Overview
The SN65ALS180DRG4 is a differential driver and receiver pair integrated circuit designed by Texas Instruments. This device is optimized for bidirectional data communication on multipoint bus-transmission lines and meets the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11. It combines a 3-state differential line driver and a differential input line receiver, both operating from a single 5-V power supply. The device features active-high and active-low enables for direction control and is suitable for party-line applications due to its wide positive and negative common-mode voltage ranges.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC Supply Voltage | 4.75 | 5 | 5.25 | V |
| Voltage Range at Any Bus Terminal | -10 | 15 | V | |
| Operating Free-Air Temperature | -40 | 85 | °C (SN65ALS180) | |
| Operating Free-Air Temperature | 0 | 70 | °C (SN75ALS180) | |
| Differential Output Voltage (RL = 100 Ω) | 1.5 | 6 | V | |
| Differential Output Voltage (RL = 54 Ω) | 1.5 | 2.5 | V | |
| Receiver Input Impedance | 12 kΩ | |||
| Receiver Input Sensitivity | ±200 mV | |||
| Driver Output Current | ±60 mA |
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.
- Thermal shutdown protection and driver positive- and negative-current limiting.
- Glitch-free power-up and power-down protection.
- Operates from a single 5-V supply.
Applications
The SN65ALS180DRG4 is suitable for various applications requiring reliable and high-speed data transmission over multipoint bus lines. These include:
- Industrial control systems.
- Telecommunications equipment.
- Point-of-sale terminals.
- Remote sensors and actuators.
- Any system requiring TIA/EIA-422-B or TIA/EIA-485-A compliant communication.
Q & A
- What are the primary standards that the SN65ALS180DRG4 complies with?
The SN65ALS180DRG4 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 SN65ALS180DRG4?
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 operating temperature for the SN65ALS180DRG4?
The maximum operating free-air temperature is 85°C for the SN65ALS180 and 70°C for the SN75ALS180.
- What is the differential output voltage range for the driver?
The differential output voltage range is 1.5 V to 6 V for a 100 Ω load and 1.5 V to 2.5 V for a 54 Ω load.
- Does the SN65ALS180DRG4 have thermal protection?
Yes, the device features thermal shutdown protection and driver positive- and negative-current limiting.
- What is the receiver input impedance?
The receiver input impedance is a minimum of 12 kΩ.
- What is the driver output current capacity?
The driver output current capacity is ±60 mA.
- Is the SN65ALS180DRG4 suitable for party-line applications?
Yes, it is suitable due to its wide positive and negative input/output bus voltage ranges.
- Does the SN65ALS180DRG4 have glitch-free power-up and power-down protection?
Yes, it does.
- What are some common applications for the SN65ALS180DRG4?
Common applications include industrial control systems, telecommunications equipment, point-of-sale terminals, and remote sensors and actuators.
