Overview
The SN74HC245DWRG4, produced by Texas Instruments, is an octal bus transceiver with 3-state outputs. This integrated circuit is designed to facilitate data transmission between two buses, A and B, with the ability to control the direction of data flow and isolate the buses when necessary. It operates within a wide voltage range of 2 V to 6 V, making it versatile for various applications. The device is available in a 20-pin SOIC package, ensuring compact integration into electronic systems.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V |
| VIH High-Level Input Voltage (VCC = 2 V) | 1.5 | 1.5 | V | |
| VIH High-Level Input Voltage (VCC = 4.5 V) | 3.15 | 3.15 | V | |
| VIH High-Level Input Voltage (VCC = 6 V) | 4.2 | 4.2 | V | |
| VIL Low-Level Input Voltage (VCC = 2 V) | 0.5 | 0.5 | V | |
| VIL Low-Level Input Voltage (VCC = 4.5 V) | 1.35 | 1.35 | V | |
| VIL Low-Level Input Voltage (VCC = 6 V) | 1.8 | 1.8 | V | |
| TA Operating Free-Air Temperature | -40 | 85 | °C | |
| IO Continuous Output Current | ±35 | mA | ||
| RθJA Junction-to-Ambient Thermal Resistance (SOIC) | 77.0 | °C/W |
Key Features
- Wide operating voltage range of 2 V to 6 V, allowing for flexibility in different system designs.
- High-current 3-state outputs capable of driving bus lines directly or up to 15 LSTTL loads.
- Direction control (DIR) input to select the direction of data transmission between the A and B buses.
- Output enable (OE) input to isolate the buses when necessary.
- Compact 20-pin SOIC package for efficient board space utilization.
- Operating temperature range from -40°C to 85°C, suitable for various environmental conditions.
Applications
The SN74HC245DWRG4 is suitable for a variety of applications where data needs to be transmitted between two buses. These include:
- Computer peripherals and interfaces.
- Industrial control systems.
- Communication equipment.
- Embedded systems requiring bus communication.
- Any system requiring bidirectional data transmission with control over the direction and isolation of the buses.
Q & A
- What is the operating voltage range of the SN74HC245DWRG4?
The operating voltage range is from 2 V to 6 V. - How many pins does the SN74HC245DWRG4 have?
The device has 20 pins. - What is the purpose of the DIR input?
The DIR input controls the direction of data transmission between the A and B buses. - What is the function of the OE input?
The OE input can be used to disable the device and isolate the buses. - What is the maximum continuous output current?
The maximum continuous output current is ±35 mA. - What is the operating temperature range of the SN74HC245DWRG4?
The operating temperature range is from -40°C to 85°C. - In what package is the SN74HC245DWRG4 available?
The device is available in a 20-pin SOIC package. - Can the SN74HC245DWRG4 drive LSTTL loads?
Yes, it can drive up to 15 LSTTL loads. - What is the junction-to-ambient thermal resistance for the SOIC package?
The junction-to-ambient thermal resistance is 77.0 °C/W. - Why is it important to hold unused inputs at VCC or GND?
It is important to ensure proper device operation and prevent unintended behavior.
