DS96176CN/NOPB

Overview

The DS96176CN/NOPB is a monolithic RS-485/RS-422 differential bus transceiver designed for bidirectional data communication on balanced multipoint transmission lines. It integrates a TRI-STATE differential line driver and a differential input receiver operating from a single 5.0V supply. The device meets EIA Standard RS-422A and RS-485, featuring wide positive and negative common-mode voltage ranges suitable for noisy environments. Key electrical parameters include a maximum output current of ±60 mA, an input sensitivity of ±200 mV, and typical hysteresis of 50 mV. It operates within a temperature range of 0°C to +70°C and utilizes an 8-lead DIP package.

Feature Summary

• Compliance with EIA Standards RS-422A and RS-485 for reliable multipoint transmission
• Integrated thermal shutdown protection and positive/negative current limiting for fault tolerance
• TRI-STATE driver and receiver enables allowing individual direction control
• Wide common-mode voltage range supporting operation in electrically noisy environments

Applications

• Bidirectional data communication on balanced multipoint bus transmission lines
• Industrial automation systems requiring robust differential signaling
• Building automation and security networks utilizing RS-485/RS-422 protocols

Procurement Notes

Verify the component origin carefully as Texas Instruments acquired National Semiconductor. Confirm that the NOPB suffix indicates lead-free and RoHS compliance. Ensure the specific package variant matches the required 8-lead DIP form factor for the target PCB layout. Cross-reference the datasheet revision to confirm parameter consistency.

Selection Notes

Select this component when a standard RS-485 or RS-422 transceiver is required in a through-hole DIP package. It is appropriate for applications needing ±60 mA drive capability and thermal protection. Consider alternative packages like SOIC if surface-mount space is limited. Verify that the 5V logic levels align with the system's power supply and I/O requirements.

Part Context

Originally manufactured by National Semiconductor, this part was integrated into Texas Instruments' portfolio following their acquisition. The DS96176 serves as a foundational interface IC for serial communication buses. It belongs to a family of differential transceivers designed for industrial and commercial data transmission standards.

Replacement Considerations

Direct pin-compatible replacements may include other SN75176 variants or equivalent RS-485 transceivers from different manufacturers. Verify that substitute parts meet the same ±60 mA output current and thermal shutdown specifications. Check package compatibility and ensure the replacement supports the required 0°C to +70°C operating temperature range.

FAQ

What is the typical input hysteresis of the receiver?

The receiver features a typical input hysteresis of 50 mV, which helps prevent noise-induced switching.

How does the device protect against line faults?

The driver includes positive and negative current-limiting features and thermal shutdown protection, which activates at approximately 160°C junction temperature.

Can the driver and receiver enables be used independently?

Yes, the DS96176 provides individual active-high driver enable and active-low receiver enable pins, allowing flexible direction control.