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參數(shù)資料
| 型號(hào)： | LC245A |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS |
| 中文描述： | 八路總線收發(fā)器具有三態(tài)輸出 |
| 文件頁數(shù)： | 2/19頁 |
| 文件大?。?/td> | 585K |
| 代理商： | LC245A |
www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
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.
GQN OR ZQN PACKAGE
(TOP VIEW)
1
2
3
4
A
B
C
D
E
DIR
OE
A1
B1
To Seven Other Channels
1
2
19
18
Pin numbers shown are for the DB, DGV, DW, N, NS, PW, and RGY packages.
SN74LVC245A
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCAS218T–JANUARY 1993–REVISED FEBRUARY 2005
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.
This device is fully specified for partial-power-down applications using I
. The I
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
TERMINAL ASSIGNMENTS
1
2
3
4
A
B
C
D
E
A1
A3
A5
A7
GND
DIR
B2
A4
B6
A8
V
CC
A2
B4
A6
B8
OE
B1
B3
B5
B7
FUNCTION TABLE
INPUTS
OE
L
L
H
OPERATION
DIR
L
H
X
B data to A bus
A data to B bus
Isolation
LOGIC DIAGRAM (POSITIVE LOGIC)
2
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