SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
FEATURES
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
20
3
4
19 2OE
18 1Y1
17 2A4
5
6
16 1Y2
15 2A3
7
8
14 1Y3
13 2A2
12 1Y4
9
10
11
1A2
2Y3
1A3
2Y2
1A4
4
2OE
1
2
SN54LVCH244A . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
VCC
SN74LVCH244A . . . RGY PACKAGE
(TOP VIEW)
3 2 1 20 19
18
5
6
17
7
8
15
14
9 10 11 12 13
16
1Y1
2A4
1Y2
2A3
1Y3
2Y1
GND
2A1
1Y4
2A2
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
•
VCC
SN54LVCH244A . . . J OR W PACKAGE
SN74LVCH244A . . . DB, DBQ, DGV, DW,
NS, OR PW PACKAGE
(TOP VIEW)
•
2A1
•
•
Ioff Supports Partial-Power-Down Mode
Operation
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
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)
1OE
•
•
Operate From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 5.9 ns at 3.3 V
Typical VOLP (Output Ground Bounce)
2 V at VCC = 3.3 V, TA = 25°C
Support Mixed-Mode Signal Operation on All
Ports
(5-V Input/Output Voltage With 3.3-V VCC)
GND
•
•
•
•
DESCRIPTION/ORDERING INFORMATION
The SN54LVCH244A octal buffer/line driver is designed for 2.7-V to 3.6-V VCC operation, and the
SN74LVCH244A octal buffer/line driver is designed for 1.65-V to 3.6-V VCC operation.
These devices are organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low,
these devices pass data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown
resistors with the bus-hold circuitry is not recommended.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
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 © 1995–2007, Texas Instruments Incorporated
SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
ORDERING INFORMATION
PACKAGE (1)
TA
QFN – RGY
SN74LVCH244ARGYR
Tube of 25
SN74LVCH244ADW
Reel of 2000
SN74LVCH244ADWR
SOP – NS
Reel of 2000
SN74LVCH244ANSR
LVCH244A
SSOP – DB
Reel of 2000
SN74LVCH244ADBR
LCH244A
SSOP (QSOP) – DBQ
Reel of 2500
SN74LVCH244ADBQR
LVCH244A
Tube of 70
SN74LVCH244APW
Reel of 2000
SN74LVCH244APWR
Reel of 250
SN74LVCH244APWT
TVSOP – DGV
Reel of 2000
SN74LVCH244ADGVR
LCH244A
CDIP – J
Tube of 20
SNJ54LVCH244AJ
SNJ54LVCH244AJ
CFP – W
Tube of 85
SNJ54LVCH244AW
SNJ54LVCH244AW
LCCC – FK
Tube of 55
SNJ54LVCH244AFK
SNJ54LVCH244AFK
TSSOP – PW
–55°C to 125°C
(1)
TOP-SIDE MARKING
Reel of 1000
SOIC – DW
–40°C to 85°C
ORDERABLE PART NUMBER
LCH244A
LVCH244A
LCH244A
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(EACH BUFFER)
INPUTS
OE
A
OUTPUT
Y
L
H
H
L
L
L
H
X
Z
LOGIC DIAGRAM (POSITIVE LOGIC)
1OE
1A1
1A2
1A3
1A4
2
1
2OE
2
18
4
16
6
14
8
12
1Y1
2A1
1Y2
2A2
1Y3
2A3
1Y4
2A4
19
11
9
13
7
15
5
17
3
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2Y1
2Y2
2Y3
2Y4
SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
VCC
Supply voltage range
–0.5
6.5
V
VI
Input voltage range (2)
–0.5
6.5
V
–0.5
6.5
V
–0.5
VCC + 0.5
state (2)
UNIT
VO
Voltage range applied to any output in the high-impedance or power-off
VO
Voltage range applied to any output in the high or low state (2) (3)
IIK
Input clamp current
VI < 0
–50
mA
IOK
Output clamp current
VO < 0
–50
mA
IO
Continuous output current
±50
mA
±100
mA
Continuous current through VCC or GND
DB
θJA
Package thermal impedance
(1)
(2)
(3)
(4)
(5)
70
DBQ package (4)
68
DGV package (4)
92
DW package (4)
58
package (4)
60
PW package (4)
83
RGY package (5)
37
NS
Tstg
package (4)
Storage temperature range
V
–65
150
°C/W
°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 negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
The value of VCC is provided in the recommended operating conditions table.
