Overview
The SN75LBC184 is a differential data line transceiver produced by Texas Instruments. It is designed in the trade-standard footprint of the SN75176 and features integrated transient voltage suppressors to protect against high-energy noise transients. This device is suitable for half-duplex, RS-485 communications and operates from a single 5-V power supply. The SN75LBC184 is characterized for operation from 0°C to 70°C, making it reliable for various industrial and commercial applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5.25 | V | |
| Voltage at any bus terminal (VI or VIC) | -7 | 12 | V | |
| High-level input voltage (VIH) | 2 | V | ||
| Low-level input voltage (VIL) | 0.8 | V | ||
| Differential input voltage (|VID|) | 12 | V | ||
| High-level output current (IOH) | -60 | mA | ||
| Low-level output current (IOL) | 60 | mA | ||
| Operating free-air temperature (TA) | 0 | 70 | °C |
Key Features
- Integrated transient voltage suppression to protect against high-energy noise transients up to 400W peak power.
- ESD protection for bus terminals exceeds ±30kV IEC 61000-4-2 (contact and air-gap discharge) and ±15kV EIA/JEDEC Human Body Model.
- Controlled driver output-voltage slew rates allow for longer cable stub lengths and support data transmission up to 250kbps.
- Open-circuit fail-safe receiver design ensures a high level output when inputs are left floating.
- One-fourth unit load allows for up to 128 devices connected on the bus.
- Thermal shutdown protection and glitch-free power-up and power-down protection.
- Meets or exceeds the requirements of TIA/EIA-485 (RS-485) and ISO/IEC 8482:1993(E) standards.
- Low disabled supply current of 300μA maximum.
- Pin compatible with SN75176.
Applications
- Industrial networks
- Utility meters
- Motor control
- Industrial process control
- Building automation
Q & A
- What is the operating temperature range for the SN75LBC184?
The SN75LBC184 operates from 0°C to 70°C.
- What is the maximum data transmission rate supported by the SN75LBC184?
The SN75LBC184 supports data transmission up to 250kbps.
- How many devices can be connected on the bus using the SN75LBC184?
Up to 128 devices can be connected on the bus due to its one-fourth unit load feature.
- What kind of ESD protection does the SN75LBC184 offer?
The SN75LBC184 offers ESD protection exceeding ±30kV IEC 61000-4-2 (contact and air-gap discharge) and ±15kV EIA/JEDEC Human Body Model.
- Does the SN75LBC184 have thermal shutdown protection?
- Is the SN75LBC184 compatible with other devices?
The SN75LBC184 is pin compatible with the SN75176.
- What is the typical differential input voltage for the SN75LBC184?
The typical differential input voltage is up to 12V.
- How does the SN75LBC184 handle open-circuit conditions?
The SN75LBC184 has an open-circuit fail-safe receiver design that ensures a high level output when inputs are left floating.
- What is the recommended power supply configuration for the SN75LBC184?
Each supply should be buffered with a 100nF ceramic capacitor located close to the supply pins.
- Does the SN75LBC184 meet industry standards for RS-485 communication?
