ST2349 Datasheet, PDF (1/23 Pages) STMicroelectronics – 4-bit dual supply level translator without direction control pin

ST2349
4-bit dual supply level translator
without direction control pin
Features
■ 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 – when either
supply is off, all I/Os are in high impedance
■ Low quiescent current (max 24 µA)
■ Able to be driven by totem pole and open drain
drivers
■ 5.5 V tolerant enable pin
■ ESD performance on all pins: ±2 kV HBM
■ Small package and footprint
QFN16 (2.6 x 1.8 mm) package
Applications
■ Low voltage system level translation
■ Mobile phones and other mobile devices
■ I²C level translation
■ UART level translation
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.
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
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