CPC5903 datasheet(1/15 Pages) IXYS

No de pièce	CPC5903

Description	Bidirectionally Buffers I2C SDA Signal

PDF	15 Pages

Scroll/Zoom	100%

Fabricant	IXYS [IXYS Corporation]

Site Internet	http://www.ixys.com

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INTEGRATED CIRCUITS DIVISION

DS-CPC5903-R02

www.ixysic.com

1

Features

• Bidirectionally Buffers I2C SDA Signal

• Extends and Isolates I2C Interfaces

• Standard-mode and Fast-mode I2C

Side B Fast-mode Compatible VDDB > 4.5V

• Operates on 2.7V to 5.5V

• Voltage Level Translation

• Slew-Limited Drivers Reduce EMI

• Powerdown to Hi-Z Does Not Load I2C

• 3750V

rms Galvanic Isolation

• Single 8-pin Surface-Mount Package

Applications

• Isolated Control and Signal Monitoring

• Power-over-Ethernet

• Power Supply High Side Interface

• I2C Bus Length Extenders

• I2C Logic Level Translation

Approvals

• UL 1577 Certified Component: File E76270

• EN/IEC 60950 Certified Component:

TUV Certificate: B 11 10 49410 007

Description

The CPC5903 is a dual, optically isolated, logic-bus

repeater. It isolates two open-drain logic signals while

providing 3750Vrms of galvanic isolation. When the

two sides are powered by different supply voltages, it

also functions as a logic level translator for levels as

low as 2.7V or as high as 5.5V. Because the CPC5903

provides an isolated bidirectional buffer for the I2C

data signal and a unidirectional buffer for the I2C clock

signal, it is best suited for applications where clock

stretching is not required. This configuration also

requires the I2C bus master to be on the Side A bus.

Unlike transformer or capacitive isolators, optical

isolation passes DC signals and does not require

continuous clocking to ensure the proper state is

maintained. The CPC5903 always returns the buffered

signals to their proper state after transient

interruptions on either side.

Ordering Information

Figure 1. CPC5903 Functional Block Diagram

e3

Pb

Part

Description

CPC5903G

8-Pin DIP (50 / Tube)

CPC5903GS

8-Pin Surface Mount (50 / Tube)

CPC5903GSTR

8-Pin Surface Mount (1000 / Reel)

V

DDA

V

DDB

V

DDA

B

V

DDB

OB

LED

V

DDA

IA

V

DDA

A

V

DDB

B

A

GND

A

V

DDA

LED

V

DDA

IOA

V

DDB

Q

D

CLR

B

V

DDB

LED

V

DDB

IOB

B

GND

B

1

2

3

45

6

7

8

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