FXMA2104 FAIRCHILD [Fairchild Semiconductor], FXMA2104 Datasheet - Page 5

• Manufacturer Part Number: FXMA2104
• Description: Dual-Supply, 4-Bit Voltage Translator / Buffer / Repeater
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

© 2011 Fairchild Semiconductor Corporation
FXMA2104 • Rev. 1.0.1
Functional 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
contention, 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.
Application Circuit
CCA
CC
supply. A pull-down resistor
is at 0V, outputs are in a
Figure 3. Application Circuit
CC
5
The recommended power-up sequence is:
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:
1. Drive OE input LOW to disable the device.
2. Remove power from either V
3. Remove power from other V
Note:
4.
Alternatively, the OE pin can be hardwired to V
to save GPIO pins. If OE is hardwired to V
either V
CC
can be powered up or down first.
CC
.
CC
CC
CC
.
.
.
www.fairchildsemi.com
CCA
,
CCA