ST2349| Datasheet

ST2349, ST2349QTR

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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 VL voltage range of 1.65 to 3.6 V Wide VCC 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 uA) 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 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, VCC and VL, set the logic levels on either side of the device. It utilizes transmission gate-based design that allows bidirectional level translation without a control pin. The ST2349 accepts a VL from 1.65 to 3.6 V and VCC 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 VCC is grounded/floating and the device is disabled via the OE pin.

Applications

Low voltage system level translation Mobile phones and other mobile devices I2C 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

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