參數(shù)資料
型號(hào)： SN74LVC244ARGYRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 總線收發(fā)器
英文描述： LVC/LCX/Z SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PQCC20
封裝： PLASTIC, MO-241BC, QFN-20
文件頁(yè)數(shù)： 12/26頁(yè)
文件大?。?/td> 932K
代理商： SN74LVC244ARGYRG4
www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
GQN OR ZQN PACKAGE
(TOP VIEW)
1
2
3
4
A
B
C
D
E
SN74LVC244A
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS414X – NOVEMBER 1992 – REVISED MARCH 2005
The SN74LVC244A is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is
low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in
a mixed 3.3-V/5-V system environment.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
TERMINAL ASSIGNMENTS
1
2
3
4
A
1A1
1OE
VCC
2OE
B
1A2
2A4
2Y4
1Y1
C
1A3
2Y3
2A3
1Y2
D
1A4
2A2
2Y2
1Y3
E
GND
2Y1
2A1
1Y4
FUNCTION TABLE
(EACH BUFFER)
INPUTS
OUTPUT
Y
OE
A
L
H
L
H
X
Z
2
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參數(shù)描述
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