DESCRIPTION

The PCA9515A is a CMOS integrated circuit intended for application in I2C and SMBus systems. While retaining all the operating modes and features of the I2C system it permits extension of the I2C-bus by buffering both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. The I2C-bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9515A enables the system designer to isolate two halves of a bus, thus more devices or longer length can be accommodated. It can also be used to run two buses, one at 5 V and the other at 3.3 V or a 400 kHz and 100 kHz bus, where the 100 kHz bus is isolated when 400 kHz operation of the other is required.

FEATURES

• 2 channel, bi-directional buffer

• I2C-bus and SMBus compatible

• Active-HIGH repeater enable input

• Open-drain input/outputs

• Lock-up free operation

• Supports arbitration and clock stretching across the repeater

• Accommodates standard mode and fast mode I2C devices and multiple masters

• Powered-off high-impedance I2C pins

• Operating supply voltage range of 2.3 V to 3.6 V

• 5.5 V tolerant I2C and enable pins

• 0 to 400 kHz clock frequency1

• ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101.

• Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA.

• Package offerings: SO and TSSOP (MSOP)