Overview
The SN74LVTH245APWRE4 is a 3.3-V Advanced Bus-Technology (ABT) octal bus transceiver produced by Texas Instruments. This device is designed for low-voltage (3.3-V) VCC operation but can also interface with 5-V systems, making it versatile for mixed-mode signal operations. It is packaged in a 20-pin TSSOP (PW) package and operates over a temperature range of -40°C to 85°C.
The device facilitates asynchronous communication between data buses, transmitting data from the A bus to the B bus or vice versa based on the direction-control (DIR) input. The output-enable (OE) input allows for disabling the device, effectively isolating the buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (PW) | - |
| Pins | 20 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage (VCC) | 2.7 to 3.6 | V |
| High-Level Output Current | 64 mA | - |
| Low-Level Output Current | 32 mA | - |
| Propagation Delay | 3.5 ns | - |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model | - |
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
Applications
- Servers
- LED displays
- Network switches
- Telecom infrastructure
- Motor drivers
- I/O expanders
Q & A
- What is the operating temperature range of the SN74LVTH245APWRE4?
The operating temperature range is -40°C to 85°C.
- What is the package type and pin count of the SN74LVTH245APWRE4?
The device is packaged in a 20-pin TSSOP (PW) package.
- What is the supply voltage range for the SN74LVTH245APWRE4?
The supply voltage range is from 2.7 V to 3.6 V.
- Does the SN74LVTH245APWRE4 support mixed-mode signal operation?
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) at VCC = 3.3 V and TA = 25°C?
The typical VOLP is less than 0.8 V.
- Does the SN74LVTH245APWRE4 have ESD protection?
Yes, it has ESD protection exceeding 2000-V Human-Body Model, 200-V Machine Model, and 1000-V Charged-Device Model.
- What is the purpose of the Ioff feature in the SN74LVTH245APWRE4?
The Ioff feature disables the outputs to prevent damaging current backflow when the device is powered down.
- How does the bus hold feature work in the SN74LVTH245APWRE4?
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 are some common applications of the SN74LVTH245APWRE4?
Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How do you ensure the high-impedance state during power up or power down?
To ensure the high-impedance state, the OE input should be tied to VCC through a pullup resistor.
