LTC2846CG#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2846CG#TRPBF is a software-selectable multiprotocol transceiver with integrated cable termination, housed in a 36-lead SSOP package. It operates from a single 3.3V supply (VIN: 3V to 3.6V) and includes a 1.2MHz boost switching regulator that generates a 5V VCC output for the internal charge pump and transceiver logic. The device features three drivers and three receivers supporting RS232, RS449, EIA530, EIA530-A, V.35, V.36, and X.21 protocols via mode select pins M0, M1, and M2. Operating temperature range is 0°C to 70°C.

Drivers, Receivers, Transceivers Feature Summary

• Software-selectable protocol support for RS232, RS449, EIA530, EIA530-A, V.35, V.36, and X.21
• Integrated on-chip cable termination eliminating discrete resistor networks
• Internal 1.2MHz boost switching regulator for efficient 3.3V to 5V conversion
• Capacitive charge pump generating required positive and negative supplies

Drivers, Receivers, Transceivers Applications

• Data networking equipment
• Channel Service Unit/Data Service Unit (CSU/DSU)
• Data routers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific CG suffix indicates the commercial temperature grade (0°C to 70°C) rather than the industrial grade. Confirm the TRPBF suffix denotes tape and reel packaging suitable for automated surface mount assembly. Ensure compatibility with standard 36-lead SSOP footprints during PCB layout.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a complete DTE or DCE interface port is required using a companion chip like the LTC2844 or LTC2845. It is suitable for designs needing automatic cable termination switching without external relays. Verify that the 3.3V input voltage range meets the system power supply specifications.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2846 series of multiprotocol transceivers. It is designed to work in conjunction with the LTC2844 or LTC2845 to form a complete serial interface solution. The device integrates power management functions typically handled by separate regulators, reducing the overall bill of materials and board space.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2846IG#PBF

Drivers, Receivers, Transceivers FAQ

How is the interface protocol selected?

The protocol is selected using the M0, M1, and M2 mode select pins. These pins can be connected to ground or VIN, or routed through the interface cable to automatically configure the transceiver upon connection.

What happens when the cable is disconnected?

When all mode pins are left unconnected, the device enters no-cable mode. Driver outputs go high impedance, and supply current drops significantly while receiver inputs remain terminated.

Does the device require external termination resistors?

No, the LTC2846 provides all necessary cable termination on-chip for supported protocols, eliminating the need for discrete termination components.