XR19L400中文资料1-Channel Integrated UART and RS-485 Transceiver数据手册MaxLinear规格书

描述 Description

The XR19L400 (L400) is a highly integrated device that combines a full-featured single channel Universal Asynchronous Receiver and Transmitter (UART) and RS-485 transceivers. The L400 is designed to operate with a 3.3V to 5V power supply. The L400 is fully compliant with RS-485 Standards.
The L400 operates in four different modes: Active, Partial Sleep, Full Sleep and Power-Save. Each mode can be invoked via hardware or software. Upon power-up, the L400 is in the Active mode where the UART and RS-485 transceiver function normally. In the Partial Sleep mode, the internal crystal oscillator of the UART or charge pump of the RS-485 transceiver is turned off. In Full Sleep mode, both the crystal oscillator and the charge pump are turned off. While the UART is in the Sleep mode, the Power-Save mode isolates the core logic from the control signals (chip select, read/write strobes, address and data bus lines) to minimize the power consumption. The RS-485 receivers remain active in any of these four modes.

特性 Features

·Meets true RS-485 Standards from +3.0V to +5.5V operation·Up to 8 Mbps data transmission rate·45us sleep mode exit (charge pump to full power)·ESD protection for RS-485 I/O pins at·+/-15kV - Human Body Model·+/-15kV - IEC 61000-4-2, Air-Gap Discharge·+/- 8kV - IEC 61000-4-2, Contact Discharge
·Software compatible with industry standard 16550 UART·Intel/Motorola bus select·Complete modem interface·Sleep and Power-save modes to conserve battery power·Wake-up interrupt upon exiting low power modes·Pb-Free, RoHS Compliant Versions Offered

应用 Application

·Battery-Powered Equipment·Handheld and Mobile Devices·Handheld Terminals·Industrial Peripheral Interfaces·Point-of-Sale (POS) Systems