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SN54ALS244B Datasheet(PDF) 2 Page - Texas Instruments

Part No. SN54ALS244B
Description  OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS244B, SN74ALS244B
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
2
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
SN74ALS244B
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
0.8
VIL
Low-level input voltage
0.8†
V
IL
g
0.7‡
IOH
High-level output current
–12
–15
mA
I
Low level output current
12
24
mA
IOL
Low-level output current
48§
mA
TA
Operating free-air temperature
–55
125
0
70
°C
† 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 VCC is maintained between 4.75 V and 5.25 V. The 48-mA limit applies for the SN74ALS244B-1 only.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS244B
SN74ALS244B
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 = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
VCC –2
V
VCC = 4.5 V to 5.5 V,
IOH = – 3 mA
2.4
3.2
2.4
3.2
V
VOH
VCC = 4.5 V,
IOH = – 12 mA
2
V
VCC = 4.5 V,
IOH = – 15 mA
2
VCC = 4.5 V,
IOL = 12 mA
0.25
0.4
0.25
0.4
VOL
VCC = 4.75 V,
IOL = 24 mA
V
OL
(IOL = 48 mA for –1 version)
IOZH
VCC = 5.5 V,
VO = 2.7 V
20
20
µA
IOZL
VCC = 5.5 V,
VO = 0.4 V
–20
–20
µA
II
VCC = 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
–30
–112
–30
–112
mA
Outputs high
9
15
9
15
ICC
VCC = 5.5 V
Outputs low
15
24
15
24
mA
Outputs disabled
17
27
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.




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