SN74ALVTH16245DL

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-speed, low-voltage, 16-bit bidirectional transceiver
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Transfers data between two different voltage domains
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Number of Bits: 16
• Logic Family: ALVTH
• Voltage Supply Range: 1.65V to 3.6V
• Input/Output Compatibility: TTL, CMOS
• Output Drive Strength: ±12mA
• Propagation Delay: 2.5ns (Max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74ALVTH16245DL has a total of 48 pins, which are divided into four groups:

Group A (Pins 1-12)

• Pins 1-4: Data Inputs (A1-A4)
• Pins 5-8: Data Outputs (B1-B4)
• Pins 9-12: Enable Inputs (G1-G4)

Group B (Pins 13-24)

• Pins 13-16: Data Inputs (A5-A8)
• Pins 17-20: Data Outputs (B5-B8)
• Pins 21-24: Enable Inputs (G5-G8)

Group C (Pins 25-36)

• Pins 25-28: Data Inputs (A9-A12)
• Pins 29-32: Data Outputs (B9-B12)
• Pins 33-36: Enable Inputs (G9-G12)

Group D (Pins 37-48)

• Pins 37-40: Data Inputs (A13-A16)
• Pins 41-44: Data Outputs (B13-B16)
• Pins 45-48: Enable Inputs (G13-G16)

Functional Features

• Bidirectional data transfer between two voltage domains
• Voltage level shifting capability for mixed-voltage systems
• Non-inverting outputs with high output drive strength
• Supports hot insertion and bus-hold on data inputs
• Low power consumption and ESD protection

Advantages

• High-speed operation allows for efficient data transfer
• Wide voltage supply range enables compatibility with various systems
• Bidirectional functionality simplifies system design
• Robust ESD protection ensures reliability in harsh environments
• Small package size saves board space

Disadvantages

• Limited number of bits (16) may not be suitable for larger data buses
• Requires external pull-up or pull-down resistors for bus-hold functionality

Working Principles

The SN74ALVTH16245DL is a bidirectional level shifter and bus transceiver. It facilitates the transfer of data between two different voltage domains, such as between a microcontroller operating at 3.3V and a peripheral device operating at 1.8V. The IC uses non-inverting buffers to ensure signal integrity during bidirectional communication.

When the enable input (Gx) is high, the corresponding data inputs (Ax) are latched and transferred to the data outputs (Bx). Conversely, when the enable input is low, the data inputs are isolated from the data outputs. This enables bidirectional data flow while maintaining voltage compatibility between the two domains.

Detailed Application Field Plans

The SN74ALVTH16245DL is commonly used in various applications that require level shifting and bidirectional data transfer. Some typical application fields include:

1. Microcontroller/Peripheral Communication: Facilitating communication between microcontrollers and peripheral devices operating at different voltage levels.
2. Memory Interfaces: Connecting memory modules with different voltage requirements to a central processing unit (CPU).
3. Industrial Automation: Enabling data exchange between control systems and sensors/actuators operating at different voltages.
4. Communication Systems: Level shifting in communication interfaces, such as UART, SPI, or I2C, to ensure compatibility between devices.

Detailed and Complete Alternative Models

1. SN74ALVTH16245DGGR: Similar to SN74ALVTH16245DL but available in a different package (TSSOP-48).
2. SN74LVC245ADWR: 8-bit bidirectional level shifter and bus transceiver with similar characteristics but lower number of bits.
3. SN74HCT125N: Quad buffer/line driver with tri-state outputs, suitable for level shifting applications with fewer bits.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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