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FEATURES

DB,DGV,DW,ORPWPACKAGE

OP VIEW)

A1 SDA

RESET

SCL

SD0

SC0 SC7

SD1 SD7

SC1 SC6

SD2 SD6

SC2 SC5

SD3 SD5

SC3 SC4

GND SD4

241

214

196

169

1510

1411

RGEP

ACKAGE

(TOP VIEW)

24 23 22 21 20

8 9 10 11

RESET

SD4

SC4

SDA

SD3

SC3

GND

SCL

SD5

SD0

SC0

SD1

SC1

SD2

SC2

SC7

SD7

SC6

SD6

SC5

DESCRIPTION/ORDERINGINFORMATION

PCA9548A

8-CHANNELI

CSWITCH

WITHRESET

SCPS143C–OCTOBER2006–REVISEDJUNE2007

•1-of-8BidirectionalTranslatingSwitches•NoGlitchonPowerUp

•I

CBusandSMBusCompatible•SupportsHotInsertion

•Active-LowResetInput•LowStandbyCurrent

•AddressbyThreeHardwareAddressPinsfor•OperatingPower-SupplyVoltageRangeof

UseofuptoEightDevices2.3Vto5.5V

•ChannelSelectionViaI

CBus•5-V-TolerantInputs

•Power-UpWithAllSwitchChannels•400-kHzFastI

CBus

Deselected

•Latch-UpPerformanceExceeds100mAPer

•Lowr

SwitchesJESD78,ClassII

•AllowsVoltage-LevelTranslationBetween•ESDProtectionExceedsJESD22

2.5-V,3.3-V,and5-VBuses

–2000-VHuman-BodyModel(A114-A)

–200-VMachineModel(A115-A)

–1000-VCharged-DeviceModel(C101)

ORDERINGINFORMATION

PACKAGE

(1)(2)

ORDERABLEPARTNUMBERTOP-SIDEMARKING

QFN–RGEReelof3000PCA9548ARGERPD548A

Reelof2000PCA9548ADBR

SSOP–DBPD548A

Reelof250PCA9548ADBT

TVSOP–DGVReelof2000PCA9548ADGVRPD548A

–40°Cto85°C

Reelof2000PCA9548ADWR

SOIC–DWPCA9548A

Tubeof25PCA9548ADW

Reelof2000PCA9548APWR

TSSOP–PWPD548A

Tubeof60PCA9548APW

(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI

websiteatwww.ti.com.

(2)Packagedrawings,standardpackingquantities,thermaldata,symbolization,andPCBdesignguidelinesareavailableat

www.ti.com/sc/package.

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Not Recommended For New Designs

Summary of content (27 pages)

