Rainbow Electronics DS2151Q - Manual

E Copyright 1995 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
DS2151Q
T1 Single–Chip Transceiver
DS2151Q
022697 1/46
FEATURES
•
Complete DS1/ISDN–PRI transceiver functionality
•
Line interface can handle both long and short haul
trunks
•
32–bit or 128–bit jitter attenuator
•
Generates DSX–1 and CSU line build outs
•
Frames to D4, ESF, and SLC–96 R formats
•
Dual onboard two–frame elastic store slip buffers that
connect to backplanes up to 8.192 MHz
•
8–bit parallel control port that can be used on either
multiplexed or non–multiplexed buses
•
Extracts and inserts Robbed–Bit signaling
•
Detects and generates yellow and blue alarms
•
Programmable output clocks for Fractional T1
•
Fully independent transmit and receive functionality
•
Onboard FDL support circuitry
•
Generates and detects CSU loop codes
•
Contains ANSI one’s density monitor and enforcer
•
Large path and line error counters including BPV, CV,
CRC6, and framing bit errors
•
Pin compatible with DS2153Q E1 Single–Chip Trans-
ceiver
•
5V supply; low power CMOS
•
Industrial grade version (–40
°
C to +85
°
C) available
(DS2151QN)
PIN ASSIGNMENT
LONG & SHOR
T
HAUL
LINE INTERF
ACE
PARALLEL CONTROL
PORT
FRAMER
ELASTIC ST
ORES
Functional Blocks
7
8
9
10
11
12
13
14
15
16
17 39
38
37
36
35
34
33
32
31
30
29
18 19 20 21 22 23 24 25 26 27 28
6 5 4 3 2 1
44 43 42 41 40
TSER
TCLK
DVDD
TSYNC
TLINK
TLCLK
TCHBLK
TRING
TVDD
TVSS
TTIP ALE
WR
RLINK
RLCLK
DVSS
RCLK
RCHCLK
RSER
RSYNC
RLOS/LOTC
SYSCLK
RCHBLK
ACLKI
BTS R
TIP
RRING R
VDD
R
VSS
XT
AL1
XT
AL2
INT1 INT2
CS RD AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 TCHCLK
DALLAS
DS2151Q
T1 SCT
Actual Size of
44–pin PLCC
DESCRIPTION
The DS2151Q T1 Single–Chip Transceiver (SCT) con-
tains all of the necessary functions for connection to T1
lines whether they be DS–1 long haul or DSX–1 short
haul. The clock recovery circuitry automatically adjusts to T1 lines from 0 feet to over 6000 feet in length. The
device can generate both DSX–1 line build outs as well
as CSU build outs of –7.5 dB, –15 dB, and –22.5 dB.
The onboard jitter attenuator (selectable to either 32 bits