xr16v2551im Exar Corporation, xr16v2551im Datasheet

xr16v2551im

Manufacturer Part Number

xr16v2551im

Description

High Performance Duart With 16-byte Fifo And Powersave Feature

Manufacturer

Exar Corporation

Datasheet

1.XR16V2551IM.pdf (51 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

xr16v2551im-F

Manufacturer:

Exar Corporation

Quantity:

10 000

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

MAY 2007

GENERAL DESCRIPTION

The XR16V2551

universal asynchronous receiver and transmitter

(UART) with 16 byte TX and RX FIFOs. The device

operates from 2.25 to 3.6 volts with 5 Volt tolerant

inputs and is pin-to-pin compatible to Exar’s

XR16V2651 and XR16L2551. The device includes 2

additional capabilities over the XR16V2550: Intel and

Motorola data bus selection and a “PowerSave”

mode to further reduce sleep current to a minimum

during sleep mode. 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

capability allows system diagnostics. Independent

programmable fractional baud rate generators are

provided in each channel to select data rates up to 16

Mbps at 3.3 Volt and 4X sampling clock. The V2551

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. XR16V2551 B

IOR# (VCC)

INTA (IRQ#)

CSA# (CS#)

CSB# (A3)

RXRDYA#

RXRDYB#

TXRDYA#

TXRDYB#

PwrSave

CLKSEL

A2:A0

D7:D0

16/68#

(V2551) is a high performance dual

HIGH PERFORMANCE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

LOCK

Data Bus

Motorola

Interface

Intel or

IAGRAM

•

(510) 668-7000

UART

BRG

Regs

(same as Channel A)

*5 Volt Tolerant Inputs

FEATURES

•

UART Channel B

Crystal Osc/Buffer

UART Channel A

2.25 to 3.6 Volt Operation

5 Volt Tolerant Inputs

Intel or Motorola Mode

Pin-to-pin compatible to Exar’s XR16V2651 and the

XR16L2551

Two independent UART channels

PowerSave Feature reduces sleep current to 15 µA

Device Identification and Revision

Crystal oscillator (up to 32MHz) or external clock

(up to 64MHz) input

48-TQFP and 32-QFN packages

TX & RX

■

16 Byte RX FIFO

16 Byte TX FIFO

Data rate of up to 16 Mbps at 3.3 V, and 12.5

Mbps at 2.5 V with 4X sampling rate

Fractional Baud Rate Generator

Transmit and Receive FIFOs of 16 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

TXA, RXA, DTRA#,

DSRA#, RTSA#,

2.25 to 3.6V VCC

DTSA#, CDA#, RIA#,

GND

OP2A#

DSRB#, RTSB#,

XR16V2551

TXB, RXB, DTRB#,

CTSB#, CDB#, RIB#,

XTAL1

XTAL2

OP2B#

•

www.exar.com

REV. 1.0.2

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