CX28332 Conexant Systems, CX28332 Datasheet

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CX28332

Manufacturer Part Number
CX28332
Description
(CX28331 - CX28333) Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
Manufacturer
Conexant Systems
Datasheet

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Advance Information
This document contains information on a product under development. The parametric information
contains target parameters that are subject to change.
CX28331/CX28332/CX28333
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
The CX28333 is a three-channel, E3/DS3/STS-1 fully-integrated Line Interface Unit
(LIU). It is configured via external pins and does not need a microprocessor interface.
Each channel has an independent equalizer on the receive side requiring no user
configuration. Also, each channel has a programmable transmit pulse shaper that can
be set to ensure that the cross-connect pulse mask requirement is met for transmit
cable length up to 450 feet. The CX28332 is a dual-channel, and the CX28331 is a
single-channel LIU with performance identical to the CX28333.
where three DS3 or STS-1 channels are concentrated into a single STS-3 channel. By
including three independent transceivers on a chip, significant external components are
eliminated, with the exception of 1:1 coupling transformers, termination resistors, and
supply bypass capacitors.
NOTE:
Functional Block Diagram
Data Sheet
NOTE(S): The TX Monitor is only used with the 100-pin CX2833i-3X.
E3MODE
RLOOP
LLOOP
The CX28333 gives the user new economies of scale in concentrator applications
RNEG
RPOS
TPOS
TNEG
RLOS
RCLK
TCLK
TAIS
XOE
PDB
LBO
In this document, "i" is used to represent the number of channels:
i = 1 (CX28331), i = 2 (CX28332), and i = 3 (CX28333).
DATA
MUX
DECODER
ENCODER
PDATA/
NDATA
TCLK
DATCLK
PDATA
NDATA
Shaper
Recovery
Pulse
Clock/
Data
ALOS
P
N
DRIVER
LINE
Receiver
Monitor
TX
TLINEP
TLINEM/N
TMONP
TMONM
TXMON
TMONTST
REFCLK
RLINEP
RLINEM/N
REQH
LIU #1
LIU #2
LIU #3
Distinguishing Features
• Can be used as a data transceiver
• Programmable pulse filtering to meet
• Meets jitter specifications of Bellcore
• Large input dynamic range
• Alarms for coding violation and loss
• Full diagnostic loopback capability
• Uses a minimum of external
• Compatible with ITU-T G.703, G.823
• Independent power down mode per
• Easily interfaced to the DS3/E3
• Selectable B3ZS/HDB3
• Superior input receiver sensitivity
• Transmit monitor inputs (CX2833i-3x
Physical Characteristics
• 80- and 100-pin ETQFP package
• Single 3.3 V power supply
• 1 W maximum power dissipation
• –40 °C to +85 °C temperature range
• 5 V-tolerant pins
• TTL digital pins
Applications
• Digital Cross-Connect Systems
• Routers
• ATM Switches
• Channelized Line Aggregation Units
• Test Equipment
• Channel Service Units
• Multiplexers
over a maximum of 900 feet of Type
734/728 coaxial cable or equivalent
in an on-premise environment
cross-connect pulse masks (ANSI
T1.102-1993)
GR499, GR253, and TBR24 (with
external JAT).
of signal
components
channel
Framer IC (CX28342/3/4/6/8 and
CN8330)
encoding/decoding
(< 25 mV)
series only)
(CX28333)
June 2, 2000
100985A

Related parts for CX28332

CX28332 Summary of contents

Page 1

... Also, each channel has a programmable transmit pulse shaper that can be set to ensure that the cross-connect pulse mask requirement is met for transmit cable length up to 450 feet. The CX28332 is a dual-channel, and the CX28331 is a single-channel LIU with performance identical to the CX28333. ...

Page 2

... Conexant products for use in such applications their own risk and agree to fully indemnify Conexant for any damages resulting from such improper use or sale. The following are trademarks of Conexant Systems, Inc.: Conexant™, the Conexant C symbol, and “What’s Next in Communications Technologies”™. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. For additional disclaimer information, please consult Conexant’ ...

Page 3

... Ordering Information Model Number Package CX28331-1x 80-Pin ETQFP CX28332-1x 80-Pin ETQFP CX28333-1x 80-Pin ETQFP CX28331-3x 100-Pin ETQFP CX28332-3x 100-Pin ETQFP CX28333-3x 100-Pin ETQFP Revision History Revision Level A — 100985A Description Single-channel LIU Dual-channel LIU Triple-channel LIU Single channel with Transmit Monitoring ...

