TCA1116 Datasheet, PDF (2/12 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C I/O EXPANDER WITH INTERRUPT AND RESET

TCA1116
SCPS229 – SEPTEMBER 2011
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DESCRIPTION CONTINUED
The system master can reset the TCA1116 in the event of a time-out or other improper operation by asserting a
low in the RESET input. The power-on reset puts the registers in their default state and initializes the I²C/SMBus
state machine. Asserting RESET causes the same reset/initialization to occur without depowering the part.
The TCA1116 open-drain interrupt (INT) output is activated when any input state differs from its corresponding
Input Port register state and is used to indicate to the system master that an input state has changed.
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the
remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via
the I²C bus. Thus, the TCA1116 can remain a simple slave device.
The device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low
current consumption.
T_A
–40°C to 85°C
TSSOP – PW
QFN – RTW
ORDERING INFORMATION
PACKAGE^{(1) (2)}
ORDERABLE PART NUMBER
Reel of 2000
TCA1116PWR
Reel of 3000
TCA1116RTWR
TOP-SIDE MARKING
RL116
RL116
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
2
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