Overview
The SN74LVCC3245A, produced by Texas Instruments, is an 8-bit (octal) noninverting bus transceiver designed for bidirectional voltage translation. This device is particularly useful for asynchronous communication between data buses operating at different voltage levels. It features 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 allows for seamless translation between various system environments, such as from 3.3 V to 5 V and from 2.5 V to 3.3 V.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCCA (Supply Voltage A Port) | 2.3 | 3.6 | V |
| VCCB (Supply Voltage B Port) | 3 | 5.5 | V |
| VI (Input Voltage) | -0.5 | VCCA + 0.5 (A Port), VCCB + 0.5 (B Port) | V |
| VO (Output Voltage) | -0.5 | VCCA + 0.5 (A Port), VCCB + 0.5 (B Port) | V |
| IIK (Input Clamp Current) | -50 | mA | |
| IOK (Output Clamp Current) | -50 | mA | |
| IO (Continuous Output Current) | ±50 | mA | |
| TJ (Junction Temperature) | - | 150 | °C |
| TA (Operating Free-Air Temperature) | -40 | 85 | °C |
Key Features
- Bidirectional voltage translator
- Operates from 2.3 V to 3.6 V on A port and 3 V to 5.5 V on B port
- Control inputs VIH and VIL levels are referenced to VCCA voltage
- Latch-up performance exceeds 250 mA per JESD 17
- ESD protection exceeds JESD 22 – 2000-V Human Body Model (A114-A) and 1000-V Charged-Device Model (C101)
Applications
- Level translation
- USB interfaces
- Interfacing between different voltage systems
- Analog and digital applications
Q & A
- What is the primary function of the SN74LVCC3245A device?
The SN74LVCC3245A is a bidirectional voltage translator designed for asynchronous communication between data buses operating at different voltage levels.
- What are the voltage ranges for the A and B ports of the SN74LVCC3245A?
The A port operates from 2.3 V to 3.6 V, and the B port operates from 3 V to 5.5 V.
- What kind of ESD protection does the SN74LVCC3245A offer?
The device offers ESD protection exceeding JESD 22 – 2000-V Human Body Model (A114-A) and 1000-V Charged-Device Model (C101).
- What are some common applications of the SN74LVCC3245A?
Common applications include level translation, USB interfaces, interfacing between different voltage systems, and analog and digital applications.
- How does the SN74LVCC3245A handle latch-up performance?
The device's latch-up performance exceeds 250 mA per JESD 17.
- What is the operating temperature range for the SN74LVCC3245A?
The operating free-air temperature range is from -40°C to 85°C.
- What are the package options available for the SN74LVCC3245A?
The device is available in SSOP, SOIC, TSSOP, and SO packages.
- How does the direction-control (DIR) input work on the SN74LVCC3245A?
The direction-control (DIR) input determines the direction of data transmission between the A and B buses.
- What is the significance of the output enable (OE) input on the SN74LVCC3245A?
The output enable (OE) input, which is active low, controls the output state of the device, enabling or disabling the outputs.
- What are the thermal characteristics of the SN74LVCC3245A?
The device has specified thermal resistances such as junction-to-ambient (RθJA), junction-to-case (RθJC), and junction-to-board (RθJB) thermal resistances, which vary depending on the package type.