Page 4

Conexant ...

Page 5

... B3ZS/HDB3 Decoder With Bipolar Violation Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 Data Squelching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2.3.7 Jitter Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2.4 2.4.1 Jitter Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 Additional CX28331/CX28332/CX28333 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.5 Bias Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.5.1 Power-On Reset (POR 2-16 2.5.2 2.5.3 Loopback Multiplexers (MUXes) ...

Page 6

... PCB Design Considerations for CX28331/CX28332/CX28333 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1.1 Power Supply and Ground Plane ...

Page 7

... CX28332-1x Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Figure 1-3. CX28333-1x Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Figure 1-4. CX28331-3x Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 Figure 1-5. CX28332-3x Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Figure 1-6. CX28333-3x Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 Figure 2-1. Typical Application Of Single CX2833i Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Figure 2-2. Pulse Shaper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Figure 2-3 ...

Page 8

... List of Figures viii CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

Page 9

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit List of Tables Table 1-1. CX28331/CX28332/CX28333 Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Table 1-2. CX2833i-3x Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 Table 2-1. DS3 Transmit Template Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Table 2-2 ...

Page 10

... List of Tables x CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

Page 11

... CX2833i-1x pin descriptions. (CX28331-3x), 1-5 (CX28332-3x), and Table 1-2 All digital inputs and outputs contain 75 k When power is disconnected from the device, TLINE pins are low impedance to ground if driven by more than one forward-bias diode voltage (0.7 V) below ground. Additionally, driving TLINE, a forward-bias diode voltage above the VGG pin, creates a low impedance path from the TLINE pin to the VGG pin ...

Page 12

... VSS 8 TVSS 9 TLINEP 10 TLINEN 11 TVDD 12 RVDD 13 RLINEP 14 RLINEN 15 RVSS 16 VSS VDD 20 1-2 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit CX28331- Conexant DVDDC ENDECDIS PD RLOOP LLOOP RNEG/RLCV RPOS/RNRZ RCLK RLOS ...

Page 13

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 1-2. CX28332-1x Pin Diagram TVSS1 1 TLINE1P 2 TLINE1N 3 TVDD1 4 RVDD1 5 RLINE1P 6 RLINE1N 7 RVSS1 8 VSS VDD 12 13 VDD VSS 16 TVSS2 17 TLINE2P 18 TLINE2N 19 TVDD2 20 100985A CX28332- ...

Page 14

... RLINE1P 6 RLINE1N 7 RVSS1 8 TVSS2 9 TLINE2P 10 TLINE2N 11 TVDD2 12 RVDD2 13 RLINE2P 14 RLINE2N 15 RVSS2 16 TVSS3 17 TLINE3P 18 TLINE3N 19 TVDD3 20 1-4 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit CX28333- Conexant DVDDC ENDECDIS PD2 RLOOP2 LLOOP2 RNEG2/RLCV2 RPOS2/RNRZ2 RCLK2 ...

Page 15

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-1. CX2833i-1x Pin Definitions ( Pin # CX28331-1x CX28332-1x CX28333-1x 14 — — — — — — — — — — 22 — — — — — — — — — ...

Page 16

... Pin Description 1.1 Pin Assignments Table 1-1. CX2833i-1x Pin Definitions ( Pin # CX28331-1x CX28332-1x CX28333-1x 54 — — — — — — — — — — 33 — — — — — — — — — — ...

Page 17

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-1. CX2833i-1x Pin Definitions ( Pin # CX28331-1x CX28332-1x CX28333-1x 50 — — — — — — — — — — — — — — — — — ...

Page 18

... Pin Description 1.1 Pin Assignments Table 1-1. CX2833i-1x Pin Definitions ( Pin # CX28331-1x CX28332-1x CX28333- — — — — — — — — — — — — — — — — — — ...

Page 19

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-1. CX2833i-1x Pin Definitions ( Pin # CX28331-1x CX28332-1x CX28333-1x 46 — — — — — — — — — — — — — — — — — — ...

