Overview
The SN74HCT245NS is an octal bus transceiver produced by Texas Instruments. This device is designed for asynchronous two-way communication between data buses, making it ideal for various applications requiring data transmission and bus isolation. The SN74HCT245NS operates within a voltage range of 4.5 V to 5.5 V and is compatible with TTL voltage levels, ensuring versatility in different logic systems.
The device features an active low output enable (OE) and a direction control (DIR) input, allowing for flexible control over data transmission directions. It is built using CMOS technology, which provides low power consumption and balanced output drive capabilities.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 4.5 | - | 5.5 | V |
| Supply Current (ICC) | - | - | 80 | µA |
| Output Drive Current | - | ±6 | - | mA |
| Propagation Delay (tpd) | 14 | - | 30 | ns |
| Input Current | - | - | 1 | µA |
| Output Enable Time (ten) | 22 | - | 62 | ns |
| Output Disable Time (tdis) | 23 | - | 54 | ns |
| Operating Temperature Range | -40 | - | 85 | °C |
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 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 (OE) and direction control (DIR) input for flexible data transmission control.
- 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 Systems
- Telecom Infrastructure
Q & A
- What is the operating voltage range of the SN74HCT245NS?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the maximum supply current of the SN74HCT245NS?
The maximum supply current (ICC) is 80 µA.
- How many LSTTL loads can the SN74HCT245NS drive?
The device can drive up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HCT245NS?
The typical propagation delay (tpd) is 14 ns.
- What is the purpose of the direction control (DIR) input?
The DIR input controls the direction of data transmission between the A and B buses.
- What is the function of the active low output enable (OE) input?
The OE input can be used to disable the device, putting all ports in a high impedance state.
- What are the compatible input voltage levels for the SN74HCT245NS?
The inputs are TTL-voltage compatible.
- What is the operating temperature range of the SN74HCT245NS?
The operating temperature range is from -40°C to 85°C.
- How does the SN74HCT245NS minimize high-speed switching noise?
The center VCC and GND pin configurations help minimize high-speed switching noise.
- What are some common applications of the SN74HCT245NS?
Common applications include factory automation, grid infrastructure, electronic point of sale, multi-function printers, motor drives, storage systems, and telecom infrastructure.
