Overview
The SN74LVTH245APWE4, produced by Texas Instruments, is an octal bus transceiver designed for low-voltage (3.3-V) operation with the capability to interface with 5-V system environments. These devices are optimized for asynchronous communication between data buses, allowing data transmission from the A bus to the B bus or vice versa based on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device, effectively isolating the buses. This component is particularly useful in applications requiring mixed-mode signal operation and hot-insertion capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 20-TSSOP (0.173", 4.40mm Width) | |
| Pins | 20 | |
| Operating Temperature Range | -40°C to 85°C | °C |
| Voltage - Supply | 2.7 V ~ 3.6 V | V |
| Current - Output High, Low | 32mA, 64mA | mA |
| Logic Type | Transceiver, Non-Inverting | |
| Number of Elements | 1 | |
| Number of Bits per Element | 8 | |
| Output Type | Push-Pull | |
| Mounting Type | Surface Mount |
Key Features
- Supports mixed-mode signal operation (5-V input and output voltages with 3.3-V VCC)
- Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C
- Supports unregulated battery operation down to 2.7 V
- Ioff and power-up 3-state support for hot insertion
- Bus hold on data inputs eliminates the need for external pullup/pulldown resistors
- Latch-up performance exceeds 500 mA per JESD 17
- ESD protection exceeds JESD 22 (2000-V Human-Body Model, 200-V Machine Model)
- Slow edge rates minimize output ringing
Applications
The SN74LVTH245APWE4 is suitable for various applications requiring asynchronous communication between data buses, including:
- Cable modem termination systems
- Servers
- LED displays
- Systems needing mixed-voltage translation (e.g., from 5 V to 3.3 V)
- Hot-insertion applications where devices need to be powered up or down without causing damage
Q & A
- What is the primary function of the SN74LVTH245APWE4?
The primary function is to act as an octal bus transceiver for asynchronous communication between data buses, allowing data transmission from the A bus to the B bus or vice versa based on the direction-control input.
- What is the operating voltage range of the SN74LVTH245APWE4?
The operating voltage range is from 2.7 V to 3.6 V.
- What type of package does the SN74LVTH245APWE4 come in?
The component comes in a 20-TSSOP (0.173", 4.40mm Width) package.
- What is the significance of the Ioff feature in the SN74LVTH245APWE4?
The Ioff feature disables the outputs, preventing damaging current backflow through the devices when they are powered down.
- How does the bus hold feature work in the SN74LVTH245APWE4?
The bus hold feature on data inputs eliminates the need for external pullup/pulldown resistors by holding unused or floating data inputs at a valid logic level.
- What is the ESD protection level of the SN74LVTH245APWE4?
The device has ESD protection exceeding JESD 22, with a 2000-V Human-Body Model and 200-V Machine Model.
- Can the SN74LVTH245APWE4 operate in mixed-voltage environments?
Yes, it supports mixed-mode signal operation with 5-V input and output voltages and 3.3-V VCC.
- What is the typical output ground bounce (VOLP) of the SN74LVTH245APWE4?
The typical VOLP is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- What is the operating temperature range of the SN74LVTH245APWE4?
The operating temperature range is from -40°C to 85°C.
- Is the SN74LVTH245APWE4 RoHS compliant?
Yes, the device is RoHS compliant.
