Overview
The Texas Instruments SN74HCT245PWT is a high-performance, octal bus transceiver designed for asynchronous two-way communication between data buses. It is part of the HCT family, ensuring compatibility with standard CMOS outputs and TTL input switching levels. This integrated circuit is optimized for robust and reliable bidirectional communication, making it suitable for various applications requiring efficient data transmission between two buses. The device is packaged in a TSSOP (Thin Shrink Small Outline Package) with 20 pins, which is ideal for reducing space on PCBs and improving thermal performance.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | SN74HCT245PWT |
| Package Type | TSSOP-20 |
| No. of Terminals | 20 |
| Temperature Grade | Industrial (-40°C to 85°C) |
| Minimum Supply Voltage (Vsup) | 4.5 V |
| Maximum Supply Voltage (Vsup) | 5.5 V |
| Nominal Supply Voltage (Vsup) | 5 V |
| Output Characteristics | 3-state |
| Propagation Delay (tpd) | 28 ns (nominal), 38 ns (maximum) |
| Output Drive | ±6 mA at 5 V |
| Input Current | 1 µA maximum |
| Logic IC Type | BUS TRANSCEIVER |
| Technology | CMOS |
| Control Type | COMMON CONTROL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
Key Features
- Operating voltage range of 4.5 V to 5.5 V.
- High-Current 3-state outputs drive bus lines directly or up to 15-LSTTL loads.
- Low power consumption, 80-µA maximum.
- Typical propagation delay of 14 ns.
- Inputs are TTL-voltage compatible.
- Output-enable (OE) input to disable the device and isolate the buses.
- Bidirectional communication between data buses controlled by the direction-control (DIR) input.
Applications
The SN74HCT245PWT is widely used in various applications that require robust and reliable bidirectional communication between two buses. These applications include but are not limited to:
- Data transmission systems requiring asynchronous two-way communication.
- Embedded systems and microcontrollers where efficient bus communication is crucial.
- Industrial control systems that need reliable data exchange between different modules.
- Automotive and aerospace systems where high reliability and performance are essential.
Q & A
- What is the SN74HCT245PWT used for? The SN74HCT245PWT is used for bidirectional communication between data buses in various electronic systems.
- What is the operating voltage range of the SN74HCT245PWT? The operating voltage range is from 4.5 V to 5.5 V.
- What type of package does the SN74HCT245PWT come in? It comes in a TSSOP-20 package.
- What is the propagation delay of the SN74HCT245PWT? The typical propagation delay is 14 ns, with a maximum of 38 ns.
- Is the SN74HCT245PWT compatible with TTL inputs? Yes, the inputs are TTL-voltage compatible.
- What is the maximum output drive of the SN74HCT245PWT? The maximum output drive is ±6 mA at 5 V.
- Can the SN74HCT245PWT be used in industrial environments? Yes, it has an industrial temperature grade of -40°C to 85°C.
- How many terminals does the SN74HCT245PWT have? It has 20 terminals.
- What is the purpose of the direction-control (DIR) input? The direction-control (DIR) input determines the direction of data transmission between the A and B buses.
- Is the SN74HCT245PWT still in production? No, the SN74HCT245PWT is obsolete and new designs should consider an alternate product.
