Overview
The SN74HC245DWR is an octal bus transceiver produced by Texas Instruments. It is designed for asynchronous two-way communication between data buses, allowing data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The device features an output-enable (OE) input that can be used to disable the device, effectively isolating the buses. This implementation minimizes external timing requirements, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2 to 6 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | SOIC (DW) | - |
| Number of Pins | 20 | - |
| Maximum Input Current | 1 | µA |
| Maximum Power Consumption | 80 | µA |
| Typical Propagation Delay (tpd) | 12 | ns |
| Output Drive at 5 V | ±6 | mA |
| Continuous Output Current | ±35 | mA |
Key Features
- Wide Operating Voltage Range of 2 V to 6 V
- High-Current 3-State Outputs Drive Bus Lines Directly or Up to 15 LSTTL Loads
- Low Power Consumption, 80-µA Max ICC
- Typical Propagation Delay (tpd) of 12 ns
- ±6-mA Output Drive at 5 V
- Low Input Current of 1 µA Max
- Output-enable (OE) input to disable the device and isolate the buses
Applications
The SN74HC245DWR is suitable for a variety of digital circuit applications, including:
- Asynchronous two-way communication between data buses
- Data transmission in microprocessor and microcontroller systems
- Bus isolation and control in complex digital systems
- General-purpose digital logic circuits requiring high-current 3-state outputs
Q & A
- What is the operating voltage range of the SN74HC245DWR?
The operating voltage range is from 2 V to 6 V.
- What is the typical propagation delay (tpd) of the SN74HC245DWR?
The typical propagation delay is 12 ns.
- How many LSTTL loads can the high-current 3-state outputs drive?
The high-current 3-state outputs can drive up to 15 LSTTL loads.
- What is the maximum input current of the SN74HC245DWR?
The maximum input current is 1 µA.
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input can be used to disable the device, effectively isolating the buses.
- What is the package type of the SN74HC245DWR?
The package type is SOIC (DW).
- How many pins does the SN74HC245DWR have?
The device has 20 pins.
- What is the maximum power consumption of the SN74HC245DWR?
The maximum power consumption is 80 µA.
- What is the output drive capability at 5 V?
The output drive capability at 5 V is ±6 mA.
- What is the operating temperature range of the SN74HC245DWR?
The operating temperature range is from -40°C to 85°C.
