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參數(shù)資料
| 型號(hào)： | LC540A |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS |
| 中文描述： | 八路緩沖器/ 3司機(jī)態(tài)輸出 |
| 文件頁(yè)數(shù)： | 2/17頁(yè) |
| 文件大?。?/td> | 430K |
| 代理商： | LC540A |
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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
The 3-state control gate is a 2-input AND gate with active-low inputs so that, if either output-enable (OE1 or OE2)
input is high, all outputs are in the high-impedance state.
OE1
OE2
To Seven Other Channels
A1
Y1
1
19
2
18
SN54LVC540A, SN74LVC540A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS297M–JANUARY 1993–REVISED MAY 2005
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
These devices are fully specified for partial-power-down applications using I
. The I
circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
FUNCTION TABLE
INPUTS
OE2
L
L
X
H
OUTPUT
Y
OE1
L
L
H
X
A
L
H
X
X
H
L
Z
Z
LOGIC DIAGRAM (POSITIVE LOGIC)
2
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