4-Bit Bidirectional Voltage Level Translator for Open Drain and Push-Pull Applications CXCO4335 is a qual bidirectional I2 C and SMBUS voltage-level translator with an output enable (OE) input, and is

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The CXCO4335 is a qual bidirectional I2 C and SMBUS voltage-level translator with an output enable (OE) input, and is operational from 1.2V to 3.3V VCCA and 2.5V to 5.5V VCCB. It allows bidirectional voltage translations between 1.2V and 5V, without use of directional pin. The low ON-state resistance (rON) of the switch ensures the connections to be with minimal propagation delay. When OE is high, the translator switch is ON, and the AN I/O are connected to the BN I/O, respectively, allowing bidirectional data flow between ports. When OE is low, the translator switch is off, and a high-impedance exists between ports. Pull-up resistors are included on input and output lines internally to provide the logic high levels on the translator’s bus. The size of the pull-up resistors are 10kΩ, and is allowed to use lower pull-up resistor value to minimal 1kΩ by adding external resistor. All channels have the same electrical characteristics, and there is minimal deviation from one output to another in voltage or propagation delay. This is a benefit over discrete translation solutions, since the fabrication of the switch is symmetrical.

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„ 4-Bit Bidirectional Translator for Open Drain and Push-Pull Bus Applications mUg嘉泰姆

„ I 2 C and SMBus Compatible mUg嘉泰姆

„ Less than 1.5ns Maximum Propagation Delay to Accommodate Standard-Mode and Fast-Model I 2 C Devices and Multiple Masters mUg嘉泰姆

„ Allows Voltage-Level Translator Between mUg嘉泰姆

Š 1.8V VCCA and 2.5V, 3.3V, 5V VCCB mUg嘉泰姆

Š 2.5V VCCA and 3.3V, 5V VCCB mUg嘉泰姆

Š 3.3V VCCA and 5V VCCB mUg嘉泰姆

Š VCCA ≦ VCCB mUg嘉泰姆

„ Provides Bidirectional Voltage Translation without Direction Pin mUg嘉泰姆

„ Max Data Rates mUg嘉泰姆

Š 24Mbps for Push Pull mUg嘉泰姆

Š Over 1.3Mbps for Open Drain mUg嘉泰姆

„ Low 3.5Ω ON-State Connection Between Input and Output Ports Provides Less Signal Distortion mUg嘉泰姆

„ Open-Drain I2 C I/O Ports mUg嘉泰姆

„ 5V Tolerant I2 C I/O Ports to Support Mixed Mode Signal Operation „ High Impedance AN and BN Pins for OE=Low mUg嘉泰姆

„ Lock-up-Free Operation for Isolation When OE=Low mUg嘉泰姆

„ IEC 61000-4-2 Level 4 (±8kV Contact Discharge and ±15kV Air-gap Discharge) ESD Protection for pins B1, B2, B3, B4, OE and VCCB. 2kV HBM IEC61340-3-1 Protection for All Other Pins.mUg嘉泰姆

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