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74LVC8T245DBQRG4 数据表(PDF) 4 Page - Texas Instruments

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部件名 74LVC8T245DBQRG4
功能描述  8-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

74LVC8T245DBQRG4 数据表(HTML) 4 Page - Texas Instruments

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Recommended Operating Conditions
(1) (2) (3) (4)
SN74LVC8T245
8-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES584A – JUNE 2005 – REVISED AUGUST 2005
VCCI
VCCO
MIN
MAX
UNIT
VCCA
1.65
5.5
Supply voltage
V
VCCB
1.65
5.5
1.65 V to 1.95 V
VCCI × 0.65
2.3 V to 2.7 V
1.7
High-level
VIH
Data inputs(5)
V
input voltage
3 V to 3.6 V
2
4.5 V to 5.5 V
VCCI × 0.7
1.65 V to 1.95 V
VCCI × 0.35
2.3 V to 2.7 V
0.7
Low-level
VIL
Data inputs(5)
V
input voltage
3 V to 3.6 V
0.8
4.5 V to 5.5 V
VCCI × 0.3
1.65 V to 1.95 V
VCCA × 0.65
2.3 V to 2.7 V
1.7
High-level
Control inputs
VIH
V
input voltage
(referenced to VCCA)(6)
3 V to 3.6 V
2
4.5 V to 5.5 V
VCCA × 0.7
1.65 V to 1.95 V
VCCA × 0.35
2.3 V to 2.7 V
0.7
Low-level
Control inputs
VIL
V
input voltage
(referenced to VCCA)(6)
3 V to 3.6 V
0.8
4.5 V to 5.5 V
VCCA × 0.3
VI
Input voltage
Control inputs
0
5.5
V
Active state
0
VCCO
V
Input/output
VI/O
voltage
3-State
0
5.5
V
1.65 V to 1.95 V
–4
2.3 V to 2.7 V
–8
IOH
High-level output current
mA
3 V to 3.6 V
–24
4.5 V to 5.5 V
–32
1.65 V to 1.95 V
4
2.3 V to 2.7 V
8
IOL
Low-level output current
mA
3 V to 3.6 V
24
4.5 V to 5.5 V
32
1.65 V to 1.95 V
20
2.3 V to 2.7 V
20
Input transition
∆t/∆v
Data inputs
ns/V
rise or fall rate
3 V to 3.6 V
10
4.5 V to 5.5 V
5
TA
Operating free-air temperature
–40
85
°C
(1)
VCCI is the VCC associated with the data input port.
(2)
VCCO is the VCC associated with the output port.
(3)
All unused or driven (floating) data inputs (I/Os) of the device must be held at logic HIGH or LOW (preferably VCCI or GND) to ensure
proper device operation and minimize power. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature
number SCBA004.
(4)
All unused control inputs must be held at VCCA or GND to ensure proper device operation and minimize power comsumption.
(5)
For VCCI values not specified in the data sheet, VIH min = VCCI × 0.7 V, VIL max = VCCI × 0.3 V.
(6)
For VCCA values not specified in the data sheet, VIH min = VCCA × 0.7 V, VIL max = VCCA × 0.3 V.
4


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