描述 Description

The PCA9600 is designed to isolate I2C-bus capacitance, allowing long buses to bedriven in point-to-point or multipoint applications of up to 4000 pF. The PCA9600 is ahigher-speed version of the P82B96. It creates a non-latching, bidirectional, logic interfacebetween a normal I2C-bus and a range of other higher capacitance or different voltagebus configurations. It can operate at speeds up to at least 1 MHz, and the high drive sideis compatible with the Fast-mode Plus (Fm+) specifications.
The PCA9600 features temperature-stabilized logic voltage levels at its SX/SY interfacemaking it suitable for interfacing with buses that have non I2C-bus-compliant logic levelssuch as SMBus, PMBus, or with microprocessors that use those same TTL logic levels.
The separation of the bidirectional I2C-bus signals into unidirectional TX and RX signalsenables the SDA and SCL signals to be transmitted via balanced transmission lines(twisted pairs), or with galvanic isolation using opto or magnetic coupling. The TX and RXsignals may be connected together to provide a normal bidirectional signal.

特性 Features

Bidirectional 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-capacitivebuses
1 MHz operation on up to 20 meters of wire (see AN10658)
Supply voltage range of 2.5 V to 15 V with I2C-bus logic levels on SX/SY sideindependent of supply voltage
Splits I2C-bus signal into pairs of forward/reverse TX/RX, TY/RY signals for interfacewith opto-electrical isolators and similar devices that need unidirectional input andoutput signal paths
Low power supply current
ESD protection exceeds 3500 V HBM per JESD22-A114 and 1400 V CDM per JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
Packages offered: SO8 and TSSOP8 (MSOP8)

應(yīng)用 Application

Interface between I2C-buses operating at different logic levels (for example, 5 V and3 V or 15 V)
Interface between I2C-bus and SMBus (350 μA) standard or Fm+ standard
Simple conversion of I2C-bus SDA or SCL signals to multi-drop differential bushardware, for example, via compatible PCA82C250
Interfaces with opto-couplers to provide opto-isolation between I2C-bus nodes up to1 MHz
Long distance point-to-point or multipoint architectures