xr16m2651 Exar Corporation, xr16m2651 Datasheet

xr16m2651

Manufacturer Part Number

xr16m2651

Description

High Performance Duart With 32-byte Fifo And Powersave Feature

Manufacturer

Exar Corporation

Datasheet

1.XR16M2651.pdf (51 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

xr16m2651IM48-F

Manufacturer:

Exar Corporation

Quantity:

10 000

Current page: 1 of 51
Download datasheet (2Mb)

MAY 2007

GENERAL DESCRIPTION

The XR16M2651

dual universal asynchronous receiver and transmitter

(UART) with 32 byte TX and RX FIFOs. The device

operates from 1.62 to 3.63 volts and is pin-to-pin and

software

XR16L2551. The device includes 2 additional

capabilities over the XR16M2650: Intel and Motorola

data bus selection and a “PowerSave” mode to

minimize the sleep current. It supports Exar’s

enhanced features of selectable FIFO trigger level,

automatic hardware (RTS/CTS) and software flow

control, and a complete modem interface. An internal

loopback

Independent programmable fractional baud rate

generators are provided in each channel to select

data rates up to 16 Mbps at 3.3 Volt with 4X sampling

clock. The M2651 is available in 48-pin TQFP and 32-

pin QFN packages.

APPLICATIONS

•

Exar

OTE

IGURE

Portable Appliances

Telecommunication Network Routers

Ethernet Network Routers

Cellular Data Devices

Factory Automation and Process Controls

Corporation 48720 Kato Road, Fremont CA, 94538

Reset (Reset#)

1 Covered by U.S. Patent #5,649,122

IOW# (R/W#)

INTB (logic 0)

1. XR16M2651 B

IOR# (VCC)

INTA (IRQ#)

CSA# (CS#)

CSB# (A3)

RXRDYA#

RXRDYB#

TXRDYA#

TXRDYB#

PwrSave

CLKSEL

A2:A0

D7:D0

16/68#

compatible

capability

(M2651) is a high performance

HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE

allows

LOCK

Data Bus

Motorola

Interface

Intel or

the

system

IAGRAM

XR16V2551

diagnostics.

and

•

(510) 668-7000

UART

BRG

Regs

(same as Channel A)

FEATURES

•

UART Channel B

Crystal Osc/Buffer

UART Channel A

1.62 to 3.63 Volt Operation

Pin-to-pin and software compatible to Exar’s

XR16L2551, XR16V2551 and XR16M2551

Two independent UART channels

PowerSave Feature reduces sleep current to 15 µA

Device Identification and Revision

Crystal oscillator (up to 24MHz) or external clock

(up to 64MHz) input

48-TQFP and 32-QFN packages

TX & RX

■

32 Byte RX FIFO

32 Byte TX FIFO

Data rate of up to 16 Mbps at 3.3 V

Data rate of up to 12.5 Mbps at 2.5 V

Data rate of up to 8 Mbps at 1.8V

Fractional Baud Rate Generator

Transmit and Receive FIFOs of 32 bytes

Selectable TX and RX FIFO Trigger Levels

Automatic Hardware (RTS/CTS) Flow Control

Automatic Software (Xon/Xoff) Flow Control

Wireless Infrared (IrDA 1.0) Encoder/Decoder

Automatic sleep mode with wake-up interrupt

Full modem interface

•

ENDEC

FAX (510) 668-7017

1.62 to 3.63V VCC

XR16M2651

TXA, RXA, DTRA#,

DSRA#, RTSA#,

CTSA#, CDA#, RIA#,

GND

OP2A#

DSRB#, RTSB#,

TXB, RXB, DTRB#,

CTSB#, CDB#, RIB#,

XTAL1

XTAL2

OP2B#

•

www.exar.com

REV. 1.0.2

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