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CD22103AD Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer CD22103AD
Beschreibung CMOS HDB3 High Density Bipolar 3 Transcoder for 2.048/8.448Mb/s Transmission Applications
Hersteller Intersil Corporation
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Gesamt 7 Seiten
CD22103AD Datasheet, Funktion
Data Sheet
CD22103A
January 1997 File Number 1310.3
CMOS HDB3 (High Density Bipolar 3)
Transcoder for 2.048/8.448Mb/s
Transmission Applications
The CD22103A is an LSI SOS integrated circuit which
performs the HDB3 transmission coding and reception
decoding functions with error detection. It is used in
2.048Mb/s and 8.448Mb/s transmission applications. The
CD22103A performs HDB3 coding and decoding for data
rates from 50Kb/s to 10Mb/s in a manner consistent with
CCITT G703 recommendations.
HDB3 transmission coding/reception decoding with code
error detection is performed in independent coder and
decoder sections. All transmitter and receiver inputs/outputs
are TTL compatible.
The HDB3 transmitter coder codes an NRZ binary unipolar
input signal (NRZ-IN) and a synchronous transmission clock
(CTX) into two HDB3 binary unipolar RZ output signals
(+HDB3 OUT, -HDB3 OUT). The TTL compatible output
signals +HDB3 OUT, -HDB3 OUT are externally mixed to
generate ternary bipolar HDB3 signals for driving
transmission lines.
The receiver decoder converts binary unipolar inputs
(+HDB3 IN, -HDB3 IN), which were externally split from
ternary bipolar HDB3 signals, and a synchronous clock
signal (CRX) into binary unipolar NRZ signals (NRZ-OUT).
The CD22103A operates with a 5V ±10% power supply
voltage over the full military temperature range at data rates
from 50Kb/s up to 10Mb/s.
Block Diagram
HDB3/AMI
CTX
NRZ-IN
ENCODER
IN
TRANSMITTER
CODER
LTE
+HDB3 OUT
-HDB3 OUT
CKR
+HDB3 IN
-HDB3 IN
CRX
DECODER
REQUIRES CLOCK
RECOVERY CIRCUIT
RECEIVER
DECODER NRZ-OUT
ERROR
DETECT
ERR
RAIS
AIS
DETECT
AIS
Features
• HDB3 Coding and Decoding for Data Rates from 50Kb/s
to 10Mb/s in a Manner Consistent with CCITT G703
Recommendations
• HDB3/AMI Transmission Coding/Reception Decoding with
Code Error Detection is Performed in Independent Coder
and Decoder Sections
• All Transmitter and Receiver Inputs/Outputs are TTL
Compatible
• Internal Loop Test Capability
• Pin and Functionally Compatible with Type MJ1471
Ordering Information
PART
NUMBER
CD22103AD
CD22103AE
TEMP. RANGE
(oC) PACKAGE
-55 to 125 16 Ld SBDIP
-40 to 85 16 Ld PDIP
PKG. NO.
D16.3
E16.3
Pinout
CD22103A (PDIP, SBDIP)
TOP VIEW
NRZ-IN 1
CTX 2
HDB3/AMI 3
NRZ-OUT 4
CRX 5
RAIS 6
AIS 7
VSS 8
16 VDD
15 +HDB3 OUT
14 -HDB3 OUT
13 +HDB3 IN
12 LTE
11 -HDB3 IN
10 CKR
9 ERR
68 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999






CD22103AD Datasheet, Funktion
CD22103A
CKR
50%
ττ
CRX
tP tD
50%
FIGURE 5. CRX RECONSTRUCTION REQUIREMENTS
CRX
NRZ - OUT DATA
RAIS
AIS
FIGURE 6. RECEIVER ALARM-INHIBIT-SIGNALS TIMING WAVEFORMS
CRX
+HDB3 IN
-HDB3 IN
ERR
FIGURE 7. RECEIVER ERROR-SIGNALS TIMING WAVEFORMS
Definition of HDB3 Code Used in CD22103A HDB3
Transcoder (As Per CCITRT G703 Annex
Recommendations) and Error Detection
Coding Of A Binary Signal Into An HDB3 Signal Is Done
According To The Following Rules:
1. HDB3 signal is pseudoternary; the three states are
denoted B+, B-, and 0.
2. Spaces (zeros) in the binary NRZ signal are coded as
spaces in the HDB3 signal. For strings of four spaces,
however, special rules apply (See Item 4 below).
3. Marks (ones) in the binary signal are coded alternately as
B+ and B- in the HDB3 signal (alternate mark inversion).
Violations of the rule of alternate mark inversion are intro-
duced when coding strings of four spaces (See Item 4
below).
4. Strings of four spaces in the binary signal are coded
according to the followinq rules:
A. The first space of a string is coded as a space if the polar-
ity of the preceding mark of the HDB3 signal has a polarity
opposite to the preceding violation and is not a violation by
itself; it is coded as a mark, i.e., not a violation (i.e., B+ or
B-), if the preceding mark of the HDB3 signal has the same
polarity as that of the preceding violation or is by itself a
violation.
This rule ensures that successive violations are of alter-
nate polarity so that no DC component is introduced.
B. The second and third spaces of a string are always coded
as spaces.
C. The last space of a string of four is always coded as a
mark, the polarity of which is such that it violates the rule of
alternate mark inversion. Such violations are denoted V+
or V- according to their polarity.
73

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