Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsInterface ICsInterface IC - I/O extensions POR I²C, SMBus 400 kHz QFN 16

FEATURES

ADDR

CCP

SDA

RESET

RSV PACKAGE

(TOP VIEW)

121

112

103

SCL

INT

GND

PW PACKAGE

(TOP VIEW)

CCI

ADDR

RESET

GND

CCP

SDA

SCL

INT

SCL

RGT PACKAGE

(TOP VIEW)

ADDR

CCI

CCP

1 12

INT

GND

RESET

If used, the exposed center pad

ust be connected as a secondary

ground or left electrically open.

Exposed

Center

Pad

TCA6408A

www.ti.com

.............................................................................................................................................................SCPS192C–APRIL2009–REVISEDJULY2009

LOW-VOLTAGE8-BITI

CANDSMBusI/OEXPANDER

WITHINTERRUPTOUTPUT,RESET,ANDCONFIGURATIONREGISTERS

•OperatingPower-SupplyVoltageRangeof•5-VTolerantI/OPorts

1.65Vto5.5V

•Active-LowReset(RESET)Input

•AllowsBidirectionalVoltage-LevelTranslation

•Open-DrainActive-LowInterrupt(INT)Output

andGPIOExpansionBetween

•400-kHzFastI

CBus

–1.8-VSCL/SDAand1.8-V,2.5-V,

•Input/OutputConfigurationRegister

3.3-V,or5-VPPort

•PolarityInversionRegister

–2.5-VSCL/SDAand1.8-V,2.5-V,

•InternalPower-OnReset

3.3-V,or5-VPPort

•PowerUpWithAllChannelsConfiguredas

–3.3-VSCL/SDAand1.8-V,2.5-V,

Inputs

3.3-V,or5-VPPort

•NoGlitchOnPowerUp

–5-VSCL/SDAand1.8-V,2.5-V,

•NoiseFilteronSCL/SDAInputs

3.3-V,or5-VPPort

•LatchedOutputsWithHigh-CurrentDrive

•I

CtoParallelPortExpander

MaximumCapabilityforDirectlyDrivingLEDs

•LowStandbyCurrentConsumptionof1µA

•Latch-UpPerformanceExceeds100mAPer

•Schmitt-TriggerActionAllowsSlowInput

JESD78,ClassII

TransitionandBetterSwitchingNoise

•ESDProtectionExceedsJESD22

ImmunityattheSCLandSDAInputs

–2000-VHuman-BodyModel(A114-A)

–V

hys

=0.18VTypat1.8V

–1000-VCharged-DeviceModel(C101)

–V

hys

=0.25VTypat2.5V

–V

hys

=0.33VTypat3.3V

–V

hys

=0.5VTypat5V

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Summary of content (37 pages)

