Catalog
Dual-protocol RS-232(1T/1R)/RS-485(1T/1R) transceiver
Key Features
• Meets or exceeds the requirements of the TIA/EIA-485A and TIA/EIA-232F standards1 transmitter, 1 receiver for RS-2321 transmitter, 1 receiver for RS-485On-chip switchable 120Ω termination resistor for RS-485 modeIntegrated charge-pump for RS-232 signaling3V to 5.5V supply voltage1.65V to 5.5V supply for logic data and control signalsRS-485 differential output exceeds 2.1V for PROFIBUS compatibility with 5V supplyLarge output swing (typical ± 9V) for RS-232 modeSLR Pin Selectable Data Rates:RS-232 3T5R mode: 250kbps and 1MbpsRS-485 half-duplex and full-duplex mode: 500kbps and 20MbpsBus I/O protection±16kV HBM ESD±8kV IEC 61000-4-2 contact and ±15kV air-gap discharge±4kV IEC 61000-4-4 fast transient burstShutdown pin for extremely low current consumption (10µA typical) in disabled stateGlitch-free power-up/down for hot plug-in capability1/8 unit load (up to 256 bus nodes) for RS-485Open, short, and idle bus failsafe for RS-485 receiverBus short-circuit protection, Thermal shutdownExtended ambient temperature range: -40°C to 125°CSpace-saving thermally efficient 4mm x 4mm VQFN-24 packageMeets or exceeds the requirements of the TIA/EIA-485A and TIA/EIA-232F standards1 transmitter, 1 receiver for RS-2321 transmitter, 1 receiver for RS-485On-chip switchable 120Ω termination resistor for RS-485 modeIntegrated charge-pump for RS-232 signaling3V to 5.5V supply voltage1.65V to 5.5V supply for logic data and control signalsRS-485 differential output exceeds 2.1V for PROFIBUS compatibility with 5V supplyLarge output swing (typical ± 9V) for RS-232 modeSLR Pin Selectable Data Rates:RS-232 3T5R mode: 250kbps and 1MbpsRS-485 half-duplex and full-duplex mode: 500kbps and 20MbpsBus I/O protection±16kV HBM ESD±8kV IEC 61000-4-2 contact and ±15kV air-gap discharge±4kV IEC 61000-4-4 fast transient burstShutdown pin for extremely low current consumption (10µA typical) in disabled stateGlitch-free power-up/down for hot plug-in capability1/8 unit load (up to 256 bus nodes) for RS-485Open, short, and idle bus failsafe for RS-485 receiverBus short-circuit protection, Thermal shutdownExtended ambient temperature range: -40°C to 125°CSpace-saving thermally efficient 4mm x 4mm VQFN-24 package
Description
AI
THVD4411 is a highly integrated and robust multiprotocol transceiver supporting RS-232, RS-422 and RS-485 physical layers. The device has one transmitter and one receiver to enable 1T1R RS-232 port. Device also integrates one transmitter and one receiver to enable half and full duplex RS-485 port. MODE selection pins enable shared bus and logic pins for the protocols to share a common single connector. Integrated termination for RS-485 bus pins and for RS-232 receiver inputs are provided so no external components are needed to realize a fully-functional communication port. These devices have slew rate select feature that enables them to be used at two maximum speeds based on the SLR pin setting.
These devices feature integrated Level 4 IEC ESD protection, eliminating the need for external system-level protection components. In addition, the RS-485 receiver fail-safe feature drives logic high on received logic output when the bus inputs are open or shorted together or when the bus is idle. Shutdown mode consumes ultra-low current (10µA typical) in power-sensitive applications. The device needs 3V to 5.5V supply that powers the charge pump for RS-232 and the drivers and receivers for both RS-232 and RS-485. A separate logic supply VIO (1.65V to 5.5V) enables interface with low level microcontrollers.
THVD4411 is a highly integrated and robust multiprotocol transceiver supporting RS-232, RS-422 and RS-485 physical layers. The device has one transmitter and one receiver to enable 1T1R RS-232 port. Device also integrates one transmitter and one receiver to enable half and full duplex RS-485 port. MODE selection pins enable shared bus and logic pins for the protocols to share a common single connector. Integrated termination for RS-485 bus pins and for RS-232 receiver inputs are provided so no external components are needed to realize a fully-functional communication port. These devices have slew rate select feature that enables them to be used at two maximum speeds based on the SLR pin setting.
These devices feature integrated Level 4 IEC ESD protection, eliminating the need for external system-level protection components. In addition, the RS-485 receiver fail-safe feature drives logic high on received logic output when the bus inputs are open or shorted together or when the bus is idle. Shutdown mode consumes ultra-low current (10µA typical) in power-sensitive applications. The device needs 3V to 5.5V supply that powers the charge pump for RS-232 and the drivers and receivers for both RS-232 and RS-485. A separate logic supply VIO (1.65V to 5.5V) enables interface with low level microcontrollers.
