SN54AHC244, SN74AHC244
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS226J – OCTOBER 1995 – REVISED JULY 2003
recommended operating conditions (see Note 3)
SN54AHC244
MIN
VCC
VIH
Supply voltage
High-level input voltage
VCC = 2 V
VCC = 3 V
VCC = 5.5 V
VCC = 2 V
VIL
VI
VO
IOH
Low-level input voltage
Input voltage
Output voltage
High-level output current
VCC = 2 V
VCC = 3.3 V
±
0.3 V
VCC = 5 V
±
0.5 V
VCC = 2 V
IOL
Low-level output current
VCC = 3.3 V
±
0.3 V
VCC = 5 V
±
0.5 V
VCC = 3.3 V
±
0.3 V
VCC = 5 V
±
0.5 V
VCC = 3 V
VCC = 5.5 V
0
0
2
1.5
2.1
3.85
0.5
0.9
1.65
5.5
VCC
–50
–4
–8
50
4
8
100
20
0
0
MAX
5.5
SN74AHC244
MIN
2
1.5
2.1
3.85
0.5
0.9
1.65
5.5
VCC
–50
–4
–8
50
4
8
100
20
V
V
V
V
MAX
5.5
UNIT
V
m
A
mA
m
A
mA
ns/V
∆t/∆v
Input transition rise or fall rate
TA
Operating 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
2V
IOH = –50
m
A
VOH
IOH = –4 mA
IOH = –8 mA
IOL = 50
m
A
VOL
IOL = 4 mA
II
IOZ
ICC
Ci
Co
IOL = 8 mA
VI = 5.5 V or GND
VO = VCC or GND,
VI (OE) = VIL or VIH
VI = VCC or GND,
VI = VCC or GND
IO = 0
3V
4.5 V
3V
4.5 V
2V
3V
4.5 V
3V
4.5 V
0 V to 5.5 V
5.5 V
5.5 V
5V
2
TA = 25°C
MIN
TYP
MAX
1.9
2.9
4.4
2.58
3.94
0.1
0.1
0.1
0.36
0.36
±0.1
±0.25
4
10
2
3
4.5
SN54AHC244
MIN
1.9
2.9
4.4
2.48
3.8
0.1
0.1
0.1
0.5
0.5
±1*
±2.5
40
MAX
SN74AHC244
MIN
1.9
2.9
4.4
2.48
3.8
0.1
0.1
0.1
0.44
0.44
±1
±2.5
40
10
V
V
MAX
UNIT
m
A
m
A
m
A
pF
pF
VO = VCC or GND
5V
3.5
* On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
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