Overview
The MC74LVX4245DTR2G, produced by onsemi, is a dual-supply octal translating transceiver designed to interface between 5.0 V and 3.0 V buses in mixed-voltage environments. This device is particularly useful in applications such as laptop computers, where a 3.3 V CPU and 5.0 V peripheral devices coexist. The transceiver allows for bidirectional data flow between the two voltage levels, making it an essential component for managing voltage differences in modern electronic systems.
Key Specifications
Parameter | Min | Typ | Max | Unit |
---|---|---|---|---|
DC Supply Voltage (VCCA, VCCB) | −0.5 | 7.0 | V | |
Input Voltage (OE, T/R) | −0.5 | VCCA + 0.5 | V | |
Output Source/Sink Current at 5.0 V Bus | 24 mA | mA | ||
Output Source/Sink Current at 3.0 V Bus | 12 mA | mA | ||
Propagation Delay A to B | 1.0 | 5.1 | 9.0 | ns |
Propagation Delay B to A | 1.0 | 5.4 | 9.0 | ns |
Operating Temperature Range | −40 | 85 | °C | |
Package Type | TSSOP-24 |
Key Features
- Bi-directional interface between 5.0 V and 3.0 V buses
- Control inputs compatible with TTL level
- Outputs source/sink 24 mA at 5.0 V bus and 12 mA at 3.0 V bus
- Guaranteed simultaneous switching noise level and dynamic threshold performance
- Available in SOIC and TSSOP packages
- Functionally compatible with the 74 Series 245
- NLV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 qualified and PPAP capable
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
The MC74LVX4245DTR2G is ideal for mixed-voltage applications such as:
- Notebook computers using a 3.3 V CPU and 5.0 V peripheral devices
- Mixed mode dual supply interface solutions where CMOS devices cannot tolerate I/O levels above their applied VCC
- Systems requiring bidirectional or unidirectional data flow between different voltage levels
- Automotive and industrial applications requiring robust voltage translation and compliance with automotive standards
Q & A
- What is the primary function of the MC74LVX4245DTR2G?
The primary function is to provide a bi-directional interface between 5.0 V and 3.0 V buses in mixed-voltage environments.
- What are the compatible package types for the MC74LVX4245?
The device is available in SOIC-24 and TSSOP-24 packages.
- What is the maximum output source/sink current at 5.0 V and 3.0 V buses?
The maximum output source/sink current is 24 mA at 5.0 V and 12 mA at 3.0 V.
- What is the recommended operating temperature range for the MC74LVX4245?
The recommended operating temperature range is from −40°C to +85°C.
- Is the MC74LVX4245 compatible with automotive standards?
- How should the VCCB and VCCA pins be powered up to avoid current issues?
The safest power-up strategy is to power VCCA before VCCB to avoid current penalties.
- What is the propagation delay for data flow from A to B and B to A?
The propagation delay is typically around 5.1 ns for A to B and 5.4 ns for B to A.
- Is the MC74LVX4245 RoHS compliant?
- Can the MC74LVX4245 be used in both bidirectional and unidirectional applications?
- What are the key benefits of using the MC74LVX4245 in mixed-voltage systems?
The key benefits include preventing latchup effects, reducing speed degradation, and minimizing power dissipation by providing a dedicated interface between different voltage levels.