Overview
The SN65LBC184, produced by Texas Instruments, is a differential data line transceiver designed to meet the requirements of TIA/EIA-485 (RS-485) and ISO/IEC 8482:1993(E) standards. This device is part of the trade-standard footprint of the SN75176 and is enhanced with built-in protection against high-energy noise transients, making it highly reliable in noisy environments. The SN65LBC184 provides a low-cost, direct-coupled data line interface without the need for external components or isolation transformers.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage | 4.75V to 5.25V |
| Driver Data Input | DE (Active-HIGH enable) |
| Receiver Enable | RE (Active-LOW enable) |
| Bus Input/Output | A and B (complementary outputs) |
| Receiver Data Output | R |
| ESD Protection | ±30kV IEC 61000-4-2 (contact and air-gap discharge), ±15kV EIA/JEDEC Human body model |
| Transient Voltage Suppression | 400W peak (typical) per IEC 61000-4-5 |
| Data Rate | Up to 250kbps in electrically noisy environments |
| Package Types | SOIC (8-pin), PDIP (8-pin) |
| Thermal Shutdown Protection | Yes |
| Power-up and Power-down Glitch Protection | Yes |
| Disabled Supply Current | 300μA maximum |
Key Features
- Integrated transient voltage suppression and ESD protection exceeding ±30kV IEC 61000-4-2 and ±15kV EIA/JEDEC Human body model.
- Circuit damage protection of 400W 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 and power-down glitch protection.
- Low disabled supply current of 300μA maximum.
- Pin compatible with SN75176.
Applications
- Industrial networks.
- Utility meters.
- Motor control systems.
Q & A
- What are the key standards that the SN65LBC184 complies with?
The SN65LBC184 meets or exceeds the requirements of TIA/EIA-485 (RS-485) and ISO/IEC 8482:1993(E) standards.
- What is the maximum data rate supported by the SN65LBC184?
The SN65LBC184 supports data rates up to 250kbps in electrically noisy environments.
- What type of ESD protection does the SN65LBC184 offer?
The SN65LBC184 offers ESD protection exceeding ±30kV IEC 61000-4-2 (contact and air-gap discharge) and ±15kV EIA/JEDEC Human body model.
- What is the transient voltage suppression capability of the SN65LBC184?
The SN65LBC184 can withstand overvoltage transients of 400W peak (typical) per IEC 61000-4-5.
- What are the package types available for the SN65LBC184?
The SN65LBC184 is available in SOIC (8-pin) and PDIP (8-pin) packages.
- Does the SN65LBC184 have thermal shutdown protection?
Yes, the SN65LBC184 includes thermal shutdown protection.
- How many devices can be connected on the bus using the SN65LBC184?
The SN65LBC184 allows up to 128 devices on the bus due to its 1/4 unit load capability.
- Is the SN65LBC184 pin compatible with other devices?
Yes, the SN65LBC184 is pin compatible with the SN75176.
- What is the maximum disabled supply current of the SN65LBC184?
The maximum disabled supply current of the SN65LBC184 is 300μA.
- In what types of applications is the SN65LBC184 commonly used?
The SN65LBC184 is commonly used in industrial networks, utility meters, and motor control systems.
