Overview
The SN75LBC184DRG4 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. This transceiver is suitable for applications requiring reliable data transmission in electrically noisy environments. The SN75LBC184DRG4 operates as a half-duplex RS-485 transceiver, supporting data transmission rates up to 250 kbps.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage | 4.75V to 5.25V |
| Data Rate | Up to 250 kbps |
| Operating Temperature | 0°C to 70°C (SN75LBC184), -40°C to 85°C (SN65LBC184) |
| ESD Protection | ±30kV IEC 61000-4-2, contact and air-gap discharge |
| Surge Protection | Up to 400W peak (typical) per IEC 61000-4-5 |
| Driver Enable | Active-HIGH |
| Receiver Enable | Active-LOW |
| Package | 8-SOIC (0.154", 3.90MM WIDTH), 8-PDIP (9.81mm × 6.35mm) |
| Disabled Supply Current | 300 µA maximum |
Key Features
- Integrated transient voltage suppression and ESD protection for bus terminals.
- Slew-rate controlled driver outputs to allow longer cable stub lengths and unterminated cable runs.
- Open-circuit fail-safe receiver design providing a high level output when inputs are left floating.
- High input resistance equivalent to one-fourth unit load, allowing up to 128 devices on the bus.
- Thermal shutdown protection and power-up/power-down glitch protection.
- Pin compatible with SN75176.
- Low disabled supply current of 300 µA maximum.
Applications
- Industrial networks.
- Utility meters.
- Motor control systems.
- Party-line data buses in electrically noisy environments, such as industrial process control.
Q & A
- What is the primary function of the SN75LBC184DRG4?
The SN75LBC184DRG4 is a differential data line transceiver designed for half-duplex RS-485 communication.
- What are the key protection features of the SN75LBC184DRG4?
The device features integrated transient voltage suppression and ESD protection exceeding ±30kV IEC 61000-4-2, and surge protection up to 400W peak per IEC 61000-4-5.
- What is the maximum data rate supported by the SN75LBC184DRG4?
The device supports data transmission rates up to 250 kbps.
- What are the operating temperature ranges for the SN75LBC184 and SN65LBC184?
The SN75LBC184 operates from 0°C to 70°C, while the SN65LBC184 operates from -40°C to 85°C.
- How many devices can be connected on the bus using the SN75LBC184DRG4?
Up to 128 devices can be connected on the bus due to the high input resistance equivalent to one-fourth unit load.
- What type of driver and receiver enables does the SN75LBC184DRG4 use?
The device uses an active-HIGH driver enable and an active-LOW receiver enable.
- Is the SN75LBC184DRG4 pin compatible with other devices?
Yes, it is pin compatible with the SN75176.
- What is the maximum disabled supply current of the SN75LBC184DRG4?
The maximum disabled supply current is 300 µA.
- In what types of environments is the SN75LBC184DRG4 particularly useful?
The device is particularly useful in electrically noisy environments such as industrial networks, utility meters, and motor control systems.
- What are the package options available for the SN75LBC184DRG4?
The device is available in 8-SOIC and 8-PDIP packages.
