Overview
The TCA6416A, produced by Texas Instruments, is a 16-bit low-voltage I2C and SMBus I/O expander designed to provide additional general-purpose parallel input/output (I/O) expansion for systems using the two-line bidirectional I2C bus or SMBus protocol. This device is particularly useful in scenarios where additional I/Os are required for components such as switches, sensors, push-buttons, LEDs, and fans. The TCA6416A operates with a power supply voltage range of 1.65 V to 5.5 V on both the I2C bus side (VCCI) and the P-port side (VCCP), making it versatile for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Power-Supply Voltage Range | 1.65 V to 5.5 V (VCCI and VCCP) |
| I2C Bus Frequency | 100 kHz (Standard-mode), 400 kHz (Fast-mode) |
| Number of I/O Bits | 16 bits |
| Standby Current Consumption | 3 μA |
| I/O Port Tolerance | 5-V Tolerant I/O ports |
| Interrupt Output | Open-drain active-low interrupt output (INT) |
| Reset Input | Active-low reset input (RESET) |
| Package Options | TSSOP (24-pin), WQFN (24-pin), Microstar BGA™ Junior (24-pin) |
| Operating Temperature Range | -40°C to 85°C |
| ESD Protection | 2000-V Human-body model, 200-V Machine model, 1000-V Charged-device model |
Key Features
- I2C to parallel port expander
- Bidirectional voltage-level translation and GPIO expansion between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C Bus and P-ports
- Low standby current consumption of 3 μA
- 5-V Tolerant I/O ports
- 400-kHz Fast I2C bus
- Hardware address pin allows two TCA6416A devices on the same I2C/SMBus bus
- Active-low reset input (RESET) and open-drain active-low interrupt output (INT)
- Input/output configuration register and polarity inversion register
- Internal power-on reset and power-up with all channels configured as inputs
- No glitch on power up and noise filter on SCL and SDA inputs
- Latched outputs with high-current drive capability for directly driving LEDs
- Latch-up performance exceeds 100 mA Per JESD 78, class II
- ESD Protection exceeds JESD 22 standards
Applications
- Servers
- Routers and telecom switching equipment
- Personal computers
- Personal electronics (e.g., gaming consoles)
- Industrial automation
- Products with GPIO-limited processors
Q & A
- What is the operating power-supply voltage range of the TCA6416A?
The operating power-supply voltage range is from 1.65 V to 5.5 V on both the I2C bus side (VCCI) and the P-port side (VCCP).
- What are the supported I2C bus frequencies for the TCA6416A?
The device supports both 100 kHz (Standard-mode) and 400 kHz (Fast-mode) clock frequencies.
- How many I/O bits does the TCA6416A provide?
The TCA6416A provides 16 bits of general-purpose parallel input/output (I/O) expansion.
- What is the standby current consumption of the TCA6416A?
The standby current consumption is 3 μA.
- Does the TCA6416A support voltage-level translation?
Yes, it allows bidirectional voltage-level translation and GPIO expansion between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C Bus and P-ports.
- What types of packages are available for the TCA6416A?
The device is available in TSSOP (24-pin), WQFN (24-pin), and Microstar BGA™ Junior (24-pin) packages.
- What is the operating temperature range of the TCA6416A?
The operating temperature range is from -40°C to 85°C..
- Does the TCA6416A have ESD protection?
Yes, it exceeds JESD 22 standards with 2000-V Human-body model, 200-V Machine model, and 1000-V Charged-device model protection.
- Can multiple TCA6416A devices be used on the same I2C/SMBus bus?
Yes, the hardware address pin allows two TCA6416A devices on the same I2C/SMBus bus.
- What is the purpose of the interrupt output and reset input on the TCA6416A?
The interrupt output (INT) is an open-drain active-low output, and the reset input (RESET) is an active-low input, which are used for interrupt and reset functions respectively.
