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The DS2182A T1 Line Monitor Chip is a monolithic CMOS device designed to monitor real-timeperformance on T1lines. The DS2182A frames to the data on the line, counts errors, and suppliesdetailed information about the status and condition of the line. Large on-board counters allow theaccumulation of errors for extendedperiods, which permits a single CPU to monitor a number of T1lines. Output clocks that aresynchronized to the incoming data stream are provided for easy extraction ofS-Bits, FDL bits, signaling bits, and channel data. The DS2182A meets the requirements of ANSIT1.231.
DS2182A Maximum Ratings
Voltage on Any Pin Relative to Ground..........-0.1V to +7.0V Operating Temperature .....................................-0°to 70 Storage Temperature .................................--55to +125 Soldering Temperature ...........-..........-260for 10 seconds
DS2182A Features
Performs framing and monitoring functionsSupports Superframe and Extended Super-frame formats Four onboard error counters 16-bit bipolar violation 8-bit CRC 8-bit OOF 8-bit frame bit error Indication of the following yellow and blue alarms incoming B8ZS code words 8 and 16 zero strings change of frame alignment loss of sync carrier loss Simple serial interface used for config-uration, control and status monitoring Burst mode allows quick access to countersfor status updates Automatic counter reset feature Single 5V supply; low-power CMOS tech-nology Available in 28-pin DIP and 28-pin PLCC The DS2182A is upward-compatible fromthe original DS2182The updated DS2182A includes the followingchanges from the original DS2182: Ability to count excessive zeros Severely Errored Framing Event indication Updated AIS detection Updated RCL detection AIS and RCL alarm clear indications