Overview
The 74AVCH4T245GU/S500115, produced by NXP USA Inc. (now part of Nexperia), is a 4-bit, dual supply transceiver designed for bidirectional level translation. This device can be utilized as two 2-bit transceivers or as a single 4-bit transceiver, making it highly versatile in various electronic designs. It features four 2-bit input-output ports (nAn and nBn), a direction control input (nDIR), an output enable input (nOE), and dual supply pins (VCC(A) and VCC(B)) that can operate within a wide voltage range of 0.8 V to 3.6 V. This flexibility allows the device to translate between different low voltage nodes, making it suitable for a broad range of applications.
Key Specifications
| Type number | VCC(A) (V) | VCC(B) (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Number of bits | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name | Category |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74AVCH4T245GU | 0.8 - 3.6 | 0.8 - 3.6 | CMOS/LVTTL | ± 12 | 2.1 | 4 | Very low | -40 to 125 | 99 | 4.1 | 88 | XQFN16 | Bi-directional | Direction controlled |
Key Features
- Wide Supply Voltage Range: Both VCC(A) and VCC(B) can be supplied at any voltage between 0.8 V and 3.6 V, making the device suitable for translating between various low voltage nodes.
- Bidirectional Level Translation: The device allows bidirectional level translation, enabling transmission from nAn to nBn or from nBn to nAn based on the direction control input (nDIR).
- Output Enable Input: The output enable input (nOE) can be used to disable the outputs, effectively isolating the buses.
- Partial Power-Down Capability: The device is fully specified for partial power-down applications using IOFF circuitry, which prevents damaging backflow current when the device is powered down.
- Active Bus Hold Circuitry: This feature holds unused or floating data inputs at a valid logic level, eliminating the need for external pull-up or pull-down resistors.
- Compliance with JEDEC Standards: The device complies with various JEDEC standards, including JESD8-12, JESD8-11, JESD8-7, JESD8-5, and JESD8-B.
Applications
The 74AVCH4T245GU/S500115 is suitable for a wide range of applications, including:
- Automotive Systems: For voltage translation between different voltage domains in automotive electronics.
- Industrial Control Systems: To ensure reliable communication between components operating at different voltage levels.
- Consumer Electronics: For interfacing between different voltage nodes in consumer electronic devices.
- IoT Devices: To facilitate communication between components with varying voltage requirements in IoT applications.
Q & A
- What is the primary function of the 74AVCH4T245GU/S500115?
The primary function is to enable bidirectional level translation between two different voltage domains.
- What is the voltage range for VCC(A) and VCC(B)?
Both VCC(A) and VCC(B) can operate within a voltage range of 0.8 V to 3.6 V.
- How does the direction control input (nDIR) work?
A HIGH on nDIR allows transmission from nAn to nBn, while a LOW on nDIR allows transmission from nBn to nAn.
- What is the purpose of the output enable input (nOE)?
The output enable input (nOE) can be used to disable the outputs, effectively isolating the buses.
- Is the device suitable for partial power-down applications?
Yes, the device is fully specified for partial power-down applications using IOFF circuitry.
- What is the significance of active bus hold circuitry in this device?
The active bus hold circuitry holds unused or floating data inputs at a valid logic level, eliminating the need for external pull-up or pull-down resistors.
- Which JEDEC standards does the device comply with?
The device complies with JESD8-12, JESD8-11, JESD8-7, JESD8-5, and JESD8-B.
- What is the maximum data rate supported by the device?
The device supports a propagation delay (tpd) of 2.1 ns, indicating high-speed data transmission capability.
- What is the operating temperature range for the device?
The device operates within a temperature range of -40°C to 125°C.
- What package types are available for the 74AVCH4T245GU/S500115?
The device is available in XQFN16 packages.
