Overview
The SN74HCT245PWG4 is an octal bus transceiver with 3-state outputs, manufactured 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 isolation. The SN74HCT245PWG4 operates within a voltage range of 4.5 V to 5.5 V, which is forgiving of 5-V power supply rail accuracy. It features high-current 3-state outputs capable of driving bus lines directly or up to 15 LSTTL loads, and it has low power consumption with a maximum static supply current of 80 µA.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 5 | 5.5 | V |
| High-Level Input Voltage (VIH) | 2 | - | - | V |
| Low-Level Input Voltage (VIL) | - | - | 0.8 | V |
| Output Voltage (VO) | 0 | - | VCC | V |
| Propagation Delay Time (tpd) A or B to B or A @ VCC = 5 V | 14 | 20 | 30 | ns |
| Output Enable Time (ten) @ VCC = 5 V | 22 | 41 | 62 | ns |
| Output Disable Time (tdis) @ VCC = 5 V | 23 | 36 | 54 | ns |
| Operating Free-Air Temperature | -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.
- 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
- 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 SN74HCT245PWG4?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the maximum static supply current of the SN74HCT245PWG4?
The maximum static supply current is 80 µA.
- How many LSTTL loads can the outputs of the SN74HCT245PWG4 drive?
The outputs can drive up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HCT245PWG4?
The typical propagation delay is 14 ns.
- Are the inputs of the SN74HCT245PWG4 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 are the thermal resistance values for the TSSOP package?
The junction-to-ambient thermal resistance (RθJA) is 94.9 °C/W, and the junction-to-case (top) thermal resistance (RθJC) is 30.2 °C/W.
- What is the operating free-air temperature range for the SN74HCT245PWG4?
The operating free-air temperature range is from -40°C to 85°C.
- Can the SN74HCT245PWG4 be used in safety-critical applications?
No, it is not recommended for use in safety-critical applications. Refer to the datasheet for detailed disclaimers.
- What are some common applications of the SN74HCT245PWG4?
Common applications include factory automation, grid infrastructure, electronic point of sale, multi-function printers, motor drives, storage systems, and telecom infrastructure.
