ST2349AQTR STMicroelectronics

ST2349A 4-bit dual supply level translator without direction control pin Features 18 Mbps (max) data rate when driven by a totem pole driver 6.8 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 QFN16 Wide V voltage range of 1.80 to 5.5 V CC (2.6x1.8 mm) Power down mode feature when either supply is off, all I/Os are in high impedance Description Low quiescent current (max 8 A) Able to be driven by totem pole and open drain The ST2349A is a 4-bit dual supply level drivers translator which provides the level shifting capability to allow data transfer in a multi-voltage 5.5 V tolerant enable pin system. Externally applied voltages, V and V , CC L ESD performance on all pins: 2 kV HBM set the logic levels on either side of the device. It Small package and footprint utilizes transmission gate-based design that QFN16 (2.6 x 1.8 mm) package allows bi-directional level translation without a control pin. Applications The ST2349A accepts a V from 1.65 to 3.6 V L and V from 1.80 to 5.5 V, making it ideal for CC Low voltage system level translation data transfer between low-voltage ASICs/PLD Mobile phones and other mobile devices and higher voltage systems. This device has a tri- 2 state output mode which can be used to disable I C level translation all I/Os. UART level translation The ST2349A supports power down mode when V is grounded/floating and the device is CC disabled via the OE pin. Table 1. Device summary Order code Package Packaging ST2349AQTR QFN16 (2.6 x 1.8 mm) Tape and reel (3000 parts per reel) June 2009 Doc ID 14908 Rev 2 1/20 www.st.com 20 Contents ST2349A Contents 1 Pin settings 3 1.1 Pin connection 3 1.2 Pin description 3 2 Device block diagrams . 4 3 Supplementary notes 5 3.1 Driver requirement . 5 3.2 Load driving capability 5 3.3 Power off feature 5 3.4 Truth table 5 4 Maximum rating . 6 4.1 Recommended operating conditions . 6 5 Electrical characteristics . 7 5.1 DC characteristics . 7 5.2 AC characteristics . 9 5.2.1 Device driven by open drain driver 9 5.2.2 Device driven by totem pole driver . 11 6 Test circuit 13 7 Package mechanical data 15 8 Revision history . 19 2/20 Doc ID 14908 Rev 2