SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Wide Operating Voltage Range of 2 V to 6 V
D
High-Current Outputs Drive Up To
15 LSTTL Loads
D
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
D
Low Power Consumption, 80-µA Max ICC
D
Typical tpd = 11 ns
D
±6-mA Output Drive at 5 V
D
Low Input Current of 1 µA Max
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54HC244 ...J OR W PACKAGE
SN74HC244 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
SN54HC244 . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
1Y4
2A2 2OE
2Y1
GND
2A1 VCC
description/ordering information
These octal buffers and line drivers are designed specifically to improve both the performance and density of
3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The ’HC244
devices are 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.
ORDERING INFORMATION
TAPACKAGE†ORDERABLE
PART NUMBER TOP-SIDE
MARKING
–40 C to 85 C
PDIP – N T ube of 20 SN74HC244N SN74HC244N
–40 C to 85 C
SOIC – DW
T ube of 25 SN74HC244DW
HC244
–40 C to 85 C
SOIC – DW
Reel of 2000 SN74HC244DWR
HC244
–40
°
C to 85
°
C
SOP – NS Reel of 2000 SN74HC244NSR HC244
–40°C to 85°C
SSOP – DB Reel of 2000 SN74HC244DBR HC244
TSSOP – PW
T ube of 70 SN74HC244PW
HC244
TSSOP – PW
Reel of 2000 SN74HC244PWR
HC244
Reel of 250 SN74HC244PWT
–55 C to 125 C
CDIP – J T ube of 20 SNJ54HC244J SNJ54HC244J
–55
°
C to 125
°
C
CFP – W T ube of 85 SNJ54HC244W SNJ54HC244W
LCCC – FK T ube of 55 SNJ54HC244FK SNJ54HC244FK
†Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright 2003, Texas Instruments Incorporated
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
(each buffer/driver)
INPUTS
OUTPUT
OE A
OUTPUT
Y
L H H
LLL
H X Z
logic diagram (positive logic)
1
2
4
6
8
19
11
13
15
17 3
5
7
9
12
14
16
18 1Y1 2Y1
1Y2
1Y3
1Y4
2Y2
2Y3
2Y4
2OE
1OE
2A1
2A2
2A3
2A4
1A1
1A2
1A3
1A4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
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): DB package 70°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package 58°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 69°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package 60°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 af fect 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.
SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54HC244 SN74HC244
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 2 5 6 2 5 6 V
V
High-level input voltage
VCC = 2 V 1.5 1.5
V
VIH
High-level input voltage
VCC = 4.5 V 3.15 3.15
V
IH
VCC = 6 V 4.2 4.2
V
Low-level input voltage
VCC = 2 V 0.5 0.5
V
VIL
Low-level input voltage
VCC = 4.5 V 1.35 1.35
V
IL
VCC = 6 V 1.8 1.8
VIInput voltage 0 VCC 0 VCC V
VOOutput voltage 0 VCC 0 VCC V
t/ v
Input transition rise/fall time
VCC = 2 V 1000 1000
ns
∆
t/
∆
v
Input transition rise/fall time
VCC = 4.5 V 500 500
ns
VCC = 6 V 400 400
TAOperating free-air temperature –55 125 –40 85 °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.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C SN54HC244 SN74HC244
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN TYP MAX MIN MAX MIN MAX
UNIT
V
I = –20 A
2 V 1.9 1.998 1.9 1.9
V
V
IOH = –20
µ
A
4.5 V 4.4 4.499 4.4 4.4
V
VOH
OH
6 V 5.9 5.999 5.9 5.9
V
OH
IOH = –6 mA 4.5 V 3.98 4.3 3.7 3.84
IOH = –7.8 mA 6 V 5.48 5.8 5.2 5.34
V
I = 20 A
2 V 0.002 0.1 0.1 0.1
V
V
IOL = 20
µ
A
4.5 V 0.001 0.1 0.1 0.1
V
VOL
OL
6 V 0.001 0.1 0.1 0.1
V
OL
IOL = 6 mA 4.5 V 0.17 0.26 0.4 0.33
IOL = 7.8 mA 6 V 0.15 0.26 0.4 0.33
IIVI = VCC or 0 6 V ±0.1 ±100 ±1000 ±1000 nA
IOZ VO = VCC or 0, VI = VIH or VIL 6 V ±0.01 ±0.5 ±10 ±5µA
ICC VI = VCC or 0, IO = 0 6 V 8 160 80 µA
Ci2 V to 6 V 3 10 10 10 pF
SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C SN54HC244 SN74HC244
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
A
Y
2 V 40 115 170 145
ns
tpd
A
Y
4.5 V 13 23 34 29
ns
pd
6 V 11 20 29 25
t
OE
Y
2 V 75 150 225 190
ns
ten
OE
Y
4.5 V 15 30 45 38
ns
en
6 V 13 26 38 32
t
OE
Y
2 V 75 150 225 190
ns
tdis
OE
Y
4.5 V 15 30 45 38
ns
dis
6 V 13 26 38 32
t
Y
2 V 28 60 90 75
ns
tt
Y
4.5 V 8 12 18 15
ns
t
6 V 6 10 15 13
switching characteristics over recommended operating free-air temperature range, CL = 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C SN54HC244 SN74HC244
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
A
Y
2 V 56 165 245 210
