Overview
The SN74HCT245PWR, produced by Texas Instruments, is an octal bus transceiver designed for asynchronous two-way communication between data buses. This device is part of the 74HCT series, which is TTL-voltage compatible and operates within a voltage range of 4.5 V to 5.5 V. It features high-current 3-state outputs, low power consumption, and balanced propagation delays, making it suitable for various logic systems requiring bus communication and isolation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 4.5 V to 5.5 V | V |
| Output Drive Capability | Up to 15 LSTTL loads | - |
| Output Current Drive | ±6 mA at 5 V | mA |
| Input Current | 1 µA maximum | µA |
| Propagation Delay (typical) | 14 ns | ns |
| Static Supply Current (maximum) | 80 µA | µA |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | TSSOP (PW) | - |
| Number of Pins | 20 | - |
Key Features
- Operating voltage range of 4.5 V to 5.5 V, making it forgiving of 5-V power supply rail accuracy.
- High-current 3-state outputs that can drive 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.
- Inputs are TTL-voltage compatible.
- Active low output enable (OE) and direction control (DIR) inputs for flexible data transmission.
- Center VCC and GND pin configurations to minimize high-speed switching noise.
Applications
The SN74HCT245PWR is commonly used in logic systems that require two-way asynchronous communication between data buses. It is particularly useful for:
- Bus isolation and increasing drive strength in digital circuits.
- Asynchronous data transmission in microprocessor and microcontroller systems.
- Peripheral interface circuits where data needs to be transmitted bidirectionally.
- General-purpose logic circuits requiring high-speed and low-power operation.
Q & A
- What is the operating voltage range of the SN74HCT245PWR?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the maximum output drive capability of the SN74HCT245PWR?
The device can drive up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HCT245PWR?
The typical propagation delay is 14 ns.
- How much power does the SN74HCT245PWR consume?
The maximum static supply current is 80 µA.
- What is the operating temperature range of the SN74HCT245PWR?
The operating temperature range is from -40°C to 85°C).
- What package type is the SN74HCT245PWR available in?
The device is available in a TSSOP (PW) package).
- How many pins does the SN74HCT245PWR have?
The device has 20 pins).
- What are the control inputs for the SN74HCT245PWR?
The device has an active low output enable (OE) and a direction control (DIR) input).
- Are the inputs of the SN74HCT245PWR TTL-voltage compatible?
Yes, the inputs are TTL-voltage compatible).
- What is the purpose of the center VCC and GND pin configurations?
The center VCC and GND pin configurations minimize high-speed switching noise).
