SN74ALVTH16827DL

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Translator
• Characteristics: High-speed, low-voltage, 20-bit bus transceiver with 3-state outputs
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Translates signals between different voltage levels in digital systems
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 1.2V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 400MHz
• Number of Channels: 20
• Output Drive Strength: ±24mA
• Propagation Delay: 2.5ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74ALVTH16827DL has a total of 56 pins, which are organized as follows:

• Pins 1 to 28: A-side data inputs/outputs (A1 to A14, B1 to B14)
• Pins 29 to 42: Control inputs (OEAB, OEBA, DIR)
• Pins 43 to 56: B-side data inputs/outputs (A1 to A14, B1 to B14)

Functional Features

• Bidirectional voltage translation between two independent voltage domains
• Supports both unidirectional and bidirectional communication
• 3-state outputs allow multiple devices to share a common bus
• Provides automatic direction control based on the DIR input signal
• Low power consumption and high noise immunity

Advantages

• Wide supply voltage range allows compatibility with various systems
• High-speed operation enables efficient data transfer
• 3-state outputs facilitate bus sharing and reduce system complexity
• Low-voltage operation reduces power consumption and heat dissipation
• Robust design ensures reliable performance in harsh environments

Disadvantages

• Limited number of channels (20) may not be sufficient for complex systems
• Propagation delay may introduce timing issues in high-speed applications
• TSSOP package may require careful handling during assembly

Working Principles

The SN74ALVTH16827DL utilizes a combination of MOSFETs and CMOS technology to achieve bidirectional voltage translation. It employs level-shifting circuitry to convert signals between two different voltage domains, allowing seamless communication between devices operating at different logic levels.

The direction of data flow is controlled by the DIR input signal. When DIR is low, data is transferred from the A-side to the B-side, and when DIR is high, data flows from the B-side to the A-side. The OEAB and OEBA control inputs enable or disable the outputs, providing 3-state functionality.

Detailed Application Field Plans

The SN74ALVTH16827DL is commonly used in various digital systems where voltage translation is required. Some typical application fields include:

1. Microcontrollers and microprocessors: Facilitates communication between devices operating at different voltage levels, such as connecting a low-voltage microcontroller to a higher-voltage peripheral.
2. Communication interfaces: Enables compatibility between different interface standards, such as translating between 3.3V and 5V logic levels in UART, SPI, or I2C interfaces.
3. Memory modules: Allows interfacing between memory chips operating at different voltage levels, ensuring proper data transfer between them.
4. Industrial automation: Provides voltage translation capabilities in industrial control systems, allowing integration of components with varying voltage requirements.

Detailed and Complete Alternative Models

1. SN74LVC1T45DBVR: Single-bit voltage level translator with 3-state output, operating at 1.65V to 5.5V.
2. TXB0104PWR: Quad-bit bidirectional voltage level translator with 3-state output, supporting voltage levels from 1.2V to 3.6V.
3. PCA9306DCUR: Dual-bit I2C-bus/SMBus voltage level translator with automatic direction control, compatible with 1.2V to 3.6V systems.

These alternative models offer similar functionality and can be considered as substitutes for the SN74ALVTH16827DL in different applications.

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