DS75176BTM/NOPB

Overview

The DS75176BTM/NOPB is a multipoint RS-485/RS-422 transceiver manufactured by Texas Instruments. It operates on a single +5V supply with a voltage range of 4.75V to 5.25V. The device supports data rates up to 10 Mb/s and features a bus common mode range from -7V to +12V, allowing for ±7V ground differences between devices. It includes thermal shutdown protection and maintains high impedance to the bus when powered off or in tri-state. The component is housed in an 8-pin SOIC package (DS75176BTM) and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports multipoint communication on balanced transmission lines compatible with EIA RS-485 and RS-422 standards.
• Features TRI-STATE outputs over the entire common mode range to prevent bus contention.
• Includes thermal shutdown circuitry that forces driver outputs to a high impedance state during excessive power dissipation.
• Maintains high impedance to the bus when the driver is disabled or VCC is zero, allowing unused devices to be powered down.

Applications

• Multipoint data transmission on long bus lines in noisy environments
• Industrial control systems requiring robust differential signaling
• Building automation and security networks

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature rating. The 'BTM' designation indicates the industrial temperature grade (-40°C to +85°C) and SOIC package. Confirm RoHS compliance status as indicated by the '/NOPB' suffix. Check current production status, as this family may be subject to lifecycle changes.

Selection Notes

Select the DS75176BTM/NOPB for applications requiring extended temperature operation compared to the standard DS75176B. Ensure the design accommodates the 10 Mb/s maximum data rate and the specific propagation delays defined in the datasheet. Verify that the system power supply remains within the 4.75V to 5.25V range for guaranteed electrical characteristics.

Part Context

This component belongs to the DS75176B/DS75176BT family of differential bus transceivers. It is pin-out compatible with the SN75176A/B and DS3695/A series. The device combines a 3-state differential line driver and a differential input receiver designed for minimum loading on the bus, supporting up to 32 transceivers.

Replacement Considerations

Direct pin-compatible alternatives include the SN75176BDR for commercial temperature ranges. For extended temperature requirements, verify availability of other industrial-grade RS-485 transceivers from the manufacturer's portfolio that match the 10 Mb/s speed and 5V supply specifications.

FAQ

What is the bus common mode voltage range?

The device supports a bus common mode range from -7V to +12V, which permits up to a ±7V ground difference between devices on the bus.

How does the device handle fault conditions?

Thermal shutdown protection monitors internal power dissipation. If excessive heat is detected due to shorts or bus contention, the circuit forces the driver outputs into a high impedance state.

Is the device suitable for half-duplex communication?

Yes, the driver and receiver enables can be connected together externally to function as a direction control, facilitating half-duplex multipoint data transmission.