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| TCA7408 Datasheet, PDF (13/25 Pages) Texas Instruments – Low-Voltage 8-Bit I2C and SMBus I/O Expander with Interrupt Output, RESET, I/ODirection Registers, and Programmable Pull-up/Pull-down | |||
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TCA7408
SCPS235 â NOVEMBER 2011
ELECTRICAL CHARACTERISTICS
PARAMETER
TEST CONDITIONS
VIK
VPOR
Input diode clamp voltage
Power-on reset voltage(1)
II = â18 mA
VI = VCCP or GND, IO = 0
IOH = â6 mA
VOH
GPIO-port high-level output voltage
IOH = â10 mA
IOL = 6 mA
VOL
GPIO-port low-level output voltage
IOL = 10 mA
SDA (2)
IOL
INT
II
SCL, SDA, RESET, ADDR
IIH
GPIO port
IIL
VOL = 0.4 V
VI = VCCI or GND
VI = VCCP or GND
VI = VCCP
VI = GND
VCCI
1.65 V to 5.5 V
1.65 V to 3.6 V
1.65 V
2.3 V
3V
1.65 V
2.3 V
3V
1.65 V
2.3 V
3V
1.65 V
2.3 V
3V
1.65 V to 5.5 V
2.3 to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
VCCP
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V
2.3 V
3V
1.65 V
2.3 V
3V
1.65 V
2.3 V
3V
1.65 V
2.3 V
3V
1.65 V to 3.6 V
2.3 to 3.6 V
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V to 5.5 V
1.65 V to 3.6 V
MIN TYP MAX UNIT
â1.2
V
1 1.4
V
1.2
1.8
V
2.6
1.1
1.7
V
2.5
0.45
0.25
V
0.25
0.6
0.3
V
0.25
10
20
mA
3
±0.1
μA
±0.1
1
μA
1
(1) When power (from 0 V) is applied to VCCP, an internal power-on reset holds the TCA7408 in a reset condition until VCCP has reached
VPOR. At that time, the reset condition is released, and the TCA7408 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.
(2) IOL for SDA is specified for standard mode, fast mode, and fast mode plus capability (at 2.3 V).
ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER
TEST CONDITIONS
ICC
(ICCI + ICCP)
ÎICCI
ÎICCP
Ci
Cio
RPU
RPD
Standard Mode
Operating mode
SDA, GPIO port,
ADDR, RESET
Fast Mode
Operating mode
SDA, GPIO port,
ADDR, RESET
Fast Mode+
Operating mode
SDA, GPIO port,
ADDR, RESET
Standby mode
SCL, SDA, GPIO port,
ADDR, RESET
Additional current
in standby mode
SCL, SDA, RESET
GPIO port, ADDR
SCL
SDA
GPIO port
Pull up resistor
Pull down resistor
VI on SDA, ADDR, and RESET= VCCI
or GND, VI on GPIO port = VCCP or
GND, IO = 0, I/O = inputs, fSCL = 100 kHz
VI on SDA, ADDR, and RESET= VCCI or
GND, VI on GPIO port = VCCP or
GND, IO = 0, I/O = inputs,
fSCL = 400 kHz
VI on SDA, ADDR, and RESET= VCCI or
GND, VI on GPIO port = VCCP or
GND, IO = 0, I/O = inputs,
fSCL = 1MHz
VI on SCL, SDA and RESET = VCCI or
GND, VI on GPIO port and ADDR = VCCI
or GND, IO = 0, I/O = inputs, fSCL = 0
One input at VCCI â 0.6 V,
Other inputs at VCCI or GND
One input at VCCP â 0.6 V,
Other inputs at VCCP or GND
VI = VCCI or GND
VIO = VCCI or GND
VIO = VCCP or GND
VI = GND
VI = VCCP
VCCI
3.6 V to 5.5 V
2.3 V to 3.6 V
1.65 V to 2.3 V
3.6 V to 5.5 V
2.3 V to 3.6 V
1.65 V to 2.3 V
3.6 V to 5.5 V
2.3 V to 3.6 V
3.6 V to 5.5 V
2.3 V to 3.6 V
1.65 V to 2.3 V
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
VCCP
3.6V
2.3 V to 3.6 V
1.65 V to 2.3 V
3.6 V
2.3 V to 3.6 V
1.65 V to 2.3 V
3.6 V
2.3 V to 3.6 V
3.6 V
2.3 V to 3.6 V
1.65 V to 2.3 V
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V to 3.6 V
(1) All typical values are at nominal supply voltage (1.8V, 2.5V, 3.3V, or 5V VCC) and TA = 25°C.
MIN TYP(1) MAX UNIT
TBD TBD
TBD TBD μA
TBD TBD
TBD TBD
TBD TBD μA
TBD TBD
TBD TBD
μA
TBD TBD
TBD TBD
TBD TBD μA
TBD TBD
TBD μA
TBD μA
6 TBD pF
7 TBD
pF
7.5 TBD
100
kΩ
100
kΩ
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s) :TCA7408
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