PCA9511ADR2G Просмотр технического описания (PDF) - ON Semiconductor

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PCA9511ADR2G

Hot Swappable I2C-Bus and SMBus Bus Buffer

ON Semiconductor 

PCA9511A

Hot Swappable I2C-Bus and

SMBus Bus Buffer

The PCA9511A is a hot swappable I2C−bus and SMBus buffer that

allows I/O card insertion into a live backplane without corrupting the

data and clock buses. Control circuitry prevents the backplane from

being connected to the card until a stop command or bus idle occurs on

the backplane without bus contention on the card. When the

connection is made, the PCA9511A provides bidirectional buffering,

keeping the backplane and card capacitances isolated.

The PCA9511A rise time accelerator circuitry allows the use of

weaker DC pull−up currents while still meeting rise time

requirements. The PCA9511A incorporates a digital ENABLE input

pin, which enables the device when asserted HIGH and forces the

device into a low current mode when asserted LOW, and an

open−drain READY output pin, which indicates that the backplane

and card sides are connected together (HIGH) or not (LOW).

During insertion, the PCA9511A SDA and SCL lines are

precharged to 1 V to minimize the current required to charge the

parasitic capacitance of the chip.

Features

• Bidirectional Buffer for SDA and SCL Lines Increases Fan−Out and

Prevents SDA and SCL Corruption During Live Board Insertion and

Removal from Multipoint Backplane Systems

• DV/Dt Rise Time Accelerators on all SDA and SCL lines

• Active HIGH ENABLE Input

• Active HIGH READY Open−Drain Output

• High−Impedance SDA and SCL for VCC = 0 V

• 1 V precharge on all SDA and SCL Lines

• Supports Clock Stretching and Multiple Master

arbitration/Synchronization

• VCC Operating Range: 2.7 V to 5.5 V

• I2C and SMBus SCL Clock Frequency up to 1 MHz

• Alternate Features for

PCA9510A/PCA9512A/PCA9513A/PCA9514A

• Available in: Micro8, SOIC−8

• ESD Performance: 8000 V HBM, 600 V MM, 2000V CDM

• These are Pb−Free Devices

Applications

• cPCI, VME, AdvancedTCA cards and other multipoint backplane

cards that are required to be inserted or removed from an operating

system

http://onsemi.com

MARKING

DIAGRAMS

Micro8]

DM SUFFIX

CASE 846A

8

9511

AYWG

G

1

8

1

SOIC−8

CASE 751

8

9511

AYWW

G

1

A = Assembly Location

L = Wafer Lot

M = Date Code

Y = Year

W = Work Week

G = Pb−Free Package

(Note: Microdot may be in either location)

ORDERING INFORMATION

See detailed ordering and shipping information on page 15 of

this data sheet.

© Semiconductor Components Industries, LLC, 2013

1

August, 2013 − Rev. 0

Publication Order Number:

PCA9511A/D

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