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45 Mbps (max) data rate when driven by a
totem pole driver
4 Mbps (max) data rate when driven by an
open drain pole driver
Bi-directional level translation without
direction control pin
Wide V
L
voltage range of 1.65 to 3.6 V
Wide V
CC
voltage range of 1.80 to 5.5 V
Power down mode feature 鈥?when either
supply is off, all I/Os are in high impedance
Low quiescent current (max 24 碌A(chǔ))
Able to be driven by totem pole and open drain
drivers
5.5 V tolerant enable pin
ESD performance on all pins: 鹵2 kV HBM
Small package and footprint
QFN16 (2.6 x 1.8 mm) package
QFN16L
(2.6 x 1.8 mm)
Description
The ST2349 is a 4-bit dual supply level translator
which provides the level shifting capability to allow
data transfer in a multi-voltage system. Externally
applied voltages, V
CC
and V
L
, set the logic levels
on either side of the device. It utilizes
transmission gate-based design that allows bi-
directional level translation without a control pin.
The ST2349 accepts a V
L
from 1.65 to 3.6 V and
V
CC
from 1.80 to 5.5 V, making it ideal for data
transfer between low-voltage ASICs/PLD and
higher voltage systems. This device has a tri-state
output mode which can be used to disable all
I/Os.
The ST2349 supports power down mode when
V
CC
is grounded/floating and the device is
disabled via the OE pin.
Applications
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Low voltage system level translation
Mobile phones and other mobile devices
I
2
C level translation
UART level translation
Table 1.
Device summary
Order code
ST2349QTR
Package
QFN16 (2.6 x 1.8 mm)
Packaging
Tape & reel (3000 parts per reel)
November 2007
Rev 3
1/23
www.st.com
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