ns
tpd
A
Y
4.5 V 18 33 49 42
ns
pd
6 V 15 28 42 35
t
OE
Y
2 V 100 200 300 250
ns
ten
OE
Y
4.5 V 20 40 60 50
ns
en
6 V 17 34 51 43
t
Y
2 V 45 210 315 265
ns
tt
Y
4.5 V 17 42 63 53
ns
t
6 V 13 36 53 45
operating characteristics, TA = 25°C
PARAMETER TEST CONDITIONS TYP UNIT
Cpd Power dissipation capacitance per buffer/driver No load 35 pF
SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
50%50% 10%10% 90% 90% VCC
0 V
trtf
Input
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
50%50% 10%10% 90% 90%
VCC
VOH
VOL
0 V
trtf
Input
In-Phase
Output
50%
tPLH tPHL
50% 50%
10% 10% 90%90% VOH
VOL
tr
tf
tPHL tPLH
Out-of-Phase
Output
50%
10%
90%
VCC
≈VCC
VOL
0 V
Output
Control
(Low-Level
Enabling)
Output
W aveform 1
(See Note B)
50%
tPZL tPLZ
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
VOH
≈0 V
50%
50%
tPZH tPHZ
Output
W aveform 2
(See Note B)
≈VCC
Test
Point
From Output
Under Test
CL
(see Note A)
RL
V
CC
S1
S2
LOAD CIRCUIT
PARAMETER CL
tPZH
tpd or tt
tdis
ten tPZL
tPHZ
tPLZ
1 kΩ
1 kΩ
50 pF
or
150 pF
50 pF
Open Closed
RLS1
Closed Open
S2
Open Closed
Closed Open
50 pF
or
150 pF Open Open––
NOTES: A. CL includes probe and test-fixture capacitance.
B. W aveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
W aveform 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
PACKAGING INFORMATION
Orderable Device Status (1) Package
Type Package
Drawing Pins Package
Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
5962-8409601VRA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
5962-8409601VSA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC
84096012A ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC
8409601RA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
8409601SA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC
JM38510/65705B2A ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC
JM38510/65705BRA ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
JM38510/65705BSA ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC
SN54HC244J ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
SN74HC244ADBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI
SN74HC244APWLE OBSOLETE TSSOP PW 20 TBD Call TI Call TI
SN74HC244DBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI
SN74HC244DBR ACTIVE SSOP DB 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DBRE4 ACTIVE SSOP DB 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DW ACTIVE SOIC DW 20 25 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DWE4 ACTIVE SOIC DW 20 25 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DWG4 ACTIVE SOIC DW 20 25 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DWR ACTIVE SOIC DW 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244DWRG4 ACTIVE SOIC DW 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244N ACTIVE PDIP N 20 20 Pb-Free
(RoHS) CU NIPDAU Level-NC-NC-NC
SN74HC244N3 OBSOLETE PDIP N 20 TBD Call TI Call TI
SN74HC244NE4 ACTIVE PDIP N 20 20 Pb-Free
(RoHS) CU NIPDAU Level-NC-NC-NC
SN74HC244NSG4 ACTIVE SO NS 20 40 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244NSR ACTIVE SO NS 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244NSRE4 ACTIVE SO NS 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244NSRG4 ACTIVE SO NS 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244PW ACTIVE TSSOP PW 20 70 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244PWE4 ACTIVE TSSOP PW 20 70 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244PWLE OBSOLETE TSSOP PW 20 TBD Call TI Call TI
SN74HC244PWR ACTIVE TSSOP PW 20 2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
www.ti.com 26-Sep-2005
Addendum-Page 1
Orderable Device Status (1) Package
Type Package
Drawing Pins Package
Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
no Sb/Br)
SN74HC244PWRE4 ACTIVE TSSOP PW 20 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244PWT ACTIVE TSSOP PW 20 250 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74HC244PWTE4 ACTIVE TSSOP PW 20 250 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SNJ54HC244FK ACTIVE LCCC FK 20 1 TBD Call TI Level-NC-NC-NC
SNJ54HC244J ACTIVE CDIP J 20 1 TBD Call TI Level-NC-NC-NC
SNJ54HC244W ACTIVE CFP W 20 1 TBD Call TI Level-NC-NC-NC
(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) 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.
