3.6
µA
µA
∆ICC
Increase in ICC per Input
VIH = VCC −0.6V
www.fairchildsemi.com
4
AC Electrical Characteristics
T
A = −40°C to +85°C, RL = 500Ω
CC = 2.7V
L = 50pF
Max Min
V
CC = 3.3V ± 0.3V
L = 50pF
Max
V
VCC = 2.5V ± 0.2V
L = 30pF
Max
Symbol
Parameter
Units
C
C
C
Min
Min
tPHL
tPLH
tPHL
tPLH
tPHL
Propagation Delay
1.5
1.5
1.5
1.5
1.5
1.5
6.0
6.0
6.5
6.5
6.0
6.0
1.0
1.0
1.5
1.5
1.5
1.5
1.5
1.5
7.0
7.0
7.5
7.5
7.0
7.0
1.5
1.5
1.5
1.5
1.5
1.5
7.2
7.2
8.4
8.4
7.2
7.2
ns
ns
ns
ns
An to Qn
Propagation Delay
E3 to Qn
Propagation Delay
E1 or E2 to Qn
tPLH
tOSHL
tOSLH
Output to Output Skew (Note 6)
Note 6: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
VCC
TA = 25°C
Symbol
VOLP
Parameter
Conditions
Units
(V)
3.3
2.5
3.3
2.5
Typical
0.8
Quiet Output Dynamic Peak VOL
C
C
C
C
L = 50 pF, VIH = 3.3V, VIL = 0V
L = 30 pF, VIH = 2.5V, VIL = 0V
L = 50 pF, VIH = 3.3V, VIL = 0V
L = 30 pF, VIH = 2.5V, VIL = 0V
V
V
0.6
VOLV
Quiet Output Dynamic Valley VOL
−0.8
−0.6
Capacitance
Symbol
Parameter
Conditions
CC = Open, VI = 0V or VCC
Typical
7.0
Units
pF
CIN
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
V
V
V
COUT
CPD
CC = 3.3V, VI = 0V or VCC
8.0
pF
CC = 3.3V, VI = 0V or VCC, f = 10 MHz
25.0
pF
5
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AC Loading and Waveforms Generic for LCX Family
FIGURE 1. AC Test Circuit
(CL includes probe and jig capacitance)
Test
Switch
Open
tPLH, tPHL
tPZL, tPLZ
6V at VCC = 3.3V ± 0.3V
VCC x 2 at VCC = 2.5V ± 0.2V
GND
tPZH, tPHZ
3-STATE Output Low Enable and
Disable Times for Logic
Waveform for Inverting and Non-Inverting Functions
Setup Time, Hold TIme and Recovery TIme for Logic
Propagation Delay, Pulse Width and trec Waveforms
3-STATE Output High Enable and
Disable Times for Logic
trise and tfall
VCC
Symbol
3.3V ± 0.3V
2.7V
1.5V
2.5V ± 0.2V
VCC/2
Vmi
Vmo
Vx
1.5V
1.5V
1.5V
VCC/2
VOL + 0.3V
V
OL + 0.3V
V
OL + 0.15V
Vy
V
OH − 0.3V
V
OH − 0.3V
VOH − 0.15V
FIGURE 2. Waveforms
(Input Pulse Characteristics; f = 1MHz, tr = tf = 3ns)
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6
Schematic Diagram Generic for LCX Family
7
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Tape and Reel Specification
Tape Format for DQFN
Package
Tape
Section
Number
Cavities
125 (typ)
3000
Cavity
Status
Empty
Filled
Cover Tape
Status
Designator
Leader (Start End)
Carrier
Sealed
BQX
Sealed
Trailer (Hub End)
75 (typ)
Empty
Sealed
TAPE DIMENSIONS inches (millimeters)
REEL DIMENSIONS inches (millimeters)
Tape Size
A
B
C
D
N
W1
W2
13.0
0.059
(1.50)
0.512
(13.00)
0.795
(20.20)
2.165
0.488
(12.4)
0.724
(18.4)
12 mm
(330.0)
(55.00)
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8
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M16A
9
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
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10
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 3.5mm
Package Number MLP016E
11
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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:
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 rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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www.fairchildsemi.com
12
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are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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