Overview
The SN74LVC4245APWR, produced by Texas Instruments, is a versatile 8-bit bidirectional bus transceiver and voltage level converter. This non-inverting device is designed for asynchronous communication between data buses operating at different voltage levels, specifically from 3.3V to 5V. It facilitates bidirectional data transfer between the A and B buses, controlled by the DIR input, and features a three-state output for temporary isolation of bus lines. The device supports a broad input/output voltage range from 1.65V to 5.5V, making it compatible with various logic families.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Channels | 8 |
| Propagation Delay Time | 6.7 ns |
| Supply Voltage Range | 2.7/4.5V to 3.6/5.5V |
| Output Current | 24 mA (low level), -24 mA (high level) |
| Operational Temperature Range | -40°C to 85°C |
| Package Dimensions | 7.8 mm x 4.4 mm x 1.15 mm (TSSOP) |
| ESD Protection | Exceeds 2000-V Human-Body Model and 1000-V Charged-Device Model |
Key Features
- Bidirectional Data Transfer: The device allows data transfer from the A bus to the B bus or from the B bus to the A bus, controlled by the DIR input.
- Voltage Level Translation: Supports translation between 3.3V and 5V environments, making it suitable for mixed-voltage signal designs.
- Three-State Output: The output-enable (OE) input allows for temporary isolation of bus lines.
- Broad Input/Output Voltage Range: Compatible with input/output voltages from 1.65V to 5.5V, supporting various logic families.
- Robust Drive Capabilities: Ensures reliable signal transmission over long distances or through high-capacitance loads.
- Comprehensive Protection: Includes overvoltage, undervoltage, over-current, and short-circuit protection for reliable performance in demanding environments.
Applications
- Mixed-Voltage Systems: Ideal for environments where subsystems operate at different voltages, such as in smartphones, tablets, and other modern electronic devices.
- High-Performance Systems: Suitable for applications requiring robust signal transmission over long distances or through high-capacitance loads.
- Server and Cable Modem Systems: Can be used in server systems and cable modem termination systems due to its high-speed data transfer capabilities.
- LED Displays and Other Electronic Systems: Applicable in various electronic systems that require level-shifting and reliable data communication).
Q & A
- What is the primary function of the SN74LVC4245APWR?
The primary function is to facilitate bidirectional data transfer between 3.3V and 5V data buses and to act as a voltage level translator.
- What is the propagation delay time of the SN74LVC4245APWR?
The propagation delay time is 6.7 ns.
- What is the operational temperature range of the SN74LVC4245APWR?
The operational temperature range is -40°C to 85°C.
- What types of protection does the SN74LVC4245APWR offer?
The device offers overvoltage, undervoltage, over-current, and short-circuit protection.
- How does the SN74LVC4245APWR handle bus isolation?
The device features a three-state output controlled by the OE input, allowing for temporary isolation of bus lines.
- What are the typical applications of the SN74LVC4245APWR?
Typical applications include mixed-voltage systems, high-performance systems, server systems, and LED displays.
- What is the package dimension of the SN74LVC4245APWR?
The package dimensions are 7.8 mm x 4.4 mm x 1.15 mm (TSSOP).
- How does the SN74LVC4245APWR support different logic families?
The device supports input/output voltages from 1.65V to 5.5V, making it compatible with various logic families.
- What is the ESD protection rating of the SN74LVC4245APWR?
The device exceeds 2000-V Human-Body Model and 1000-V Charged-Device Model ESD protection.
- What are the power supply recommendations for the SN74LVC4245APWR?
A proper power-up sequence should be followed, connecting ground before any supply voltage and powering up the control side of the device first.
