FXLA104UM12X_12 FAIRCHILD [Fairchild Semiconductor], FXLA104UM12X_12 Datasheet - Page 5

• Manufacturer Part Number: FXLA104UM12X_12
• Description: Low-Voltage Dual-Supply 4-Bit Voltage Translator with Configurable Voltage Supplies and Signal Levels, 3-State Outputs, and Auto Direction Sensing
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

© 2009 Fairchild Semiconductor Corporation
FXLA104 • Rev. 1.0.9
Power-Up/Power-Down Sequence
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 input (/OE) is
designed to track the V
tying /OE to V
contention, excessive currents, or oscillations do not
occur during power-up or power-down. The size of the
pull-up resistor is based upon the current-sinking
capability of the device driving the /OE pin.
The recommended power-up sequence is:
1.
2.
3.
Apply power to the first V
Apply power to the second V
Drive the /OE input LOW to enable the device.
CCA
should be used to ensure that bus
CCA
CC
CC
supply. A pull-up resistor
is at 0V, outputs are in a
.
CC
.
CC
5
The recommended power-down sequence is:
1.
2.
3.
Pull-Up/Pull-Down Resistors
Do not use pull-up or pull-down resistors. This device
has bus-hold circuits: pull-up or pull-down resistors are
not recommended because they interfere with the
output state. The current through these resistors may
exceed the hold drive, I
currents, resulting in data transition and/or auto-
direction
eliminates the need for extra resistors.
Drive /OE input HIGH to disable the device.
Remove power from either V
Remove power from other V
sensing
failures.
I(HOLD)
The
CC.
CC
and/or I
.
bus-hold
I(OD)
www.fairchildsemi.com
bus-hold
feature