fxm2ic102 Fairchild Semiconductor, fxm2ic102 Datasheet - Page 2

• Manufacturer Part Number: fxm2ic102
• Description: Fxm2ic102 ? Dual Supply 2-bit I2c Interface Voltage Translator With Configurable Voltage Supplies And Signal Levels And Auto-direction Sensing
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FXM2IC102 Rev. 1.0.1
Connection Diagram
Pin Description
Power-Up/Power-Down Sequencing
FXM translators offer an advantage in that either V
may be powered up first. This benefit derives from the
chip design. When either V
high-impedance state. The control input (OE) is
designed to track the V
tying OE to GND should be used to ensure that bus con-
tention, excessive currents, or oscillations do not occur
during power-up/power-down. The size of the pull-down
resistor is based upon the current-sinking capability of
the device driving the OE pin.
Pin #
2, 3
6, 7
1
4
5
8
V
CCB
Name
A
B
V
V
GND
0
OE
1
CCA
CCB
, A
, B
1
0
(Top Through View)
V
B
CCA
8
7
1
0
A-Side Power Supply
A-Side Inputs or 3-State Outputs
Ground
Output Enable Input
B-Side Inputs or 3-State Outputs
B-Side Power Supply
CCA
B
A
CC
6
2
supply. A pull-down resistor
1
0
Description
is at 0V, outputs are in a
OE
A
5
4
3
1
GND
CC
2
Functional Diagram
Function Table
The recommended power-up sequence is the following:
1. Apply power to the first V
2. Apply power to the second V
3. Drive the OE input high to enable the device.
The recommended power-down sequence is the
following:
1. Drive OE input low to disable the device.
2. Remove power from either V
3. Remove power from other V
OE
A
HIGH Logic Level
A
LOW Logic Level
0
1
Control
OE
V
CCA
Normal Operation
3-State
CC
.
CC
CC
CC
.
.
.
Outputs
V
CCB
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B
B
0
1