Overview
The 74LVCH245APW is an 8-bit bus transceiver with 3-state outputs, manufactured by Nexperia (previously part of NXP Semiconductors). This device is designed for asynchronous communication between data buses and features output enable (OE) and send/receive (DIR) pins for direction control. It is capable of operating in mixed 3.3 V and 5 V environments, making it versatile for various applications. The device is known for its low-power CMOS technology and overvoltage tolerant inputs up to 5.5 V.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Type Number | 74LVCH245APW | - |
| Supply Voltage (VCC) | Operating range | 1.65 V to 3.6 V |
| Input Voltage (VI) | Maximum | 0 to 5.5 V |
| Output Drive Capability | High-Level Output Current | -4 mA (VCC = 1.65 V), -8 mA (VCC = 2.3 V), -12 mA (VCC = 2.7 V), -24 mA (VCC = 3.0 V) |
| Low-Level Output Current | 4 mA (VCC = 1.65 V), 8 mA (VCC = 2.3 V), 12 mA (VCC = 2.7 V), 24 mA (VCC = 3.0 V) | - |
| Propagation Delay (tpd) | Maximum | 2.9 ns |
| Number of Bits | - | 8 |
| Maximum Frequency (fmax) | - | 175 MHz |
| Operating Temperature (Tamb) | Range | -40 °C to +125 °C |
| Package | - | TSSOP20 (SOT360-1) |
Key Features
- Output Enable and Direction Control: Features an output enable (OE) and send/receive (DIR) for direction control, allowing for flexible data transmission.
- 3-State Outputs: Outputs can be set to a high-impedance OFF-state when OE is HIGH.
- Mixed Voltage Environment Compatibility: Can be used in mixed 3.3 V and 5 V environments, making it suitable for various applications.
- Schmitt-Trigger Inputs: Tolerant of slower input rise and fall times due to Schmitt-trigger action at all inputs.
- Low Power Consumption: CMOS technology ensures low power consumption.
- Overvoltage Tolerant Inputs: Inputs are tolerant up to 5.5 V.
- Bus Hold on Data Inputs: The 74LVCH245A specifically features bus hold on all data inputs.
- IOFF Circuitry: Provides partial power-down mode operation, preventing backflow current when powered down.
- ESD Protection: Human Body Model (HBM) exceeds 2000 V and Charged Device Model (CDM) exceeds 1000 V.
Applications
- Data Bus Communication: Ideal for asynchronous communication between data buses in various digital systems.
- Mixed Voltage Systems: Suitable for systems that require translation between 3.3 V and 5 V logic levels.
- Embedded Systems: Used in embedded systems where low power consumption and robustness are critical.
- Industrial Control Systems: Can be used in industrial control systems that require reliable and efficient data transmission.
Q & A
- What is the primary function of the 74LVCH245APW?
The primary function is to act as an 8-bit bus transceiver with 3-state outputs for asynchronous communication between data buses.
- What is the operating voltage range of the 74LVCH245APW?
The operating voltage range is from 1.65 V to 3.6 V.
- Can the 74LVCH245APW be used in mixed voltage environments?
Yes, it can be used in mixed 3.3 V and 5 V environments.
- What is the purpose of the OE and DIR pins?
The OE (Output Enable) pin controls the output state, and the DIR (Direction) pin controls the direction of data transmission.
- What is the significance of Schmitt-trigger inputs in the 74LVCH245APW?
Schmitt-trigger inputs make the circuit tolerant of slower input rise and fall times.
- Does the 74LVCH245APW have any special power-down features?
Yes, it features IOFF circuitry for partial power-down mode operation.
- What is the maximum frequency at which the 74LVCH245APW can operate?
The maximum frequency is 175 MHz.
- What type of package does the 74LVCH245APW come in?
The device comes in a TSSOP20 (SOT360-1) package.
- What is the operating temperature range of the 74LVCH245APW?
The operating temperature range is from -40 °C to +125 °C.
- Does the 74LVCH245APW have ESD protection?
Yes, it has ESD protection exceeding 2000 V for HBM and 1000 V for CDM.