PAGE 1
Not Recommended For New Designs www.ti.com PCA9548A 8-CHANNEL SWITCH WITH RESET I2C SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 FEATURES • • • • 1-of-8 Bidirectional Translating Switches I2C Bus and SMBus Compatible Active-Low Reset Input Address by Three Hardware Address Pins for Use of up to Eight Devices Channel Selection Via I2C Bus Power-Up With All Switch Channels Deselected Low rON Switches Allows Voltage-Level Translation Between 2.5-V, 3.
PAGE 2
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 DESCRIPTION/ORDERING INFORMATION (CONTINUED) The PCA9548A has eight bidirectional translating switches that can be controlled via the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.
PAGE 3
Not Recommended For New Designs www.ti.
PAGE 4
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 TERMINAL FUNCTIONS NO. SOIC (DW), SSOP (DB), TSSOP (PW), AND TVSOP (DGV) QFN (RGE) NAME DESCRIPTION 1 22 A0 Address input 0. Connect directly to VCC or ground. 2 23 A1 Address input 1. Connect directly to VCC or ground. 3 24 RESET 4 1 SD0 Serial data 0. Connect to VCC through a pullup resistor. Active-low reset input.
PAGE 5
Not Recommended For New Designs www.ti.com PCA9548A 8-CHANNEL SWITCH WITH RESET I2C SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 Any number of data bytes can be transferred from the transmitter to receiver between the start and the stop conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before the receiver can send an ACK bit.
PAGE 6
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 Device Address Figure 4 shows the address byte of the PCA9548A. Slave Address 1 1 1 Fixed 0 A2 A1 A0 R/W Hardware Selectable Figure 4.
PAGE 7
Not Recommended For New Designs www.ti.com PCA9548A 8-CHANNEL SWITCH WITH RESET I2C SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 Channel Selection Bits (Read/Write) B7 B6 B5 B4 B3 B2 B1 B0 Channel 0 Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Channel 7 Figure 5.
PAGE 8
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 Power-On Reset When power (from 0 V) is applied to VCC, an internal power-on reset holds the PCA9548A in a reset condition until VCC has reached VPOR. At that point, the reset condition is released and the PCA9548A registers and I2C state machine initialize to their default states. After that, VCC must be lowered to below 0.
PAGE 9
Not Recommended For New Designs www.ti.com PCA9548A 8-CHANNEL SWITCH WITH RESET I2C SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 Slave Address SDA S 1 1 1 0 Control Register A2 A1 A0 Start Condition 0 A B7 B6 B5 B4 B3 B2 B1 B0 R/W ACK From Slave A ACK From Slave P Stop Condition Figure 7. Write to Control Register Reads The bus master first must send the PCA9548A address with the LSB set to a logic 1 (see Figure 4 for device address).
PAGE 10
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 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 Input voltage range (2) –0.
PAGE 11
Not Recommended For New Designs www.ti.com PCA9548A 8-CHANNEL SWITCH WITH RESET I2C SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 Electrical Characteristics VCC = 2.3 V to 3.6 V, over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VPOR Power-on reset voltage (2) TEST CONDITIONS No load, VI = VCC or GND VCC MIN TYP (1) MAX VPOR 1.6 2.1 5V 3.6 4.5 V to 5.5 V Vo(sw) Switch output voltage Vi(sw) = VCC, ISWout = –100 µA 2.6 3.3 V 3 V to 3.6 V IOL VOL = 0.
PAGE 12
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 I2C Interface Timing Requirements over recommended operating free-air temperature range (unless otherwise noted) (see Figure 9) STANDARD MODE I2C BUS MIN MAX 100 FAST MODE I2C BUS UNIT MIN MAX 0 400 fscl I2C clock frequency 0 tsch I2C clock high time 4 0.6 µs tscl I2C clock low time 4.7 1.
PAGE 13
PCA9548A 8-CHANNEL SWITCH WITH RESET Not Recommended For New Designs I2C www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION VCC RL = 1 kΩ DUT SDA CL = 50 pF (see Note A) SDA LOAD CONFIGURATION Three Bytes for Complete Device Programming Address Stop Start Bit 7 Address Condition Condition Bit 6 (MSB) (P) (S) Address Bit 1 tscl R/W Bit 0 (LSB) ACK (A) Data Bit 7 (MSB) Data Bit 0 (LSB) Stop Condition (P) tsch 0.7 × VCC SCL 0.
PAGE 14
PCA9548A 8-CHANNEL I2C SWITCH WITH RESET Not Recommended For New Designs www.ti.com SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION (continued) VCC RL = 1 kΩ DUT SDA CL = 50 pF (see Note A) SDA LOAD CONFIGURATION Start SCL ACK or Read Cycle SDA 0.3 y VCC tRESET RESET VCC/2 tREC tw SDn, SCn 0.3 y VCC tRESET A. CL includes probe and jig capacitance. B.
PAGE 15
Not Recommended For New Designs www.ti.com PCA9548A 8-CHANNEL SWITCH WITH RESET I2C SCPS143C – OCTOBER 2006 – REVISED JUNE 2007 APPLICATION INFORMATION Figure 11 shows an application in which the PCA9548A can be used. VCC = 2.7 V to 5.5 V VCC = 3.3 V VCC = 2.7 V to 5.5 V 24 I2C/SMBus Master SDA SCL RESET 23 22 3 See Note A SDA SD0 SCL SC0 4 Channel 0 5 VCC = 2.7 V to 5.5 V RESET See Note A SD1 6 SC1 7 Channel 1 VCC = 2.7 V to 5.5 V See Note A SD2 SC2 8 Channel 2 9 VCC = 2.7 V to 5.
PAGE 16
PACKAGE OPTION ADDENDUM www.ti.
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.com 9-Oct-2013 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-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) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 8.8 2.5 12.0 16.0 Q1 PCA9548ADBR SSOP DB 24 2000 330.0 16.4 PCA9548ADGVR TVSOP DGV 24 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 PCA9548ADWR SOIC DW 24 2000 330.0 24.4 10.75 15.7 2.7 12.0 24.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) PCA9548ADBR SSOP DB 24 2000 367.0 367.0 38.0 PCA9548ADGVR TVSOP DGV 24 2000 367.0 367.0 35.0 PCA9548ADWR SOIC DW 24 2000 367.0 367.0 45.0 PCA9548APWR TSSOP PW 24 2000 367.0 367.0 38.0 PCA9548ARGER VQFN RGE 24 3000 367.0 367.0 35.
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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.
PAGE 27
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.