PAGE 1
TCA6408A www.ti.com.............................................................................................................................................................
PAGE 2
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com DESCRIPTION/ORDERING INFORMATION This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].
PAGE 3
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 TERMINAL FUNCTIONS TERMINAL NO. DESCRIPTION TSSOP (PW) µQFN (RSV) QFN (RGT) NAME 1 15 15 VCCI 2 16 16 ADDR Address input. Connect directly to VCCP or ground. Active-low reset input. Connect to VCCI through a pullup resistor, if no active connection is used.
PAGE 4
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com Voltage Translation Table 1 shows how to set up VCC levels for the necessary voltage translation between the I2C bus and the TCA6408A. Table 1. Voltage Translation 4 VCCI (SCL AND SDA OF I2C MASTER) (V) VCCP (P PORT) (V) 1.8 1.8 1.8 2.5 1.8 3.3 1.8 5 2.5 1.8 2.5 2.5 2.5 3.
PAGE 5
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 LOGIC DIAGRAM (POSITIVE LOGIC) INT ADDR SCL SDA VCCI VCCP RESET GND 13 Interrupt Logic LP Filter 2 14 15 Input Filter 2 I C Bus Control 1 8 Bits I/O Port P7–P0 Write Pulse Read Pulse 16 3 Shift Register Power-On Reset 8 A. All pin numbers shown are for the PW package.
PAGE 6
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.
PAGE 7
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 A Stop condition, a low-to-high transition on the SDA input/output while the SCL input is high, is sent by the master (see Figure 1). Any number of data bytes can be transferred from the transmitter to receiver between the Start and the Stop conditions.
PAGE 8
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com Interface Definition BIT BYTE 7 (MSB) 6 5 4 3 2 1 0 (LSB) I2C slave address L H L L L L ADDR R/W I/O data bus P7 P6 P5 P4 P3 P2 P1 P0 Device Address The address of the TCA6408A is shown in Figure 4.
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TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 Register Descriptions The Input Port Register (register 0) reflects the incoming logic levels of the pins, regardless of whether the pin is defined as an input or an output by the Configuration Register. They act only on read operation. Writes to this register have no effect.
PAGE 10
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com Interrupt (INT)Output An interrupt is generated by a rising or falling edge of the port inputs in the input mode. After time tiv, the signal INT is valid.
PAGE 11
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 Reads The bus master first must send the TCA6408A address with the LSB set to a logic 0 (see Figure 4 for device address). The command byte is sent after the address and determines which register is accessed.
PAGE 12
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCCI Supply voltage range –0.5 6.5 UNIT V VCCP Supply voltage range –0.5 6.5 V (2) –0.5 6.5 V –0.5 6.
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TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range, VCCI = 1.65 V to 5.5 V (unless otherwise noted) PARAMETER TEST CONDITIONS VCCP MIN –1.2 VIK Input diode clamp voltage II = –18 mA 1.65 V to 5.5 V VPOR Power-on reset voltage (2) 1.65 V to 5.
PAGE 14
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com ELECTRICAL CHARACTERISTICS (continued) over recommended operating free-air temperature range, VCCI = 1.65 V to 5.
PAGE 15
TCA6408A www.ti.com.............................................................................................................................................................
PAGE 16
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com TYPICAL CHARACTERISTICS TA = 25°C (unless otherwise noted) SUPPLY CURRENT vs TEMPERATURE STANDBY SUPPLY CURRENT vs TEMPERATURE 22 14 12 10 VCC = 3.3 V 8 VCC = 2.5 V 6 4 VCC = 1.8 V 2 VCC = 1.65 V -15 10 35 VCC = 5.5 V 1600 VCC = 5 V 1400 1200 600 VCC = 1.8 V 400 VCC = 1.
PAGE 17
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 TYPICAL CHARACTERISTICS (continued) TA = 25°C (unless otherwise noted) I/O LOW VOLTAGE vs TEMPERATURE I/O SOURCE CURRENT vs OUTPUT HIGH VOLTAGE 200 150 VCC = 5 V, ISINK = 10 mA 100 VCC = 5 V, ISINK = 1 mA -15 10 35 60 15 TA = 25°C 10 TA = 85°C 5 0 85 0.1 0.
PAGE 18
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.
PAGE 19
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 PARAMETER MEASUREMENT INFORMATION (continued) VCCI RL = 4.
PAGE 20
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) Pn 500 W DUT 2 ´ VCCP CL = 50 pF (see Note A) 500 W P-PORT LOAD CONFIGURATION SCL P0 A P3 0.7 ´ VCCP 0.3 ´ VCCI Slave ACK SDA tpv (see Note B) Pn Unstable Data Last Stable Bit WRITE MODE (R/W = 0) 0.7 ´ VCCI SCL P0 A tps P3 0.
PAGE 21
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 PARAMETER MEASUREMENT INFORMATION (continued) VCCI RL = 1 kW Pn SDA 500 W DUT DUT CL = 50 pF (see Note A) SDA LOAD CONFIGURATION 2 ´ VCCP CL = 50 pF (see Note A) 500 W P-PORT LOAD CONFIGURATION Start SCL ACK or Read Cycle SDA 0.
PAGE 22
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com APPLICATION INFORMATION Figure 14 shows an application in which the TCA6408A can be used. VCCI VCCP VCCI (1.8 V) 14 SCL Master Controller SDA 15 13 INT GND 16 1 10 kW (´ 4) VCC 3 RESET 100 kW (´ 3) VCCI VCCP SCL P0 SDA ALARM (see Note D) Subsystem 1 (e.g.
PAGE 23
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 Minimizing ICC When I/O Is Used to Control LEDs When the I/Os are used to control LEDs, normally they are connected to VCC through a resistor as shown in Figure 14. The LED acts as a diode so when the LED is off, the I/O VIN is about 1.2 V less than VCC.
PAGE 24
TCA6408A SCPS192C – APRIL 2009– REVISED JULY 2009............................................................................................................................................................. www.ti.com Power-On Reset Requirements In the event of a glitch or data corruption, TCA6408A can be reset to its default conditions by using the power-on reset feature. Power-on reset requires that the device go through a power cycle to be completely reset.
PAGE 25
TCA6408A www.ti.com............................................................................................................................................................. SCPS192C – APRIL 2009– REVISED JULY 2009 Glitches in the power supply can also affect the power-on reset performance of this device. The glitch width (tGW) and height (tGH) are dependent on each other. The bypass capacitance, source impedance, and device impedance are factors that affect power-on reset performance.
PAGE 26
PACKAGE OPTION ADDENDUM www.ti.
PAGE 27
PACKAGE OPTION ADDENDUM www.ti.com 20-May-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
PAGE 28
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device TCA6408APWR 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 TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 TCA6408ARGTR QFN RGT 16 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TCA6408ARSVR UQFN RSV 16 3000 177.8 12.4 2.0 2.8 0.7 4.0 12.
PAGE 29
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TCA6408APWR TSSOP PW 16 2000 367.0 367.0 35.0 TCA6408ARGTR QFN RGT 16 3000 367.0 367.0 35.0 TCA6408ARSVR UQFN RSV 16 3000 202.0 201.0 28.
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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.