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FEATURES

DB, DBQ, DW, OR PW PACKAGE

(TOP VIEW)

EXPSCL1

EXPSCL2

SCL0

SDA0

SCL1

SDA1

EN1

SCL2

SDA2

GND

EXPSDA2

EXPSDA1

EN4

SDA4

SCL4

EN3

SDA3

SCL3

EN2

DESCRIPTION/ORDERING INFORMATION

PCA9518

EXPANDABLE FIVE-CHANNEL I

C HUB

SCPS132A – JUNE 2006 – REVISED JULY 2007

• Expandable Five-Channel Bidirectional Buffer • Powered-Off High-Impedance I

C Pins

• 400-kHz Fast I

C Bus • I

C Bus and SMBus Compatible

• Operating V

Range of 3 V to 3.6 V • Latchup Performance Exceeds 100 mA Per

JESD 78

• 5-V Tolerant I

C and Enable Input Pins to

Support Mixed-Mode Signal Operation • ESD Protection Exceeds JESD 22

• Active-High Individual Repeater Enable Inputs – 2000-V Human-Body Model (A114-A)

• Open-Drain Input/Outputs – 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

The PCA9518 is an expandable five-channel bidirectional buffer for I

C and SMBus applications. The I

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

bus and the bus length. The PCA9518 overcomes this restriction by separating and buffering the I

C 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

PACKAGE

(1) (2)

ORDERABLE PART NUMBER TOP-SIDE MARKING

SSOP – DB Reel of 2000 PCA9518DBR PD518

QSOP – DBQ Reel of 2500 PCA9518DBQR PCA9518

Tube of 25 PCA9518DW

–40 ° C to 85 ° C SOIC – DW PCA9518

Reel of 2000 PCA9518DWR

Tube of 70 PCA9518PW

TSSOP – PW PD518

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.

Summary of content (24 pages)

