SN74LV138AT
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
www.ti.com
SCLS691 – AUGUST 2005
FEATURES
•
•
Ioff Supports Partial-Power Down Mode
Operation
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D, DB, DGV, NS, OR PW PACKAGE
(TOP VIEW)
A
B
C
G2A
G2B
G1
Y7
GND
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
RGY PACKAGE
(TOP VIEW)
VCC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
B
C
G2A
G2B
G1
Y7
VCC
•
•
1
16
2
15
3
4
14
13
Y0
Y1
Y2
12 Y3
11 Y4
10 Y5
5
6
7
GND
8
9
Y6
•
Inputs Are TTL-Voltage Compatible
4.5-V to 5.5-V VCC Operation
Max tpd of 7.6 ns at 5 V
Typical VOLP (Output Ground Bounce)
2.3 V at VCC = 5 V, TA = 25°C
Support Mixed-Mode Voltage Operation on All
Ports
A
•
•
•
•
DESCRIPTION/ORDERING INFORMATION
The SN74LV138AT is a 3-line to 8-line decoder/demultiplexer, designed for high-performance memory-decoding
or data-routing applications requiring very short propagation delay times. In high-performance memory systems,
this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories
utilizing a fast enable circuit, the delay times of the decoder and the enable time of the memory usually are less
than the typical access time of the memory. This means that the effective system delay introduced by the
decoder is negligible.
ORDERING INFORMATION
PACKAGE (1)
TA
QFN – RGY
Tube of 40
SN74LV138ATD
Reel fo 2500
SN74LV138ATDR
SOP – NS
Reel of 2000
SN74LV138ATNSR
74LV138AT
SSOP – DB
Reel of 2000
SN74LV138ATDBR
LV138AT
TVSOP – DGV
Reel of 2000
SN74LV138ATDGVR
LV138AT
Tube of 90
SN74LV138ATPW
Reel of 2000
SN74LV138ATPWR
Reel of 250
SN74LV138ATPWT
TSSOP – PW
(1)
TOP-SIDE MARKING
SN74LV138ATRGYR
SOIC – D
–40°C to 125°C
ORDERABLE PART NUMBER
Reel of 1000
VV138AT
LV138AT
LV138AT
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated
SN74LV138AT
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
www.ti.com
SCLS691 – AUGUST 2005
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
The conditions at the binary-select inputs (A, B, C) and the three enable inputs (G1, G2A, G2B) select one of
eight output lines. The two active-low (G2A, G2B) and one active-high (G1) enable inputs reduce the need for
external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters
and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing
applications.
This device is fully specified for partial-power-down application susing Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
FUNCTION TABLE
ENABLE INPUTS
2
SELECT INPUTS
OUTPUTS
G1
G2A
G2B
C
B
A
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
H
X
X
X
H
H
H
H
H
H
H
H
L
X
X
X
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
L
H
H
H
H
H
L
H
H
H
H
H
L
L
H
L
L
H
H
H
H
L
H
H
H
H
L
L
H
L
H
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
H
H
H
H
H
H
H
H
H
L
SN74LV138AT
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
www.ti.com
SCLS691 – AUGUST 2005
LOGIC DIAGRAM (POSITIVE LOGIC)
15
A
1
14
Select
Inputs
B
13
3
12
11
10
Enable
Inputs
6
4
G2A
G2B
Y1
2
C
G1
Y0
9
7
Y2
Y3
Data
Outputs
Y4
Y5
Y6
Y7
5
3
SN74LV138AT
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
www.ti.com
SCLS691 – AUGUST 2005
Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
VCC
Supply voltage
–0.5
7
V
VI
Input voltage range (2)
–0.5
7
V
–0.5
VCC + 0.5
range (2) (3)
UNIT
VO
Output voltage
IIK
Input clamp current
VI < 0
–20
mA
IOK
Output clamp current
VO < 0 or VO > VCC
±50
mA
IO
Continuous output current
VO = 0 to VCC
±25
mA
±50
mA
Continuous current through VCC or GND
D package (4)
73
DB package (4)
θJA
Package thermal impedance
(1)
(2)
(3)
(4)
(5)
82
DGV package (4)
120
NS package (4)
64
PW package (4)
108
RGY
Tstg
package (5)
Storage temperature range
V
°C/W
39
–65
150
°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
This value is limited of 5.5 V maximum.
The package thermal impedance is calculated in accordance with JESD 51-7.
The package thermal impedance is calculated in accordance with JESD 51-5.
