SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
Copyright 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
•3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
•pnp Inputs Reduce dc Loading
•Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
description
These octal buffers and line drivers are designed
specifically to improve the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. With the ′ALS240A, ′ALS241C,
′AS240A, and ′AS241A, these devices provide the
choice of selected combinations of inverting
outputs, symmetrical active-low output-enable
(OE) inputs, and complementary OE and OE
inputs.
The -1 version of SN74ALS244C is identical to the
standard version, except that the recommended
maximum IOL for the -1 version is 48 mA. There is
no -1 version of the SN54ALS244C.
The SN54ALS244C and SN54AS244A are
characterized for operation over the full military
temperature range of –55°C to 125°C. The
SN74ALS244C and SN74AS244A are
characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each buffer)
INPUTS OUTPUT
OE A Y
L H H
LLL
HXZ
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
SN54ALS244C, SN54AS244A ...J PACKAGE
SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
910111213
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
SN54ALS244C, SN54AS244A . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
1Y4
2A2 2OE
2Y1
GND
2A1 VCC
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.
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol†logic diagram (positive logic)
1
2
4
6
8
19
11
13
15
17 3
5
7
9
12
14
16
18
1A1
1A2
1A3
1A4
1Y1
2A1
2A2
2A3
2A4
2Y1
1Y2
1Y3
1Y4
2Y2
2Y3
2Y4
2OE
1OE
2
1A1 4
1A2 6
1A3 8
1A4
EN
1
1Y1
18
1Y2
16
1Y3
14
1Y4
12
11
2A1 13
2A2 15
2A3 17
2A4
EN
19
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1OE
2OE
†This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54ALS244C –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS244C 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –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.
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
SN54ALS244C SN74ALS244C
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL
Low level in
p
ut voltage
0.8†0.8
V
V
IL
Lo
w-
le
v
el
inp
u
t
v
oltage
0.7‡
V
IOH High-level output current –12 –15 mA
IOL
Low level out
p
ut current
12 24
mA
I
OL
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
48§
mA
TAOperating free-air temperature –55 125 0 70 °C
†Applies over temperature range –55°C to 70°C
‡Applies over temperature range 70°C to 125°C
§Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS244C SN74ALS244C
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP¶MAX MIN TYP¶MAX
UNIT
VIK VCC = 4.5 V, II = –18 mA –1.5 –1.5 V
VCC =45Vto55V
IOH = –0.4 mA VCC –2 VCC –2
VOH
V
CC =
4
.
5
V
to
5
.
5
V
IOH = –3 mA 2.4 3.2 2.4 3.2
V
V
OH
VCC =45V
IOH = –12 mA 2
V
V
CC =
4
.
5
V
IOH = –15 mA 2
IOL = 12 mA 0.25 0.4 0.25 0.4
VOL VCC = 4.5 V IOL = 24 mA 0.35 0.5 V
IOL = 48 mA (-1 version) 0.35 0.5
IOZH VCC = 5.5 V, VO = 2.7 V 20 20 µA
IOZL VCC = 5.5 V, VO = 0.4 V –20 –20 µA
IIVCC = 5.5 V, VI = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL VCC = 5.5 V, VI = 0.4 V –0.1 –0.1 mA
IO#VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA
Outputs high 9 18 9 17
ICC VCC = 5.5 V Outputs low 15 25 15 24 mA
Outputs disabled 17 29 17 27
¶All typical values are at VCC = 5 V, TA = 25°C.
#The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics (see Figure 1)
PARAMETER FROM
(INPUT) TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX†UNIT
SN54ALS244C SN74ALS244C
MIN MAX MIN MAX
tPLH
A
Y
116 2 10
ns
tPHL
A
Y
3 12 3 10
ns
tPZH
OE
Y
126 3 20
ns
tPZL
OE
Y
124 3 20
ns
tPHZ
OE
Y
2 10 2 10
ns
tPLZ
OE
Y
126 1 13
ns
†For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54AS244A –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74AS244A 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –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.
recommended operating conditions
SN54AS244A SN74AS244A
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL Low-level input voltage 0.8 0.8 V
IOH High-level output current –12 –15 mA
IOL Low-level output current 48 64 mA
TAOperating free-air temperature –55 125 0 70 °C
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS244A SN74AS244A
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP†MAX MIN TYP†MAX
UNIT
VIK VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
VCC = 4.5 V to 5.5 V, IOH = –2 mA VCC –2 VCC –2
VOH
IOH = –3 mA 2.4 3.4 2.4 3.4
V
V
OH VCC = 4.5 V IOH = –12 mA 2.4
V
IOH = –15 mA 2.4
VOL
VCC =45V
IOL = 48 mA 0.55
V
V
OL
V
CC =
4
.
5
V
IOL = 64 mA 0.55
V
IOZH VCC = 5.5 V, VO = 2.7 V 50 50 µA
IOZL VCC = 5.5 V, VO = 0.4 V –50 –50 µA
IIVCC = 5.5 V, VI = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL
OE
VCC =55V
VI=04V
–0.5 –0.5
mA
I
IL A
V
CC =
5
.
5
V
,
V
I =
0
.
