Enhanced UARTs hit 16Mbit/s in low-voltage designs

Exar Corporation has added new quad-channel UARTs for low-voltage designs, compatible with industry-standard devices offering an eightfold speed increase with data rates up to 16Mbit/s.

The XR16M554/564/654 series is designed to operate from 1.62V for direct use in advanced low-voltage and low-power boards. All the devices share a common set of features including four independent UART channels and selectable trigger levels for transmit and receive modes. In addition, the XR16M564/564D and XR16M654/654D have automatic sleep mode, automatic hardware and software flow control, a wireless infrared encoder/decoder and a fractional baud-rate generator. The Intel and Motorola bus interfaces are supported.

The series is software- and pin-compatible with the previous 3.3V/5V quad-channel UART products. Each UART channel has a set of registers that provides the user with operating status and control, receiver-error indications, and modem serial-interface controls. An internal loopback capability allows on-board diagnostics. Different FIFO size options of 16-byte, 32-byte or 64-byte are available.

 

FEATURES Supply voltage range: 1.62V to 3.63V Crystal oscillator or external clock input Package options: 48-pin to 80-pin (XR16M564) 48-pin to 100-pin (XR16M654) Compatible with 16C550 register set

APPLICATIONS Point-of-Sale (POS) equipment Telecommunication network routers Ethernet network routers Ticketing machines and parking systems Factory automation and process controls

 

Exar / XR16M554/564/654