Overview
The SN75LBC184DR is a differential data line transceiver produced by Texas Instruments. It is designed in the trade-standard footprint of the SN75176 and features built-in protection against high-energy noise transients, enhancing reliability and immunity to noise. This transceiver is suitable for direct-coupled data line interfaces without the need for external components or isolation transformers.
Key Specifications
| Parameter | Description |
|---|---|
| Package | 8-SOIC (Surface Mount) |
| Package Size | 4.9mm × 6mm |
| Data Rate | 250 kbps |
| Duplex | Half |
| Protocol | RS422, RS485 |
| Receiver Hysteresis | 70 mV |
| Supply Voltage | 4.75 V to 5.25 V |
| Operating Temperature | 0°C to 70°C |
| ESD Protection | ±30 kV IEC 61000-4-2 (contact and air-gap discharge) |
| Transient Voltage Suppression | 400 W peak (typical) per IEC 61000-4-5 |
| Disabled Supply Current | 300 μA maximum |
Key Features
- Integrated transient voltage suppression and ESD protection exceeding ±30 kV IEC 61000-4-2 for bus terminals.
- Circuit damage protection of 400 W peak (typical) per IEC 61000-4-5.
- Controlled driver output-voltage slew rates allowing longer cable stub lengths.
- Open-circuit fail-safe receiver design.
- 1/4 unit load, enabling up to 128 devices on the bus.
- Thermal shutdown protection and power-up/power-down glitch protection.
- Compliance with TIA/EIA-485 (RS-485) and ISO/IEC 8482:1993(E) standards.
- Low disabled supply current of 300 μA maximum.
- Pin compatible with SN75176.
Applications
- Industrial networks.
- Utility meters.
- Motor control systems.
Q & A
- What is the primary function of the SN75LBC184DR?
The SN75LBC184DR is a differential data line transceiver designed for RS422 and RS485 communication protocols.
- What are the key protection features of the SN75LBC184DR?
The device features integrated transient voltage suppression and ESD protection exceeding ±30 kV IEC 61000-4-2, as well as circuit damage protection of 400 W peak (typical) per IEC 61000-4-5.
- What is the data rate supported by the SN75LBC184DR?
The SN75LBC184DR supports a data rate of up to 250 kbps.
- What is the operating temperature range of the SN75LBC184DR?
The operating temperature range is from 0°C to 70°C.
- Is the SN75LBC184DR compatible with other devices?
Yes, it is pin compatible with the SN75176.
- What are the typical applications of the SN75LBC184DR?
Typical applications include industrial networks, utility meters, and motor control systems.
- What is the supply voltage range for the SN75LBC184DR?
The supply voltage range is from 4.75 V to 5.25 V.
- Does the SN75LBC184DR have thermal shutdown protection?
Yes, it includes thermal shutdown protection.
- How many devices can be connected on the bus using the SN75LBC184DR?
Up to 128 devices can be connected on the bus due to its 1/4 unit load capability.
- Is the SN75LBC184DR RoHS compliant?
Yes, the SN75LBC184DR is lead-free and RoHS compliant.
