Overview
The SN74HCT245PWRE4 is an octal bus transceiver produced by Texas Instruments, designed for asynchronous two-way communication between data buses. This device is part of the 74HCT series and is widely used in logic systems for isolation and increasing drive strength. It features a direction control and an active low output enable, allowing flexible data transmission between the A and B buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 4.5 to 5.5 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | 20-TSSOP (4.4mm W) | |
| Number of Bits per Element | 8 | |
| Output Type | 3-State | |
| Maximum Static Supply Current | 80 | µA |
| Typical Propagation Delay | 14 | ns |
| Output Drive | ±6 | mA at 5 V |
| Input Current | 1 | µA maximum |
| Load Capability | Up to 15 LSTTL loads |
Key Features
- Operating voltage range of 4.5 V to 5.5 V, forgiving of 5-V power supply rail accuracy.
- High-Current 3-state outputs capable of driving bus lines directly or up to 15 LSTTL loads.
- Low power consumption with a maximum static supply current of 80 µA.
- Typical propagation delay of 14 ns and balanced output drive of ±6 mA at 5 V.
- Inputs are TTL-voltage compatible.
- Active low output enable and direction control for flexible data transmission.
- Center VCC and GND pin configurations to minimize high-speed switching noise.
Applications
The SN74HCT245PWRE4 is commonly used in various logic systems for isolation and increasing drive strength. It is suitable for asynchronous two-way communication between data buses, making it a versatile component in digital circuits, microprocessor systems, and other applications requiring reliable bus communication.
Q & A
- What is the operating voltage range of the SN74HCT245PWRE4?
The operating voltage range is from 4.5 V to 5.5 V. - What is the package type of the SN74HCT245PWRE4?
The package type is 20-TSSOP (4.4mm W). - What is the typical propagation delay of the SN74HCT245PWRE4?
The typical propagation delay is 14 ns. - How many bits per element does the SN74HCT245PWRE4 support?
The device supports 8 bits per element. - What is the output type of the SN74HCT245PWRE4?
The output type is 3-State. - What is the maximum static supply current of the SN74HCT245PWRE4?
The maximum static supply current is 80 µA. - Can the SN74HCT245PWRE4 drive LSTTL loads?
Yes, it can drive up to 15 LSTTL loads. - Are the inputs of the SN74HCT245PWRE4 TTL-voltage compatible?
Yes, the inputs are TTL-voltage compatible. - What is the purpose of the direction control and output enable inputs?
The direction control input determines the direction of data transmission between the A and B buses, and the output enable input can be used to disable the device and isolate the buses. - What is the operating temperature range of the SN74HCT245PWRE4?
The operating temperature range is from -40°C to 85°C.
