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參數(shù)資料
| 型號： | FXL5T244BQX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 其它接口 |
| 英文描述： | Low Voltage Dual Supply 5-Bit Signal Translator with Configurable Voltage Supplies with Configurable Voltage Supplies |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, QCC14 |
| 封裝： | 2.50 X 3 MM, MO-241, QFN-14 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 514K |
| 代理商： | FXL5T244BQX |
www.fairchildsemi.com
2
F
Terminal Descriptions
Truth Table
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Don’t Care
Connection Diagram
Terminal Assignments for DQFN
(Top View)
Terminal Assignment
Power-Up/Power-Down Sequencing
FXL translators offer an advantage in that either V
CC
may
be powered up first. This benefit derives from the chip
design. When either V
CC
is at 0 volts, outputs are in a
HIGH-Impedance state. The control input, OE, is designed
to track the V
CCI
supply. A pull-up resistor tying OE to V
CCI
should be used to ensure that bus contention, excessive
currents, or oscillations do not occur during power-up/
power-down. The size of the pull-up resistor is based upon
the current-sinking capability of the OE driver.
The recommended power-up sequence is the following:
1. Apply power to either V
CC
.
2. Apply power to the OE input (Logic HIGH for A-to-B
operation; Logic LOW for B-to-A operation) and to the
respective data inputs (A Port or B Port). This may
occur at the same time as Step 1.
3. Apply power to other V
CC
.
4. Drive the OE input LOW to enable the device.
The recommended power-down sequence is the following:
1. Drive OE input HIGH to disable the device.
2. Remove power from either V
CC
.
3. Remove power from other V
CC
.
Terminal
Names
Description
OE
Output Enable Input
A
n
Y
n
V
CCI
V
CCO
GND
Data Inputs
3-STATE Outputs
Inputs Power Supply
Outputs Power Supply
Ground
Inputs
Outputs
OE
A
n
Y
n
L
L
L
L
H
H
H
X
3-STATE
Terminal Number
1
2
3
4
5
6
7
Terminal Name
V
CCI
A
0
A
1
A
2
A
3
A
4
GND
8
9
10
11
12
13
14
OE
Y
4
Y
3
Y
2
Y
1
Y
0
V
CCO
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