P82B96PW Интерфейс - буферы, повторители, разветвители сигналов от Texas Instruments

Обзор продукта

Обзор

The P82B96 is a bipolar IC that creates a non-latching, bi-directional, logic interface between the normal I2C-bus and a range of other bus configurations. It can interface I2C-bus logic signals to similar buses having different voltage and current levels. For example it can interface to the 350 µA SMB bus, to 3.3 V logic devices, and to 15 V levels and/or low impedance lines to improve noise immunity on longer bus lengths. FEATURES • Bi-directional data transfer of I2C-bus signals • Isolates capacitance allowing 400 pF on Sx/Sy side and 4000 pF on Tx/Ty side • Tx/Ty outputs have 60 mA sink capability for driving low impedance or high capacitive buses • 400 kHz operation over at least 20 meters of wire (see AN10148) • Supply voltage range of 2 V to 15 V with I2C logic levels on Sx/Sy side independent of supply voltage • Splits I2C signal into pairs of forward/reverse Tx/Rx, Ty/Ry signals for interface with opto-electrical isolators and similar devices that need uni-directional input and output signal paths. • Low power supply current • ESD protection exceeds 3500 V HBM per JESD22-A114, 250 V DIP package / 400 V SO package MM per JESD22-A115, and 1000 V CDM per JESD22-C101 • Latch-up free (bipolar process with no latching structures) • Packages offered: DIP, SO, and TSSOP TYPICAL APPLICATIONS • Interface between I2C buses operating at different logic levels (e.g., 5 V and 3 V or 15 V) • Interface between I2C and SMB (350 µA) bus standard. • Simple conversion of I2C SDA or SCL signals to multi-drop differential bus hardware, e.g., via compatible PCA82C250. • Interfaces with Opto-couplers to provide Opto isolation between I2C-bus nodes up to 400 kHz.