4
V
–1 –1
mA
IO‡VCC = 5.5 V, VO = 2.25 V –50 –150 –50 –150 mA
Outputs high 22 34 22 34
ICC VCC = 5.5 V Outputs low 60 90 60 90 mA
Outputs disabled 34 54 34 54
†All typical values are at VCC = 5 V, TA = 25°C.
‡The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER FROM
(INPUT) TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX§UNIT
SN54AS244A SN74AS244A
MIN MAX MIN MAX
tPLH
A
Y
2 9 2 6.2
ns
tPHL
A
Y
1 7 1 6.2
ns
tPZH
OE
Y
110 1 9
ns
tPZL
OE
Y
2 8 2 7.5
ns
tPHZ
OE
Y
1 6.5 1 6
ns
tPLZ
OE
Y
110.5 1 9
ns
§For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
tPHZ
tPLZ
tPHL tPLH
0.3 V
tPZL
tPZH
tPLH tPHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
From Output
Under Test Test
Point
R1
S1
CL
(see Note A)
7 V
1.3 V
1.3 V1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
1.3 V 1.3 V 3.5 V
3.5 V
0.3 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATIONS
Input
Out-of-Phase
Output
(see Note C)
1.3 V 1.3 V
1.3 V1.3 V
1.3 V 1.3 V
1.3 V1.3 V
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
VOL
VOH
VOH
VOL
Output
Control
(low-level
enabling)
W aveform 1
S1 Closed
(see Note B)
W aveform 2
S1 Open
(see Note B)
[
0 V
VOH
VOL
[
3.5 V
In-Phase
Output
0.3 V
1.3 V 1.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
R2
VCC
RL
Test
Point
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
From Output
Under Test Test
Point
CL
(see Note A) RL
RL = R1 = R2
NOTES: A. CL includes probe and jig 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. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
PACKAGE OPTION ADDENDUM
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Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
5962-86839012A ACTIVE LCCC FK 20 1 TBD Call TI Call TI
5962-8683901RA ACTIVE CDIP J 20 1 TBD Call TI Call TI
5962-8683901SA ACTIVE CFP W 20 1 TBD Call TI Call TI
5962-8683901VRA ACTIVE CDIP J 20 20 TBD A42 N / A for Pkg Type
5962-8683901VSA ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type
5962-9755901Q2A ACTIVE LCCC FK 20 1 TBD Call TI Call TI
5962-9755901QRA ACTIVE CDIP J 20 1 TBD Call TI Call TI
5962-9755901QSA ACTIVE CFP W 20 1 TBD Call TI Call TI
JM38510/38303B2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type
JM38510/38303BRA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type
M38510/38303B2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type
M38510/38303BRA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type
SN54ALS244CJ ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type
SN54AS244AJ ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type
SN74ALS244C-1DW ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1DWE4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1DWG4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1DWR ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1DWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1DWRG4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1N ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74ALS244C-1NE4 ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74ALS244C-1NSR ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244C-1NSRE4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
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Addendum-Page 2
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
SN74ALS244C-1NSRG4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI
SN74ALS244CDBR ACTIVE SSOP DB 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDBRE4 ACTIVE SSOP DB 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDBRG4 ACTIVE SSOP DB 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDW ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDWE4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDWG4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDWR ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CDWRG4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CN ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74ALS244CNE4 ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74ALS244CNSR ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CNSRE4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74ALS244CNSRG4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ADW ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ADWE4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ADWG4 ACTIVE SOIC DW 20 25 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
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Addendum-Page 3
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
SN74AS244ADWR ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ADWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ADWRG4 ACTIVE SOIC DW 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244AN ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74AS244ANE4 ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74AS244ANSR ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ANSRE4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74AS244ANSRG4 ACTIVE SO NS 20 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SNJ54ALS244CFK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type
SNJ54ALS244CJ ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type
SNJ54ALS244CW ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type
SNJ54AS244AFK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type
SNJ54AS244AJ ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type
SNJ54AS244AW ACTIVE CFP W 20 1 TBD Call TI N / A for Pkg Type
(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)
PACKAGE OPTION ADDENDUM
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Addendum-Page 4
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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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.
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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 SN54ALS244C, SN54ALS244C-SP, SN54AS244A, SN74ALS244C, SN74AS244A :
•Catalog: SN74ALS244C, SN54ALS244C, SN74AS244A
•Military: SN54ALS244C, SN54AS244A
•Space: SN54ALS244C-SP
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Military - QML certified for Military and Defense Applications
•Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74ALS244C-1DWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1
SN74ALS244C-1NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1
SN74ALS244CDBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1
SN74ALS244CDWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1
SN74ALS244CNSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1
SN74AS244ADWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1
SN74AS244ANSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74ALS244C-1DWR SOIC DW 20 2000 367.0 367.0 45.0
SN74ALS244C-1NSR SO NS 20 2000 367.0 367.0 45.0
SN74ALS244CDBR SSOP DB 20 2000 367.0 367.0 38.0
SN74ALS244CDWR SOIC DW 20 2000 367.0 367.0 45.0
SN74ALS244CNSR SO NS 20 2000 367.0 367.0 45.0
SN74AS244ADWR SOIC DW 20 2000 367.0 367.0 45.0
SN74AS244ANSR SO NS 20 2000 367.0 367.0 45.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
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
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