Document
TCA1116
www.ti.com
LOW VOLTAGE 16-BIT I2C I/O EXPANDER WITH INTERRUPT AND RESET
Check for Samples: TCA1116
SCPS229 – SEPTEMBER 2011
FEATURES
1
• 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 3 μA Max
• 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 100 mA Per
JESD 78, Class II • ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A) – 1000-V Charged-Device Model (C101)
PW PACKAGE (TOP VIEW)
RTW PACKAGE (TOP VIEW)
RESET A1 INT VCC SDA SCL
INT A1 RESET P00 P01 P02 P03 P04 P05 P06 P07 GND
1 2 3 4 5 6 7 8 9 10 11 12
24 VCC 23 SDA 22 SCL 21 A0 20 P17 19 P16 18 P15 17 P14 16 P13 15 P12 14 P11 13 P10
24 23 22 21 20 19
P00 P01 P02 P03 P04 P05
1 2 3 4 5 6
Exposed Center
Pad
18 A0 17 P17 16 P16 15 P15 14 P14 13 P13
7 8 9 10 11 12
P06 P07 GND P10 P11 P12
The exposed center pad, if used, must be connected as a secondary ground or left electrically open.
DESCRIPTION
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.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated
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 prop.