SN74LVCH245APW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: This IC is designed to shift logic levels and provide bidirectional communication between two buses operating at different voltage levels.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• 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: ±32mA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74LVCH245APW has a total of 20 pins, which are assigned specific functions as follows:

1. OE (Output Enable) - Active low output enable input
2. A1 - Data bus input/output 1
3. B1 - Data bus input/output 1
4. A2 - Data bus input/output 2
5. B2 - Data bus input/output 2
6. A3 - Data bus input/output 3
7. B3 - Data bus input/output 3
8. A4 - Data bus input/output 4
9. B4 - Data bus input/output 4
10. GND (Ground) - Ground reference
11. B5 - Data bus input/output 5
12. A5 - Data bus input/output 5
13. B6 - Data bus input/output 6
14. A6 - Data bus input/output 6
15. B7 - Data bus input/output 7
16. A7 - Data bus input/output 7
17. B8 - Data bus input/output 8
18. A8 - Data bus input/output 8
19. VCC - Positive power supply
20. DIR (Direction Control) - Direction control input

Functional Features

• Bidirectional voltage-level translation between two buses operating at different voltage levels.
• 3-state outputs allow the IC to be disconnected from the bus when not in use.
• Low-voltage CMOS technology enables operation with a wide supply voltage range.
• High-speed operation ensures efficient data transfer.

Advantages and Disadvantages

Advantages: - Enables communication between buses with different voltage levels. - Supports bidirectional data transfer. - 3-state outputs provide flexibility in bus connection. - Wide supply voltage range allows for versatile applications.

Disadvantages: - May require additional external components for proper level shifting in certain applications. - Limited maximum output current may restrict usage in high-current scenarios.

Working Principles

The SN74LVCH245APW operates by receiving data on one set of pins (A1-A8) and transmitting it to another set of pins (B1-B8), or vice versa, depending on the direction control input (DIR). The output enable input (OE) controls the 3-state outputs, allowing the IC to be connected or disconnected from the bus. The low-voltage CMOS technology ensures reliable operation across a wide supply voltage range.

Detailed Application Field Plans

The SN74LVCH245APW is commonly used in various applications, including:

1. Level shifting between microcontrollers and peripheral devices operating at different voltage levels.
2. Interface conversion between different logic families, such as TTL and CMOS.
3. Bus transceiver in communication systems, such as UART, SPI, or I2C interfaces.
4. Voltage-level translation in battery-powered devices with low-power requirements.

Detailed and Complete Alternative Models

1. SN74LVC245APW - Similar to SN74LVCH245APW but operates at a slightly higher voltage range (1.65V to 3.6V).
2. SN74HCT245PW - Compatible with TTL logic levels and operates at a wider temperature range (-55°C to 125°C).
3. SN74LVTH245APW - Provides additional output drive strength for applications requiring higher current capabilities.

These alternative models offer similar functionality to the SN74LVCH245APW but may have differences in voltage range, temperature range, or output characteristics. It is important to select the appropriate model based on specific application requirements.

Word count: 530 words