Overview
The SN74HCT245NSR is an octal bus transceiver produced by Texas Instruments. This device is designed for asynchronous two-way communication between data buses, making it a versatile component in various electronic systems. It features a direction control and an active low output enable, allowing for flexible data transmission between two buses. The SN74HCT245NSR operates within a voltage range of 4.5 V to 5.5 V, which is forgiving of 5-V power supply rail accuracy, and it is compatible with TTL voltage levels.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 4.5 | 5.5 | V | |
| Output Drive Current at 5 V | ±6 | mA | ||
| Propagation Delay (tpd) at 5 V | 14 | 25 | ns | |
| Input Current (II) | 1 | µA | ||
| Supply Current (ICC) | 80 | µA | ||
| Operating Temperature Range | -40 | 85 | °C | |
| Package Type | SOP (NS) | |||
| Pins | 20 |
Key Features
- Operating voltage range of 4.5 V to 5.5 V, which is 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.
- Active low output enable (OE) and direction control (DIR) inputs.
- Inputs are TTL-voltage compatible.
- Center VCC and GND pin configurations to minimize high-speed switching noise.
Applications
- Factory Automation and Control
- Grid Infrastructure
- Electronic Point of Sale
- Multi-Function Printers
- Motor Drives
- Storage
- Telecom Infrastructure
- Backplane and ribbon cable applications where signal amplification is necessary.
Q & A
- What is the operating voltage range of the SN74HCT245NSR?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the typical propagation delay of the SN74HCT245NSR?
The typical propagation delay is 14 ns at 5 V.
- How many communication channels does the SN74HCT245NSR have?
The device has eight communication channels.
- What is the function of the output enable (OE) input?
The output enable (OE) input can be used to disable the device, putting all ports in high impedance mode when set high.
- What is the maximum supply current of the SN74HCT245NSR?
The maximum static supply current is 80 µA.
- Is the SN74HCT245NSR compatible with TTL voltage levels?
- What is the package type of the SN74HCT245NSR?
The package type is SOP (NS) with 20 pins.
- What is the operating temperature range of the SN74HCT245NSR?
The operating temperature range is from -40°C to 85°C.
- How does the SN74HCT245NSR improve signal strength in ribbon cable applications?
The device acts as a high-current drive transceiver, amplifying the signal to ensure it reaches the distant end of the ribbon cable without significant degradation.
- What are some common applications of the SN74HCT245NSR?
Common applications include factory automation, grid infrastructure, electronic point of sale, multi-function printers, motor drives, storage, and telecom infrastructure.
