Overview
The TCA9617BDGKR, produced by Texas Instruments, is a BiCMOS dual bidirectional buffer designed for I2C bus and SMBus systems. This device provides bidirectional voltage-level translation between low voltages (down to 0.8V) and higher voltages (2.2V to 5.5V), making it suitable for mixed-mode applications. It enables the extension of I2C and similar bus systems without performance degradation during level shifting. The TCA9617BDGKR supports standard mode, fast mode (400kHz), and fast mode+ (1MHz) I2C operation, and it is packaged in an 8-pin VSSOP (DGK) package.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | VSSOP (DGK), 8 pins |
| Operating Temperature Range | -40°C to 85°C |
| Operating Supply Voltage Range (A-side) | 0.8V to 5.5V |
| Operating Supply Voltage Range (B-side) | 2.2V to 5.5V |
| Maximum Clock Frequency | 1 MHz |
| I2C Bus Capacitance Supported | Up to 550 pF per bus |
| ESD Protection | 4000V Human-body model, 1500V Charged-device model |
| RoHS Compliance | Yes, compliant with 2011/65/EU and 2015/863/EU |
Key Features
- Two-channel bidirectional I2C buffer
- Support for standard mode, fast mode (400kHz), and fast mode+ (1MHz) I2C operation
- Bidirectional voltage-level translation between 0.8V and 5.5V and 2.2V to 5.5V
- Active-high repeater-enable input
- Open-drain I2C I/O
- 5.5V tolerant I2C and enable input support
- Lockup-free operation
- Powered-off high-impedance I2C bus pins
- Support for clock stretching and multiple controller arbitration across the device
- Latch-up performance exceeds 100mA per JESD 78, class II
Applications
The TCA9617BDGKR is ideal for various applications where I2C bus extension and voltage-level translation are necessary. These include:
- Systems with multiple I2C targets and/or long PCB traces
- Mixed-mode applications requiring voltage translation between different voltage levels
- Separation of two halves of a bus for voltage and capacitance reasons
- Applications requiring clock stretching and multiple controller arbitration
Q & A
- What is the primary function of the TCA9617BDGKR?
The primary function of the TCA9617BDGKR is to act as a bidirectional I2C buffer and voltage-level translator for I2C and SMBus systems.
- What are the supported I2C operation modes for the TCA9617BDGKR?
The device supports standard mode, fast mode (400kHz), and fast mode+ (1MHz) I2C operation.
- What is the operating supply voltage range for the A-side and B-side of the TCA9617BDGKR?
The A-side operates from 0.8V to 5.5V, and the B-side operates from 2.2V to 5.5V.
- What is the maximum clock frequency supported by the TCA9617BDGKR?
The maximum clock frequency supported is 1 MHz.
- Does the TCA9617BDGKR support clock stretching and multiple controller arbitration?
Yes, it supports clock stretching and multiple controller arbitration across the device.
- What is the ESD protection level of the TCA9617BDGKR?
The device has ESD protection exceeding 4000V Human-body model and 1500V Charged-device model.
- Is the TCA9617BDGKR RoHS compliant?
Yes, it is compliant with 2011/65/EU and 2015/863/EU RoHS regulations.
- What is the package type and pin count of the TCA9617BDGKR?
The device is packaged in an 8-pin VSSOP (DGK) package.
- What is the operating temperature range of the TCA9617BDGKR?
The operating temperature range is -40°C to 85°C.
- Can multiple TCA9617BDGKR devices be connected in series?
Yes, multiple devices can be connected in series without buildup in offset voltage, only considering time-of-flight delays.
