MAS9138 MAS, MAS9138 Datasheet

MAS9138

Manufacturer Part Number

MAS9138

Description

ASYNCHRONOUS TO SYNCHRONOUS CONVERTER

Manufacturer

MAS

Datasheet

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DESCRIPTION

MAS9138 is a single chip duplex asynchronous to

synchronous converter. It converts asynchronous start

stop characters to synchronous format, with stop bit

deletion when required as defined in the CCITT

recommendation V.14. On the receiver channel

MAS9138 converts the incoming synchronous data to

asynchronous start stop character format with stop bit

insertion when required as defined in the CCITT

recommendation V.14. MAS9138 implements the data

FEATURES

•

BLOCK DIAGRAM

Implements CCITT recommendation V.14

Bypass operation

Character length from 8 to 11 bits including start

stop and parity bits

CMOS and LS-TTL compatible interface

Low power consumption (typically 10 mW)

No additional circuitry needed to perform conversion

Single +3.3...+5V supply

Operating temperature -40

16-pin PDIP and SO package

ASYNCHRONOUS TO SYNCHRONOUS CONVERTER

• Pin compatible with MAS7838

• Interfaces a duplex asynchronous to synchronous channel

• Modem speeds of 600, 1.2k, 2.4k, 4.8k, 7.2k, 9.6k, 12k,

14.4k, 19.2k and 38.4k bps with a single 4.9152 MHz crystal

XESR

XASY

XHST

TMG

OSC

TXC

TDO

RXC

VSS

CL1

CL2

TSL

RDI

C to 85

CONTROL

MAS9138

ASYNC

SYNC

APPLICATION

•

modes for the synchronous interface as specified in the

V.14. MAS9138 can be configured to operate at any

frequency up to 38.4 kbits/s within these modes. The

device contains a bit generator and frequency selection

logic to allow easy operation at other data rates. With

just one crystal the device can adapt to ten (10)

different bit rates so it is ideally suited to be used with

the most common modem systems ranging from V.22

to V.34.

Data communication systems

Adapts asynchronous terminals to synchronous

modems

Full or half card PC modems using UART as a data

source

Simplifying data multiplexing systems

RDO

VDD

TDI

MAS9138

12 April, 2006

DA9138.005

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