LTC2872RS232/RS485 Dual Multiprotocol Transceiver with Integrated Termination | Drivers, Receivers, Transceivers | 4 | Active | The LTC2872 is a robust pin-configurable transceiver that supports RS232, RS485, and RS422 standards while operating on a single 3V to 5.5V supply. The LTC2872 can be configured as four RS232 single-ended transceivers or two RS485 differential transceivers, or combinations of both, on shared I/O lines.Pin-controlled integrated termination resistors allow for easy interface reconfiguration, eliminating external resistors and control relays. Half-duplex switches allow four-wire and two-wire RS485 configurations. Loopback mode steers the driver inputs to the receiver outputs for diagnostic self-test. The RS485 receivers support up to 256 nodes per bus, and feature full failsafe operation for floating, shorted or terminated inputs.An integrated DC/DC boost converter uses a small inductor and one capacitor, eliminating the need for multiple supplies for driving RS232 levels.ApplicationsFlexible RS232/RS485/RS422 InterfaceSoftware Selectable Multiprotocol Interface PortsPoint-of-Sale TerminalsCable RepeatersProtocol TranslatorsPROFIBUS-DP Networks |
| Drivers, Receivers, Transceivers | 6 | Active | |
LTC2874Quad IO-Link Master Hot Swap Controller and PHY | Integrated Circuits (ICs) | 4 | Active | The LTC2874 provides a rugged, 4-port IO-Link power and communications interface to remote devices connected by cables up to 20m in length.Output supply voltage and inrush current are ramped up in a controlled manner using external N-channel MOSFETs, providing improved robustness compared to fully integrated solutions.Wake-up pulse generation, line noise suppression, connection sensing and automatic restart after fault conditions are supported, along with signaling at 4.8kb/s, 38.4kb/s, and 230.4kb/s.Configuration and fault reporting are exchanged using a SPI-compatible 4-wire interface that operates at clock rates up to 20MHz.The LTC2874 implements an IO-Link master PHY. For IO-Link device designs, see the LT3669.ApplicationsIO-Link MastersIntelligent Sensors and ActuatorsFactory Automation Networks |
| Drivers, Receivers, Transceivers | 12 | Active | |
LTC2876±60V Rugged PROFIBUS RS485 Transceivers | Integrated Circuits (ICs) | 12 | Active | The LTC2876 and LTC2877 are PROFIBUS RS485 transceivers designed to meet the test specifications for PROFIBUS-DP masters and PROFIBUS-DP slaves, fully compatible with IEC 61158-2, type 3: medium attachment unit (MAU). With operation up to 20Mbps, the LTC2876/LTC2877 supports all PROFIBUS data rates up to 12Mbps.The LTC2876 and LTC2877 are exceptionally robust, tolerating ±60V faults on the bus pins and protected to ±52kV ESD. These devices are suitable for harsh environments or where 24V power might be inadvertently connected. Extended ±25V input common mode range and full failsafe operation improve data communication reliability in noisy systems.The LTC2876 and LTC2877 meet PROFIBUS and RS485 specifications with a supply voltage of 4.5V to 5.5V but can operate down to 3V with reduced supply current.Product Selection GuidePART NUMBERLOGIC SUPPLY PINPACKAGELTC2876NODFN-8, MSOP-8LTC2877YESDFN-10, MSOP-10ApplicationsPROFIBUS-DPIndustrial Communication NetworksRS485 and RS422 Systems3V Low Voltage Differential Signaling |
| Interface | 12 | Active | |
| Integrated Circuits (ICs) | 2 | Active | |
| PMIC | 19 | Active | |
LTC2901Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers | PMIC | 17 | Active | The LTC2901 is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are accurate to ±1.5% over temperature. All four voltage comparator outputs are connected to separate pins for individual supply monitoring.The reset and watchdog delay times are adjustable using external capacitors. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. TheRSToutput is guaranteed to be in the correct state for VCCdown to 1V. The LTC2901-1/LTC2901-3 features an open-drainRSToutput, while the LTC2901-2/LTC2901-4 has a push-pullRSToutput.The 43µA supply current makes the LTC2901 ideal for power conscious systems and it may be configured to monitor less than four inputs. The parts are available in the 16-lead narrow SSOP package.ApplicationsDesktop and Notebook ComputersMultivoltage SystemsTelecom EquipmentPortable Battery-Powered EquipmentNetwork Servers |
LTC2902Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance | PMIC | 8 | Active | The LTC2902 is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are digitally programmable to 5%, 7.5%, 10% or 12.5% below the nominal operating voltage, and are accurate to 1.5% over temperature. All four voltage comparator outputs are connected to separate pins for individual supply monitoring.The reset delay time is adjustable using an external capacitor. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. TheRSToutput is guaranteed to be in the correct state for VCCdown to 1V and may be disabled during supply margin testing. The LTC2902-1 features an open-drainRSToutput, while the LTC2902-2 has a push-pullRSToutput.The 43µA supply current makes the LTC2902 ideal for power conscious systems and the part may be configured to monitor less than four inputs. The LTC2902-1/LTC2902-2 are available in the 16-lead narrow SSOP package.ApplicationsDesktop and Notebook ComputersMultivoltage SystemsTelecom EquipmentPortable Battery-Powered EquipmentNetwork Servers |