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.
PACKAGE OPTION ADDENDUM
www.ti.com 26-Sep-2005
Addendum-Page 2
MECHANICAL DATA
MLCC006B – OCTOBER 1996
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FK (S-CQCC-N**) LEADLESS CERAMIC CHIP CARRIER
4040140/D 10/96
28 TERMINAL SHOWN
B
0.358
(9,09)
MAX
(11,63)
0.560
(14,22)
0.560
0.458
0.858
(21,8)
1.063
(27,0)
(14,22)
A
NO. OF
MINMAX
0.358
0.660
0.761
0.458
0.342
(8,69)
MIN
(11,23)
(16,26)
0.640
0.739
0.442
(9,09)
(11,63)
(16,76)
0.962
1.165
(23,83)
0.938
(28,99)
1.141
(24,43)
(29,59)
(19,32)(18,78)
**
20
28
52
44
68
84
0.020 (0,51)
TERMINALS
0.080 (2,03)
0.064 (1,63)
(7,80)
0.307
(10,31)
0.406
(12,58)
0.495
(12,58)
0.495
(21,6)
0.850
(26,6)
1.047
0.045 (1,14)
0.045 (1,14)
0.035 (0,89)
0.035 (0,89)
0.010 (0,25)
12
1314151618 17
11
10
8
9
7
5
432
0.020 (0,51)
0.010 (0,25)
6
12826 27
19
21
B SQ
A SQ 22
23
24
25
20
0.055 (1,40)
0.045 (1,14)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a metal lid.
D. The terminals are gold plated.
E. Falls within JEDEC MS-004
MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE
4040065 /E 12/01
28 PINS SHOWN
Gage Plane
8,20
7,40
0,55
0,95
0,25
38
12,90
12,30
28
10,50
24
8,50
Seating Plane
9,907,90
30
10,50
9,90
0,38
5,60
5,00
15
0,22
14
A
28
1
2016
6,50
6,50
14
0,05 MIN
5,905,90
DIM
A MAX
A MIN
PINS **
2,00 MAX
6,90
7,50
0,65 M
0,15
0°–ā8°
0,10
0,09
0,25
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-150
MECHANICAL DATA
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,65 M
0,10
0,10
0,25
0,50
0,75
0,15 NOM
Gage Plane
28
9,80
9,60
24
7,90
7,70
2016
6,60
6,40
4040064/F 01/97
0,30
6,60
6,20
80,19
4,30
4,50
7
0,15
14
A
1
1,20 MAX
14
5,10
4,90
8
3,10
2,90
A MAX
A MIN
DIM PINS **
0,05
4,90
5,10
Seating Plane
0°–8°
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-153
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’ s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of T I products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products Applications
Amplifiers amplifier.ti.com Audio www.ti.com/audio
Data Converters dataconverter.ti.com Automotive www.ti.com/automotive
DSP dsp.ti.com Broadband www.ti.com/broadband
Interface interface.ti.com Digital Control www.ti.com/digitalcontrol
Logic logic.ti.com Military www.ti.com/military
Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork
Microcontrollers microcontroller.ti.com Security www.ti.com/security
Telephony www.ti.com/telephony
Video & Imaging www.ti.com/video
Wireless www.ti.com/wireless
Mailing Address: Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright 2005, Texas Instruments Incorporated
all searc hes
Enter KeywordEnter Keyword
Enter Part NumberEnter Part Number
C ontac t U s | T I Worldwide: U nited States | my.T I Login
TI Home > Semiconductors > Logic > Buffers, Drivers and Transceivers > Non-Inverting Buffers and Drivers >
View ROHS Compliant Devices
View RoHS Compliant Devices
clear gif
SN74HC244, Status: ACTIVE
Octal Buffers And Line Drivers With 3-State Outputs
clear gif
Features
Samples
Technical Documents
Quality & Pb-Free Data
Pricing/Packaging
Applications Notes
Related Products
Inventory
Simulation Models
Tools & Software
Symbols/Footprints
Reference Designs
Datasheet
Dow nload Datasheet
SN54HC244, SN74HC244 (Rev. D) (sn74hc244.pdf, 534 KB)
13 Aug 2003 Download
SN54HC244
SN74HC244
SN74HC244-EP
Voltage Nodes(V)
6, 5, 2
6, 4.5, 2
6, 4.5, 2
Vcc range(V)
2.0 to 6.0
2.0 to 6.0
2.0 to 6.0
Logic
True
True
True
Input Level
CMOS
CMOS
CMOS
Output Level
CMOS
CMOS
CMOS
Output Drive(mA)
-7.8/7.8
-7.8/7.8
No. of Gates
10
No. of Outputs
8
8
8
tpd max(ns)
29
34
Static Current
0.08
0.16
Samples
Samples
Samples
Inventory
Inventory
Inventory
Product Information
Features
Save this to your personal library
Wide Operating Voltage Range of 2 V to 6 V
High-C urrent Outputs Drive Up To 15 LSTTL Loads
3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
Low Power C onsumption, 80-µA Max ICC
Typical tpd = 11 ns
±6-mA Output Drive at 5 V
Low Input C urrent of 1 µA Max
Description
These octal buffers and line drivers are designed specifically to improve both the performance and
density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
The ’HC 244 devices are 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.
