Overview
The SN74ALS245A-1DWRG4 is an octal bus transceiver with 3-state outputs, designed and manufactured by Texas Instruments. This component is part of the ALS (Advanced Low-Power Schottky) logic family and is optimized for asynchronous two-way communication between data buses. It allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The device also features an output-enable (OE) input that can be used to disable the device, effectively isolating the buses.
Key Specifications
| Parameter | Unit | Min | Nom | Max |
|---|---|---|---|---|
| Supply Voltage (VCC) | V | 4.5 | 5 | 5.5 |
| High-Level Input Voltage (VIH) | V | 2 | ||
| Low-Level Input Voltage (VIL) | V | 0.7 | 0.8 | |
| High-Level Output Current (IOH) | mA | -12 | -15 | |
| Low-Level Output Current (IOL) | mA | 12 | 48† | |
| Operating Free-Air Temperature (TA) | °C | 0 | 70 | |
| Propagation Delay Time (tPLH, tPHL) | ns | 1 | 19 | |
| Output Enable Time (tPZH, tPZL) | ns | 2 | 30 |
Key Features
- Octal bus transceiver with 3-state outputs for asynchronous two-way communication between data buses.
- Direction-control (DIR) input to select data transmission direction (A bus to B bus or B bus to A bus).
- Output-enable (OE) input to disable the device and isolate the buses.
- High drive capability: up to 48 mA low-level output current for the -1 version.
- Low power consumption: part of the ALS (Advanced Low-Power Schottky) logic family.
- Multiple package options: SOIC DW, PDIP, SOP NS, and SSOP DB.
- Operating temperature range: 0°C to 70°C.
Applications
- Data transmission and bus communication in digital systems.
- Microprocessor and microcontroller interfaces.
- Peripheral devices and memory interfaces.
- Industrial control systems and automation.
- Telecommunication and networking equipment.
Q & A
- What is the primary function of the SN74ALS245A-1DWRG4?
The primary function is to facilitate asynchronous two-way communication between data buses.
- How does the direction-control (DIR) input work?
The DIR input determines the direction of data transmission between the A and B buses.
- What is the purpose of the output-enable (OE) input?
The OE input can be used to disable the device, effectively isolating the buses.
- What is the maximum low-level output current for the -1 version?
The maximum low-level output current for the -1 version is 48 mA.
- What are the operating temperature ranges for this device?
The operating temperature range is from 0°C to 70°C.
- What are the available package options for this component?
Available packages include SOIC DW, PDIP, SOP NS, and SSOP DB.
- How does this device manage power consumption?
It is part of the ALS (Advanced Low-Power Schottky) logic family, which is designed for low power consumption.
- What are some common applications for this device?
Common applications include data transmission and bus communication in digital systems, microprocessor and microcontroller interfaces, and industrial control systems.
- What is the significance of the 'G4' suffix in the part number?
The 'G4' suffix indicates a specific version or revision of the component, often related to packaging or manufacturing details.
- Where can I find detailed specifications and datasheets for this component?
Detailed specifications and datasheets can be found on the Texas Instruments website or through distributors like Digi-Key.
