Datasheet

TCA7408
www.ti.com SCPS235B –NOVEMBER 2011–REVISED MARCH 2013
DEVICE INFORMATION
TOP THROUGH VIEW
1 2 3 4
A GND GPIO7 GPIO6 GPIO5
B V
CCI
V
CCP
ADDR GPIO4
C SDA INT RESET GPIO3
D SCL GPIO0 GPIO1 GPIO2
PIN FUNCTIONS
µCSP (ZSZ)
DESCRIPTION
PIN NO. NAME
B1 VCCI Supply voltage of I
2
C bus. Connect directly to the VCCI of the external I
2
C master. Provides voltage level
translation.
B3 ADDR Address input. Connect directly to V
CCI
or ground.
C3 RESET Active-low reset input. Connect to V
CCI
through a pull-up resistor, if no active connection is used.
D2 GPIO0 GPIO-port input/output (push-pull design structure). At power on, GPIO0 is configured as an input.
D3 GPIO1 GPIO-port input/output (push-pull design structure). At power on, GPIO1 is configured as an input.
D4 GPIO2 GPIO-port input/output (push-pull design structure). At power on, GPIO2 is configured as an input.
C4 GPIO3 GPIO-port input/output (push-pull design structure). At power on, GPIO3 is configured as an input.
A1 GND Ground
B4 GPIO4 GPIO-port input/output (push-pull design structure). At power on, GPIO4 is configured as an input.
A4 GPIO5 GPIO-port input/output (push-pull design structure). At power on, GPIO5 is configured as an input.
A3 GPIO6 GPIO-port input/output (push-pull design structure). At power on, GPIO6 is configured as an input.
A2 GPIO7 GPIO-port input/output (push-pull design structure). At power on, GPIO7 is configured as an input.
C2 INT Active-low interrupt output. Connect to V
CCI
through a pull-up resistor.
D1 SCL Serial clock bus. Connect to V
CCI
through a pull-up resistor.
C1 SDA Serial data bus. Connect to V
CCI
through a pull-up resistor.
B2 VCCP Supply voltage of TCA7408 for GPIO-port
VOLTAGE TRANSLATION
V
CCI
V
CCP
(SCL AND SDA OF I
2
C MASTER) (GPIO-PORT)
(V) (V)
1.8 1.8
1.8 2.5
1.8 3.3
2.5 1.8
2.5 2.5
2.5 3.3
3.3 1.8
3.3 2.5
3.3 3.3
5 1.8
5 2.5
5 3.3
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