Overview
The SN74ABT245BPW is an octal bus transceiver produced by Texas Instruments, designed for asynchronous communication between data buses. This device enables the transmission of data from the A bus to the B bus or from the B bus to the A bus, based on the logic level at the direction-control (DIR) input. The output-enable (OE) input allows the device to be disabled, effectively isolating the buses. It is particularly suited for hot-insertion applications, featuring Ioff and power-up 3-state support to prevent damaging current backflow and driver conflict during power cycles.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (PW) |
| Pins | 20 |
| Operating Temperature Range (°C) | -40 to 85 |
| Package Quantity | Carrier 2,000 | LARGE T&R |
| VCC Range | 4.5 V to 5.5 V |
| High-Drive Outputs | 32-mA IOH, 64-mA IOL |
| ESD Protection | 2000-V Human-Body Model (A114-A), 200-V Machine Model (A115-A) |
Key Features
- Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C
- Ioff and Power-Up 3-State Support for Hot Insertion
- High-Drive Outputs (32-mA IOH, 64-mA IOL)
- Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD 17
- ESD Protection Exceeds JESD 22
Applications
The SN74ABT245BPW is ideal for various applications requiring asynchronous communication between data buses, such as in computer systems, data processing equipment, and other digital systems where bus isolation and hot insertion capabilities are necessary. It is also suitable for use in environments where high-drive outputs and robust ESD protection are required.
Q & A
- What is the primary function of the SN74ABT245BPW?
The primary function is to enable asynchronous communication between data buses, transmitting data from the A bus to the B bus or vice versa based on the direction-control input.
- What package type and pin count does the SN74ABT245BPW have?
The device comes in a TSSOP (PW) package with 20 pins.
- What is the operating temperature range of the SN74ABT245BPW?
The operating temperature range is -40°C to 85°C.
- What are the high-drive output capabilities of the SN74ABT245BPW?
The device has high-drive outputs with 32-mA IOH and 64-mA IOL.
- Does the SN74ABT245BPW support hot insertion?
Yes, it supports hot insertion with Ioff and power-up 3-state circuitry.
- What level of ESD protection does the SN74ABT245BPW offer?
The device offers ESD protection exceeding 2000-V Human-Body Model (A114-A) and 200-V Machine Model (A115-A).
- How should the output-enable (OE) input be configured during power up or power down?
The OE input should be tied to VCC through a pullup resistor to ensure the high-impedance state.
- What are some typical applications for the SN74ABT245BPW?
It is used in computer systems, data processing equipment, and other digital systems requiring bus isolation and hot insertion capabilities.
- Does the SN74ABT245BPW meet any specific industry standards for latch-up performance?
Yes, it exceeds 500 mA per JEDEC Standard JESD 17.
- How many devices are typically included in a carrier package?
A carrier package typically includes 2,000 devices.
