ST16C654CJ68F Exar Corporation, ST16C654CJ68F Datasheet

ST16C654CJ68F

Manufacturer Part Number

ST16C654CJ68F

Description

PLCC68

Manufacturer

Exar Corporation

Datasheet

1.ST16C654CJ68F.pdf (51 pages)

Specifications of ST16C654CJ68F

Date_code

07+

Current page: 1 of 51
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AUGUST 2005

GENERAL DESCRIPTION

The ST16C654/654D

Universal Asynchronous Receiver and Transmitter

(UART) each with 64 bytes of transmit and receive

FIFOs, transmit and receive FIFO trigger levels,

automatic hardware and software flow control, and

data rates of up to 1.5 Mbps. Each UART has a set

of registers that provide the user with operating status

and control, receiver error indications, and modem

serial interface controls. Selectable interrupt polarity

provides flexibility to meet design requirements. An

internal

diagnostics. The 654 is available in 64 pin LQFP, 68

pin PLCC and 100 pin QFP packages. The 64 pin

package only offers the 16 mode interface, but the 68

and 100 pin packages offer an additional 68 mode

interface which allows easy integration with Motorola

processors.

three

ST16C654DCQ64

output.

FIFO status outputs (TXRDY# and RXRDY# A-D),

separate infrared transmit data outputs (IRTX A-D)

and channel C external clock input (CHCCLK). The

ST16C654/654D is compatible with the industry

standard ST16C454 and ST16C654/554D.

Exar

OTE

IGURE

RXRDY# A-D

TXRDY# A-D

Corporation 48720 Kato Road, Fremont CA, 94538

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

1. ST16C654 B

CHCCLK

CLKSEL

state

INTSEL

The 100 pin package provides additional

16/68#

D7:D0

A2:A0

loopback

CSD#

CSA#

CSB#

CSC#

IOW#

IOR#

INTC

INTD

Reset

INTB

INTA

The ST16C654CQ64 (64 pin) offers

interrupt

provides

capability

(654) is an enhanced quad

LOCK

Data Bus

Interface

output

IAGRAM

continuous

allows

while

onboard

interrupt

the

•

2.97V TO 5.5V QUAD UART WITH 64-BYTE FIFO

UART

(510) 668-7000

Regs

BRG

(same as Channel A)

Crystal Osc/Buffer

UART Channel C

UART Channel D

UART Channel B

FEATURES

•

APPLICATIONS

•

UART Channel A

Pin-to-pin compatible with ST16C454, ST16C554

and TI’s TL16C554AFN and TL16C754BFN

Intel or Motorola Data Bus Interface select

Four independent UART channels

2.97V to 5.5V supply operation

Sleep Mode (200 uA typical)

Crystal oscillator or external clock input

Portable Appliances

Telecommunication Network Routers

Ethernet Network Routers

Cellular Data Devices

Factory Automation and Process Controls

TX & RX

64 Byte TX FIFO

■

64 Byte RX FIFO

Data rates of up to 1.5 Mbps

64 Byte Transmit FIFO

64 Byte Receive FIFO with error tags

4 Selectable TX and RX FIFO Trigger Levels

Automatic Hardware (RTS/CTS) Flow Control

Automatic Software (Xon/Xoff) Flow Control

Progammable Xon/Xoff characters

Wireless Infrared (IrDA 1.0) Encoder/Decoder

Full modem interface

•

ENDEC

FAX (510) 668-7017

TXA, RXA, IRTXA, DTRA#,

DSRA#, RTSA#, CTSA#,

CDA#, RIA#

TXB, RXB, IRTXB, DTRB#,

DSRB#, RTSB#, CTSB#,

CDB#, RIB#

TXC, RXC, IRTXC, DTRC#,

DSRC#, RTSC#, CTSC#,

CDC#, RIC#

TXD, RXD, IRTXD, DTRD#,

DSRD#, RTSD#, CTSD#,

CDD#, RID#

2.97V to 5.5V VCC

GND

XTAL1

XTAL2

•

www.exar.com

654 BLK

REV. 5.0.2

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