DS2182A Datasheet, PDF (1/25 Pages) Dallas Semiconductor – T1 Line Monitor

www.dalsemi.com
FEATURES
§ Performs framing and monitoring functions
Supports 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 counters
for 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 from
the original DS2182
DS2182A
T1 Line Monitor
The updated DS2182A includes the following
changes 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
PIN ASSIGNMENT
INT 1
SDI 2
SDO 3
CS 4
SCLK 5
NC 6
RYEL 7
RLINK 8
RLCLK 9
RCLK 10
RCHCLK 11
RSER 12
NC 13
VSS 14
28 VDD
27 RLOS
26 RFER
25 RBV
24 RCL
23 RNEG
22 RPOS
21 RST
20 TEST
19 RSIGSEL
18 RSIGFR
17 RABCD
16 RMSYNC
15 RFSYNC
28-Pin DIP (600-mil)
DESCRIPTION
The DS2182A T1 Line Monitor Chip is a monolithic CMOS device designed to monitor real-time
performance on T1 lines. The DS2182A frames to the data on the line, counts errors, and supplies
detailed information about the status and condition of the line. Large on-board counters allow the
accumulation of errors for extended periods, which permits a single CPU to monitor a number of T1
lines. Output clocks that are synchronized to the incoming data stream are provided for easy extraction of
S-Bits, FDL bits, signaling bits, and channel data. The DS2182A meets the requirements of ANSI
T1.231.
1 of 25
092299