参数资料
型号: SN74LV244ATDWR
厂商: TEXAS INSTRUMENTS INC
元件分类: 总线收发器
英文描述: LV/LV-A/LVX/H SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20
封装: GREEN, PLASTIC, SOIC-20
文件页数: 12/19页
文件大小: 676K
代理商: SN74LV244ATDWR
www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
1
2
18
1Y1
1OE
1A1
4
16
1Y2
1A2
6
14
1Y3
1A3
8
12
1Y4
1A4
19
11
9
2Y1
2OE
2A1
13
7
2Y2
2A2
15
5
2Y3
2A3
17
3
2Y4
2A4
SN74LV244AT
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES572C – JUNE 2004 – REVISED AUGUST 2005
To ensure the high-impedance state during power up or power down, OE shall 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.
FUNCTION TABLE
(EACH 4-BIT BUFFER/DRIVER)
INPUTS
OUTPUT
Y
OE
A
L
H
L
H
X
Z
LOGIC DIAGRAM (POSITIVE LOGIC)
2
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