The package thermal impedance is calculated in accordance with JESD 51-7.
The package thermal impedance is calculated in accordance with JESD 51-5.
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3
SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
Recommended Operating Conditions (1)
SN54LVCH244A
VCC
Supply voltage
VIH
High-level input voltage
Operating
Data retention only
MIN
MAX
MIN
MAX
2
3.6
1.65
3.6
1.5
1.5
VCC = 2.3 V to 2.7 V
1.7
2
Low-level input voltage
Input voltage
VO
Output voltage
0.7
0.8
High-level output current
0
5.5
0
5.5
High or low state
0
VCC
0
VCC
3-state
0
5.5
0
5.5
∆t/∆v
Input transition rise or fall rate
TA
Operating free-air temperature
(1)
4
Low-level output current
V
V
–4
VCC = 2.3 V
–8
VCC = 2.7 V
–12
–12
VCC = 3 V
–24
–24
VCC = 1.65 V
IOL
V
0.8
VCC = 1.65 V
IOH
V
0.35 × VCC
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V
VI
V
2
VCC = 1.65 V to 1.95 V
VIL
UNIT
0.65 × VCC
VCC = 1.65 V to 1.95 V
VCC = 2.7 V to 3.6 V
SN74LVCH244A
mA
4
VCC = 2.3 V
8
VCC = 2.7 V
12
12
VCC = 3 V
24
24
10
–55
125
–40
mA
10
ns/V
85
°C
All unused control 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.
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SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
2.7 V to 3.6 V
1.2
1.7
2.4
3V
2.2
2.2
0.2
0.2
1.65 V
0.45
IOL = 8 mA
2.3 V
0.7
IOL = 12 mA
2.7 V
0.4
0.4
IOL = 24 mA
3V
0.55
0.55
±5
±5
µA
±10
µA
VI = 0 to 5.5 V
3.6 V
VI or VO = 5.5 V
0
1.65 V
(2)
45
2.3 V
VI = 1.7 V
VI = 0 to 3.6
V
(2)
3V
VI = 2 V
(1)
(2)
(3)
(4)
2.2
2.4
IOL = 4 mA
VI = 0.8 V
∆ICC
2.2
3V
2.7 V to 3.6 V
VI = 0.7 V
ICC
2.7 V
V
1.65 V to 3.6 V
VI = 1.07 V
IOZ
VCC – 0.2
2.3 V
VI = 0.58 V
II(hold)
UNIT
VCC – 0.2
IOH = –8 mA
IOL = 100 µA
Ioff
MIN TYP (1) MAX
1.65 V
IOH = –24 mA
II
SN74LVCH244A
MIN TYP (1) MAX
IOH = –4 mA
IOH = –12 mA
VOL
SN54LVCH244A
1.65 V to 3.6 V
IOH = –100 µA
VOH
VCC
V (3)
VO = 0 to 5.5 V
VI = VCC or GND
3.6 V ≤ VI ≤ 5.5 V (4)
IO = 0
One input at VCC – 0.6 V,
Other inputs at VCC or GND
µA
–45
75
75
–75
–75
3..6 V
±500
±500
3.6 V
±15
±10
10
10
10
10
500
500
3.6 V
2.7 V to 3.6 V
µA
µA
µA
Ci
VI = VCC or GND
3.3 V
4
12
4
pF
Co
VO = VCC or GND
3.3 V
5.5
12
5.5
pF
All typical values are at VCC = 3.3 V, TA = 25°C.
This information was not available at the time of publication.
This is the bus-hold maximum dynamic current required to switch the input from one state to another.
This applies in the disabled state only.
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5
SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
Switching Characteristics
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1)
SN54LVCH244A
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN MAX
MIN
MAX
tpd
A
Y
7.5
1
6.5
ns
ten
OE
Y
9
1
8
ns
tdis
OE
Y
8
1
7
ns
VCC = 2.7 V
VCC = 3.3 V
± 0.3 V
UNIT
Switching Characteristics
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1)
SN74LVCH244A
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 1.8 V
± 0.15 V
MIN
MAX
MIN MAX
MIN
MAX
tpd
A
Y
(1)
(1)
(1)
(1)
6.9
1.5
5.9
ns
ten
OE
Y
(1)
(1)
(1)
(1)
8.6
1
7.6
ns
Y
(1)
(1)
(1)
(1)
6.8
1.5
5.8
ns
MIN MAX
tdis
(1)
OE
VCC = 2.5 V
± 0.2 V
VCC = 2.7 V
VCC = 3.3 V
± 0.3 V
UNIT
This information was not available at the time of publication.
