Overview
The SN74HC245PWRG4, 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, under the control of a direction signal. The device features a wide operating voltage range and high-current 3-state outputs, making it versatile for various digital logic applications.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC Supply Voltage | -0.5 | 7 | V |
| Input Clamp Current (VI < 0 or VI > VCC) | -20 | 20 | mA |
| Output Clamp Current (VO < 0 or VO > VCC) | -20 | 20 | mA |
| Continuous Output Current (VO = 0 to VCC) | -35 | 35 | mA |
| Continuous Current through VCC or GND | -70 | 70 | mA |
| Storage Temperature | -65 | 150 | °C |
| Junction Temperature | - | 150 | °C |
| Operating Voltage Range | 2 | 6 | V |
| Package Type | TSSOP, 20-pin | - | - |
| Package Size | 6.50 mm × 4.40 mm | - | - |
Key Features
- Wide Operating Voltage Range: The device operates over a voltage range of 2 V to 6 V, making it suitable for a variety of applications.
- High-Current 3-State Outputs: Capable of driving bus lines directly or up to 15 LSTTL loads.
- Output Enable (OE) Input: Allows the device to be disabled, effectively isolating the buses.
- Direction Control (DIR) Input: Controls the direction of data transmission between the A and B buses.
- Low Power Consumption: Designed to minimize power usage while maintaining high performance.
- High-Impedance State During Power-Up/Down: Ensures that the outputs are in a high-impedance state during power-up or power-down to prevent bus contention.
Applications
- Bus Systems: Ideal for use in bus systems where data needs to be transmitted between different segments.
- Microprocessor Systems: Used in microprocessor systems to manage data transfer between the microprocessor and peripheral devices.
- Memory Interfaces: Suitable for memory interfaces where data needs to be transferred between memory modules and the system bus.
- Peripheral Devices: Can be used with various peripheral devices such as keyboards, displays, and other I/O devices.
Q & A
- What is the operating voltage range of the SN74HC245PWRG4?
The operating voltage range is from 2 V to 6 V.
- What is the function of the Output Enable (OE) input?
The OE input allows the device to be disabled, effectively isolating the buses.
- How does the Direction Control (DIR) input work?
The DIR input controls the direction of data transmission between the A and B buses.
- What is the maximum continuous output current?
The maximum continuous output current is ±35 mA.
- What is the storage temperature range for the SN74HC245PWRG4?
The storage temperature range is from -65°C to 150°C.
- What type of package does the SN74HC245PWRG4 come in?
The device comes in a 20-pin TSSOP package.
- Can the SN74HC245PWRG4 drive LSTTL loads?
Yes, it can drive up to 15 LSTTL loads.
- How does the device ensure a high-impedance state during power-up or power-down?
The OE input should be tied to VCC through a pullup resistor to ensure a high-impedance state.
- What are some common applications of the SN74HC245PWRG4?
Common applications include bus systems, microprocessor systems, memory interfaces, and peripheral devices.
- What is the maximum junction temperature for the SN74HC245PWRG4?
The maximum junction temperature is 150°C.
