TCA1116 - 低电压 16 位 I2C 和 SMBus 低功耗 I/O 扩展器，TCA1116

TCA1116是TI德州仪器公司的一款I2C特殊功能产品，TCA1116是低电压 16 位 I2C 和 SMBus 低功耗 I/O 扩展器，TCA1116，本站介绍了TCA1116的封装应用图解、特点和优点、功能等，并给出了与TCA1116相关的TI元器件型号供参考。

TCA1116 - 低电压 16 位 I2C 和 SMBus 低功耗 I/O 扩展器，TCA1116 - I2C特殊功能 - I2C - 德州仪器

产品描述

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)]. Two hardware pins (A0 and A1) are used to program and vary the fixed I2C address and allow up to four devices to share the same I2C bus. The TCA1116 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active-high or active-low operation) registers. At power-on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

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.

产品特性

I2C to Parallel Port Expander
Supports partial power down i.e. SDA and SCL are 5V tolerant (<1uA leakage) even when Vcc=0
Supports 1.8V I2C operation
Open-Drain Active-Low Interrupt Output
Active-Low Reset Input
I/O Ports are 5V tolerant
Low Standby-Current Consumption of 3µAMax
400-kHz Fast I2C Bus support
Polarity Inversion Register
Configurable with up to four different I2C addresses using hardware pins
Directly drive LEDs using high current push pull outputs
Latch-Up Performance Exceeds 100mA Per JESD78, ClassII
ESD Protection Exceeds JESD22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

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