Specifications
| Type | Description |
|---|---|
| Part Number | PCA9306DCUR |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | DCU package, 8-pin VSSOP, 2.3 mm x 3.1 mm nominal |
| Number of translated channels | 2-bit; for SDA and SCL lines |
| Supported interfaces | I2C and SMBus compatible; mixed-mode I2C applications |
| Maximum propagation delay | < 1.5 ns; supports standard-mode and fast-mode I2C devices and multiple controllers |
| Low-side reference operating range | 1.2 V to 3.3 V; VREF1 operational range |
| High-side reference operating range | 1.8 V to 5.5 V; VREF2 operational range |
| Voltage translation range | 1.2 V to 5 V; bidirectional voltage translation without direction pin |
| Supported translation pair | 1.2-V VREF1 to 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2 |
| Supported translation pair | 1.8-V VREF1 to 2.5-V, 3.3-V, or 5-V VREF2 |
| Supported translation pair | 2.5-V VREF1 to 3.3-V or 5-V VREF2 |
| Supported translation pair | 3.3-V VREF1 to 5-V VREF2 |
| Direction control | No direction pin required; bidirectional voltage translation |
| ON-state resistance | 3.5 ohm; between input and output ports |
| I/O port type | Open-drain I2C I/O ports; SCL1, SDA1, SCL2, SDA2 |
| I/O voltage tolerance | 5-V tolerant; I2C I/O ports for mixed-mode signal operation |
| Disabled port state | High impedance; SCL1, SDA1, SCL2, SDA2 when EN = low |
| Bus isolation capability | Lockup-free operation; isolation when EN = low |
| Latch-up performance | > 100 mA; per JESD 78, class II |
| Human-body model ESD rating | ±2000 V; per ANSI/ESDA/JEDEC JS-001, all pins |
| Charged-device model ESD rating | ±1000 V; per ANSI/ESDA/JEDEC JS-0011, all pins |
| VREF1 absolute maximum range | -0.5 V to 7 V; DC reference voltage range over operating ambient temperature range |
| VREF2 absolute maximum range | -0.5 V to 7 V; DC reference bias voltage range over operating ambient temperature range |
| Input voltage absolute maximum range | -0.5 V to 7 V; input voltage range |
| Input/output voltage absolute maximum range | -0.5 V to 7 V; input/output voltage range |
| Continuous channel current absolute maximum | 128 mA; continuous channel current |
| Input clamp current absolute maximum | -50 mA; VI < 0 |
| Maximum junction temperature | 125 °C; absolute maximum rating |
| Storage temperature range | -65 °C to 150 °C; absolute maximum rating |
| Recommended I/O voltage | 0 V to 5.5 V; SCL1, SDA1, SCL2, SDA2 |
| Recommended VREF1 voltage | 0 V to 5.5 V; for translation VREF1 supports 1.2 V to VREF2 - 0.6 V |
| Recommended VREF2 voltage | 0 V to 5.5 V; for translation VREF2 must be between VREF1 + 0.6 V and 5.5 V |
| Enable input voltage | 0 V to 5.5 V; recommended operating condition |
| Pass switch current | 64 mA; recommended operating condition |
| Operating ambient temperature | -40 °C to 85 °C; recommended operating condition |
| DCU junction-to-ambient thermal resistance | 275.5 °C/W; RθJA, DCU 8-pin package |
| DCU junction-to-case top thermal resistance | 127.1 °C/W; RθJC(top), DCU 8-pin package |
| DCU junction-to-board thermal resistance | 186.9 °C/W; RθJB, DCU 8-pin package |
| EN pin function | Switch enable input; pin 8 on DCT/DCU/YZT, pin A2 on DQE |
| SCL1 pin function | Serial clock, low-voltage side; pin 3 on DCT/DCU/YZT, pin C1 on DQE |
| SCL2 pin function | Serial clock, high-voltage side; pin 6 on DCT/DCU/YZT, pin C2 on DQE |
| SDA1 pin function | Serial data, low-voltage side; pin 4 on DCT/DCU/YZT, pin D1 on DQE |
| SDA2 pin function | Serial data, high-voltage side; pin 5 on DCT/DCU/YZT, pin D2 on DQE |
| Datasheet Status | request_only |
Product Overview
The translator supports bidirectional operation without a direction pin. VREF1 operates from 1.2 V to 3.3 V, while VREF2 operates from 1.8 V to 5.5 V, enabling voltage translation from 1.2 V to 5 V. Supported pairings include 1.2 V to 1.8 V, 2.5 V, 3.3 V, or 5 V; 1.8 V to 2.5 V, 3.3 V, or 5 V; 2.5 V to 3.3 V or 5 V; and 3.3 V to 5 V.
Key Features
- Dual bidirectional translator for SDA and SCL lines
- I2C and SMBus compatible mixed-mode interface support
- Less than 1.5 ns maximum propagation delay
- VREF1 operating range from 1.2 V to 3.3 V
- VREF2 operating range from 1.8 V to 5.5 V
- 1.2 V to 5 V bidirectional voltage translation
- No direction pin required for bidirectional operation
- 3.5 ohm ON-state resistance between ports
- 5-V tolerant open-drain I2C I/O ports
- High-impedance I/O state when EN is low
Typical Applications
- Mixed-mode I2C applications
- SMBus voltage-level translation
- SDA and SCL level shifting
- Standard-mode I2C bus translation
- Fast-mode I2C bus translation
- Multiple-controller I2C systems
- Low-voltage to 5-V I2C interfaces
- Bus isolation with EN control
Procurement Notes
When requesting a quote for PCA9306DCUR, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What interface lines does PCA9306DCUR translate?
PCA9306DCUR provides two translated channels for the SDA and SCL lines. The ports are open-drain I2C I/O ports, and the device is compatible with I2C and SMBus interfaces in mixed-mode I2C applications.
Does PCA9306DCUR require a direction control pin?
No. PCA9306DCUR supports bidirectional voltage translation without a direction pin. The extracted facts specify a 1.2 V to 5 V translation range and supported VREF1-to-VREF2 translation pairings.
What happens when the EN input is low?
When EN is low, SCL1, SDA1, SCL2, and SDA2 are placed in a high-impedance state. The datasheet facts also identify lockup-free bus isolation capability under the EN-low isolation condition.
What package is used for PCA9306DCUR?
PCA9306DCUR uses the DCU package, an 8-pin VSSOP with nominal dimensions of 2.3 mm by 3.1 mm. The DCU thermal data includes 275.5 °C/W junction-to-ambient resistance.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.