SN54ALS244BJ [TI]
ALS SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, CDIP20, 0.300 INCH, CERAMIC, DIP-20;
| 型号： | SN54ALS244BJ |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | ALS SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, CDIP20, 0.300 INCH, CERAMIC, DIP-20 驱动器 输出元件 |
| 文件： | 总6页 (文件大小：69K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54ALS244B, SN54AS244, SN74ALS244B, SN74AS244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
SN54ALS244B, SN54AS244 . . . J PACKAGE
SN74ALS244B, SN74AS244 . . . DW OR N PACKAGE
(TOP VIEW)
• 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
• PNP inputs Reduce DC Loading
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
2G
• Package Options include Plastic Small
Outline Packages, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1Y1
A24
1Y2
2A3
1Y3
2A2
1Y4
2A1
• Dependable Texas instruments Quality and
Reliability
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 transmit-
ters. Taken together with the ’ALS240A,
’ALS241A, ’AS240, and ’AS241, these devices
provide the choice of selected combinations of
inverting outputs, symmetrical G (active-low input
control) inputs, and complementary G and G
inputs.
SN54ALS244B, SN54AS244 . . . FK PACKAGE
(TOP VIEW)
3
2
1
20 19
18
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
4
5
6
7
8
17
16
15
14
The –1 version of the SN74ALS244B is identical
to the standard version except that the
9 10 11 12 13
recommended maximum I
is increased to
OL
48 mA. There is no –1 version of the
SN54ALS244B.
The SN54ALS244B and SN54AS244 are characterized for operation over the full military temperature range
of –55°C to 125°C. The SN74ALS244B and SN74AS244 are characterized for operation from 0°C to 70°C.
†
logic symbol
1
1
2
1G
EN
1G
2
4
6
8
18
16
14
12
18
16
14
12
1A1
1Y1
1Y2
1Y3
1Y4
1A1
1A2
1A3
1A4
1Y1
1Y2
1Y3
1Y4
4
6
8
1A2
1A3
1A4
19
2G
EN
19
11
11
13
15
17
9
7
5
3
2G
2A1
2A2
2A3
2A4
2Y1
2Y2
2Y3
2Y4
9
7
5
3
1Y1
1Y2
1Y3
1Y4
2A1
13
15
17
2A2
2A3
2A4
† This is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers are for DW, J, and N packages.
Copyright 1987, Texas Instruments Incorporated
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS244B, SN74ALS244B
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range: SN54ALS244B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
SN74ALS244B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
recommended operating conditions
SN54ALS244B
MIN NOM MAX
5.5
SN74ALS244B
MIN NOM MAX
UNIT
V
V
Supply voltage
4.5
2
5
4.5
2
5
5.5
V
V
CC
High-level input voltage
IH
0.8
†
‡
0.8
V
IL
Low-level input voltage
V
0.7
I
I
High-level output current
Low-level output current
Operating free-air temperature
–12
–15
24
mA
mA
°C
OH
12
0
OL
§
48
T
–55
125
70
A
†
‡
§
Tested at –55°C to 70°C.
Tested at 70°C to 125°C, per MIL-STD-883, method 5005, sub-group 1, 2, and 3. Static tests are performed at 25°C, 125°C, and 55°C.
The extended limits apply only if V is maintained between 4.75 V and 5.25 V. The 48-mA limit applies for the SN74ALS244B-1 only.
