SN74LVTH245APW

Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter/Transceiver
• Characteristics: Low Voltage, High-Speed, Tri-State Outputs
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Bi-directional voltage level translator/transceiver
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.7V to 3.6V
• Logic Family: LVTH
• Number of Channels: 8
• Input/Output Type: CMOS/TTL Compatible
• Output Drive Capability: ±12mA
• Propagation Delay: 4.1ns (Max)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The SN74LVTH245APW has a total of 20 pins, which are assigned as follows:

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

Functional Features

• Bi-directional voltage level translation between two different logic levels.
• Tri-state outputs allow for high impedance state when not actively driving the bus.
• CMOS/TTL compatible inputs and outputs ensure compatibility with a wide range of devices.
• High-speed operation enables efficient data transfer.

Advantages

• Wide supply voltage range allows for flexibility in various applications.
• Low power consumption makes it suitable for battery-powered devices.
• Tri-state outputs enable multi-device communication on a shared bus.
• High-speed operation ensures fast data transfer rates.

Disadvantages

• Limited number of channels may restrict its use in applications requiring more than 8 channels.
• Propagation delay may introduce timing issues in certain high-speed applications.

Working Principles

The SN74LVTH245APW is designed to translate signals between two different voltage levels, typically between a microcontroller or processor and other peripheral devices. It utilizes a combination of input/output buffers and control circuitry to achieve bi-directional voltage level translation. The DIR pin controls the direction of data flow, while the OE pins enable/disable the outputs. When the OE pins are active, the device drives the bus with the translated signals. When the OE pins are inactive, the outputs enter a high impedance state, allowing other devices to drive the bus.

Detailed Application Field Plans

The SN74LVTH245APW is commonly used in various applications, including:

1. Microcontroller/Processor Interfaces: It facilitates communication between microcontrollers or processors operating at different voltage levels.
2. Bus Level Shifting: It enables voltage level translation in bus systems, such as I2C, SPI, or UART, where multiple devices with different voltage requirements are connected.
3. Logic Level Conversion: It converts logic levels between different families, such as CMOS and TTL, ensuring compatibility between devices.
4. Data Acquisition Systems: It serves as a level shifter in data acquisition systems, allowing interfacing with sensors or analog-to-digital converters.

Detailed and Complete Alternative Models

1. SN74LVC245APW: Similar to SN74LVTH245APW but operates at a lower voltage range (1.65V to 3.6V).
2. SN74HCT245PW: A different logic family (HCT) with similar functionality but higher supply voltage range (4.5V to 5.5V).
3. SN74LVCH245APW: Another alternative with lower power consumption and wider supply voltage range (1.65V to 5.5V).

These alternative models provide options based on specific requirements, such as voltage range, power consumption, and logic family compatibility.

In conclusion, the SN74LVTH245APW is a versatile level shifter/transceiver IC that enables bi-directional voltage level translation between different logic levels. Its high-speed operation, tri-state outputs, and wide supply voltage range make it suitable for various applications