Overview
The 74LVCH8T245BQ is an 8-bit dual supply translating transceiver produced by Nexperia USA Inc. This device is designed to enable bidirectional level translation between two data buses operating at different voltage levels. It features 3-state outputs and is particularly useful in systems where data needs to be transferred between different voltage domains.
The transceiver includes two data input-output ports (pins An and Bn), a direction control input (DIR), and an output enable input (OE). The device supports a wide range of supply voltages, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC(A) | 1.2 - 5.5 | V |
| VCC(B) | 1.2 - 5.5 | V |
| Logic Switching Levels | CMOS/LVTTL | |
| Output Drive Capability | ±24 | mA |
| Propagation Delay (tpd) | 3.5 | ns |
| Number of Bits | 8 | |
| Operating Temperature Range (Tamb) | -40 to 125 | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | 66 | K/W |
| Package Type | DHVQFN24 (SOT815-1) |
Key Features
- Bidirectional Level Translation: Enables data transfer between two buses operating at different voltage levels.
- Wide Supply Voltage Range: Supports VCC(A) and VCC(B) from 1.2 V to 5.5 V.
- High Noise Immunity: Complies with JEDEC standards for various voltage ranges.
- High Data Rates: Supports maximum data rates up to 420 Mbps depending on the voltage translation.
- Low Power Consumption: Maximum ICC of 30 μA.
- ESD Protection: Provides protection against electrostatic discharge.
- Active Bus Hold Circuitry: Holds unused or floating data inputs at a valid logic level in the 74LVCH8T245 model.
- Partial Power-Down Mode: IOFF circuitry allows for partial power-down mode operation.
Applications
The 74LVCH8T245BQ is suitable for a wide range of applications, including:
- Automotive Systems: Qualified to AEC-Q100/Q101 standards.
- Industrial Control Systems: Where data needs to be translated between different voltage domains.
- Consumer Electronics: For devices requiring level translation between different voltage levels.
- Mobile and Wearable Devices: Where low power consumption and high data rates are critical.
- Computing and Power Systems: For efficient data transfer between different voltage nodes.
Q & A
- What is the primary function of the 74LVCH8T245BQ?
The primary function is to enable bidirectional level translation between two data buses operating at different voltage levels.
- What is the range of supply voltages supported by the 74LVCH8T245BQ?
The device supports VCC(A) and VCC(B) from 1.2 V to 5.5 V.
- What are the maximum data rates supported by the 74LVCH8T245BQ?
The maximum data rates vary depending on the voltage translation, up to 420 Mbps for 3.3 V to 5.0 V translation.
- Does the 74LVCH8T245BQ have ESD protection?
Yes, the device includes ESD protection.
- What is the operating temperature range of the 74LVCH8T245BQ?
The operating temperature range is -40°C to 125°C.
- What package type is the 74LVCH8T245BQ available in?
The device is available in the DHVQFN24 (SOT815-1) package.
- Does the 74LVCH8T245BQ support partial power-down mode?
Yes, it supports partial power-down mode through IOFF circuitry.
- What is the purpose of the active bus hold circuitry in the 74LVCH8T245BQ?
The active bus hold circuitry holds unused or floating data inputs at a valid logic level.
- Is the 74LVCH8T245BQ qualified for automotive applications?
Yes, it is qualified to AEC-Q100/Q101 standards.
- What is the maximum output drive capability of the 74LVCH8T245BQ?
The maximum output drive capability is ±24 mA.