CC
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54ALS244B
SN74ALS244B
PARAMETER
TEST CONDITIONS
UNIT
¶
¶
MIN TYP
MAX
MIN TYP
MAX
V
V
CC
V
CC
V
CC
V
CC
= 4.5 V,
I = –18 mA
–1.5
–1.5
V
IK
I
= 4.5 V to 5.5 V,
= 4.5 V to 5.5 V,
= 4.5 V,
I
I
I
= –0.4 mA
= –3 mA
V
CC
–2
2.4
2
V –2
CC
OH
OH
OH
3.2
2.4
3.2
V
OH
V
= –12 mA
V
V
V
= 4.5 V,
I
I
I
= –15 mA
= 12 mA
= 24 mA
2
CC
CC
CC
OL
OH
OL
OL
= 4.5 V,
0.25
0.4
0.25
0.4
= 4.75 V,
= 48 mA for –1 version)
= 5.5 V,
V
V
OL
(I
I
I
I
I
I
I
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
V
= 2.7 V
= 0.4 V
20
–20
0.1
20
–20
0.1
µA
µA
OZH
OZL
I
O
= 5.5 V,
O
= 5.5 V,
V = 7 V
mA
µA
I
= 5.5 V,
V = 2.7 V
20
20
IH
I
= 5.5 V,
V = 0.4 V
–0.1
–112
15
–0.1
–112
15
mA
mA
IL
I
#
= 5.5 V,
V
= 2.25 V
–30
–30
O
O
Outputs high
Outputs low
9
15
17
9
15
17
I
V
CC
= 5.5 V
24
24
mA
CC
Outputs disabled
27
27
¶
#
All typical values are at V
= 5 V, T = 25°C.
A
CC
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ALS244B, 2N74ALS244B
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
switching characteristics (see Note 1)
V
C
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
R1 = 500 Ω,
R2 = 500 Ω,
T
A
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
†
= MIN to MAX
SN54AS244
SN74AS244
MIN
1
MAX
16
MIN
3
MAX
10
t
t
PLH
PHL
PZH
A
Y
Y
Y
ns
ns
ns
3
12
3
10
t
1
26
3
20
G
G
t
1
24
3
20
PZL
t
2
10
3
10
PHZ
t
1
26
3
13
PLZ
†
For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 1: Load circuit and voltage waveforms are shown in Section 1 of the ALS/AS Logic Data Book, 1986.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54AS244, SN74AS244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range: SN54AS244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
SN74AS244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
recommended operating conditions
SN54AS244
MIN NOM
SN74AS244
MIN NOM
UNIT
MAX
MAX
V
V
V
Supply Voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.8
–12
48
0.8
–15
64
V
IL
I
I
mA
mA
°C
OH
OL
T
A
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54AS244
SN74AS244
PARAMETER
TEST CONDITIONS
I = –18 mA
UNIT
†
†
MIN TYP
MAX
MIN TYP
MAX
V
V
CC
V
CC
V
CC
V
CC
= 4.5 V,
–1.2
–1.2
V
IK
I
= 4.5 V to 5.5 V,
= 4.5 V,
I
I
I
= –2 mA
= –3 mA
= –12 mA
V
CC
–2
2.4
2.4
V –2
CC
OH
OH
OH
3.4
2.4
3.4
V
V
OH
= 4.5 V,
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V,
= 4.5 V,
= 4.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
= 5.5 V,
I
I
I
= –15 mA
= 48 mA
= 64 mA
= 2.7 V
2.4
OH
OL
OL
0.55
V
V
OL
0.55
50
I
I
I
I
V
V
50
–50
0.1
µA
µA
mA
µA
OZH
OZL
I
O
= 0.4 V
–50
0.1
20
O
V = 7 V
I
V = 2.7 V
20
IH
I
–0.5
–1
–0.5
–1
G
I
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
mA
mA
IL
CC
CC
I
A
‡
I
O
V
V
O
= 2.25 V
–50
–150
34
50
–150
34
Outputs high
Outputs low
22
60
34
22
60
34
I
V
CC
= 5.5 V
90
90
mA
CC
Outputs disabled
54
54
¶
#
All typical values are at V
= 5 V, T = 25°C.
A
CC
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54AS244, SN74AS244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
switching characteristics (see Note 1)
V
C
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
R1 = 500 Ω,
R2 = 500 Ω,
T
A
FROM
TO
(OUTPUT)
PARAMETER
(INPUT)
UNIT
†
= MIN to MAX
SN54AS244
SN74AS244
MIN
2
MAX
9
MIN
2
MAX
6.2
6.2
9
t
t
PLH
PHL
PZH
A
Y
Y
Y
ns
ns
ns
2
7
2
t
2
10
8
2
G
G
t
2
2
7.5
6
PZL
t
2
6.5
10.5
2
PHZ
t
2
2
9
PLZ
†
For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 1: Load circuit and voltage waveforms are shown in Section 1 of the ALS/AS Logic Data Book, 1986.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
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Copyright 1999, Texas Instruments Incorporated
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