Refine Your Selection
- Logic: Non-Inverting Buffers
and Drivers
Support
- KnowledgeBase
- Contact Technical Support
- TI Cross Reference
- Training
- Part Marking Lookup
- Part Number Nomenclature
Pricing/Packaging/CAD Design Tools/Samples
Price
Packaging
CAD Design Tools
Samples
Device
Status
Temp
(oC)
Budget
Price ($US)
| QTY
Industry
Standard
(TI Pkg) |
Pins
Top Side
Marking
Standard
Pack
Quantity
Footprints
Samples
SN74HC244ADBLE
OBSOLETE
-40 to 85
SSOP (DB) |
20
View
Not
Available
SN74HC244APWLE
OBSOLETE
-40 to 85
TSSOP (PW)
| 20
View
Not
Available
SN74HC244DBLE
OBSOLETE
-40 to 85
SSOP (DB) |
20
View
Not
Available
SN74HC244DBR
ACTIVE
-40 to 85
0.33 | 1KU
SSOP (DB) |
20
View
2000
Contact TI
Distributor
or Sales
Office
SN74HC244DBRE4
ACTIVE
-40 to 85
0.33 | 1KU
SSOP (DB) |
20
View
2000
Request
Free
Samples
SN74HC244DW
ACTIVE
-40 to 85
0.33 | 1KU
SOIC (DW)
| 20
View
25
Purchase
Samples
SN74HC244DWE4
ACTIVE
-40 to 85
0.33 | 1KU
SOIC (DW)
| 20
View
25
Purchase
Samples
SN74HC244DWG4
ACTIVE
-40 to 85
0.37 | 1KU
SOIC (DW)
| 20
View
25
Purchase
Samples
SN74HC244DWR
ACTIVE
-40 to 85
0.33 | 1KU
SOIC (DW)
| 20
View
2000
Contact TI
Distributor
or Sales
Office
SN74HC244DWRE4
ACTIVE
-40 to 85
0.33 | 1KU
SOIC (DW)
| 20
View
2000
Request
Free
Samples
SN74HC244DWRG4
ACTIVE
-40 to 85
0.37 | 1KU
SOIC (DW)
| 20
View
2000
Purchase
Samples
SN74HC244N
ACTIVE
-40 to 85
0.36 | 1KU
PDIP (N) |
20
View
20
Contact TI
Distributor
or Sales
Office
SN74HC244N3
OBSOLETE
-40 to 85
PDIP (N) |
20
View
Not
Available
SN74HC244NE4
ACTIVE
-40 to 85
0.36 | 1KU
PDIP (N) |
20
View
20
Request
Free
Samples
SN74HC244NSG4
ACTIVE
0.37 | 1KU
SO (NS) |
20
View
40
Purchase
Samples
SN74HC244NSR
ACTIVE
-40 to 85
0.33 | 1KU
SO (NS) |
20
View
2000
Contact TI
Distributor
or Sales
Office
SN74HC244NSRE4
ACTIVE
-40 to 85
0.33 | 1KU
SO (NS) |
20
View
2000
Purchase
Samples
SN74HC244NSRG4
ACTIVE
-40 to 85
0.37 | 1KU
SO (NS) |
20
View
2000
Purchase
Samples
SN74HC244PW
ACTIVE
-40 to 85
0.33 | 1KU
TSSOP (PW)
| 20
View
70
Purchase
Samples
SN74HC244PWE4
ACTIVE
-40 to 85
0.33 | 1KU
TSSOP (PW)
| 20
View
70
Purchase
Samples
SN74HC244PWLE
OBSOLETE
-40 to 85
TSSOP (PW)
| 20
View
Not
Available
SN74HC244PWR
ACTIVE
-40 to 85
0.33 | 1KU
TSSOP (PW)
| 20
View
2000
Contact TI
Distributor
or Sales
Office
SN74HC244PWRE4
ACTIVE
-40 to 85
0.33 | 1KU
TSSOP (PW)
| 20
View
2000
Request
Free
Samples
SN74HC244PWT
ACTIVE
-40 to 85
0.66 | 1KU
TSSOP (PW)
| 20
View
250
Purchase
Samples
SN74HC244PWTE4
ACTIVE
-40 to 85
0.66 | 1KU
TSSOP (PW)
| 20
View
250
Purchase
Samples
Inventory
TI Inventory Status
Reported Distributor Inventory
SN74HC244DBR
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
View all Distributors
C hoose a Region
0*
165 | 22
Dec
10
Weeks
Americas
Arrow
>1k
>10k | 29
Dec
Europe
Avnet-
SILICA
680
SN74HC244DBRE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
165 | 22
Dec
10
Weeks
None Reported
View Distributors
