Overview
The CD74HC245M is a high-speed CMOS logic octal-bus transceiver produced by Texas Instruments. This device is designed for 2-way asynchronous communication between data buses and is part of the HC family, known for its high performance and low power consumption. The CD74HC245M is available in a 20-pin SOIC (Small Outline Integrated Circuit) package and is RoHS and REACH compliant, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC-20 | |
| Number of Bits | 8 | |
| Number of Terminals | 20 | |
| Supply Voltage Range | 2.0 to 6.0 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Propagation Delay (A to B, B to A) | 9 to 28 | ns |
| Input Current | 1.0 | μA |
| Output Drive Capability | 15 LSTTL Loads | |
| Output Characteristics | 3-State | |
| ESD Performance | HBM: 2000 V, Machine Model: 200 V |
Key Features
- Buffered inputs and three-state outputs
- Bus line driving capability
- Compatible with CMOS, NMOS, and TTL outputs
- Low input current and high noise immunity characteristic of CMOS devices
- Active-low Output Enable pin to place I/O ports into high-impedance states
- Direction control determines data flow direction (A to B or B to A)
- Pb-free package
- Compliant with JEDEC Standard No. 7A
Applications
The CD74HC245M is widely used in various electronic systems that require reliable and efficient data transmission between different bus lines. Some common applications include:
- Data communication systems
- Computer peripherals and interfaces
- Industrial control systems
- Embedded systems and microcontrollers
- Telecommunication equipment
Q & A
- What is the primary function of the CD74HC245M?
The CD74HC245M is an octal-bus transceiver used for 2-way asynchronous communication between data buses.
- What is the package type of the CD74HC245M?
The CD74HC245M is available in a 20-pin SOIC (Small Outline Integrated Circuit) package.
- What is the operating voltage range of the CD74HC245M?
The operating voltage range is from 2.0 to 6.0 volts.
- What is the propagation delay of the CD74HC245M?
The propagation delay ranges from 9 to 28 nanoseconds depending on the supply voltage.
- Is the CD74HC245M RoHS and REACH compliant?
- How does the direction control work on the CD74HC245M?
The direction control determines whether data flows from bus A to bus B or from bus B to bus A, controlled by the DIR pin.
- What is the purpose of the Output Enable (OE) pin?
The Output Enable (OE) pin, when high, places the I/O ports into a high-impedance state.
- What are the typical applications of the CD74HC245M?
Typical applications include data communication systems, computer peripherals, industrial control systems, embedded systems, and telecommunication equipment.
- Is the CD74HC245M compatible with other logic families?
- What is the ESD performance of the CD74HC245M?
The ESD performance is HBM: 2000 V, Machine Model: 200 V.
