Part Number: PCA9306DTR2G

Manufacturer: onsemi

Description: Translation – Voltage Levels Dual BiDer I2C/SM Vol Level Trans

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of PCA9306DTR2G

Datasheet  PCA9306DTR2G datasheet
Category Integrated Circuits (ICs)
Family Logic – Translators, Level Shifters
Manufacturer ON Semiconductor
Packaging Tape & Reel (TR)
Part Status Active
Translator Type Voltage Level
Channel Type Bidirectional
Number of Circuits 1
Channels per Circuit 2
Voltage – VCCA 1 V ~ 3.6 V
Voltage – VCCB 1.8 V ~ 5.5 V
Input Signal
Output Signal
Output Type Open Drain
Data Rate
Operating Temperature -55°C ~ 125°C (TA)
Features Auto-Direction Sensing
Mounting Type Surface Mount
Package / Case 8-TSSOP (0.173″, 4.40mm Width)
Supplier Device Package 8-TSSOP

PCA9306DTR2G Description

If you’re building a circuit around a microprocessor and need to convert voltage levels, the ON Semiconductor PCA9306DTR2G level translator is the device for you. A wide operating temperature range (-55 to 125 degrees Celsius) makes this stage changer extremely versatile. Thanks to the tape and reel packaging, the components may be readily installed after the items have arrived. The gadget can operate from power supplies of 1.8 V, 2.5 V, 3.3 V, or 5 V. It needs a voltage of at least 0 V and can handle inputs of up to 5.5 V.

PCA9306DTR2G Features

  • The SDA and SCL lines of a 2-bit bidirectional translator on a mixed-mode I2C bus.
  • Typical, Rapid, Lightning-Fast I2C, and SMBus Settings are all on hand.
  • Typical Mode and Turbo Mode The maximum propagation delay for I2C-Bus devices, including multiple masters, is less than 1.5 ns.
  • Provides Bidirectional Voltage Conversion without a Separate “Direction” Pin.
  • Less signal distortion will occur if you connect your input and output ports while they are active.
  • A variety of transparent data-draining I2C interfaces (SCL1, SDA1, SCL2, and SDA2).
  • With I2C-Bus I/O Ports that are 5 V tolerant, you can use it with various signal types.
  • When EN is at its lowest setting, the SCL1, SDA1, SCL2, and SDA2 pins have high resistance.
  • Functioning that is not locked down.
  • A Flow-Through pin configuration can help with PCB trace routing.

Function Description

To operate between 1.0 V and 3.6 V (Vref(1)) and between 1.8 V and 5.5 V (Vbias(ref)(2)), the PCA9306 is a voltage level translator with an enable (EN) input. With no direction pin required, the PCA9306 can convert voltages between 1.0 V and 5 V in either direction. Fast connection setup and almost no propagation delay are made possible by the switch’s low on-state resistance (Ron). When EN is HIGH, the active translator switch permits communication between ports in both directions. This happens because the input/output signals for SCL1 and SDA1 are coupled to the system’s signals for SCL2 and SDA2.

When EN is LOW, high impedance is present between the ports, indicating that the translator is disabled. The PCA9306 does not function as a bus buffer by translating levels or isolating capacitance when both ends of the bus are connected. When both input and output voltages are present, the PCA9306 translates between them and separates them.

The PCA9306 can run two independent buses, one at 400 kHz and the other at 100 kHz. For one bus to operate at 400 kHz while the other is limited to 100 kHz, the lower-frequency bus must be disabled. The system’s maximum operational frequency may be lower than the master’s 400 kHz speed because of translation delays. The translator’s bus uses pull-up resistors to achieve high logic levels, just like a standard I2C bus. With PCA9306, the I2C bus is configured in the traditional open-collector method; each end of the translator needs to have a pull-up resistor attached to it, the value of which must be determined based on the configuration. It can communicate with other devices that use the SMBus or the I2C bus in either the Standard, Fast, or Fast Plus modes.

The RC time constant limits the maximum frequency; however, in most circumstances, it can be greater than 2 MHz. When there is a low resistance connection between SDA1 and SDA2, the clamp is activated. The voltage on SDA1 is limited by VREF1 when SDA2 is HIGH. For this reason, we will assume that the larger voltage is located on SDA2. When SDA1 is HIGH, the drain pull-up supply voltage (Vpu) is linked to SDA2 by the pull-up resistors (D). This function allows for a seamless transition between the higher and lower voltages specified by the user, eliminating the need for directional control.

To some extent, the SDA1/SDA2 channel can be seen as an instance of the SCL1/SCL2 channel. All media have the same electrical characteristics, and the voltage and propagation delay are virtually identical from one output to the next. Making a symmetrical switch is an advantage over other voltage translation methods that use discrete transistors. The translator excels in shielding low-voltage devices and those with lower ESD resistance from harm.

Bidirectional Translation

To implement the bidirectional clamping setup, the EN input must be wired to VREF2, and a pull-up resistor must be used to move both pins to the HIGH side of Vpu(D) (higher voltage to lower voltage or lower voltage to higher voltage). That’s essential for the bi-directionality of the clamping comprehension (typically 200 k). VREF2 allows for control of the EN input. It is suggested that a filter capacitor be wired into the VREF2 supply. Connecting the device’s SCL2 and SDA2 outputs to Vpu(D) may require pull-up resistors if the I2C bus master’s output is a totem pole rather than an open drain.

In contrast, if both outputs are totem poles, then either bidirectional data flow is required, or the outputs must have a direction-control mechanism that allows them to take on one of three states. This prevents arguments from arising between the HIGH and LOW levels. Fork control is unnecessary if both outputs are open-drain. Vref, short for reference supply voltage, is what the CPU core’s power supply is tied to (1) if Vref(1) is between 1.0 V and (Vpu(D) 1 V and Vref(2) is connected to a power supply between 3.3 V and 5.5 V Vpu.


The ON Semiconductor PCA9306FMUTCG level translator is for microprocessor-based circuits that translate voltage levels. This stage changer can handle -55 to 125 degrees Celsius. Tape and reel wrapping will keep goods safe throughout shipping and make components easy to assemble. Industry standards allow this device to use 1.8, 2.5, 3.3, and 5 V. It requires at least 0 V to operate and works on voltages from 0 to 5.5 V.

Contact ICRFQ, your one-stop shop for electronic sourcing components in China, if you require further information or like to place an order for the PCA9306DTR2G. We will work hard to ensure you get the best possible products at affordable prices.

4.8/5 - (397 votes)
Kevin Chen