ST16C552CJ68 Exar Corporation, ST16C552CJ68 Datasheet

ST16C552CJ68

Manufacturer Part Number

ST16C552CJ68

Description

PLCC68

Manufacturer

Exar Corporation

Datasheet

1.ST16C552CJ68.pdf (39 pages)

Specifications of ST16C552CJ68

Date_code

08+

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The ST16C552/ST16C552A (552/552A) is a dual universal asynchronous receiver and transmitter (UART) with

an added bi-directional parallel port that is directly compatible with a CENTRONICS type printer. The parallel port

is designed such that the user can configure it as general purpose I/O interface, or for connection to other printer

devices. The 552/552A provides enhanced UART functions with 16 byte FIFO’s, a modem control interface, and

data rates up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status.

The system interrupts and control may be tailored to meet user requirements. An internal loop-back capability

allows onboard diagnostics. A programmable baud rate generator is provided to select transmit and receive clock

rates from 50 bps to 1.5 Mbps. The 552/552A is available in a 68 pin PLCC package. The 552/552A is compatible

with the 16C450 and 16C550. The difference between the ST16C552 and ST16C552A is the logic state of the

printer port, INTP interrupt. The INTP interrupt is active high (logic 1) on the ST16C552 whereas INTP is active

low (logic 0) on the ST16C552A part when the interrupt latch mode is selected. The 552/552A is fabricated in an

advanced CMOS process with power down mode to reduce the power consumption. The 552A does not support

the power down mode.

Added features in device revision "F" and newer:

ST16C552AIJ68

ST16C552ACJ68

ST16C552CJ68

ST16C552IJ68

Part number

DESCRIPTION

FEATURES

Pin to pin and functional compatible to ST16C452/

452PS, TL16C552

2.97 to 5.5 volt operation

Software compatible with INS8250, NS16C550

1.5 Mbps transmit/receive operation (24MHz)

16 byte transmit FIFO

16 byte receive FIFO with error flags

Independent transmit and receive control

Modem and printer status registers

UART port and printer port Bi-directional

Printer port direction set by single control bit or 8 bit

pattern (AA/55)

Modem control signals (-CTS, -RTS, -DSR, -DTR,

-RI, -CD)

Programmable character lengths (5, 6, 7, 8)

Even, odd, or no parity bit generation and detection

TTL compatible inputs, outputs

Power down mode

ORDERING INFORMATION

5V Tolerant Inputs

Rev. 3.40

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017

Pins

Package

PLCC

-TXRDYA

-DTRB

-DTRA

-RTSB

-CTSB

-RTSA

VCC

TXB

TXA

DUAL UART WITH 16-BYTE FIFO AND

Operating temperature

0° C to + 70° C

-40° C to + 85° C

PLCC Package

PARALLEL PRINTER PORT

ST16C552ACJ68

ST16C552CJ68

ST16C552A

ST16C552

Device Status

Active

December 2003

INTB

INTP

-SLCTIN

INIT

-AUTOFDXT

-STROBE

GND

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

INTA

RDOUT

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