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SN54ALS244C Datasheet(PDF) 5 Page - Texas Instruments

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Part No. SN54ALS244C
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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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
VOH
VCC = 4.5 V
IOH = – 12 mA
2.4
V
IOH = – 15 mA
2.4
VOL
VCC =4 5V
IOL = 48 mA
0.55
V
VOL
VCC = 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
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
OE
VCC =5 5V
VI =0 4V
– 0.5
– 0.5
mA
IIL
A
VCC = 5.5 V,
VI = 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
,
R2 = 500
,
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
1
10
1
9
ns
tPZL
OE
Y
2
8
2
7.5
ns
tPHZ
OE
Y
1
6.5
1
6
ns
tPLZ
OE
Y
1
10.5
1
9
ns
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.




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