CD74AC245SM96G4

Product Overview

• Category: Integrated Circuit
• Use: Signal Level Shifter
• Characteristics: High-Speed, Bi-Directional, Octal Bus Transceiver
• Package: Surface Mount SOIC-20
• Essence: The CD74AC245SM96G4 is a high-performance integrated circuit that provides bi-directional level shifting between two different voltage domains. It is commonly used in digital systems where signals need to be transmitted between devices operating at different voltage levels.
• Packaging/Quantity: The CD74AC245SM96G4 is typically packaged in reels and comes in quantities of 2500 units per reel.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Levels: 0V to VCC
• Output Voltage Levels: 0V to VCC
• Propagation Delay: 5ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74AC245SM96G4 has a total of 20 pins, which are assigned specific functions as follows:

1. OE (Output Enable) - Active Low Output Enable
2. DIR (Direction Control) - Controls the direction of data flow
3. A1-A8 (Data Inputs/Outputs) - Bi-directional data lines
4. GND (Ground) - Ground reference
5. B1-B8 (Data Inputs/Outputs) - Bi-directional data lines
6. VCC (Power Supply) - Positive power supply

Functional Features

• Bi-directional data transfer: The CD74AC245SM96G4 allows for bidirectional data transfer between two voltage domains, enabling seamless communication between devices operating at different voltage levels.
• High-speed operation: With a propagation delay of just 5ns, this IC ensures fast and efficient data transmission.
• Output enable control: The OE pin allows for the enabling or disabling of the outputs, providing flexibility in controlling the data flow.
• Direction control: The DIR pin determines the direction of data transfer, allowing for easy configuration of the IC based on system requirements.

Advantages and Disadvantages

Advantages

• Efficient level shifting: The CD74AC245SM96G4 provides reliable and efficient level shifting between voltage domains, ensuring accurate data transmission.
• High-speed operation: With its low propagation delay, this IC is suitable for high-speed digital systems.
• Compact package: The SOIC-20 package offers a compact form factor, making it suitable for space-constrained applications.

Disadvantages

• Limited voltage range: The CD74AC245SM96G4 operates within a supply voltage range of 2V to 6V, which may not be suitable for all voltage domain configurations.
• Surface mount package: The surface mount package may require specialized equipment for soldering and rework.

Working Principles

The CD74AC245SM96G4 utilizes a combination of CMOS and TTL technologies to achieve bi-directional level shifting. It employs a set of internal circuitry that allows bidirectional data transfer while maintaining signal integrity and minimizing propagation delay.

When the DIR pin is set to a specific logic level, the CD74AC245SM96G4 determines the direction of data flow. When the DIR pin is high, data is transferred from the A-side to the B-side, and when the DIR pin is low, data is transferred from the B-side to the A-side.

The OE pin controls the output enable function. When the OE pin is low, the outputs are enabled, allowing data to be transmitted. Conversely, when the OE pin is high, the outputs are disabled, effectively isolating the input and output sides.

Detailed Application Field Plans

The CD74AC245SM96G4 is widely used in various digital systems where level shifting between different voltage domains is required. Some common application fields include:

1. Microcontroller interfacing: The IC enables communication between microcontrollers operating at different voltage levels, facilitating seamless integration into complex systems.
2. Memory interfaces: It is commonly used in memory modules to enable data transfer between memory devices operating at different voltage levels.
3. Communication systems: The CD74AC245SM96G4 plays a crucial role in communication systems, allowing for signal level translation between different components such as transceivers, controllers, and sensors.

Detailed and Complete Alternative Models

• SN74LV245A: Low-Voltage Octal Bus Transceiver
• MC74VHC245: High-Speed CMOS Octal Bus Transceiver
• 74HCT245: Octal Bus Transceiver with 3-State Outputs
• CD74HCT245E: High-Speed CMOS Octal Bus Transceiver

These alternative models offer similar functionality to the CD74AC245SM96G4 and