74LCX245MTC

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter/Transceiver
• Characteristics: Low Voltage, Bi-directional, Octal Bus Transceiver
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Logic Level Translator
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.3V to 3.6V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.5V
• Maximum Input Current: ±10mA
• Maximum Output Current: ±24mA
• Propagation Delay Time: 4.5ns (Max) at 3.3V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74LCX245MTC has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) - Active Low Output Enable
2. DIR (Direction Control) - Direction Control Input
3. A1 - Data Input/Output
4. B1 - Data Input/Output
5. A2 - Data Input/Output
6. B2 - Data Input/Output
7. A3 - Data Input/Output
8. B3 - Data Input/Output
9. A4 - Data Input/Output
10. B4 - Data Input/Output
11. GND (Ground) - Ground Reference
12. B5 - Data Input/Output
13. A5 - Data Input/Output
14. B6 - Data Input/Output
15. A6 - Data Input/Output
16. B7 - Data Input/Output
17. A7 - Data Input/Output
18. B8 - Data Input/Output
19. A8 - Data Input/Output
20. VCC (Supply Voltage) - Positive Supply Voltage

Functional Features

• Bi-directional data transfer between two different voltage domains.
• 8-bit wide bidirectional bus interface.
• Provides voltage level translation from 2.3V to 3.6V.
• Supports both push-pull and three-state outputs.
• Low power consumption.
• Schmitt-trigger inputs for noise immunity.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Bi-directional functionality simplifies data communication between different voltage levels. - Low power consumption makes it suitable for battery-powered devices. - Schmitt-trigger inputs provide improved noise immunity.

Disadvantages: - Limited to a maximum of 8-bit data width. - Not suitable for high-speed applications due to relatively slow propagation delay.

Working Principles

The 74LCX245MTC is a level shifter/transceiver IC that enables bidirectional data transfer between two voltage domains. It uses a combination of CMOS and TTL logic to achieve voltage level translation. The DIR pin controls the direction of data flow, while the OE pin enables or disables the outputs. When the OE pin is low, the outputs are active, allowing data transmission. Conversely, when the OE pin is high, the outputs are in a high-impedance state.

Detailed Application Field Plans

The 74LCX245MTC is commonly used in various applications where there is a need to interface between different voltage domains. Some typical application fields include:

1. Microcontroller interfacing with different logic families.
2. Communication systems involving multiple voltage levels.
3. Data acquisition systems with mixed voltage sensors.
4. Battery-powered devices requiring level shifting.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar octal bus transceiver with a wider supply voltage range of 1.65V to 5.5V.
2. MC74LVX245: Octal bidirectional transceiver with a supply voltage range of 2.0V to 3.6V.
3. CD74HCT245: High-speed octal bus transceiver compatible with TTL logic levels.

These alternative models offer similar functionality but may have different specifications and package options.

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