Overview
The SN65ALS176DRG4 is a differential bus transceiver produced by Texas Instruments. This device is designed for bidirectional data communication on multipoint bus transmission lines, adhering to standards such as TIA/EIA-422-B, TIA/EIA-485-A, and 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 device is characterized for operation from –40°C to 85°C, making it suitable for a wide range of industrial and commercial applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.75 | 5 | 5.25 | V |
| Input Voltage at Any Bus Terminal | -7 | 12 | V | |
| Differential Input Voltage | -12 | 12 | V | |
| Operating Free-Air Temperature | -40 | 85 | °C | |
| Differential Output Delay Time | 15 | 13 | ns | |
| Pulse Skew | 0 | 2 | ns | |
| Output Enable Time to High Level | 23 | 50 | ns | |
| Output Disable Time from High Level | 14 | 20 | ns |
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.
- Four skew limits available: 15 ns (SN65ALS176), 10 ns (SN75ALS176), 7.5 ns (SN75ALS176A), and 5 ns (SN75ALS176B).
- Designed for multipoint transmission on long bus lines in noisy environments.
- Low supply-current requirements: 30 mA max.
- Wide positive and negative input/output bus-voltage ranges.
- Thermal shutdown protection.
- Driver positive and negative current limiting.
- Receiver input hysteresis.
- Glitch-free power-up and power-down protection.
- Receiver open-circuit fail-safe design.
Applications
The SN65ALS176DRG4 is suitable for various applications requiring reliable and high-speed data transmission over long distances, such as:
- Industrial control systems.
- Telecommunications equipment.
- Automotive systems.
- Point-of-sale terminals.
- Remote sensors and actuators.
Q & A
- What are the operating temperature ranges for the SN65ALS176DRG4?
The device operates from –40°C to 85°C.
- What are the key standards that the SN65ALS176DRG4 complies with?
The device meets or exceeds the requirements of 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 SN65ALS176DRG4?
The device operates at data rates up to 35 Mbaud.
- What is the significance of the different skew limits available for this device?
The skew limits (15 ns, 10 ns, 7.5 ns, and 5 ns) indicate the maximum difference in propagation delay times between channels, ensuring reliable data transmission.
- What kind of protection features does the SN65ALS176DRG4 have?
The device includes thermal shutdown protection, driver positive and negative current limiting, and receiver input hysteresis.
- What is the power supply voltage range for the SN65ALS176DRG4?
The device operates with a supply voltage range of 4.75 V to 5.25 V.
- What is the significance of the receiver open-circuit fail-safe design?
This design ensures that the receiver output remains in a valid state even if the bus lines are open-circuited.
- Can the SN65ALS176DRG4 be used in noisy environments?
Yes, the device is designed for multipoint transmission on long bus lines in noisy environments.
- What are some common applications for the SN65ALS176DRG4?
Common applications include industrial control systems, telecommunications equipment, automotive systems, and point-of-sale terminals.
- Is the SN65ALS176DRG4 still in production?
No, the SN65ALS176DRG4 is listed as obsolete and no longer manufactured.
