Overview
The SN74LVTH245APWR is a 3.3-V Advanced Bus-Technology (ABT) octal bus transceiver with 3-state outputs, manufactured by Texas Instruments. This device is designed for low-voltage operation but can also interface with 5-V systems, making it versatile for mixed-mode signal operations. It is particularly useful 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.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.7 to 3.6 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | TSSOP (PW) | |
| Pins | 20 | |
| High-Level Input Voltage (VIH) | 2 | V |
| Low-Level Input Voltage (VIL) | 0.8 | V |
| Output Current (IOH/IOL) | -24/-32 mA (High), 48 mA (Low) | mA |
| Propagation Delay (tpd) | 8.3 to 13 ns (CL = 15 pF) | ns |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine 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 primary function of the SN74LVTH245APWR? The SN74LVTH245APWR is an octal bus transceiver designed for asynchronous communication between data buses.
- What is the operating voltage range for the SN74LVTH245APWR? The operating voltage range is 2.7 to 3.6 V.
- What type of package does the SN74LVTH245APWR come in? It comes in a TSSOP (PW) package with 20 pins.
- What is the typical output ground bounce for the SN74LVTH245APWR? The typical VOLP (output ground bounce) is less than 0.8 V at VCC = 3.3 V and TA = 25°C.
- Does the SN74LVTH245APWR support hot insertion? Yes, it supports hot insertion with Ioff and power-up 3-state circuitry.
- What is the ESD protection level for the SN74LVTH245APWR? It exceeds 2000-V Human-Body Model and 200-V Machine Model according to JESD 22.
- What are some common applications for the SN74LVTH245APWR? Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders.
- How does the bus hold feature work on the SN74LVTH245APWR? The bus hold feature on the data inputs eliminates the need for external pullup or pulldown resistors by holding unused or floating data inputs at a valid logic level.
- What is the latch-up performance of the SN74LVTH245APWR? The latch-up performance exceeds 500 mA per JESD 17.
- 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.
