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Dallas Semiconducotr - Transmit Line Interface

Numéro de référence DS2186
Description Transmit Line Interface
Fabricant Dallas Semiconducotr 
Logo Dallas Semiconducotr 





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DS2186 fiche technique
DS2186
DS2186
Transmit Line Interface
FEATURES
Line interface for T1 (1.544 MHz) and CEPT (2.048
MHz) primary rate networks
On–chip transmit LBO (line build out) and line drivers
eliminate external components
Programmable output pulse shape supports short–
and long–loop applications
Supports bipolar and unipolar input data formats
Transparent B8ZS and HDB3 zero code suppression
modes
Compatible with DS2180A T1 and DS2181A CEPT
Transceivers DS2141A T1 and DS2143 E1 Control-
lers
Companion to the DS2187 Receive Line Interface
and DS2188 T1/CEPT Jitter Attenuator
Single 5V supply; low–power CMOS technology
PIN ASSIGNMENT
TAIS 1
20 LCLK
ZCSEN 2
19 LPOS
TCLKSEL 3
18 LNEG
LEN0 4
17 TCLK
LEN1 5
16 TPOS
LEN2 6
15 TNEG
VDD
TTIP
7
8
14 LB
13 MTIP
TRING 9
12 MRING
VSS 10
11 LF
20–PIN DIP (300 MIL)
TAIS
ZCSEN
TCLKSEL
LEN0
LEN1
LEN2
VDD
TTIP
TRING
VSS
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
LCLK
LPOS
LNEG
TCLK
TPOS
TNEG
LB
MTIP
MRING
LF
20–PIN SOIC (300 Mil)
DESCRIPTION
The DS2186 T1/CEPT Transmit Line Interface Chip in-
terfaces user equipment to North American (T1–1.544
MHz) and European (CEPT–2.048 MHz) primary rate
communications networks. The device is compatible
with all types of twisted pair and coax cable found in
such networks.
Key on–chip components include: programmable wave
shaping circuitry, line drivers, remote loopback, and
zero suppression logic. A line–coupling transformer is
the only external component required.
Short loop (DSX–1, 0 to 655 feet) and long loop (CSU; 0
dB, –7.5 dB and –15 dB) pulse templates found in T1
applications are supported. Appropriate CCITT recom-
mendations are met in the CEPT mode.
Application areas include DACS, CSU, CPE, channel
banks, and PABX–to–computer interfaces such as DMI
and CPI. The DS2186 supports ISDN–PRI (Primary
Rate Interface) specifications.
022798 1/11

PagesPages 11
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