Overview
The SN74LVT245BDWR is a 3.3-V Advanced Bus Technology (ABT) octal bus transceiver with 3-state outputs, manufactured by Texas Instruments. This device is designed for asynchronous two-way communication between data buses, making it suitable for a variety of digital systems that require reliable and efficient data transmission.
The SN74LVT245BDWR uses advanced transistor logic to perform the standard '245 transceiver function, featuring a common pinout, direction select pin, and active-low output enable. This allows for flexible control over data transmission and output states.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | 3.0 | 3.6 | V | ||
| VIH (High-level Input Voltage) | VCC = MIN | 2.0 | V | ||
| VIL (Low-level Input Voltage) | VCC = MIN | 0.8 | V | ||
| VOH (High-level Output Voltage) | VCC = MIN, IOL = 12 mA | 2.4 | 3.4 | V | |
| VOL (Low-level Output Voltage) | VCC = MIN, IOL = 12 mA | 0.4 | 0.5 | V | |
| IOH (Source Current) | VCC = MIN, VOH = 2.4 V | -12 | -15 | mA | |
| IOL (Sink Current) | VCC = MIN, VOL = 0.4 V | 12 | 24 | mA | |
| Operating Temperature | -40 | 85 | °C |
Key Features
- 3-State Outputs: The outputs can drive bus lines directly and can be put into high impedance mode through the OE pin.
- PNP Inputs: Reduces DC loading on bus lines, improving overall system efficiency.
- Hysteresis on Bus Inputs: Built-in hysteresis improves noise margins, ensuring more reliable data transmission.
- Direction Control and Output Enable: The device features a direction select pin (DIR) and an active-low output enable pin (OE), allowing for flexible control over data transmission and output states.
- Advanced Bus Technology (ABT): Designed to support high-speed data transmission with low power consumption.
Applications
- Data Communication Systems: Ideal for asynchronous two-way communication between data buses in various digital systems.
- Embedded Systems: Suitable for use in embedded systems that require reliable and efficient data transmission.
- Industrial Automation: Can be used in industrial automation systems where robust and reliable data communication is critical.
- Consumer Electronics: Applicable in consumer electronics that require high-speed data transmission and low power consumption.
Q & A
- What is the primary function of the SN74LVT245BDWR?
The primary function of the SN74LVT245BDWR is to facilitate asynchronous two-way communication between data buses.
- What is the operating voltage range for the SN74LVT245BDWR?
The operating voltage range is from 3.0 V to 3.6 V.
- What are the key features of the SN74LVT245BDWR?
The key features include 3-state outputs, PNP inputs, hysteresis on bus inputs, and advanced bus technology.
- How does the direction control work on the SN74LVT245BDWR?
The direction control is managed by the DIR pin, which determines whether data is transmitted from A to B or from B to A.
- What is the purpose of the OE pin on the SN74LVT245BDWR?
The OE pin is an active-low output enable pin that can put all outputs into high impedance mode when set high.
- What are the typical applications of the SN74LVT245BDWR?
Typical applications include data communication systems, embedded systems, industrial automation, and consumer electronics.
- How does the SN74LVT245BDWR handle noise on the bus inputs?
The device has built-in hysteresis on bus inputs, which improves noise margins and ensures more reliable data transmission.
- What is the maximum operating temperature for the SN74LVT245BDWR?
The maximum operating temperature is 85°C.
- Can the SN74LVT245BDWR be used in partial-power-down applications?
Yes, the device is designed to support partial-power-down applications with appropriate control of the OE pin and power supply.
- What are the package options available for the SN74LVT245BDWR?
The device is available in various packages such as SSOP, TSSOP, TVSOP, and VQFN.