>10k | 29
Dec
SN74HC244DW
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 30
Jan
9 Weeks
Americas
Arrow
>1k
Avnet
>1k
Newark
InOne
458
Europe
Arrow
Northern
Europe
>1k
Arrow
Southern
Europe
>1k
Avnet-
SILICA
>1k
EBV
Elektronik
>1k
SN74HC244DWE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 30
Jan
9 Weeks
None Reported
View Distributors
SN74HC244DWG4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 30
Jan
9 Weeks
None Reported
View Distributors
SN74HC244DWR
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 19
Dec
8 Weeks
Americas
Avnet
>1k
DigiKey
>1k
Europe
Abacus
Polar
>1k
Arrow
Northern
Europe
>1k
Avnet-
SILICA
>1k
EBV
Elektronik
>1k
Rutronik
>1k
Spoerle
>1k
SN74HC244DWRE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 19
Dec
8 Weeks
None Reported
View Distributors
SN74HC244DWRG4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 30
Jan
9 Weeks
None Reported
View Distributors
SN74HC244N
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 5
Jan
10
Weeks
Americas
Arrow
>1k
Avnet
>1k
DigiKey
>1k
Newark
InOne
>1k
Europe
Abacus
Polar
>1k
Arrow
Northern
Europe
>1k
Arrow
Southern
Europe
>1k
Avnet-
SILICA
>1k
EBV
Elektronik
>1k
SN74HC244NE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 5
Jan
10
Weeks
None Reported
View Distributors
SN74HC244NSG4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
165 | 19
Dec
8 Weeks
None Reported
View Distributors
>10k | 3
Jan
SN74HC244NSR
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
2000*
165 | 16
Dec
8 Weeks
Americas
DigiKey
>1k
>10k | 30
Dec
SN74HC244NSRE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
165 | 16
Dec
8 Weeks
None Reported
View Distributors
>10k | 30
Dec
SN74HC244NSRG4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
165 | 19
Dec
8 Weeks
None Reported
View Distributors
>10k | 3
Jan
SN74HC244PW
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
630 | 12
Dec
12
Weeks
None Reported
View Distributors
>10k | 3
Apr
SN74HC244PWE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
630 | 12
Dec
12
Weeks
None Reported
View Distributors
>10k | 3
Apr
SN74HC244PWR
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 3
Apr
16
Weeks
Americas
DigiKey
>1k
Europe
Arrow
Southern
Europe
>1k
Rutronik
>1k
SN74HC244PWRE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 3
Apr
16
Weeks
None Reported
View Distributors
SN74HC244PWT
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 3
Apr
16
Weeks
None Reported
View Distributors
SN74HC244PWTE4
As of 9:11 AM GMT, 29 Nov
2005
As of 9:11 AM GMT, 29 Nov 2005
In
Stock
In Progress
QTY | Date
Lead
Time
Region
Company
In
Stock
Purchase
0*
>10k | 3
Apr
16
Weeks
None Reported
View Distributors
* Our information is updated daily, so please check back with us
soon if this does not meet your needs. You may also contact
your TI Authorized Distributor, including those listed above, for
real time stock information.
