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TXB0101DCKRG4 Datasheet(PDF) 11 Page - Texas Instruments |
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TXB0101DCKRG4 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 31 page OE A VCCA VCCB One-Shot 4 N One-Shot 4 N B TXB0101 www.ti.com SCES639C – JANUARY 2007 – REVISED JUNE 2015 8 Detailed Description 8.1 Overview The TXB0101 device is a 1-bit directionless level-shifting and voltage translator specifically designed for translating logic voltage levels. The A port is able to accept I/O voltages ranging from 1.2 V to 3.6 V, while the B port can accept I/O voltages from 1.65 V to 5.5 V. The device is a buffered architecture with edge rate accelerators (one-shots) to improve the overall data rate. This device can only translate push-pull CMOS logic outputs. If for open-drain signal translation, please refer to TI TXS010X products. 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Architecture The TXB0101 architecture (see Figure 5) does not require a direction-control signal to control the direction of data flow from A to B or from B to A. In a DC state, the output drivers of the TXB0101 can maintain a high or low, but are designed to be weak, so that they can be overdriven by an external driver when data on the bus starts flowing the opposite direction. The output one-shots detect rising or falling edges on the A or B ports. During a rising edge, the one-shot turns on the PMOS transistors (T1, T3) for a short duration, which speeds up the low-to-high transition. Similarly, during a falling edge, the one-shot turns on the NMOS transistors (T2, T4) for a short duration, which speeds up the high-to-low transition. The typical output impedance during output transition is 70 Ω at VCCO = 1.2 V to 1.8 V, 50 Ω at VCCO = 1.8 V to 3.3 V, and 40 Ω at VCCO = 3.3 V to 5 V. Copyright © 2007–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TXB0101 |
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