Operating Characteristics
TA = 25°C
TEST
CONDITIONS
PARAMETER
Cpd
(1)
6
Power dissipation capacitance
per buffer/driver
Outputs enabled
Outputs disabled
VCC = 1.8 V
VCC = 2.5 V
VCC = 3.3 V
TYP
TYP
TYP
(1)
(1)
47
(1)
(1)
2
f = 10 MHz
This information was not available at the time of publication.
Submit Documentation Feedback
UNIT
pF
SN54LVCH244A,, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
www.ti.com
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
PARAMETER MEASUREMENT INFORMATION
VLOAD
S1
RL
From Output
Under Test
CL
(see Note A)
Open
GND
RL
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
VLOAD
GND
LOAD CIRCUIT
INPUTS
VCC
1.8 V ± 0.15 V
2.5 V ± 0.2 V
2.7 V
3.3 V ± 0.3 V
VI
tr/tf
VCC
VCC
2.7 V
2.7 V
≤2 ns
≤2 ns
≤2.5 ns
≤2.5 ns
VM
VLOAD
CL
RL
V∆
VCC/2
VCC/2
1.5 V
1.5 V
2 × VCC
2 × VCC
6V
6V
30 pF
30 pF
50 pF
50 pF
1 kΩ
500 Ω
500 Ω
500 Ω
0.15 V
0.15 V
0.3 V
0.3 V
VI
Timing Input
VM
0V
tw
tsu
VI
Input
VM
VM
th
VI
Data Input
VM
VM
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VI
VM
Input
VM
0V
tPLH
VM
VM
VOL
tPHL
VM
VM
0V
Output
Waveform 1
S1 at VLOAD
(see Note B)
tPLH
tPLZ
VLOAD/2
VM
tPZH
VOH
Output
VM
tPZL
tPHL
VOH
Output
VI
Output
Control
VM
VOL
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOL + V∆
VOL
tPHZ
VM
VOH − 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 ≤ 10 MHz, ZO = 50 Ω.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
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7
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
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)
Samples
(4/5)
(6)
5962-9754201Q2A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629754201Q2A
SNJ54LVCH
244AFK
5962-9754201QRA
ACTIVE
CDIP
J
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9754201QR
A
SNJ54LVCH244AJ
5962-9754201QSA
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9754201QS
A
SNJ54LVCH244AW
5962-9754201V2A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629754201V2A
SNV54LVCH
244AFK
5962-9754201VSA
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9754201VS
A
SNV54LVCH244AW
SN74LVCH244ADBQR
ACTIVE
SSOP
DBQ
20
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
LVCH244A
Samples
SN74LVCH244ADBR
ACTIVE
SSOP
DB
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LCH244A
Samples
SN74LVCH244ADGVR
ACTIVE
TVSOP
DGV
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LCH244A
Samples
SN74LVCH244ADW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVCH244A
Samples
SN74LVCH244ADWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVCH244A
Samples
SN74LVCH244ANSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVCH244A
Samples
SN74LVCH244APW
ACTIVE
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LCH244A
Samples
SN74LVCH244APWR
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LCH244A
Samples
SN74LVCH244APWRG4
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LCH244A
Samples
SN74LVCH244APWT
ACTIVE
TSSOP
PW
20
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LCH244A
Samples
Addendum-Page 1
Samples
Samples
Samples
Samples
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
14-Oct-2022
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)
Samples
(4/5)
(6)
SN74LVCH244ARGYR
ACTIVE
VQFN
RGY
20
3000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
LCH244A
SNJ54LVCH244AFK
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629754201Q2A
SNJ54LVCH
244AFK
SNJ54LVCH244AJ
ACTIVE
CDIP
J
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9754201QR
A
SNJ54LVCH244AJ
SNJ54LVCH244AW
ACTIVE
CFP
W
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9754201QS
A
SNJ54LVCH244AW
(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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