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TPS3779 Datasheet(PDF) 9 Page - Texas Instruments |
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TPS3779 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 17 page TPS3779 TPS3780 www.ti.com SBVS216B – SEPTEMBER 2012 – REVISED MAY 2013 OUTPUTS (OUT1, OUT2) In a typical device application, the outputs are connected to a reset or enable input of the processor, such as a digital signal processor (DSP), central processing unit (CPU), field-programmable gate array (FPGA), or application-specific integrated circuit (ASIC); or the outputs are connected to the enable input of a voltage regulator, such as a dc-dc or low-dropout (LDO) regulator. The TPS3779 provides two push-pull outputs. The logic high level of the outputs is determined by the VCC pin voltage. With this configuration, pull-up resistors are not required and some board area can be saved. However, all interface logic levels should be examined. All OUT connections must be compatible with the VCC pin logic level. The TPS3780 provides two open-drain outputs (OUT1 and OUT2); pull-up resistors must be used to hold these lines high when the output goes to a high impedance condition (not asserted). By connecting pull-up resistors to the proper voltage rails, the outputs can be connected to other devices at correct interface voltage levels. The outputs can be pulled up to 6.5 V, independent of the device supply voltage. To ensure proper voltage levels, make sure to choose the correct pull-up resistor values. The pull-up resistor value is determined by VOL, the sink current capability, and the output leakage current (Ilkg(OD)). These values are specified in the Electrical Characteristics table. By using wired-AND logic, OUT1 and OUT2 can be merged into one logic signal. The Inputs (SENSE1, SENSE2) section describes how the outputs are asserted or deasserted. Refer to Figure 13 for a description of the relationship between threshold voltages and the respective output. Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: TPS3779 TPS3780 |
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