TCA6408_09 datasheet(13/31 Pages) TI

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Electrical Characteristics

TCA6408

LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER

WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007

over recommended operating free-air temperature range, V

CCI = 1.65 V to 5.5 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

VCCP

MIN

TYP(1)

MAX

UNIT

VIK

Input diode clamp voltage II = –18 mA

1.65 V to 5.5 V

–1.2

VPOR

Power-on reset voltage(2)

VI = VCCP or GND, IO = 0

1.65 V to 5.5 V

1.4

1.65 V

1.2

2.3 V

1.8

IOH = –8 mA

3 V

2.6

4.5 V

4.1

P port high-level output

VOH

voltage

1.65 V

1.1

2.3 V

1.7

IOH = –10 mA

3 V

2.5

4.5 V

4.0

1.65 V

0.45

2.3 V

0.25

IOL = 8 mA

3 V

0.25

4.5 V

0.2

P port low-level output

VOL

voltage

1.65 V

0.6

2.3 V

0.3

IOL = 10 mA

3 V

0.25

4.5 V

0.2

SDA

VOL = 0.4 V

1.65 V to 5.5 V

IOL

INT

VOL = 0.4 V

1.65 V to 5.5 V

SCL, SDA

VI = VCCI or GND

±0.1

1.65 V to 5.5 V

µA

ADDR, RESET

VI = VCCP or GND

±0.1

IIH

P port

VI = VCCP

µA

1.65 V to 5.5 V

IIL

P port

VI = GND

µA

VI on SDA = VCCI or GND,

3.6 V to 5.5 V

SDA,

VI on P port, ADDR and

2.3 V to 3.6 V

6.5

Operating

P Port,

RESET = VCCP or GND,

mode

ADDR,

IO = 0, I/O = inputs,

1.65 V to 2.3 V

RESET

fSCL = 400 kHz

VI on SDA = VCCI or GND,

3.6 V to 5.5 V

2.5

SDA,

VI on P port, ADDR and

2.3 V to 3.6 V

1.6

3.8

Operating

P Port,

ICC

RESET = VCCP or GND,

mode

ADDR,

µA

(ICCI + ICCP)

IO = 0, I/O = inputs,

1.65 V to 2.3 V

2.3

RESET

fSCL = 100 kHz

VI on SCL and SDA = VCCI or

3.6 V to 5.5 V

0.2

SCL, SDA,

GND,

2.3 V to 3.6 V

0.1

0.6

Standby

P Port,

VI on P Port, ADDR and

mode

ADDR,

RESET = VCCP or GND,

1.65 V to 2.3 V

0.1

0.4

RESET

IO = 0, I/O = inputs,

fSCL = 0

One input at VCCI – 0.6 V,

∆I

CCI

SCL, SDA

1.65 V to 5.5 V

µA

Additional

Other inputs at VCCI or GND

current in

P Port,

Standby

One input at VCCP – 0.6 V,

∆ I

CCP

ADDR,

1.65 V to 5.5 V

µA

mode

Other inputs at VCCP or GND

RESET

SCL

VI = VCCI or GND

1.65 V to 5.5 V

SDA

VIO = VCCI or GND

Cio

1.65 V to 5.5 V

P Port

VIO = VCCP or GND

7.5

8.5

(1)

All typical values are at nominal supply voltage (1.8-V, 2.5-V, 3.3-V, or 5-V VCC) and TA = 25°C.

(2)

When power (from 0 V) is applied to VCCP, an internal power-on reset holds the TCA6408 in a reset condition until VCCP has reached

VPOR. At that time, the reset condition is released, and the TCA6408 registers and I2C/SMBus state machine initialize to their default

states. After that, VCCP must be lowered to below 0.2 V and back up to the operating voltage for a power-reset cycle.

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