SN74LVTH646DGVR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-speed, low-voltage, 3-state output, bidirectional
• Package: VFBGA (Very Thin Fine-Pitch Ball Grid Array)
• Essence: Translates signals between different voltage levels in digital systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 2.5ns (Max)
• Output Drive Capability: ±24mA
• Number of Channels: 8

Detailed Pin Configuration

The SN74LVTH646DGVR has a total of 56 pins, which are distributed as follows:

• Pins 1 to 8: Channel A Data Inputs/Outputs (D1-D8)
• Pins 9 to 16: Channel B Data Inputs/Outputs (D1-D8)
• Pins 17 to 24: Channel Enable Inputs (OE1-OE8)
• Pins 25 to 32: Channel Direction Control Inputs (DIR1-DIR8)
• Pins 33 to 40: Supply Voltage (VCC and GND)
• Pins 41 to 48: Channel A Output Enable Inputs (OEA1-OEA8)
• Pins 49 to 56: Channel B Output Enable Inputs (OEB1-OEB8)

Functional Features

• Bidirectional level shifting between two voltage domains
• 3-state outputs allow multiple devices to share a common bus
• Automatic direction control based on DIR inputs
• Output enable control for individual channels
• High-speed operation suitable for high-frequency applications
• Low-voltage operation reduces power consumption

Advantages and Disadvantages

Advantages

• Supports voltage translation between different logic families
• Wide supply voltage range allows compatibility with various systems
• 3-state outputs enable bus sharing and reduce contention issues
• Fast propagation delay ensures efficient data transfer
• Small package size saves board space

Disadvantages

• Limited number of channels (8 in this case)
• Requires careful consideration of voltage levels and compatibility

Working Principles

The SN74LVTH646DGVR is designed to translate signals between two voltage domains in digital systems. It operates bidirectionally, allowing data to flow in both directions. The direction of data transfer is controlled by the DIR inputs. When a channel's DIR input is set to logic high, data flows from Channel A to Channel B, and vice versa when the DIR input is low.

The device features 3-state outputs, which means that each channel can be independently enabled or disabled using the output enable (OE) inputs. When an output is disabled, it enters a high-impedance state, allowing multiple devices to share a common bus without causing contention issues.

Detailed Application Field Plans

The SN74LVTH646DGVR is commonly used in various applications where level shifting and bus transceiver functions are required. Some specific application fields include:

1. Microcontrollers and Microprocessors: Facilitates communication between different voltage domains in embedded systems.
2. Communication Interfaces: Enables signal translation between different voltage levels in UART, SPI, I2C, and other serial communication interfaces.
3. Memory Systems: Allows interfacing between memory modules operating at different voltage levels, such as DDR, SRAM, and Flash memory.
4. Industrial Automation: Used in PLCs (Programmable Logic Controllers) and other industrial control systems to interface between different voltage domains.
5. Consumer Electronics: Enables level shifting in devices like smartphones, tablets, and gaming consoles, where multiple voltage domains coexist.

Detailed and Complete Alternative Models

1. SN74LVC4245A: Octal Bus Transceiver with 3-State Outputs
2. SN74AVC4T245: Quad-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation
3. SN74LVC8T245: 8-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation
4. SN74LVCH16245A: 16-Bit Bus Transceiver with 3-State Outputs
5. SN74LVC1T45: Single-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation

These alternative models offer similar functionality but may have different specifications, package types, or pin configurations. It is important to select the appropriate model based on specific application requirements.

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