Overview
The SN74LVC4245ADBR is an 8-bit (octal) noninverting bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between data buses and features two separate supply rails: the B port operates at 3.3 V (VCCB), and the A port operates at 5 V (VCCA). This configuration allows for voltage translation from a 3.3-V to a 5-V environment and vice versa. The device 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 can be used to disable the device, effectively isolating the buses.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Package Type | 24-SSOP (DB), 24-SOIC (DW), 24-TSSOP (PW) | Surface mount packages |
| Number of Channels | 8 | Octal bus transceiver |
| Voltage - VCCA | 4.5 V to 5.5 V | Supply voltage for A port |
| Voltage - VCCB | 2.7 V to 3.6 V | Supply voltage for B port |
| Operating Temperature | -40°C to 85°C | Ambient operating temperature range |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model | Electrostatic discharge protection levels |
| Latch-up Performance | Exceeds 250 mA per JESD 17 | Latch-up performance according to JESD 17 standard |
| RoHS Status | Lead-free, RoHS compliant | Compliance with RoHS regulations |
Key Features
- Bidirectional Voltage Translator: Translates signals between 3.3-V and 5-V environments.
- Control Inputs: Direction-control (DIR) and output-enable (OE) inputs, with control circuitry powered by VCCA.
- ESD Protection: Exceeds 2000-V Human-Body Model and 1000-V Charged-Device Model.
- Latch-up Performance: Exceeds 250 mA per JESD 17.
- Tri-State, Non-Inverted Output: Output type is tri-state, non-inverted.
- Flexible Packaging: Available in 24-SSOP, 24-SOIC, and 24-TSSOP packages.
Applications
The SN74LVC4245ADBR is suitable for various applications requiring voltage translation between 3.3-V and 5-V systems. These include:
- Data Communication Systems: Asynchronous communication between data buses in mixed-voltage systems.
- Embedded Systems: Voltage translation in embedded systems that require communication between different voltage domains.
- Industrial Automation: Use in industrial automation where different voltage levels are present in the system.
- Consumer Electronics: Applications in consumer electronics that require interfacing between different voltage levels.
Q & A
- What is the primary function of the SN74LVC4245ADBR?
The primary function is to act as a bidirectional voltage translator between 3.3-V and 5-V environments.
- What are the supply voltage ranges for VCCA and VCCB?
VCCA ranges from 4.5 V to 5.5 V, and VCCB ranges from 2.7 V to 3.6 V.
- How does the direction-control (DIR) input work?
The DIR input controls the direction of data transmission between the A and B buses.
- 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 available package types for the SN74LVC4245ADBR?
The device is available in 24-SSOP, 24-SOIC, and 24-TSSOP packages.
- What is the operating temperature range for the SN74LVC4245ADBR?
The operating temperature range is from -40°C to 85°C.
- Does the SN74LVC4245ADBR have ESD protection?
Yes, it exceeds 2000-V Human-Body Model and 1000-V Charged-Device Model.
- Is the SN74LVC4245ADBR RoHS compliant?
Yes, it is lead-free and RoHS compliant.
- What is the latch-up performance of the SN74LVC4245ADBR?
It exceeds 250 mA per JESD 17.
- Can the SN74LVC4245ADBR be used in safety-critical applications?
No, it is not recommended for use in safety-critical applications without proper evaluation and validation.
