SN65ALS1176DRE4

SN65ALS1176DRE4 Application Field and Working Principle

The SN65ALS1176DRE4 is a 4-channel, Hot Swap-capable RS-485/RS-422 transceiver manufactured by Texas Instruments. The part offers a combination of enhanced low-power and ESD protection features. It primarily serves as an interface between computer systems, medical and industrial equipment and communication peripherals, and provides data transmission at speeds up to 10 Mb/s. When used in harsh, electrostatic discharge (ESD)-prone environments, the ESD protection on the SN65ALS1176DR4 can prevent ESD damage to connected equipment for improved system reliability.

Features

• ESD protection with ±15kV permanent human-body (HBM) protection
• Error detecting, false-start speed support
• Hot Swap-capable, low-power operation
• Speed operation up to 10 Mbps
• Low-noise operation

Applications

• Industrial Automation
• Medical Equipment
• Factory Automation
• Data Communication Networks
• Automated Test Equipment

Working Principle

The SN65ALS1176DR4 supports five different driver operation modes, which can be used to sustain a wide range of data transmission speeds: 10 Mbps, 6 Mbps, 4 Mbps, 2 Mbps and 1 Mbps. To ensure low-noise operation, the part features slew rate-limiting, which helps reduce EMI emissions. A disable feature is also included, which turns off all driver outputs.In terms of receiver sensitivity, the SN65ALS1176DR4 offers a higher level of performance than most other devices. The part has a three-state-mode receiver output, which improves data transmission over long distances.The transceiver\'s Hot Swap-capable operation protects it from in-rush currents and spikes. The part also offers an active-low ESD-protected control output, which can be used to monitor the state of an RS-485/RS-422 communication line. The SN65ALS1176DR4 also offers enhanced ESD protection, with a ±15kV HBM protection to protect connected equipment from ESD damage.