Rainbow-electronics DS2186 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Comunicação Rainbow-electronics DS2186. Rainbow Electronics DS2186 User Manual Manual do Utilizador

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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.
DS2186
Transmit Line Interface
DS2186
041295 1/11
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
LF
V
DD
V
SS
LF
20-Pin DIP (300 MIL)
TAIS
ZCSEN
TCLKSEL
LEN0
LEN1
LEN2
TTIP
TRING
LCLK
LPOS
LNEG
TCLK
TPOS
TNEG
LB
MTIP
MRING
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
ZCSEN
20-Pin SOIC (300 Mil)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
LCLK
LPOS
LNEG
TCLK
TPOS
TNEG
LB
MTIP
MRING
TAIS
TCLKSEL
LEN0
LEN1
LEN2
VDD
TTIP
TRING
VSS
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.
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Resumo do Conteúdo

Página 1 - Transmit Line Interface

Copyright 1995 by Dallas Semiconductor Corporation.All Rights Reserved. For important information regardingpatents and other intellectual property r

Página 2 - DS2186 BLOCK DIAGRAM Figure 1

DS2186041295 10/11DS2186 TRANSMIT LINE INTERFACE 20–PIN DIPABCEFGHJKD1DIM MIN MAX20-PINPKGA IN.MMB IN.MMC IN.MMD IN.MME IN.MMF IN.MMG IN.MMH IN.MMJ IN

Página 3 - WAVE SHAPING

DS2186041295 11/11DS2186S TRANSMIT LINE INTERFACE 20–PIN SOICAFCEphiJGKLHB1DIM MIN MAX20-PINPKGA IN.MMB IN.MMC IN.MME IN.MMF IN.MMG IN.MMH IN.MMJ IN.M

Página 4 - FAULT PROTECTION

RSTINTCSRAISLFVDDZCSENLEN0LEN1LEN2TCLKSELTAISTTIPTRINGVSSLCLKLNEGLPOSTCLKTPOSTNEGLBMTIPMRINGDS2186DS2187AVDDLCAPNCZCSENRCLKSELRTIPRRINGLOCKAVSSDVDDAIS

Página 5 - 041295 5/11

DS2186041295 3/11PIN DESCRIPTION Table 1PIN SYMBOL TYPE DESCRIPTION1 TAIS I Transmit Alarm Indication Signal. When high, output data isforced to all

Página 6 - 041295 6/11

DS2186041295 4/11The shape of the “pre–emphasized” T1 waveform iscontrolled by inputs LEN0, LEN1, and LEN2(TCLKSEL=0). These control inputs allow the

Página 7 - 041295 7/11

DS2186041295 5/11DSX–1 ISOLATED PULSE TEMPLATE Figure 31.00.50.0–0.50250 500 750 1000 1250NANOSECONDSNORMALIZEDALITITUDENOTES:1. Template shown is mea

Página 8 - 041295 8/11

DS2186041295 6/11OUTPUT PULSE TEMPLATE AT 2.048 MHz Figure 41.21.00.50.0–0.2250 500NANOSECONDSNORMALIZEDAMPLITUDENOTES:1. Unlike the DSX–1 template, w

Página 9 - AC TIMING DIAGRAM Figure 5

DS2186041295 7/11CHARACTERISTICS OF T1 AND CEPT INTERFACES Table 3CHARACTERISTIC T1 CEPTLINE RATE 1.544 MHz 2.048 MHzLINE CODE AMI1 or B8ZS AMI or HDB

Página 10

DS2186041295 8/11ABSOLUTE MAXIMUM RATINGS* Voltage on any Pin Relative to Ground 1.0V to +7V Operating Temperature 0°C to 70°C Storage Temperature –55

Página 11

DS2186041295 9/11AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VDD = 5V ± 5%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESTCLK, LCLK Period tCLK648 ns 1TCLK,

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