adg3231 Analog Devices, Inc., adg3231 Datasheet - Page 9

• Manufacturer Part Number: adg3231
• Description: 1.65 V To 3.6 V, Single-channel Level Translator In Sot-66 Package
• Manufacturer: Analog Devices, Inc.

THEORY OF OPERATION
The ADG3231 is a single-channel level translator designed on a
submicron process that is guaranteed to operate over the 1.65 V
to 3.6 V supply range. The device can be used in applications
requiring communication between digital devices operating
from multiple supply voltages. The logic levels on each side of
the device are set by the two supply voltages, V
V
flow only from A to Y.
The ADG3231 can operate with any combination of V
and V
allowing the part to perform either up (V
(V
CC2
CC1
for Y. The signal path is unidirectional, meaning data can
> V
CC2
supply voltages within the 1.65 V to 3.6 V range,
CC2
) level translation.
SIGNAL INPUT
CC1
DEVICE 1
Figure 19. Typical Application of the ADG3231 Level Translator
V
CC1
< V
CC1
CC2
for A, and
) or down
CC1
A
ADG3231
V
CC1
Rev. B | Page 9 of 12
GND
V
CC2
By limiting the current delivered into the load, for example,
~1.7 mA with V
current overload, which can occur when the Y pin is
accidentally shorted to the V
The short-circuit protection circuitry works by limiting
the output current when the output voltage exceeds
V
values specified for the V
Figure 19 shows a typical application for the ADG3231 where
the device performs level translation from V
levels to V
between the two digital devices, DEVICE 1 and DEVICE 2.
OL
Y
(A = 0 logic) or is less than V
CC2
DEVICE 2
V
-compatible levels to allow proper communication
CC2
CC2
= 3.6 V, the output stage is protected against
SIGNAL OUTPUT
CC2
supply voltage used.
CC2
or GND rails.
OH
(A = 1 logic) threshold
CC1
-compatible
ADG3231