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SN74HCT245DW датащи(PDF) 3 Page - Texas Instruments

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номер детали SN74HCT245DW
подробное описание детали  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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SN74HCT245DW датащи(HTML) 3 Page - Texas Instruments

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SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54HCT245
SN74HCT245
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
VCC = 4.5 V to 5.5 V
2
2
V
VIL
Low-level input voltage
VCC = 4.5 V to 5.5 V
0.8
0.8
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
∆t/∆v
Input transition rise/fall time
500
500
ns
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
TA = 25°C
SN54HCT245
SN74HCT245
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
VOH
VI = VIH or VIL
IOH = –20 µA
4.5 V
4.4
4.499
4.4
4.4
V
VOH
VI = VIH or VIL
IOH = –6 mA
4.5 V
3.98
4.3
3.7
3.84
V
VOL
VI = VIH or VIL
IOL = 20 µA
4.5 V
0.001
0.1
0.1
0.1
V
VOL
VI = VIH or VIL
IOL = 6 mA
4.5 V
0.17
0.26
0.4
0.33
V
II
DIR or OE
VI = VCC or 0
5.5 V
±0.1
±100
±1000
±1000
nA
IOZ
A or B
VO = VCC or 0
5.5 V
±0.01
±0.5
±10
±5
µA
ICC
VI = VCC or 0,
IO = 0
5.5 V
8
160
80
µA
∆ICC†
One input at 0.5 V or 2.4 V,
Other inputs at 0 or VCC
5.5 V
1.4
2.4
3
2.9
mA
Ci‡
DIR or OE
4.5 V
to 5.5 V
3
10
10
10
pF
† This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.
‡ Parameter Ci does not apply to transceiver I/O ports.
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HCT245
SN74HCT245
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
tpd
A or B
B or A
4.5 V
16
22
33
28
ns
tpd
A or B
B or A
5.5 V
14
20
30
25
ns
ten
OE
A or B
4.5 V
25
46
69
58
ns
ten
OE
A or B
5.5 V
22
41
62
52
ns
tdis
OE
A or B
4.5 V
26
40
60
50
ns
tdis
OE
A or B
5.5 V
23
36
54
45
ns
tt
A or B
4.5 V
9
12
18
15
ns
tt
A or B
5.5 V
8
11
16
14
ns


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