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XR-2125

Exar
Part Number XR-2125
Manufacturer Exar
Description Data Buffer
Published Apr 5, 2018
Detailed Description XR-2125 Data Buffer GENERAL DESCRIPTIDN The X R-2125 is a logic circu it designed to perform the data buffer function ...
Datasheet PDF File XR-2125 PDF File

XR-2125
XR-2125

Overview
XR-2125 Data Buffer GENERAL DESCRIPTIDN The X R-2125 is a logic circu it designed to perform the data buffer function for Bell 212A Type Modem Systems.
Both asynchronous to synchronous and synchronous to asynchronous conversion are performed at nominal data rates of 1200 bits per second.
The XR-2125 is selectable for character lengths of 9 or 10 bits.
Separate enable/d isable inputs are supplied for async to sync and sync to async converter sections.
These inputs allow the same data lines to be used for asynchronous or synchronous operation.
The receive data buffer section (sync to async) accepts input sync data (typically from the modem demodulator) at 1200 BPS and converts it to a 1219 BPS async data format.
The transm it data buffer (async to sync) accepts input async format data with a data rate of 1200 BPS +1%, -2.
5% and it is synchronized to 1200 BPS, which is typically sent to the modulator.
This section also provides break signal automatic extension.
FUNCTIONAL BLOCK DIAGRAM...


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