PCA9306USG ON Semiconductor Integrated Circuit (Small Outline Packages) In Stock
ON Semiconductor PCA9306USG is a dual bidirectional I2C bus voltage level translator in an 8-pin small outline package. Key specs include 2-bit open-drain level shifting between 1.0V to 5.5V domains, 400kHz I2C Fast Mode, and 3.3ns propagation delay. Available in stock worldwide with fast shipping for mixed-voltage system designs.
- Manufacturer
- ON Semiconductor
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- PCA9306USG Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4600(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2-bit bidirectional voltage translation between 1.0V to 5.5V domains without direction control pins
- Supports I2C Fast Mode at 400kHz and Fast-Mode Plus up to 1MHz for high-speed bus translation
- Open-drain outputs with 3.3ns maximum propagation delay minimize timing budget impact
- Single 8-pin US-8 (SOIC-8) package simplifies PCB routing for I2C level shifting
- Wide supply voltage range 1.0V to 5.5V per side enables 1.8V MCU to 5V sensor bridging
Applications
The PCA9306USG is used in mixed-voltage embedded systems to bridge 3.3V microcontrollers to 5V I2C sensors and EEPROMs without requiring external pull-up resistor modifications. It also enables interfacing 1.8V SoCs to 3.3V peripheral devices such as real-time clocks, I/O expanders, and ambient light sensors in battery-powered IoT nodes. Its bidirectional auto-sensing eliminates the need for software direction control, simplifying firmware for systems where master and slave devices communicate over the same I2C bus at different logic levels.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | 493-01 |
| YTEOL | 0 |
| Delay-Max | 3.3ns |
| Interface IC Type | VOLTAGE LEVEL TRANSLATOR |
| JESD-30 Code | R-PDSO-G8 |
| Number of Bits | 2 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-DRAIN |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.11,20 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 1V |
| Supply Voltage-Nom | 1.2V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 1.8V |
| Supply Voltage1-Nom | 3.3V |
| Surface Mount | YES |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Gold/Palladium (Ni/Au/Pd) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China, Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PCA9306USG:
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Frequently Asked Questions
Can PCA9306USG translate I2C signals between a 1.8V MCU and a 5V EEPROM on the same bus?
Yes — the PCA9306USG supports VCCI1 from 1.0V to 5.5V and VCCI2 independently from 1.0V to 5.5V, making 1.8V to 5V translation straightforward. The 2 open-drain channels automatically detect current direction without external control, allowing a 1.8V MCU master to communicate with a 5V EEPROM slave at up to 400kHz I2C Fast Mode. Pull-up resistors (typically 4.7kΩ to 10kΩ) to each respective supply must be added on both sides.
How does the 3.3ns propagation delay of PCA9306USG affect I2C timing at 400kHz?
At 400kHz I2C Fast Mode, one clock period is 2500ns. The PCA9306USG's maximum 3.3ns propagation delay is less than 0.2% of the clock period, adding negligible setup and hold time impact. Even at 1MHz Fast-Mode Plus (1000ns period), the 3.3ns delay is only 0.33% of the period, leaving ample timing margin. This makes PCA9306USG suitable for all standard I2C speeds from 100kHz Standard Mode to 1MHz Fast-Mode Plus.
What pull-up resistor values are recommended on each side of PCA9306USG for 400kHz operation?
For 400kHz I2C Fast Mode with PCA9306USG, pull-up resistors of 1kΩ to 4.7kΩ per side are typical, with exact values determined by bus capacitance. A 3.3V side with 100pF total bus capacitance uses a 3kΩ pull-up resistor to achieve a rise time under 300ns (I2C spec limit at 400kHz). A 5V side with the same 100pF can use 4.7kΩ. Resistors smaller than 1kΩ increase power consumption; values above 10kΩ cause excessive rise times at 400kHz.
When is PCA9306USG a better choice than a resistor voltage divider for I2C level shifting?
A simple resistor divider is unidirectional and introduces an IR drop on the signal line proportional to pull-up current — unsuitable for I2C's open-drain bidirectional bus. The PCA9306USG supports true bidirectional 2-wire translation with correct logic thresholds on each 1.0V to 5.5V domain, handles both SDA and SCL simultaneously, and supports Fast-Mode Plus at 1MHz without degrading signal integrity. Dividers also create leakage paths between supply domains; the PCA9306USG isolates them properly.
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About ON Semiconductor
ON Semiconductor (onsemi) provides intelligent power and sensing technologies for automotive, industrial, IoT, and cloud infrastructure applications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.9125 | $1.91 |
| 5+ | $0.5200 | $2.60 |
| 25+ | $0.4810 | $12.03 |
| 50+ | $0.4600 | $23.00 |
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