Page 20

... Pin Description 1.1 Pin Assignments Table 1-1. CX2833i-1x Pin Definitions ( Pin # CX28331-1x CX28332-1x CX28333- 20, 21 12, 13 — 17 — 58 — — — — — — — — — — — — ...

Page 21

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 1-4. CX28331-3x Pin Diagram VDD 5 VDD VSS 9 TVSS 10 TMONP 11 TLINEP 12 TLINEM 13 TMONM 14 TVDD 15 RVDD 16 RLINEP 17 RLINEM 18 RVSS 19 VSS VDD 25 100985A ...

Page 22

... Pin Description 1.1 Pin Assignments Figure 1-5. CX28332-3x Pin Diagram TMON1P 1 TLINE1P 2 TLINE1M 3 TMON1M 4 TVDD1 5 RVDD1 6 RLINE1P 7 RLINE1M 8 RVSS1 9 VSS VDD 15 VDD VSS 19 TVSS2 20 TMON2P 21 TLINE2P 22 TLINE2M 23 TMON2M 24 TVDD2 25 1-12 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit ...

Page 23

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 1-6. CX28333-3x Pin Diagram TMON1P 1 TLINE1P 2 TLINE1M 3 TMON1M 4 TVDD1 5 RVDD1 6 RLINE1P 7 RLINE1M 8 RVSS1 9 TVSS2 10 TMON2P 11 TLINE2P 12 TLINE2M 13 TMON2M 14 TVDD2 15 RVDD2 16 RLINE2P 17 RLINE2M 18 RVSS2 19 TVSS3 20 TMON3P 21 TLINE3P 22 TLINE3M 23 TMON3M 24 TVDD3 25 100985A ...

Page 24

... Pin Description 1.1 Pin Assignments Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 17 — — — — — — — — — — 27 — — — — — — — — — — ...

Page 25

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 69 — — — — — — — — — — 41 — — — — — — — — 42 100985A ...

Page 26

... Pin Description 1.1 Pin Assignments Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 61 — — — — — — — — — — 47 — — — — — — — — — — ...

Page 27

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333- — — — — — — — — — — — — 34 100985A Signal Name Description I/O/P Control Signals ...

Page 28

... Pin Description 1.1 Pin Assignments Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 71 — — — — — — — — — — — — — — — — — — — ...

Page 29

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 10 — — — 100 100 — — — — — — — — — — — — — — ...

Page 30

... Pin Description 1.1 Pin Assignments Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 58 — — — — — — — — — — — — — — — — 21 — ...

Page 31

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Table 1-2. CX2833i-3x Pin Definitions ( Pin # CX28331-3x CX28332-3x CX28333-3x 1– 11–14, 37, 38, 39, 21–24, 27, 17–18, 50, 64, 65, 28, 30–32, 37–39, 50, 66, 86, 87, 34–50, 52, 52, 55–73, 88 64–66, 86–88 76–91, 93–95 NOTE(S): (1) This pin should be connected to 3 all-3.3 V design. ...

Page 32

... Pin Description 1.1 Pin Assignments 1-22 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

Page 33

... NRZ output or sending out a non-decoded dual rail. CX28331 and CX28332 are single- and dual-E3/DS3/STS-1 LIUs, respectively. In all respects, their performance and features are identical to the CX28333. ...

Page 34

... Figure 2-1. Typical Application Of Single CX2833i Channel 0–450 ft COAX TX (type 734/728) 0–450 ft COAX RX (type 734/728) 2-2 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 2-1 illustrates a typical application using the CX2833i in a 0–450 ft COAX DSX (type 734/728) 0–450 ft COAX DSX (type 734/728) Conexant CX28331/CX28332/CX28333 RX TX 100604_012 100985A ...

Page 35

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.2 Transmitter This section describes the detailed operation of the various blocks in the CX2833i transmitter. 2.2.1 AMI B3ZS/HDB3 Encoder ENDECDIS and the E3MODE pins configure the encoder mode. When ENDECDIS = 0, the encoder is receiving non-encoded Nonreturn to Zero (NRZ) data on the TNRZ (TPOS) pin alone, and the NC (no connect) (TNEG) pin is ignored ...

Page 36

... Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit differential load. Driver gain accounts for the 6 dB gain illustrates the Pulse/Power template measurement points for the Pulse/Power Template for DS3/STS-1 0–450 ft COAX DSX (type 734/728) 0–450 ft COAX DSX (type 734/728) Conexant CX28331/CX28332/CX28333 RX TX 100604_013 100985A ...

