Overview
The SN74LVT245BPWRE4 is an octal bus transceiver designed by Texas Instruments for low-voltage (3.3-V) VCC operation. This device is capable of providing a TTL interface to a 5-V system environment, making it versatile for various applications. It is used for asynchronous communication between data buses, allowing data transmission from the A bus to the B bus or vice versa, based on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device, effectively isolating the buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | TSSOP (PW) | |
| Pins | 20 | |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.7 to 3.6 | V |
| High-Level Input Voltage | 2 | V |
| Low-Level Input Voltage | 0.8 | V |
| High-Level Output Current | -32 | mA |
| Low-Level Output Current | 64 | mA |
| Input Transition Rise or Fall Rate | 10 | ns/V |
| Power-Up Ramp Rate | 200 | μs/V |
Key Features
- Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
- Supports Unregulated Battery Operation Down to 2.7 V
- Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Ioff and Power-Up 3-State Support for Hot Insertion
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22: 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model
Applications
The SN74LVT245BPWRE4 is suitable for a variety of applications requiring asynchronous communication between data buses. It is particularly useful in systems that need to interface between 3.3-V and 5-V logic levels. Common applications include:
- Embedded Systems
- Industrial Control Systems
- Communication Equipment
- Automotive Electronics
- Consumer Electronics
Q & A
- What is the primary function of the SN74LVT245BPWRE4?
The SN74LVT245BPWRE4 is an octal bus transceiver designed for asynchronous communication between data buses, allowing data transmission from the A bus to the B bus or vice versa.
- What is the operating voltage range of the SN74LVT245BPWRE4?
The device operates within a supply voltage range of 2.7 to 3.6 volts.
- What package types are available for the SN74LVT245BPWRE4?
The device is available in a 20-pin TSSOP (PW) package among other options.
- What is the temperature range for the SN74LVT245BPWRE4?
The operating temperature range is from -40°C to 85°C.
- Does the SN74LVT245BPWRE4 support hot-insertion applications?
- What kind of ESD protection does the SN74LVT245BPWRE4 offer?
The device offers ESD protection exceeding JESD 22 standards: 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- How does the output-enable (OE) input function?
The output-enable (OE) input can be used to disable the device, effectively isolating the buses.
- What is the typical output ground bounce (VOLP) for the SN74LVT245BPWRE4?
The typical VOLP is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- Is the SN74LVT245BPWRE4 suitable for mixed-voltage systems?
- What are some common applications for the SN74LVT245BPWRE4?
