Overview
The SN74LVC4245ADWRE4, 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 device can transmit data from the A bus to the B bus or vice versa, 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 | Description |
|---|---|
| Package Type | SOIC (DW), 24 pins |
| Operating Temperature Range | -40°C to 85°C |
| Voltage on A Port | 5.5 V |
| Voltage on B Port | 2.7 V to 3.6 V |
| Control Input Levels | Referenced to VCCA voltage |
| Latch-up Performance | Exceeds 250 mA per JESD 17 |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model |
Key Features
- Bidirectional voltage translator between 3.3-V and 5-V environments
- Control inputs (DIR, OE) powered by VCCA
- Latch-up performance exceeds 250 mA per JESD 17
- ESD protection exceeds JESD 22 standards (2000-V Human-Body Model, 1000-V Charged-Device Model)
- 3-state outputs for bus isolation
- Compatible with conventional 245 terminal out for easy design transition
Applications
The SN74LVC4245ADWRE4 is suitable for various applications requiring asynchronous communication and voltage translation between different voltage domains. These include:
- Mixed-voltage signal design in digital systems
- Data bus translation in embedded systems
- Interface between different voltage level components
- Industrial control systems requiring voltage level shifting
Q & A
- What is the primary function of the SN74LVC4245ADWRE4?
The primary function is to act as an 8-bit noninverting bus transceiver with bidirectional voltage translation between 3.3-V and 5-V environments.
- What are the voltage levels for the A and B ports?
The A port operates at 5 V (VCCA), and the B port operates at 3.3 V (VCCB).
- How is the direction of data transmission controlled?
The direction of data transmission is controlled by the direction-control (DIR) input.
- What is the purpose of the output-enable (OE) input?
The OE input can be used to disable the device, effectively isolating the buses.
- What are the package options for the SN74LVC4245ADWRE4?
The device is available in a SOIC (DW) package with 24 pins.
- What is the operating temperature range for this device?
The operating temperature range is -40°C to 85°C.
- Does the device have ESD protection?
Yes, it exceeds JESD 22 standards with 2000-V Human-Body Model and 1000-V Charged-Device Model protection.
- What are some common applications for this device?
Common applications include mixed-voltage signal design, data bus translation, and interface between different voltage level components.
- Is the device compatible with other terminal configurations?
Yes, it is compatible with conventional 245 terminal out, allowing for easy design transition without board re-layout.
- What is the latch-up performance of the device?
The latch-up performance exceeds 250 mA per JESD 17.
