SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
D Qualified for Automotive Applications
D ESD Protection Exceeds 2000 V Per
D
D
D
D
D Typical tpd = 11 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Wide Operating Voltage Range of 2 V to 6 V
High-Current Outputs Drive Up To 15
LSTTL Loads
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
Low Power Consumption, 80-µA Max ICC
DW OR PW PACKAGE
(TOP VIEW)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
description/ordering information
This octal buffer and line driver is designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and transmitters.
The SN74HC244 is organized as two 4-bit
buffers/drivers with separate output-enable (OE)
inputs. When OE is low, the device passes
noninverted data from the A inputs to the Y outputs.
When OE is high, the outputs are in the
high-impedance state.
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
ORDERING INFORMATION{
TA
−40°C to 125°C
ORDERABLE
PART NUMBER
PACKAGE‡
TOP-SIDE
MARKING
SOIC − DW
Reel of 2000
SN74HC244QDWRQ1
HC244Q
TSSOP − PW
Reel of 2000
SN74HC244QPWRQ1
HC244Q
† For the most current package and ordering information, see the Package Option Addendum at the end of this
document, or see the TI web site at http://www.ti.com.
‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
FUNCTION TABLE
(each buffer/driver)
INPUTS
OE
A
OUTPUT
Y
L
H
H
L
L
L
H
X
Z
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.
Copyright 2008, Texas Instruments Incorporated
!" # $%&" !# '%()$!" *!"&+
*%$"# $ " #'&$$!"# '& ",& "&# &-!# #"%&"#
#"!*!* .!!"/+ *%$" '$&##0 *&# " &$&##!)/ $)%*&
"&#"0 !)) '!!&"&#+
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•
1
SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
logic diagram (positive logic)
1OE
1A1
1A2
1A3
1A4
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
2Y1
2Y2
2Y3
2Y4
absolute maximum ratings over operating free-air temperature range†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
VCC
VIH
Supply voltage
VCC = 2 V
VCC = 4.5 V
High-level input voltage
VCC = 6 V
VCC = 2 V
VIL
VI
VO
tt
MIN
NOM
MAX
2
5
6
3.15
0.5
1.35
0
0
VCC = 6 V
V
1.8
Output voltage
Input transition (rise and fall) time
V
4.2
Input voltage
VCC = 2 V
VCC = 4.5 V
V
1.5
VCC = 4.5 V
VCC = 6 V
Low-level input voltage
UNIT
VCC
VCC
V
V
1000
500
ns
400
TA
Operating free-air temperature
−40
125
°C
NOTE 3: 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.
2
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•
SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = −20 µA
VOH
VI = VIH or VIL
IOH = −6 mA
IOH = −7.8 mA
IOL = 20 µA
VOL
VI = VIH or VIL
IOL = 6 mA
IOL = 7.8 mA
II
IOZ
VI = VCC or 0
VO = VCC or 0,
ICC
Ci
VI = VCC or 0,
VI = VIH or VIL
IO = 0
VCC
MIN
TA = 25°C
TYP
MAX
MIN
2V
1.9
1.998
1.9
4.5 V
4.4
4.499
4.4
6V
5.9
5.999
5.9
4.5 V
3.98
4.3
3.7
6V
5.48
5.8
MAX
UNIT
V
5.2
2V
0.002
0.1
0.1
4.5 V
0.001
0.1
0.1
6V
0.001
0.1
0.1
4.5 V
0.17
0.26
0.4
6V
0.15
0.26
0.4
6V
±0.1
±100
±1000
nA
6V
±0.01
±0.5
±10
µA
8
160
µA
10
10
pF
6V
2 V to 6 V
3
V
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
tpd
FROM
(INPUT)
A
ten
OE
tdis
VCC
2V
40
115
170
Y
4.5 V
13
23
34
6V
11
20
29
Y
OE
Y
tt
TA = 25°C
MIN
TYP
MAX
TO
(OUTPUT)
Y
MIN
MAX
2V
75
150
225
4.5 V
15
30
45
6V
13
26
38
2V
75
150
225
4.5 V
15
30
45
6V
13
26
38
2V
28
60
90
4.5 V
8
12
18
6V
6
10
15
UNIT
ns
ns
ns
ns
operating characteristics, TA = 25°C
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance per buffer/driver
No load
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•
TYP
35
UNIT
pF
3
SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008
PARAMETER MEASUREMENT INFORMATION
VCC
PARAMETER
Test
Point
From Output
Under Test
S1
tPZH
ten
RL
CL
(see Note A)
1 kΩ
CL
tPHZ
1 kΩ
50 pF
tPLZ
tpd or tt
−−
S1
S2
Open
Closed
Closed
Open
Open
Closed
Closed
Open
Open
Open
50 pF
tPZL
tdis
S2
RL
50 pF
LOAD CIRCUIT
VCC
Input
50%
50%
0V
tPLH
In-Phase
Output
50%
10%
tPHL
90%
VOH
50%
10% V
OL
tf
90%
tr
tPHL
Out-of-Phase
Output
90%
tPLH
50%
10%
50%
10%
90%
VOH
VOL
tf
tr
Output
Control
(Low-Level
Enabling)
VCC
50%
0V
tPZL
Output
Waveform 1
(See Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
tPLZ
≈VCC
≈ VCC
50%
10%
VOL
tPZH
Input
50%
10%
90%
90%
tr
VCC
Output
Waveform 2
(See Note B)
50%
10% 0 V
50%
90%
VOH
≈0 V
tPHZ
tf
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
NOTES: A. CL includes probe and test-fixture 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. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 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. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
4
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•
PACKAGE OPTION ADDENDUM
www.ti.com
22-Jul-2011
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
SN74HC244QDWRQ1
ACTIVE
SOIC
DW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN74HC244QPWRG4Q1
ACTIVE
TSSOP
PW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN74HC244QPWRQ1
ACTIVE
TSSOP
PW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
(3)
Samples
(Requires Login)
(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)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF SN74HC244-Q1 :
• Catalog: SN74HC244
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
22-Jul-2011
• Enhanced Product: SN74HC244-EP
• Military: SN54HC244
NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
• Enhanced Product - Supports Defense, Aerospace and Medical Applications
• Military - QML certified for Military and Defense Applications
Addendum-Page 2
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