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The PCA9615DPZ is a Fast-mode Plus (Fm+) SMBus/I²C-bus buffer that extends the normal single-ended SMBus/I²C-bus through electrically noisy environments using a differential SMBus/I²C-bus (dI²C) physical layer, which is transparent to the SMBus/I²C-bus protocol layer. It consists of two single-ended to differential driver channels for the SCL (serial clock) and SDA (serial data).

System Features

New dI2C-bus buffers offer improved resistance to system noise and ground offset up to 1⁄2 of supply voltage

2 channel dI2C (differential I2C-bus) to Fm+ single-ended buffer operating up to 1 MHz with 30 mA SDA/SCL drive capability

Hot swap (allows insertion or removal of modules or card without disruption to bus data)

EN signal (PCA9615 input) controls PCA9615 hot swap sequence

Bus idle detect (PCA9615 internal function) waits for a bus idle condition before connection is made

Compatible with I2C-bus Standard/Fast-mode and SMBus, Fast-mode Plus up to 1 MHz

Single-ended I2C-bus on card side up to 540 pF

Differential I2C-bus on cable side supporting multi-drop bus

Maximum cable length: 3 m (approximately 10 feet) (longer at lower frequency)

dI2C output: 1.5 V differential output with nominal terminals

Differential line impedance (user defined): 100 Ω nominal suggested

Receive input sensitivity: ±200 mV

Hysteresis: ±30 mV typical

Input impedance: high-impedance (200 kΩ typical)

Receive input voltage range: ‑0.5 V to +5.5 V

Lock-up free operation

Supports arbitration and clock stretching across the dI2C-bus buffers

Powered-off and powering-up high-impedance I2C-bus pins

Operating supply voltage (VDD(A)) range of 2.3 V to 5.5 V with single-ended side 5.5 V tolerant

Differential I2C-bus operating supply voltage (VDD(B)) range of 3.0 V to 5.5 V with 5.5 V tolerant. Best operation is at 5 V.

ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

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

Package offering: TSSOP10

Applications

• Monitor remote temperature/leak detectors in harsh environment

• Control of power supplies in high noise environment

• Transmission of I2C-bus between equipment cabinets

• Commercial lighting and industrial heating/cooling control

• Any application that requires long I2C-bus runs in electrically noisy environments

• Any application with multiple power suppliers and the potential for ground offsets up to 2.5 V

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