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SN74ACT245DBR Scheda tecnica(PDF) 3 Page - Texas Instruments

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Il numero della parte SN74ACT245DBR
Spiegazioni elettronici  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SN74ACT245DBR Scheda tecnica(HTML) 3 Page - Texas Instruments

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SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452E – SEPTEMBER 1994 – REVISED OCTOBER 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54ACT245
SN74ACT245
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
4.5
5.5
4.5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
IOH
High-level output current
–24
–24
mA
IOL
Low-level output current
24
24
mA
Dt/Dv
Input transition rise or fall rate
8
8
ns/V
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
SN54ACT245
SN74ACT245
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
IOH = 50 mA
4.5 V
4.4
4.49
4.4
4.4
IOH = –50 mA
5.5 V
5.4
5.49
5.4
5.4
VOH
IOH = 24 mA
4.5 V
3.88
3.7
3.76
V
VOH
IOH = –24 mA
5.5 V
4.86
4.7
4.76
V
IOH = –50 mA†
5.5 V
3.85
IOH = –75 mA†
5.5 V
3.85
IOL =50 mA
4.5 V
0.001
0.1
0.1
0.1
IOL = 50 mA
5.5 V
0.001
0.1
0.1
0.1
VOL
IOL =24mA
4.5 V
0.36
0.5
0.44
V
VOL
IOL = 24 mA
5.5 V
0.36
0.5
0.44
V
IOL = 50 mA†
5.5 V
1.65
IOL = 75 mA†
5.5 V
1.65
IOZ
A or B ports‡
VO = VCC or GND
5.5 V
±0.5
±10
±5
mA
II
OE or DIR
VI = VCC or GND
5.5 V
±0.1
±1
±1
mA
ICC
VI = VCC or GND,
IO = 0
5.5 V
4
80
40
mA
DICC§
One input at 3.4 V,
Other inputs at GND or VCC
5.5 V
0.6
1.6
1.5
mA
Ci
VI = VCC or GND
5 V
4.5
pF
Cio
VO = VCC or GND
5 V
15
pF
† Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
‡ For I/O ports, the parameter IOZ includes the input leakage current.
§ 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.


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