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UM2102 - 2-Bit Bidirectional Voltage Level Translator

General Description

The UM2102S allows bidirectional voltage translations between 1.5V and 5V without the use of a direction pin.

The UM2012S is not a bus buffer which provides both level translation and physically isolates the capacitance to either side of the bus when both sides are connected.

Key Features

  • z I2C, SMBus and SPI Level Translation z Less than 3.5ns Maximum Propagation z Low-Voltage ASIC Level Translation Delay to Accommodate Standard-Mode and z Smart Card Readers Fast-Mode I2C-Bus Devices and Multiple z Cell-Phone Cradles Masters z Portable POS Systems z Open-Drain I2C-Bus I/O Ports (SCL1, z Portable Communication Devices SDA1, SCL2 and SDA2) z Low-Cost Serial Interfaces Provides Bidirectional Voltage Translation z Cell-Phones with no Direction Pin z GPS z Low 3.0Ω O.

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Datasheet Details

Part number UM2102
Manufacturer Union Semiconductor
File Size 258.81 KB
Description 2-Bit Bidirectional Voltage Level Translator
Datasheet download datasheet UM2102 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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UM2102 2-Bit Bidirectional Voltage Level Translator for Open-Drain and Push-Pull Applications UM2102S SOT23-6 General Description The UM2102S allows bidirectional voltage translations between 1.5V and 5V without the use of a direction pin. The UM2012S is not a bus buffer which provides both level translation and physically isolates the capacitance to either side of the bus when both sides are connected. The UM2102S only isolates both sides when the VREF is connected to GND. Pull-up resistors are required on both sides to provide the logic HIGH levels on the translator’s bus. The size of these pull-up resistors depends on the system. The device is designed to work with Standard-mode, Fast-mode and Fast-mode Plus I2C-bus devices in addition to SMBus devices.