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SN74AHC244PWE4 데이터시트(PDF) 5 Page - Texas Instruments

부품명 SN74AHC244PWE4
상세설명  SNx4AHC244 Octal Buffers/Drivers With 3-State Outputs
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SN74AHC244PWE4 데이터시트(HTML) 5 Page - Texas Instruments

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SN54AHC244, SN74AHC244
www.ti.com
SCLS226K – OCTOBER 1995 – REVISED JULY 2014
7.4 Thermal Information
SN74AHCT244
THERMAL METRIC(1)
DB
DGV
DW
N
NS
PW
UNIT
20 PINS
20 PINS
20 PINS
20 PINS
20 PINS
20 PINS
RθJA
Junction-to-ambient thermal resistance
99.9
119.2
83.0
54.9
80.4
105.4
RθJC(top)
Junction-to-case (top) thermal resistance
61.7
34.5
48.9
41.7
46.9
39.5
RθJB
Junction-to-board thermal resistance
55.2
60.7
50.5
35.8
47.9
56.4
°C/W
ψJT
Junction-to-top characterization parameter
22.6
1.2
21.1
27.9
19.9
3.1
ψJB
Junction-to-board characterization parameter
54.8
60.0
50.1
35.7
47.5
55.8
RθJC(bot)
Junction-to-case (bottom) thermal resistance
n/a
n/a
n/a
n/a
n/a
n/a
(1)
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
7.5 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
TA = 25°C
SN54AHC244
SN74AHC244
PARAMETER
TEST CONDITIONS
VCC
UNIT
MIN
TYP
MAX
MIN
MAX
MIN
MAX
2 V
1.9
2
1.9
1.9
IOH = –50 µA
3 V
2.9
3
2.9
2.9
VOH
4.5 V
4.4
4.5
4.4
4.4
V
IOH = –4 mA
3 V
2.58
2.48
2.48
IOH = –8 mA
4.5 V
3.94
3.8
3.8
2 V
0.1
0.1
0.1
IOL = 50 µA
3 V
0.1
0.1
0.1
VOL
4.5 V
0.1
0.1
0.1
V
IOL = 4 mA
3 V
0.36
0.5
0.44
IOL = 8 mA
4.5 V
0.36
0.5
0.44
0 V to 5.5
II
VI = 5.5 V or GND
±0.1
±1(1)
±1
µA
V
VO = VCC or GND,
IOZ
5.5 V
±0.25
±2.5
±2.5
µA
VI (OE) = VIL or VIH
ICC
VI = VCC or GND,
IO = 0
5.5 V
4
40
40
µA
Ci
VI = VCC or GND
5 V
2
10
10
pF
Co
VO = VCC or GND
5 V
3.5
pF
(1)
On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
Copyright © 1995–2014, Texas Instruments Incorporated
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