ST2349QTR STMicroelectronics

ST2349 4-bit dual supply level translator without direction control pin Features 90 Mbps (max) data rate when driven by a totem pole driver 8 Mbps (max) data rate when driven by an open drain pole driver Bi-directional level translation without direction control pin Wide V voltage range of 1.65 to 3.6 V L QFN16L Wide V voltage range of 1.80 to 5.5 V CC (2.6 x 1.8 mm) Power down mode feature when either supply is off, all I/Os are in high impedance Description Low quiescent current (max 24 A) Able to be driven by totem pole and open drain The ST2349 is a 4-bit dual supply level translator drivers which provides the level shifting capability to allow data transfer in a multi-voltage system. Externally 5.5 V tolerant enable pin applied voltages, V and V , set the logic levels CC L ESD performance on all pins: 2 kV HBM on either side of the device. It utilizes Small package and footprint transmission gate-based design that allows bi- QFN16 (2.6 x 1.8 mm) package directional level translation without a control pin. The ST2349 accepts a V from 1.65 to 3.6 V and L Applications V from 1.80 to 5.5 V, making it ideal for data CC transfer between low-voltage ASICs/PLD and Low voltage system level translation higher voltage systems. This device has a tri-state Mobile phones and other mobile devices output mode which can be used to disable all 2 I/Os. I C level translation The ST2349 supports power down mode when UART level translation V is grounded/floating and the device is CC disabled via the OE pin. Table 1. Device summary Order code Package Packaging ST2349QTR QFN16 (2.6 x 1.8 mm) Tape and reel (3000 parts per reel) May 2008 Rev 4 1/23 www.st.com 23 Obsolete Product(s) - Obsolete Product(s)Contents ST2349 Contents 1 Pin settings 5 1.1 Pin connection 5 1.2 Pin description 5 2 Device block diagrams . 6 3 Supplementary notes 7 3.1 Driver requirement . 7 3.2 Load driving capability 7 3.3 Power off feature 7 3.4 Truth table 7 4 Maximum rating . 8 4.1 Recommended operating conditions . 8 5 Electrical characteristics . 9 5.1 AC characteristics (device driven by open drain driver) 11 5.2 AC characteristics (device driven by totem pole driver ) . 13 6 Waveforms 16 7 Package mechanical data 18 8 Revision history . 22 2/23 Obsolete Product(s) - Obsolete Product(s)