Overview
The SN65ALS176DR is a differential bus transceiver designed by Texas Instruments for bidirectional data communication on multipoint bus transmission lines. This device is part of the SN65ALS176 series and is compliant with RS-422 and RS-485 standards, as well as ITU Recommendations V.11 and X.27. It combines a 3-state, differential line driver and a differential input line receiver, both operating from a single 5-V power supply. The transceiver is suitable for balanced transmission lines and offers features such as low supply-current requirements, wide positive and negative input/output bus-voltage ranges, and thermal shutdown protection.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage | 4.75 | 5 | 5.25 | V |
| Operating Temperature | -40 | 85 | °C | |
| Data Rate | 35 | Mbaud | ||
| Differential Output Delay Time | 3 | 8 | 13 | ns |
| Pulse Skew | 0 | 2 | 15 | ns |
| Output Enable Time to High Level | 23 | 50 | ns | |
| Output Enable Time to Low Level | 14 | 20 | ns | |
| Receiver Hysteresis | 60 | mV | ||
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
Key Features
- Meets or exceeds the requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendations V.11 and X.27.
- Operates at data rates up to 35 Mbaud.
- Low supply-current requirements: 30 mA max.
- Wide positive and negative input/output bus-voltage ranges.
- Thermal shutdown protection and driver positive and negative current limiting.
- Receiver input hysteresis and glitch-free power-up and power-down protection.
- Receiver open-circuit fail-safe design.
- Active-high and active-low enables for direction control.
Applications
The SN65ALS176DR is designed for use in multipoint transmission on long bus lines in noisy environments. It is suitable for various applications including:
- Industrial control systems.
- Telecommunications equipment.
- Point-of-sale terminals.
- Remote sensors and actuators.
- Any system requiring reliable, high-speed data transmission over long distances.
Q & A
- What are the primary standards that the SN65ALS176DR complies with?
The SN65ALS176DR complies with TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendations V.11 and X.27.
- What is the maximum data rate supported by the SN65ALS176DR?
The maximum data rate supported is up to 35 Mbaud.
- What is the operating temperature range of the SN65ALS176DR?
The operating temperature range is from -40°C to 85°C.
- What type of package does the SN65ALS176DR come in?
The device comes in an 8-SOIC (0.154", 3.90mm Width) package.
- Does the SN65ALS176DR have thermal shutdown protection?
- What is the receiver hysteresis of the SN65ALS176DR?
The receiver hysteresis is 60 mV.
- Can the SN65ALS176DR be used in noisy environments?
- How many drivers and receivers does the SN65ALS176DR have?
The device has one driver and one receiver.
- Is the SN65ALS176DR RoHS compliant?
- What is the supply voltage range for the SN65ALS176DR?
The supply voltage range is from 4.75 V to 5.25 V.
