Overview
The SN74HCT245N is an octal bus transceiver produced by Texas Instruments, designed for asynchronous two-way communication between data buses. This device is part of the SNx4HCT245 series and is optimized for high-speed data transfer applications. It features advanced logic integration, fast switching speeds, and a compact package design, making it suitable for various industries such as industrial control, automotive, and telecommunications.
The SN74HCT245N operates within a voltage range of 4.5 V to 5.5 V and is TTL-voltage compatible, allowing it to integrate seamlessly with existing TTL-based systems. The device includes an active low output enable and a direction control input, enabling flexible data transmission between two buses (A and B). Its high-current 3-state outputs can drive bus lines directly or up to 15 LSTTL loads, ensuring robust signal integrity over long distances.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5.5 | V | |
| Number of Channels | 8 | |||
| Output Drive (IOL/Ioh) | ±6 | mA | ||
| Input Current (II) | 1 | µA | ||
| Propagation Delay (tpd) | 14 | 25 | ns | |
| Supply Current (ICC) | 80 | µA | ||
| Operating Temperature Range | -40 | 85 | °C | |
| Package Type | PDIP-20 |
Key Features
- Operating voltage range of 4.5 V to 5.5 V, tolerant 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.
- Low input current of 1 µA maximum and TTL-voltage compatible inputs.
- Active low output enable and direction control input for flexible data transmission.
- Compact package design in a 20-pin PDIP, minimizing high-speed switching noise.
Applications
- Factory Automation and Control
- Grid Infrastructure
- Electronic Point of Sale
- Multi-Function Printers
- Motor Drives
- Storage Systems
- Telecom Infrastructure
The SN74HCT245N is particularly useful in scenarios where high-speed data transfer over long distances is required, such as in industrial control systems, automotive applications, and telecommunications equipment.
Q & A
- What is the operating voltage range of the SN74HCT245N?
The operating voltage range is from 4.5 V to 5.5 V.
- How many channels does the SN74HCT245N have?
The device has 8 channels.
- What is the typical propagation delay of the SN74HCT245N?
The typical propagation delay is 14 ns.
- What is the maximum output drive current of the SN74HCT245N?
The maximum output drive current is ±6 mA at 5 V.
- What is the maximum supply current of the SN74HCT245N?
The maximum supply current is 80 µA.
- What is the package type of the SN74HCT245N?
The package type is PDIP-20.
- What are the typical applications of the SN74HCT245N?
Typical applications include factory automation, grid infrastructure, electronic point of sale, multi-function printers, motor drives, storage systems, and telecom infrastructure.
- How does the SN74HCT245N handle data transmission between buses?
The device allows 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 output-enable (OE) input can be used to disable the device and isolate the buses.
- Is the SN74HCT245N TTL-voltage compatible?
Yes, the inputs are TTL-voltage compatible.
- What is the operating temperature range of the SN74HCT245N?
The operating temperature range is from -40°C to 85°C.
