FXL4245MPX_10 FAIRCHILD [Fairchild Semiconductor], FXL4245MPX_10 Datasheet - Page 9

• Manufacturer Part Number: FXL4245MPX_10
• Description: Low-Voltage, Dual-Supply, 8-Bit, Signal Translator with Configurable Voltage Supplies, Signal Levels, and 3-State Outputs
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

© 2004 Fairchild Semiconductor Corporation
FXL4245 • Rev. 1.0.3
Functional Description
Power-Up/Power-Down Sequencing
FXL 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 inputs (T/R and OE)
are designed to track the V
tying OE to V
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.
CCA
should be used to ensure that bus
CCA
CC
is at 0V, outputs are in a
supply. A pull-up resistor
CC
9
The recommended power-up sequence is:
1.
2.
3.
4.
The recommended power-down sequence is:
1.
2.
3.
Apply power to either V
Apply power to the T/R 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.
Apply power to the other V
Drive the OE input LOW to enable the device.
Drive OE input HIGH to disable the device.
Remove power from either V
Remove power from the other V
CC
.
CC
.
CC
.
CC
.
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