The TCA39306 is a dual bidirectional voltage-level translator compatible with I2C, SMBus, and I3C with an enable (EN) input, and is operational from 0.9-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2.
The device allows bidirectional voltage translations between 0.85 V and 5 V, without the use of a direction pin. The low ON-state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports.
In addition to voltage translation, the TCA39306 can be used to isolate a higher speed bus from a lower speed bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.
PART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
---|---|---|
TCA39306 | VSSOP (8) | 2.30 mm x 2.00 mm |
SOT-23 (8) | 2.90 mm x 1.60 mm | |
X2SON (8) | 1.35 mm x 0.80 mm |
Changes from Revision A (August 2021) to Revision B (March 2023)
Changes from Revision * (June 2021) to Revision A (August 2021)
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | NO. | |||
DCU, DDF | DTM | |||
EN | 8 | 8 | I | Switch enable input |
GND | 1 | 1 | — | Ground, 0 V |
SCL1 | 3 | 3 | I/O | Serial clock, low-voltage side |
SCL2 | 6 | 6 | I/O | Serial clock, high-voltage side |
SDA1 | 4 | 4 | I/O | Serial data, low-voltage side |
SDA2 | 5 | 5 | I/O | Serial data, high-voltage side |
VREF1 | 2 | 2 | I | Low-voltage-side reference supply voltage for SCL1 and SDA1 |
VREF2 | 7 | 7 | I | High-voltage-side reference supply voltage for SCL2 and SDA2 |