MC74LCX245DTG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Shifter
• Characteristics:
  • High-speed operation
  • Low power consumption
  • Wide voltage range compatibility
• Package: TSSOP-20
• Essence: Bidirectional voltage level translator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.3V to 3.6V
• Logic Voltage Levels:
  • High-Level Input Voltage (VIH): 2.0V to VCC + 0.5V
  • Low-Level Input Voltage (VIL): -0.5V to 0.8V
  • High-Level Output Voltage (VOH): VCC - 0.5V
  • Low-Level Output Voltage (VOL): 0.5V
• Propagation Delay: 4.5ns (max) at 3.3V supply, 20pF load
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MC74LCX245DTG has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) - Active LOW output enable input
2. I/O1 - Bidirectional data I/O pin 1
3. GND - Ground reference
4. I/O2 - Bidirectional data I/O pin 2
5. I/O3 - Bidirectional data I/O pin 3
6. I/O4 - Bidirectional data I/O pin 4
7. VCC - Positive power supply
8. DIR (Direction Control) - Direction control input
9. I/O5 - Bidirectional data I/O pin 5
10. I/O6 - Bidirectional data I/O pin 6
11. I/O7 - Bidirectional data I/O pin 7
12. I/O8 - Bidirectional data I/O pin 8
13. GND - Ground reference
14. I/O9 - Bidirectional data I/O pin 9
15. I/O10 - Bidirectional data I/O pin 10
16. I/O11 - Bidirectional data I/O pin 11
17. I/O12 - Bidirectional data I/O pin 12
18. VCC - Positive power supply
19. I/O13 - Bidirectional data I/O pin 13
20. I/O14 - Bidirectional data I/O pin 14

Functional Features

• Bidirectional voltage level translation between two different logic levels
• Supports voltage shifting from a lower voltage to a higher voltage and vice versa
• High-speed operation allows for efficient data transfer
• Low power consumption ensures energy efficiency
• Wide voltage range compatibility enables versatile applications

Advantages and Disadvantages

Advantages

• Fast propagation delay ensures quick data transmission
• Low power consumption prolongs battery life in portable devices
• Wide voltage range compatibility allows for flexible integration with various systems
• Bidirectional functionality simplifies circuit design

Disadvantages

• Limited number of bidirectional data I/O pins (14 in total)
• Requires careful consideration of voltage levels to prevent damage or incorrect data transfer

Working Principles

The MC74LCX245DTG is a bidirectional voltage level translator that facilitates communication between two logic circuits operating at different voltage levels. It utilizes a combination of MOSFETs and CMOS technology to achieve efficient and reliable voltage shifting.

When the DIR (Direction Control) input is set to a specific logic level, the IC determines the direction of data flow. The OE (Output Enable) input controls the output state, enabling or disabling the bidirectional data transfer.

The MC74LCX245DTG ensures minimal propagation delay and low power consumption, making it suitable for high-speed applications while maintaining energy efficiency.

Detailed Application Field Plans

The MC74LCX245DTG can be applied in various scenarios where voltage level translation is required. Some potential application fields include:

1. Microcontroller interfacing with different logic families
2. Communication between devices operating at different voltage levels
3. Level shifting in battery-powered portable devices
4. Industrial automation systems requiring voltage compatibility between modules
5. Sensor networks integrating sensors with varying voltage requirements

Detailed and Complete Alternative Models

• SN74LVC245A: Similar bidirectional voltage level translator with 3-state outputs
• 74HCT245: Octal bus transceiver with non-inverting 3-state outputs
• CD4508B: Dual 4-bit latch/shift register with complementary outputs

These alternative models offer similar functionality and can be considered as substitutes for the MC74LCX245DTG based on specific project requirements