Overview
The SN74LVCC3245ADWE4, produced by Texas Instruments, is an 8-bit (octal) noninverting bus transceiver designed for bidirectional communication between two data buses. This device is particularly suited for voltage translation applications, allowing seamless communication between different logic levels. It operates with two separate supply rails: the A port operates from 2.3 V to 3.6 V, and the B port operates from 3 V to 5.5 V. This flexibility makes it ideal for mixed-voltage systems, enabling translation from a 3.3-V to a 5-V system environment and vice versa, as well as from a 2.5-V to a 3.3-V system environment and vice versa.
Key Specifications
| Parameter | Min | Max | Unit | Description |
|---|---|---|---|---|
| VCCA | 2.3 | 3.6 | V | Supply voltage on A port |
| VCCB | 3 | 5.5 | V | Supply voltage on B port |
| VI (A ports) | -0.5 | VCCA + 0.5 | V | Input voltage on A ports |
| VI (B ports) | -0.5 | VCCB + 0.5 | V | Input voltage on B ports |
| VO (A ports) | -0.5 | VCCA + 0.5 | V | Output voltage on A ports |
| VO (B ports) | -0.5 | VCCB + 0.5 | V | Output voltage on B ports |
| IIK | -50 | -50 | mA | Input clamp current |
| IOK | -50 | -50 | mA | Output clamp current |
| IO | -50 | 50 | mA | Continuous output current |
| TJ | - | 150 | °C | Junction temperature |
| TA | -40 | 85 | °C | Operating free-air temperature |
Key Features
- Bidirectional Voltage Translator: Enables data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input.
- Dual Supply Rails: The A port operates from 2.3 V to 3.6 V, and the B port operates from 3 V to 5.5 V, allowing for level translation between different voltage systems.
- Control Inputs: The control inputs (DIR, OE) are referenced to VCCA voltage, providing precise control over data flow.
- Latch-Up Performance: Exceeds 250 mA per JESD 17, ensuring robust operation against latch-up conditions.
- ESD Protection: Exceeds JESD 22 standards, including 2000-V Human Body Model (A114-A), 1000-V Charged-Device Model (C101), and 200-V Machine Model (A115-A).
- Output Enable (OE): The OE input can be used to disable the device, placing the outputs in a high-impedance state and isolating the buses.
- Thermal Performance: The device has specified thermal metrics, including junction-to-ambient thermal resistance, ensuring reliable operation across a range of temperatures.
Applications
- Level Translation: Ideal for translating signals between different voltage levels, such as from 3.3 V to 5 V or from 2.5 V to 3.3 V.
- USB and Interfacing: Suitable for USB applications and general interfacing between different logic levels.
- Analog and Digital Applications: Can be used in both analog and digital applications where voltage translation is necessary.
- Mixed-Voltage Systems: Designed for use in mixed-voltage systems, making it a versatile component for various electronic designs.
Q & A
- What is the primary function of the SN74LVCC3245ADWE4?
The primary function is to act as a bidirectional voltage translator between two data buses, enabling communication between different logic levels.
- What are the operating voltage ranges for the A and B ports?
The A port operates from 2.3 V to 3.6 V, and the B port operates from 3 V to 5.5 V.
- How does the direction-control (DIR) input work?
The DIR input determines the direction of data flow, allowing the bus transceiver to operate in either direction (A to B or B to A).
- What is the purpose of the output-enable (OE) input?
The OE input can be used to disable the device, placing the outputs in a high-impedance state and isolating the buses.
- What kind of ESD protection does the SN74LVCC3245ADWE4 offer?
The device exceeds JESD 22 standards, including 2000-V Human Body Model, 1000-V Charged-Device Model, and 200-V Machine Model.
- What are the thermal operating conditions for the SN74LVCC3245ADWE4?
The device operates from -40°C to 85°C.
- What types of applications is the SN74LVCC3245ADWE4 suitable for?
It is suitable for level translation, USB, interfacing, and both analog and digital applications.
- What packages are available for the SN74LVCC3245ADWE4?
The device is available in various packages including SSOP, SOIC, TSSOP, and SO.
- How does the latch-up performance of the SN74LVCC3245ADWE4 compare to industry standards?
The latch-up performance exceeds 250 mA per JESD 17.
- Can the SN74LVCC3245ADWE4 be used in mixed-voltage systems?
Yes, it is designed for use in mixed-voltage systems, making it versatile for various electronic designs.
