Datasheet > PD518

PD518

更新时间： 2024-11-18 03:42:51

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德州仪器 - TI		/
页数	文件大小	规格书
20页	490K
描述
EXPANDABLE FIVE-CHANNEL I2C HUB

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数据手册

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PD518 数据手册

PCA9518

EXPANDABLE FIVE-CHANNEL I²C HUB

www.ti.com

SCPS132A–JUNE 2006–REVISED JULY 2007

FEATURES

•

Expandable Five-Channel Bidirectional Buffer

400-kHz Fast I²C Bus

•

Powered-Off High-Impedance I²C Pins

I²C Bus and SMBus Compatible

Operating V_CCRange of 3 V to 3.6 V

5-V Tolerant I²C and Enable Input Pins to

Support Mixed-Mode Signal Operation

Latchup Performance Exceeds 100 mA Per

JESD 78

•

ESD Protection Exceeds JESD 22

•

Active-High Individual Repeater Enable Inputs

Open-Drain Input/Outputs

–

2000-V Human-Body Model (A114-A)

200-V Machine Model (A115-A)

Lockup-Free Operation

1000-V Charged-Device Model (C101)

Supports Arbitration and Clock Stretching

Across the Repeater

•

Supports Multiple Masters

DB, DBQ, DW, OR PW PACKAGE

(TOP VIEW)

EXPSCL1

EXPSCL2

SCL0

EXPSDA2

EXPSDA1

EN4

SDA4

SCL4

SDA0

SCL1

SDA1

EN1

EN3

SCL2

SDA2

GND

SDA3

SCL3

EN2

DESCRIPTION/ORDERING INFORMATION

The PCA9518 is an expandable five-channel bidirectional buffer for I²C and SMBus applications. The I²C

protocol requires a maximum bus capacitance of 400 pF, which is derived from the number of devices on the I²C

bus and the bus length. The PCA9518 overcomes this restriction by separating and buffering the I²C data (SDA)

and clock (SCL) lines into multiple groups of 400-pF segments. Any segment-to-segment transition sees only

one repeater delay. Each PCA9518 can communicate with other PCA9518 hubs through a 4-wire inter-hub

expansion bus. Using multiple PCA9518 parts, any width hub (in multiples of five) can be implemented using the

expansion pins, with only one repeater delay and no functional degradation of the system performance.

ORDERING INFORMATION

T_A

PACKAGE⁽¹⁾⁽²⁾

ORDERABLE PART NUMBER

PCA9518DBR

TOP-SIDE MARKING

PD518

SSOP – DB

Reel of 2000

QSOP – DBQ

Reel of 2500

Tube of 25

PCA9518DBQR

PCA9518DW

PCA9518

–40°C to 85°C

SOIC – DW

PCA9518

PD518

Reel of 2000

Tube of 70

PCA9518DWR

PCA9518PW

TSSOP – PW

Reel of 2000

PCA9518PWR

(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...20

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