Overview
The SN74LVC4245A, produced by Texas Instruments, is an 8-bit (octal) noninverting bus transceiver designed for asynchronous communication between data buses. This device features two separate supply rails: the B port operates at 3.3 V (VCCB), and the A port operates at 5 V (VCCA), enabling voltage translation between 3.3-V and 5-V environments. The transceiver can transmit data from the A bus to the B bus or from the B bus to the A bus, controlled by the direction-control (DIR) input. Additionally, the output-enable (OE) input allows the device to be disabled, effectively isolating the buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage - VCCA | 4.5 V to 5.5 V | V |
| Voltage - VCCB | 2.7 V to 3.6 V | V |
| Operating Temperature | -40°C to 85°C | °C |
| Package Type | 24-TSSOP (0.173", 4.40mm Width) | - |
| Number of Circuits | 1 | - |
| Channels per Circuit | 8 | - |
| Output Type | Tri-State, Non-Inverted | - |
| Mounting Type | Surface Mount | - |
| Storage Temperature Range | -65°C to 150°C | °C |
| Continuous Output Current | ±50 mA | mA |
| Continuous Current through VCCA or GND | ±100 mA | mA |
Key Features
- 8-bit (octal) noninverting bus transceiver with bidirectional data transmission.
- Voltage level translation between 3.3-V and 5-V environments.
- Direction-control (DIR) input to control data flow direction.
- Output-enable (OE) input to disable the device and isolate the buses.
- Tri-state, non-inverted outputs.
- Surface mount package (24-TSSOP).
- Operating temperature range: -40°C to 85°C.
- Compliant with RoHS standards.
Applications
- Asynchronous communication between data buses in mixed-voltage systems.
- Voltage level translation in embedded systems, industrial control systems, and consumer electronics.
- Data transmission and reception in various digital circuits where voltage level shifting is required.
- Interface between different voltage domains in system-on-chip (SoC) designs.
Q & A
- What is the primary function of the SN74LVC4245A?
The SN74LVC4245A is an 8-bit noninverting bus transceiver designed for asynchronous communication between data buses, allowing voltage level translation between 3.3-V and 5-V environments.
- What are the voltage ranges for VCCA and VCCB?
VCCA operates from 4.5 V to 5.5 V, and VCCB operates from 2.7 V to 3.6 V.
- How is the direction of data flow controlled in the SN74LVC4245A?
The direction of data flow is controlled by the direction-control (DIR) input.
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input allows the device to be disabled, effectively isolating the buses.
- What is the package type of the SN74LVC4245A?
The device is available in a 24-TSSOP package.
- What is the operating temperature range of the SN74LVC4245A?
The operating temperature range is -40°C to 85°C.
- Is the SN74LVC4245A RoHS compliant?
Yes, the SN74LVC4245A is RoHS compliant.
- What is the maximum continuous output current of the SN74LVC4245A?
The maximum continuous output current is ±50 mA.
- What is the storage temperature range for the SN74LVC4245A?
The storage temperature range is -65°C to 150°C.
- In what types of systems is the SN74LVC4245A typically used?
The SN74LVC4245A is typically used in mixed-voltage systems, embedded systems, industrial control systems, and consumer electronics where voltage level translation is necessary.