Page 37

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.2.3.1 Transmit Pulse Mask Templates Figure 2-4. Transmit Pulse Mask for DS3 Rates 1.2 1 0.8 0.6 0.4 0.2 0 0.2 1 Table 2-1. DS3 Transmit Template Specifications Time Axis Range (UI) Upper Curve –0.85 T –0.68 –0.68 T 0.36 0.36 T 1.4 Lower Curve –0.85 T –0.36 –0.36 T 0.36 0.36 T 1.4 100985A Transmit Pulse Mask for STS-1 Rates ...

Page 38

... Upper Curve –0.85 T –0.68 –0.68 T 0.26 0.26 T 1.4 Lower Curve –0.85 T –0.38 –0.38 T 0.36 0.36 T 1.4 2-6 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Transmit Pulse Mask for STS-1 Rates 0 0.5 Normalized Symbol Time Normalized Amplitude Equation 0.03 0.03 + 0.5{1 + sin[(pi / 2)( 0.34)]} –2.4(T – 0.26) 0.1 + 0.61 e –0.03 –0.03 + 0.5{1 + sin[(pi / 2)( 0.18)]} 0.03 Conexant CX28331/CX28332/CX28333 1 1.5 100985_014 100985A ...

Page 39

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 2-6. Transmit Pulse Mask for E3 Rate 0.2 0.2 Volts Normalized 0.1 0.1 0.1 100985A 17 ns 0.1 14.55 ns 0.1 8.65 ns 12.1 ns 24.5 ns 29.1 ns Time Conexant 2.0 Functional Description 2.2 Transmitter 100985_007 2-7 ...

Page 40

... A special pin (TMONTST) is available for testing board-level functionality downstream from the TLOS outputs. When TMONST is high it will assert all TLOS channel outputs. TLOS outputs are active high when the monitor inputs do not detect a signal. 2-8 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 2-7 illustrates the AIS signal. Conexant ...

Page 41

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.2.6 Jitter Generation (Intrinsic) The CX2833i device meets the jitter generation requirements for various rates with large margins, with the condition that the input transmit clock (TCLK) is jitter-free. Data rates and jitter generation requirements are defined in the following documents: • ...

Page 42

... DS3/STS-1 standards) is transmitted to the receiver. A square-shaped input has a much larger high-frequency content and could have overshoots at the EQ output high enough to cause bit errors. Setting REQH = 0 will lower the gain and reduce the amount of overshoot. 2-10 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

Page 43

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.3.4 The PLL Clock Recovery Circuit The clock recovery circuit (RX PLL) extracts the embedded clock from the sliced data and provides this clock and the retimed data to the decoder (data mode). Upon startup (after the internal reset is deasserted), the RX PLL uses a reference clock (REFCLK, running at the symbol rate) and a phase-frequency detector to lock to the correct data rate (reference mode) ...

Page 44

... The data squelching is true in both NRZ and dual rail mode. When the input signal has been properly amplified and equalized, the clock recovery PLL will then switch to the incoming data. 2-12 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.9). Conexant CX28331/CX28332/CX28333 100985A ...

Page 45

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.4 Jitter Tolerance The CX2833i receiver is able to tolerate a specified amount of high-frequency jitter in the received signal while providing error-free operation (generally defined as a bit error rate of less than 10 Figure • E3 rate – ITU-T G.823 and ETSI TBR24 contain frequency masks for input NOTE: • ...

Page 46

... Figure 2-8. Minimum Jitter Tolerance Requirement 1.0 UI 0.1 UI 100 1 2-14 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit E3 Rate 1 kHz 10 kHz 100 kHz Jitter Frequency DS3 / STS-1 Rates 100 Hz 1 kHz 10 kHz Jitter Frequency Conexant CX28331/CX28332/CX28333 1 MHz STS-1 DS3 Category I DS3 Category II 100 kHz 100604_014 100985A ...

Page 47

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.4.1 Jitter Transfer The receiver must meet certain jitter transfer specifications between the input and output jitter as a function of frequency. These specifications are only intended to be met with the use of a jitter attenuator. Because the CX2833i does not contain a jitter attenuator, one will have to be supplied externally ...

