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SN74HCS245 数据表(PDF) 5 Page - Texas Instruments

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部件名 SN74HCS245
功能描述  SN74HCS245 Octal Bus Transcievers with 3-State Outputs and Schmitt-Trigger Inputs
PDF  23 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

SN74HCS245 数据表(HTML) 5 Page - Texas Instruments

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6.5 Electrical Characteristics
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX UNIT
VT+
Positive switching threshold
2 V
0.7
1.5
V
4.5 V
1.7
3.15
6 V
2.1
4.2
VT-
Negative switching threshold
2 V
0.3
1.0
V
4.5 V
0.9
2.2
6 V
1.2
3.0
ΔVT
Hysteresis (VT+ - VT-)(1)
2 V
0.2
1.0
V
4.5 V
0.4
1.4
6 V
0.6
1.6
VOH
High-level output voltage
VI = VIH or VIL
IOH = -20 µA
2 V to 6 V
VCC – 0.1
VCC – 0.002
V
IOH = -6 mA
4.5 V
4.0
4.3
IOH = -7.8 mA
6 V
5.4
5.75
VOL
Low-level output voltage
VI = VIH or VIL
IOL = 20 µA
2 V to 6 V
0.002
0.1
V
IOL = 6 mA
4.5 V
0.18
0.30
IOL = 7.8 mA
6 V
0.22
0.33
II
Input leakage current
VI = VCC or 0
VI = VCC or 0
6 V
±100
±1000
nA
IOZ
Off-State (High-Impedance
State) Output Current
VO = VCC or 0
VO = VCC or 0
6 V
0.01
2
µA
ICC
Supply current
VI = VCC or 0, IO = 0
6 V
0.1
2
µA
Ci
Input capacitance
2 V to 6 V
5
pF
(1)
Guaranteed by design.
6.6 Switching Characteristics
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted). See Parameter
Measurment Information. CL = 50 pF.
PARAMETER
FROM
TO
VCC
Operating free-air temperature (TA)
UNIT
25°C
–40°C to 125°C
MIN
TYP
MAX
MIN
TYP
MAX
tpd
Propagation delay
A or B
B or A
2 V
21
32
49
ns
4.5 V
8
13
15
6 V
7
11
13
ten
Enable time
OE
A or B
2 V
52
77
95
ns
4.5 V
20
30
38
6 V
16
24
31
tdis
Disable time
OE
A or B
2 V
36
54
63
ns
4.5 V
16
24
30
6 V
14
21
25
tt
Transition-time
Any output
2 V
13
16
ns
4.5 V
7
9
6 V
6
8
www.ti.com
SN74HCS245
SCLS879 – JANUARY 2022
Copyright © 2022 Texas Instruments Incorporated
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Product Folder Links: SN74HCS245



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