FXLA0104QFX datasheet(5/17 Pages) FAIRCHILD

Part #	FXLA0104QFX

Description	Low-Voltage Dual-Supply 4-Bit Voltage Translator with Configurable Voltage Supplies and Signal Levels,

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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FXLA0104 • Rev. 1.0.0

5

Power-Up/Power-Down Sequence

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 0V, outputs are in a

high-impedance

state.

The

control

input

(OE)

is

designed to track the VCCA supply.

The recommended power-up sequence is:

1.

Apply power to the first VCC.

2.

Apply power to the second VCC.

3.

Drive the OE input HIGH to enable the device.

The recommended power-down sequence is:

1.

Drive OE input LOW to disable the device.

2.

Remove power from either VCC.

3.

Remove power from other VCC.

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, II(HOLD) and/or II(OD) bus-hold

currents, resulting in data transition and/or auto-

direction

sensing

failures.

The

bus-hold

feature

eliminates the need for extra resistors.

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FXLA0104QFX Datasheet(PDF) 5 Page - Fairchild Semiconductor

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