The TCA9617B is a
BiCMOS dual bidirectional buffer intended for I2C bus and SMBus systems.
The device provides bidirectional voltage-level translation (up-translation and
down-translation) between low voltages (down to 0.8V) and higher voltages
(2.2V to 5.5V) in mixed-mode applications. This device
enables I2C and similar bus systems to be extended, without degradation
of performance even during level shifting.
The TCA9617B buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, allowing two buses of 550pF to be connected in an I2C application. This device can also be used to separate two halves of a bus for voltage and capacitance.
PIN | DESCRIPTION | |
---|---|---|
NAME | NO. | |
VCCA | 1 | A-side supply voltage (0.8V to 5.5V) |
SCLA | 2 | I2C SCL line, A side. Connect to VCCA through a pull-up resistor. |
SDAA | 3 | I2C SDA line, A side. Connect to VCCA through a pull-up resistor. |
GND | 4 | Supply ground |
EN | 5 | Active-high repeater enable input. Internally connected to VCCB through a weak pull-up resistor. |
SDAB | 6 | I2C SDA line, B side. Connect to VCCB through a pull-up resistor. |
SCLB | 7 | I2C SCL line, B side. Connect to VCCB through a pull-up resistor. |
VCCB | 8 | B-side and device supply voltage (2.2V to 5.5V) |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VCCB | Supply voltage range | –0.5 | 6.5 | V | |
VCCA | Supply voltage range | –0.5 | 6.5 | V | |
VI | Enable input voltage range(2) | –0.5 | 6.5 | V | |
VIO | I2C bus voltage range(2) | –0.5 | 6.5 | V | |
IIK | Input clamp current | VI < 0 | –50 | mA | |
IOK | Output clamp current | VO < 0 | –50 | mA | |
IO | Continuous output current | ±50 | mA | ||
Continuous current through VCC or GND | ±100 | mA | |||
Tstg | Storage temperature | –65 | 150 | °C |