xr16v2750 Exar Corporation, xr16v2750 Datasheet

xr16v2750

Manufacturer Part Number

xr16v2750

Description

High Performance Duart With 64-byte Fifo

Manufacturer

Exar Corporation

Datasheet

1.XR16V2750.pdf (52 pages)

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Download datasheet (984Kb)

SEPTEMBER 2007

GENERAL DESCRIPTION

The XR16V2750

universal asynchronous receiver and transmitter

(UART) with 64 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

ST16C2550 and XR16L2750. The V2750 register set

is identical to the XR16L2750 and is compatible to the

ST16C2550 and the XR16C2850 enhanced features.

It supports the Exar’s enhanced features of

programmable FIFO trigger level and FIFO level

counters,

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 8

Mbps at 3.3 Volt and 8X sampling clock. The V2750

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

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

RXRDYA#

RXRDYB#

TXRDYA#

TXRDYB#

1. XR16V2750 B

D7:D0

A2:A0

Reset

IOW#

CSA#

CSB#

IOR#

INTA

INTB

capability

automatic

(V2750) is a high performance dual

allows

hardware

LOCK

8-bit Data

Interface

Bus

system

IAGRAM

(RTS/CTS)

diagnostics.

HIGH PERFORMANCE DUART WITH 64-BYTE FIFO

and

•

(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

Pin-to-pin compatible to Exar’s XR16L2750 and

TI’s TL16C752B in the 48-TQFP package

Two independent UART channels

Device Identification and Revision

Crystal oscillator (up to 24MHz) or external clock

(upto 64MHz) input

48-TQFP and 32-QFN packages

TX & RX

■

64 Byte TX FIFO

64 Byte RX FIFO

Data rate of up to 8 Mbps at at 3.3 V, and

6.25 Mbps at 2.5 V with 8X sampling rate

Fractional Baud Rate Generator

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

•

ENDEC

FAX (510) 668-7017

RS-485

XR16V2750

GND

OP2A#

OP2B#

XTAL1

XTAL2

DSRA#, RTSA#,

DSRB#, RTSB#,

2.25 to 3.6 Volt VCC

TXA, RXA, DTRA#,

TXB, RXB, DTRB#,

DTSA#, CDA#, RIA#,

CTSB#, CDB#, RIB#,

Half-duplex

•

www.exar.com

2750BLK

REV. 1.0.3

Direction

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