Overview
The SN75ALS180DR is a high-speed, advanced low-power Schottky differential driver and receiver pair designed by Texas Instruments. This integrated circuit is optimized for bidirectional data communication on multipoint bus-transmission lines, adhering to the standards of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11. The device operates from a single 5-V power supply and features individual driver and receiver I/O pins with dual VCC and dual GND, making it highly versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.75 | 5 | 5.25 | V |
| Voltage Range at Any Bus Terminal | -10 | 15 | V | |
| Enable Input Voltage | 5.5 | V | ||
| Operating Junction Temperature | 150 | ℃ | ||
| Storage Temperature Range | -65 | 150 | ℃ | |
| Differential Output Voltage (RL = 100 Ω) | 1.5 | 6 | V | |
| Output Enable Time to High Level (RL = 110 Ω) | 23 | 50 | ns | |
| Output Disable Time from High Level (RL = 110 Ω) | 8 | 13 | ns | |
| Receiver Input Impedance | 12 kΩ | |||
| Receiver Input Sensitivity | ±200 mV |
Key Features
- Meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.
- High-speed advanced low-power Schottky circuitry.
- Designed for 25-Mbaud operation in both serial and parallel applications.
- Low skew between devices: 6 ns max.
- Low supply-current requirements: 30 mA max.
- Individual driver and receiver I/O pins with dual VCC and dual GND.
- Wide positive and negative input/output bus voltage ranges.
- Driver output capacity: ±60 mA.
- Thermal shutdown protection and driver positive- and negative-current limiting.
- Glitch-free power-up and power-down protection.
Applications
The SN75ALS180DR is suitable for various applications requiring high-speed, reliable data transmission over multipoint bus lines. These include:
- Industrial control systems.
- Telecommunications equipment.
- Point-of-sale terminals.
- Automotive systems.
- Any system requiring RS-422 or RS-485 communication standards.
Q & A
- What are the main standards that the SN75ALS180DR complies with?
The SN75ALS180DR meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11.
- What is the operating voltage range for the SN75ALS180DR?
The device operates from a single 5-V power supply, with a voltage range of 4.75 V to 5.25 V.
- What is the maximum differential output voltage of the SN75ALS180DR?
The maximum differential output voltage is 6 V when RL = 100 Ω.
- What is the receiver input impedance of the SN75ALS180DR?
The receiver input impedance is a minimum of 12 kΩ.
- Does the SN75ALS180DR have thermal protection?
Yes, the device features thermal shutdown protection and driver positive- and negative-current limiting.
- What is the maximum operating junction temperature for the SN75ALS180DR?
The maximum operating junction temperature is 150 ℃.
- What are the typical applications for the SN75ALS180DR?
Typical applications include industrial control systems, telecommunications equipment, point-of-sale terminals, and automotive systems.
- What is the package type and pin count of the SN75ALS180DR?
The device is available in a 14-pin SOIC package.
- Does the SN75ALS180DR support glitch-free power-up and power-down?
Yes, the device features glitch-free power-up and power-down protection.
- What is the maximum baud rate supported by the SN75ALS180DR?
The device is designed for 25-Mbaud operation.
