Overview
The SN74LVTH162245DLR is a 16-bit (dual-octal) noninverting 3-state transceiver designed by Texas Instruments. This device is part of the Texas Instruments Widebus Family and is optimized for low-voltage (3.3-V) operation, with the capability to interface with 5-V system environments. It can be used as two 8-bit transceivers or one 16-bit transceiver, allowing data transmission between the A and B buses based on the direction-control (DIR) input. The output-enable (OE) input allows the device to be disabled, effectively isolating the buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 48-pin SSOP (DL) | |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 2.7 to 3.6 | V |
| Input Voltage Range | -0.5 to 7 | V |
| Output Voltage Range (High State) | -0.5 to VCC + 0.5 | V |
| High-Level Output Current (A Port) | -12 | mA |
| Low-Level Output Current (A Port) | 12 | mA |
| High-Level Input Voltage | 2 | V |
| Low-Level Input Voltage | 0.8 | V |
| Propagation Delay Time (A to B) | 3.5 to 4.3 | ns |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- Members of the Texas Instruments Widebus Family
- A-Port Outputs Have Equivalent 22-Ω Series Resistors, eliminating the need for external resistors
- Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
- Support Unregulated Battery Operation Down to 2.7 V
- Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Ioff and Power-Up 3-State Support Hot Insertion
- Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
- Distributed VCC and GND Pins Minimize High-Speed Switching Noise
- Flow-Through Architecture Optimizes PCB Layout
- Latch-Up Performance Exceeds 500 mA Per JESD 17
- ESD Protection Exceeds JESD 22
Applications
The SN74LVTH162245DLR is suitable for various applications requiring high-speed data transmission and mixed-voltage operation. These include:
- High-Speed Data Transmission Systems
- Mixed-Voltage System Interfaces
- Hot-Insertion Applications
- PCB Designs Requiring Minimal Switching Noise
- Systems Needing Bus Hold and ESD Protection
Q & A
- What is the primary function of the SN74LVTH162245DLR?
The SN74LVTH162245DLR is a 16-bit noninverting 3-state transceiver designed for data transmission between two buses (A and B) based on the direction-control input.
- What is the operating voltage range of the SN74LVTH162245DLR?
The device operates within a supply voltage range of 2.7 to 3.6 volts.
- What type of package does the SN74LVTH162245DLR come in?
The device is packaged in a 48-pin SSOP (DL).
- Does the SN74LVTH162245DLR support hot-insertion applications?
Yes, the device is fully specified for hot-insertion applications using Ioff and power-up 3-state.
- What is the significance of the bus hold feature in the SN74LVTH162245DLR?
The bus hold feature eliminates the need for external pullup or pulldown resistors by holding unused or undriven inputs at a valid logic state.
- How does the SN74LVTH162245DLR minimize high-speed switching noise?
The device minimizes high-speed switching noise through distributed VCC and GND pins.
- What is the ESD protection level of the SN74LVTH162245DLR?
The device exceeds JESD 22 standards with 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model ESD protection.
- Can the SN74LVTH162245DLR operate with unregulated battery power?
Yes, the device supports unregulated battery operation down to 2.7 volts.
- What is the typical output ground bounce (VOLP) of the SN74LVTH162245DLR?
The typical VOLP is less than 0.8 volts at VCC = 3.3 V and TA = 25°C.
- How does the flow-through architecture benefit the PCB layout?
The flow-through architecture optimizes PCB layout by simplifying the placement of components.