** Lead time information is not available at this time. However,
our information is updated daily so please check back with us
soon. Please contact your preferred TI Authorized Distributor for
additional information.
Quality & Lead (Pb)-Free Data
Product Content
MTBF/FIT Rate
Device
Eco Plan*
Lead/Ball Finish
MSL Rating/Peak Reflow
Details
Details
SN74HC244DBR
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DBRE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DW
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DWE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DWG4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DWR
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DWRE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244DWRG4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244N
Pb-Free (RoHS)
CU NIPDAU
Level-NC-NC-NC
View
View
SN74HC244NE4
Pb-Free (RoHS)
CU NIPDAU
Level-NC-NC-NC
View
View
SN74HC244NSG4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244NSR
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244NSRE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244NSRG4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244PW
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244PWE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244PWR
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244PWRE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244PWT
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
SN74HC244PWTE4
Green (RoHS & no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
View
View
* The planned eco-friendly classification: Pb-Free (RoHS) or
Green (RoHS & no Sb/Br) - please click on the Product C ontent
Details "View" link in the table above for the latest availability
information and additional product content details.
If the information you are requesting is not available online at
this time, contact one of our Product Information C enters
regarding the availability of this information.
Technical Documents
Datasheets
Keep track of what's new
SN54HC244, SN74HC244 (Rev. D) (sn74hc244.pdf, 534 KB)
13 Aug 2003 Download
Application Notes
Simultaneous-Switching Performance of TI Logic Devices (Rev. B) (szza038b.htm, 9 KB)
23 Feb 2005 Abstract
Semiconductor Packing Material Electrostatic Discharge (ESD) Protection (szza047.htm, 9 KB)
08 Jul 2004 Abstract
Shelf-Life Evaluation of Lead-Free Component F inishes (szza046.htm, 9 KB)
24 May 2004 Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev . B) (szza036b.htm, 8 KB)
28 May 2003 Abstract
TI IBIS F ile Creation, Validation, and Distribution Processes (szza034.htm, 9 KB)
29 Aug 2002 Abstract
Selecting the Right Texas Instruments Signal Switch (szza030.htm, 9 KB)
07 Sep 2001 Abstract
Implications of Slow or F loating CMOS Inputs (Rev. C) (scba004c.htm, 9 KB)
01 Feb 1998 Abstract
CMOS Power Consumption and CPD Calculation (Rev. B) (scaa035b.htm, 9 KB)
01 Jun 1997 Abstract
Designing With Logic (Rev. C) (sdya009c.htm, 9 KB)
01 Jun 1997 Abstract
Live Insertion (sdya012.htm, 9 KB)
01 Oct 1996 Abstract
Input and Output Characteristics of Digital Integrated Circuits (sdya010.htm, 9 KB)
01 Oct 1996 Abstract
SN54/74HCT CMOS Logic Family Applications and Restrictions (scla011.htm, 9 KB)
01 May 1996 Abstract
Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (scla008.htm, 9 KB)
01 Apr 1996 Abstract
View Application Notes for NON-INVERTING BUFFERS AND DRIVERS
User Guides
Signal Switch Data Book (Rev. A) (scdd003a.pdf, 19732 KB)
14 Nov 2003 Download
LOGIC Pocket Data Book (scyd013.pdf, 4835 KB)
05 Dec 2002 Download
Simulation Models
IBIS Model
IBIS Model of SN74HC244 (schm004.ibs, 169 KB)
09 Aug 2004 ibis / zip
More Literature
Logic Selection Guide 2005 (Rev. X) (sdyu001x.pdf, 6909 KB)
15 Mar 2005 Download
Military Semiconductors Selection Guide 2004-2005 (Rev. D) (sgyc003d.pdf, 964 KB)
10 Aug 2004 Download
SN74HC4851/HC4852 Product Clip (Rev . B) (scyb019b.pdf, 501 KB)
11 May 2004 Download
Logic Cross-Reference (Rev. A) (scyb017a.pdf, 2938 KB)
07 Oct 2003 Download
View More Literature for NON-INVERTING BUFFERS AND DRIVERS
Products | Applications | Design Support | Buy | C ontact Us | TI Worldwide | my.TI Login | All Searches | C ompany Info |
Press Releases | RSS | Site Map
© Copyright 1995-2005 Texas Instruments Incorporated. All rights reserved. Trademarks | Privacy Policy | Terms of Use