XR16L570 Exar Corporation, XR16L570 Datasheet

XR16L570

Manufacturer Part Number

XR16L570

Description

SMALLEST 1.62V TO 5.5V UART

Manufacturer

Exar Corporation

Datasheet

1.XR16L570.pdf (46 pages)

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DECEMBER 2005

GENERAL DESCRIPTION

The XR16L570 (L570) is a 1.62 to 5.5 volt Universal

Asynchronous Receiver and Transmitter (UART) with 5 volt

tolerant inputs and a reduced pin count. It is software

compatible

ST16C580, ST16C650A, XR16C850 and XR16L580

UARTs. It has 16 bytes of TX and RX FIFOs and is capable

of operating with a serial data rate of up to 4 Mbps at 5V, 3

Mbps at 3.3V,1 Mbps at 2.5V and 750 Kbps at 1.8V. The

internal registers are compatible to the 16C550 register set

plus enhanced registers for additional features to support

today’s high bandwidth data communication needs. The

enhanced features include

software flow control to prevent data loss, selectable RX

and TX trigger levels for more efficient interrupt service,

wireless infrared (IrDA) encoder/decoder for wireless

applications and a unique Power-Save mode to increase

battery operating time. The device comes in 32-QFN and

24-QFN packages in industrial temperature range.

APPLICATIONS

•

Exar

IGURE

Handheld Terminals and Tablets

Handheld Computers

Wireless Portable Point-of-Sale Terminals

Cellular Phones DataPort

GPS Devices

Personal Digital Assistants Modules

Battery Operated Instruments

Corporation 48720 Kato Road, Fremont CA, 94538

PwrSave

1. B

RESET

A2:A0

D7:D0

IOR#

IOW#

CS#

INT

LOCK

industry

IAGRAM

SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE

standard

Data Bus

Interface

automatic hardware and

16C450,

16C550,

•

(510) 668-7000

UART

Regs

BRG

FEATURES

•

Smallest Full Featured UART

1.62V to 5.5V Supply Voltage

5V Tolerant Inputs (except XTAL1/CLK)

’0 ns’ Address Hold Time (T

Software Compatible to industry standard 16C450,

16C550, ST16C580, ST16C650A, XR16C850 and

XR16L580

16-byte Transmit FIFO

16-byte Receive FIFO with Errors Flags

Selectable RX and TX FIFO Trigger Levels

Automatic Hardware (RTS/CTS) Flow Control

Automatic Software (Xon/Xoff) Flow Control

Up to 4 Mbps data rate at 5.0V Operation

Up to 3 Mbps data rate at 3.3V Operation

Up to 1 Mbps data rate at 2.5V Operation

Up to 750 Kbps data rate at 1.8V Operation

Infrared (IrDA) Encoder/Decoder

Complete Modem Interface

Power-Save Mode to conserve battery power

Sleep Mode with Wake-up Interrupt

Very small packages: 24-QFN (4x4x0.9mm) and 32-QFN

(5x5x0.9mm)

Industrial Temperature Grade(-40 to +85

*5 V Tolerant Inputs

Clock Buffer

16 Byte TX FIFO

(Except for CLK)

16 Byte RX FIFO

TX & RX

UART

•

FAX (510) 668-7017

ENDEC

and T

•

(1.62 to 5.5 V)

RTS#

CTS#

DTR#

DSR#

CD#

RI#

www.exar.com

XTAL2

XTAL1 (CLK)

ADH

VCC

GND

)

REV. 1.0.0

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