XR16L2750IMF Exar Corporation, XR16L2750IMF Datasheet

XR16L2750IMF

Manufacturer Part Number

XR16L2750IMF

Description

QFP48

Manufacturer

Exar Corporation

Datasheet

1.XR16L2750CMTRF.pdf (48 pages)

Specifications of XR16L2750IMF

Date_code

09+

Current page: 1 of 48
Download datasheet (821Kb)

APRIL 2005

GENERAL DESCRIPTION

The XR16L2750

universal asynchronous receiver and transmitter

(UART) with 5 Volt tolerant inputs. The device

operates from 2.25 to 5.5 Volt supply range and is

pin-to-pin compatible to Exar’s ST16C2550 and

XR16C2850 except the 48-TQFP package. The 2750

XR16C2850 enhanced features. It supports the

Exar’s enhanced features of 64 bytes of TX and RX

FIFOs, programmable FIFO trigger level and FIFO

level counters, automatic hardware (RTS/CTS) and

software flow control, automatic RS-485 half duplex

direction control output and a complete modem

interface. Onboard registers provide the user with

operational status and data error flags. An internal

loopback

Independent programmable baud rate generators are

provided in each channel to select data rates up to

6.25 Mbps at 5 Volt and 8X sampling clock. The 2750

is available in 48-pin TQFP and 44-pin PLCC

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

1 Covered by U.S. Patent #5,649,122 and #5,949,787

RXRDYA#

RXRDYB#

TXRDYA#

TXRDYB#

1. XR16L2750 B

D7:D0

A2:A0

Reset

IOW#

CSA#

CSB#

capability

IOR#

INTA

INTB

(2750) is a low voltage dual

allows

LOCK

8-bit Data

Interface

Bus

system

IAGRAM

diagnostics.

•

(510) 668-7000

UART

BRG

Regs

* 5 Volt Tolerant Inputs

FEATURES

•

(same as Channel A)

Crystal Osc/Buffer

UART Channel B

2.25 to 5.5 Volt Operation

5 Volt Tolerant Inputs

Pin-to-pin compatible to Exar’s ST16C2550 and

TI’s TL16C752B on the 48-TQFP package

Pin alike XR16C2850 48-TQFP package but

without CLK8/16, CLKSEL and HDCNTL inputs

Two independent UART channels

Device Identification and Revision

Crystal oscillator or external clock input

Industrial and commercial temperature ranges

48-TQFP and 44-PLCC packages

UART Channel A

2.25V TO 5.5V DUART WITH 64-BYTE FIFO

(Except XTAL1)

■

TX & RX

64 Byte RX FIFO

64 Byte TX FIFO

Reg set compatible to 16C2550 and 16C2850

Up to 6.25 Mbps at 5 Volt, 4 Mbps at 3.3 Volt,

and 3 Mbps at 2.5 Volt with 8X sampling rate

Transmit and Receive FIFOs of 64 bytes

Programmable TX and RX FIFO Trigger Levels

Transmit and Receive FIFO Level Counters

Automatic Hardware (RTS/CTS) Flow Control

Selectable Auto RTS Flow Control Hysteresis

Automatic Software (Xon/Xoff) Flow Control

Automatic

Control Output via RTS#

Wireless Infrared (IrDA 1.0) Encoder/Decoder

Automatic sleep mode

Full modem interface

•

FAX (510) 668-7017

ENDEC

RS-485

2.25 to 5.5 Volt VCC

GND

TXA, RXA, DTRA#,

DSRA#, RTSA#,

DTSA#, CDA#, RIA#,

OP2A#

TXB, RXB, DTRB#,

DSRB#, RTSB#,

CTSB#, CDB#, RIB#,

OP2B#

XTAL1

XTAL2

Half-duplex

•

www.exar.com

2750BLK

Direction

REV. 1.2.1

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