DA7838.002
20 September, 2000
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The MAS7838 is a single chip duplex synchronous to
asynchronous converter. It converts asynchronous start
stop characters to synchronous character format, with
stop bit deletion when required as defined in the CCITT
recommendation V.14 (V.22). On the receiver channel
the MAS7838 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 (V.22).The MAS7838 implements
the data modes for the synchronous interface as
specified in the V.14 (V.22). The device can be
configured to operate at any frequency to maximum
device speed within the above mentioned modes.
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Implements CCITT recommendations V.14 and
V.22 chapters 4.1, 4.2 and 4.3
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Operates in modes as defined in the CCITT
recommendations V.22 (i), ii), iii), iv) and v)
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Transmission rate up to 64 kbit/s
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CMOS compatible interface
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Low power consumption (typically 25 mW)
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No additional circuitry required to perform the
conversion
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CMOS device
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Single =5V supply
$33/,&$7,21
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Adapts asynchronous terminals to synchronous
modems
Full or half card PC modems using UART as a
data source
Simplifying data multiplexing in a MUX/DEMUX
system
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CL1
CONTROL
VDD
CL2
XESR
TMG
OSC
TSL
TXC
TDO
RXC
RDI
XASY
>
_
1
SYNC
TO
ASYNC
ASYNC
TO
SYNC
O
S
C
TDI
RDO
XHST
VSS
1 (9)
MAS [ MICRO ANALOG SYSTEMS ]