Recommended Operating Conditions (1)
VCC
Supply voltage
VIH
High-level input voltage
VCC = 4.5 V to 5.5 V
VIL
Low-level input voltage
VCC = 4.5 V to 5.5 V
VI
Input voltage
VO
Output voltage
IOH
High-level output current
IOL
MIN
MAX
4.5
5.5
2
UNIT
V
V
0.8
V
0
5.5
V
0
VCC
V
VCC = 4.5 V to 5.5 V
–12
mA
Low-level output current
VCC = 4.5 V to 5.5 V
12
mA
∆t/∆v
Input transition rise or fall rate
VCC = 4.5 V to 5.5 V
20
ns/V
TA
Operating free-air temperature
125
°C
(1)
4
–40
All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
SN74LV138AT
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
www.ti.com
SCLS691 – AUGUST 2005
Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
VOH
VOL
II
ICC
∆ICC (1)
(1)
TEST CONDITIONS
TA = –40°C
to 85°C
TA = 25°C
VCC
MIN
TYP
4.5
IOH = –50 µA
4.5 V
4.4
IOH = –12 mA
4.5 V
3.8
IOL = 50 µA
4.5 V
IOL = 12 mA
0
MAX
MIN
TA = –40°C
to 125°C
MAX
MIN
4.4
4.4
3.8
3.8
UNIT
MAX
V
0.1
0.1
0.1
4.5 V
0.55
0.55
0.55
0 to 5.5 V
V
±0.1
±1
±1
µA
VI = VCC or GND, IO = 0
5.5 V
2
20
20
µA
One input at 3.4 V,
Other inputs at VCC or GND
5.5 V
1.35
1.5
1.5
mA
VI = 5.5 V or GND
Ioff
VI or VO = 0 to 5.5 V
Ci
VI = VCC or GND
0
4
0.5
5
5
µA
10
10
10
pF
This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V ot VCC.
Switching Characteristics
over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
A, B, or C
tpd
tpd
G1
Y
TA = –40°C
to 125°C
MIN
TYP
MAX
MIN
MAX
MIN
MAX
2.7
7.6
10.4
1
12
1
13
2.5
6.6
9.1
1
10.5
1
12
G2A or G2B
2.8
7
9.6
1
11
1
12
A, B, or C
3.9
8.1
11.4
1
13
1
14
3.7
7.1
10.1
1
11.5
1
12
4
7.5
10.6
1
12
1
13
G1
Y
G2A or G2B
CL = 15 pF
TA = –40°C
to 85°C
TA = 25°C
CL = 50 pF
UNIT
ns
ns
Operating Characteristics
VCC = 5 V, TA = 25°C
PARAMETER
Cpd
Power dissipation capacitance
TEST CONDITIONS
CL = 50 pF,
f = 10 MHz
TYP
79
UNIT
pF
5
SN74LV138AT
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
www.ti.com
SCLS691 – AUGUST 2005
PARAMETER MEASUREMENT INFORMATION
VCC
From Output
Under Test
Test
Point
RL = 1 kΩ
From Output
Under Test
CL
(see Note A)
S1
Open
TEST
GND
CL
(see Note A)
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open Drain
Open
VCC
GND
VCC
LOAD CIRCUIT FOR
3-STATE AND OPEN-DRAIN OUTPUTS
3V
1.5 V
Timing Input
0V
tw
3V
1.5 V
Input
1.5 V
th
tsu
3V
1.5 V
Data Input
1.5 V
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
3V
1.5 V
Input
1.5 V
0V
tPLH
tPHL
VOH
In-Phase
Output
50% VCC
tPHL
Out-of-Phase
Output
50% VCC
VOL
Output
Waveform 1
S1 at VCC
(see Note B)
VOH
50% VCC
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
1.5 V
1.5 V
0V
tPZL
tPLZ
≈VCC
50% VCC
tPZH
tPLH
50% VCC
3V
Output
Control
Output
Waveform 2
S1 at GND
(see Note B)
VOL + 0.3 V
VOL
tPHZ
50% VCC
VOH − 0.3 V
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns.
D. The outputs are measured one at a time, with one input transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPHL and tPLH are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuits and Voltage Waveforms
6
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
SN74LV138ATD
ACTIVE
SOIC
D
16
40
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATDBR
ACTIVE
SSOP
DB
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATDGVR
ACTIVE
TVSOP
DGV
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATDR
ACTIVE
SOIC
D
16
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATPW
ACTIVE
TSSOP
PW
16
90
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATPWR
ACTIVE
TSSOP
PW
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATPWT
ACTIVE
TSSOP
PW
16
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
LV138AT
SN74LV138ATRGYR
ACTIVE
VQFN
RGY
16
3000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
VV138
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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