PAGE 1
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 Operating VCC Range of 3 V to 3.
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PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 DESCRIPTION (CONTINUED) The device is designed for 3-V to 3.6-V VCC operation, but it has 5-V tolerant I2C and enable (EN) input pins. This feature allows for translation from 3 V to 5 V between a master and slave. The enable pin also can be used to electrically isolate a repeater segment from the I2C bus. This is useful in cases where one segment needs to run at 100 kHz while the rest of the system is at 400 kHz.
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PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 TERMINAL FUNCTIONS SOIC, SSOP, TSSOP, OR QSOP PIN NO. NAME 1 EXPSCL1 Expandable serial clock pin 1. Connect to VCC through a pullup resistor. 2 EXPSCL2 Expandable serial clock pin 2. Connect to VCC through a pullup resistor. DESCRIPTION 3 SCL0 Serial clock bus 0. Connect to VCC through a pullup resistor. 4 SDA0 Serial data bus 0. Connect to VCC through a pullup resistor. 5 SCL1 Serial clock bus 1.
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PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 FUNCTIONAL BLOCK DIAGRAM VCC PCA9518 EXPSCL1 EXPSCL2 SCL0 Buffer SCL1 Buffer SCL2 Buffer Buffer SCL4 Buffer SCL3 Buffer SDA4 Buffer SDA3 Hub Logic EXPSDA1 EXPSDA2 SDA0 SDA1 SDA2 Buffer Hub Logic Buffer Buffer EN1 EN4 EN2 EN3 GND A more detailed view of each buffer in the functional block diagram is shown in Figure 1. To Output Data z In Inc Enable Figure 1.
PAGE 5
www.ti.com PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB SCPS132A – JUNE 2006 – REVISED JULY 2007 Enable EN1–EN4 are active-high enable pins and have internal pullup resistors. Each enable pin, ENn, controls its associated SDAn and SCLn ports. When ENn is low, it isolates its corresponding SDAn and SCLn from the system by blocking the inputs from SDAn and SCLn and disabling the output drivers on the SDAn and SCLn pins.
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PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCC Supply voltage range –0.5 7 V VI Enable input voltage range (2) –0.5 7 V 2 –0.
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PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 Electrical Characteristics over recommended operating free-air temperature range, VCC = 3 V to 3.6 V, GND = 0 V (unless otherwise noted) PARAMETER VIK VOL VOL – VILc MAX UNIT –1.2 V SCLn, SDAn IOL = 0 (2) or 6 mA 3 V to 3.6 V EXPSCL, EXPSDA IOL = 12 mA 3 V to 3.6 V 0.5 Low-level input voltage below low-level output voltage SCL, SDA 3 V to 3.6 V 70 0.52 ±1 3 V to 3.6 V VI = 0.
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PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.
PAGE 9
PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 PARAMETER MEASUREMENT INFORMATION VCC VIN RL (see Note B) VOUT PULSE GENERATOR VCC S1 DUT GND CL (see Note C) RT (see Note A) TEST CIRCUIT FOR OPEN-DRAIN OUTPUT tTHLs S1 VCC tTLHs 0.7 VCC Input SDA 0.7 V CC or SCL 0.3 V CC 0.4 V 0.3 VCC 0.4 V tPHLs EXPSDA1 or EXPSCL1 TEST tPLH/tPHL Effective Stretch 0.5 V CC 0.5 VCC tPLHs EXPSDA2 or EXPSCL2 0.5 V CC tPHLE1s Output SDA or SCL 0.
PAGE 10
PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 APPLICATION INFORMATION Figure 3 shows an application in which the PCA9518 can be used. 3.3 V 5V 5V VCC SDA SCL SUBSYSTEM 5 3.3 V 100 kHz VCC EXPSCL1 SDA2 SCL2 SCL SUBSYSTEM 6 SDA0 3.3 V or 5 V 400 kHz SCL0 SDA SDA0 SCL SCL0 BUS MASTER 400 kHz 3.3 V or 5 V Disabled Not Connected SCL4 SDA2 SDA SCL2 SCL 5V SUBSYSTEM 2 400 kHz SDA3 SDA SCL3 SCL 3.3 V EN1 EN2 EN3 EN4 EN1 SDA4 3.
PAGE 11
PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 APPLICATION INFORMATION (continued) If the bus master in Figure 3 were to write to the slave through the PCA9518, the waveform shown in Figure 4 would be created.
PAGE 12
PCA9518 EXPANDABLE FIVE-CHANNEL I2C HUB www.ti.com SCPS132A – JUNE 2006 – REVISED JULY 2007 APPLICATION INFORMATION (continued) The expansion bus signals shown in Figure 4 are included primarily for timing reference points. All timing on the expansion bus is with respect to 0.5 VCC. EXPSDA1 is driven low whenever any SDA pin falls below 0.3-V VCC and EXPSDA2 is driven low when any pin is ≤0.4 V. EXPSCL1 is driven LOW whenever any SCL pin falls below 0.
PAGE 13
PACKAGE OPTION ADDENDUM www.ti.
PAGE 14
PACKAGE OPTION ADDENDUM www.ti.com 20-May-2013 PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 16-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant PCA9518DBQR SSOP DBQ 20 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 PCA9518DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 PCA9518DBT SSOP DB 20 250 330.0 16.4 8.2 7.5 2.5 12.0 16.
PAGE 16
PACKAGE MATERIALS INFORMATION www.ti.com 16-Aug-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) PCA9518DBQR SSOP DBQ 20 2500 367.0 367.0 38.0 PCA9518DBR SSOP DB 20 2000 367.0 367.0 38.0 PCA9518DBT SSOP DB 20 250 367.0 367.0 38.0 PCA9518DWR SOIC DW 20 2000 367.0 367.0 45.0 PCA9518PWR TSSOP PW 20 2000 367.0 367.0 38.0 PCA9518PWT TSSOP PW 20 250 367.0 367.0 38.
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MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.