参数资料
型号: SN74AVCH244DWR
厂商: TEXAS INSTRUMENTS INC
元件分类: 总线收发器
英文描述: AVC SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20
封装: PLASTIC, SO-20
文件页数: 3/10页
文件大小: 166K
代理商: SN74AVCH244DWR
SN74AVCH244
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES262C – APRIL 1999 – REVISED FEBRUARY 2000
3–14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
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.
The SN74AVCH244 is characterized for operation from –40
°C to 85°C.
terminal assignments
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
DGV, DW, OR PW PACKAGE
(TOP VIEW)
FUNCTION TABLE
(each 4-bit buffer/driver)
INPUTS
OUTPUT
OE
A
Y
L
H
L
LL
H
X
Z
logic symbol
2
1A1
4
1A2
6
1A3
8
1A4
EN
1
1Y1
18
1Y2
16
1Y3
14
1Y4
12
11
2A1
13
2A2
15
2A3
17
2A4
EN
19
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1OE
2OE
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
PRODUCT
PREVIEW
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