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参数资料
| 型号： | FXL4TD245UMX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 8/14页 |
| 文件大小： | 0K |
| 描述： | TRANSLATOR 4BIT DUAL VOLT 16UMLP |
| 标准包装： | 1 |
| 逻辑功能： | 变换器，双向，3 态 |
| 位数： | 4 |
| 输入类型： | 电压 |
| 输出类型： | 电压 |
| 通道数： | 1 |
| 输出/通道数目： | 4 |
| 差分 - 输入:输出： | 无/无 |
| 传输延迟（最大）： | 3.5ns |
| 电源电压： | 1.1 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-UMLP |
| 供应商设备封装： | 16-UMLP（1.8x2.6） |
| 包装： | 标准包装 |
| 其它名称： | FXL4TD245UMXDKR |
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FXL4TD245 Rev. 1.0.6
3
FXL4TD2
4
5
—
Low
-V
olt
a
ge
Dual-Supply
4
-Bi
tSignal
T
ransl
ator
w
it
h
Conf
igura
b
le
V
o
lt
a
g
e
Supplie
s
a
nd
Si
gnal
Leve
ls
and
3
-S
T
A
T
E
Output
s
and
Inde
pendent
Dire
ction
Controls
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Don't Care
Power-Up/Power-Down Sequencing
FXL translators offer an advantage in that either VCC
may be powered up first. This benefit derives from the
chip design. When either VCC is at 0 volts, outputs are in
a HIGH-Impedance state. The control inputs (T/Rn and
OE) are designed to track the VCCA supply. A pull-up
resistor tying OE to VCCA 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 VCC.
2. Apply power to the T/Rn inputs (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 VCC.
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 VCC.
3. Remove power from other VCC.
Inputs
Outputs
OE T/R0 T/R1 T/R2 T/R3
L
X
B0 Data to A0 Output
L
H
X
A0 Data to B0 Output
L
X
L
X
B1 Data to A1 Output
L
X
H
X
A1 Data to B1 Output
L
X
L
X
B2 Data to A2 Output
L
X
H
X
A2 Data to B2 Output
L
X
L
B3 Data to A3 Output
L
X
H
A3 Data to B3 Output
H
X
3-State
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