Page 48

... In local loopback, set by asserting pin LLOOP, the transmit data loops back immediately from the encoder output to the decoder input in place of the received data. Additionally, this data is sent out the TLINEP and TLINEM/N pins. 2-16 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Capacitance should be kept to a minimum on the RBIAS pin. Conexant CX28331/CX28332/CX28333 Table 2-4). 100985A ...

Page 49

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.6 Mechanical Specifications Figure 2-10. CX2833i-1x Mechanical Drawing (80-Pin)—Dimensions Pin # Ref. Mark TOP DETAIL B 100985A Dim. A See DETAIL ...

Page 50

... Dim. A See DETAIL Coplanarity Ref. 100-Pin ETQFP (GP00-D543)mm Conexant CX28331/CX28332/CX28333 D 3 BOTTOM Millimeters Inches Min. Max. Min. Max. 1.20 MAX. 0.047 MAX. 0.05 0.15 0.002 0.006 0.95 1.05 0.004 0.041 15.75 16.25 0.620 0.640 13.90 14.10 0.547 ...

Page 51

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.7 Electrical Characteristics 2.7.1 Absolute Maximum Ratings Table 2-3. Absolute Maximum Ratings DVDDC/ RVDD/ TVDD/ VDD VSOL FIT NOTE(S): 1. Stresses above those listed as absolute maximum ratings may cause permanent damage to the device. This is a stress rating only, and functional operation of the device at these or any other conditions beyond those indicated in the other sections of this document is not implied ...

Page 52

... Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit specifies various operating conditions, power supplies, and the bias Parameter Conditions DVDDC, RVDD, TVDD, VDD VGG (1) Total chip Total chip Total chip Pin RBIAS to GND; ±1% Conexant CX28331/CX28332/CX28333 Min Nom Max Unit 3.135 3.3 3.465 V 3.135 5 5.5 V — ...

Page 53

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit 2.8 DC Characteristics Table 2-5. DC Characteristics Parameter V high threshold Digital inputs ih V low threshold Digital inputs il V high threshold Digital outputs low threshold Digital outputs digital Vin LEAK Input capacitance Load capacitance Digital outputs NOTE(S): 1 ...

Page 54

... Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Parameter Conditions E3 DS-3 STS-1 Towidth/Tosym, RCLK Tiwidth/Tisym, TCLK Tiwidth/Tisym, REFCLK — TPOS/TNRZ, TNEG, TAIS TPOS/TNRZ, TNEG, TAIS Figure 2-12, describes the logical relationship between Conexant CX28331/CX28332/CX28333 Min Nom Max Unit — 29.10 — ns 22.35 ns 19. — ...

Page 55

... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 2-12. Timing Diagram DATA OUTPUTS RCLK RPOS/RNRZ, RNEG/RLCV DATA INPUTS TCLK TPOS/TNRZ, TNEG, TAIS, 100985A Tosym Todelay Tisym Tisetup Don't Valid Data Care Conexant 2.0 Functional Description 2.9 AC Characteristics Towidth Tiwidth Tihold Don't Care 100604_016 2-23 ...

Page 56

... Functional Description 2.9 AC Characteristics 2-24 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

Page 57

... Applications The CX28331/CX28332/CX28333 can be used in a variety of applications. Figure 3-1 CX28333. The data and clock are extracted and passed on to the framer chip for further data manipulation and user interface important to employ high-frequency design techniques for the printed board layout. 3.1 PCB Design Considerations for CX2833i The CX28333 device is a triple LIU operating at frequencies ...

Page 58

... Corporation. The bulk capacitor used for where the power enters the board should be a tantulum–type capacitor, the recommended value and type is a 220 tantulum capacitor. 3.1.4 IBIS Models IBIS (Input/Output Buffer Interface Specification) models for the CX28331/CX28332/CX28333-1x and -3x are available from Conexant’s web site (www.conexant.com). 3.1.5 Recommended Vendors Product: Transformers America ...

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... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure 3-1. TPOS TNEG TCLK Framer RPOS RNEG RCLK MODE TPOS TNEG TCLK Framer RPOS RNEG RCLK MODE TPOS TNEG TCLK Framer RPOS RNEG RCLK MODE MODE Mode/Status Pins NOTE(S): 1. All transformers are part number T3001 from Pulse Technology. See Recommended Vendors, 2 ...

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... Applications 3.1 PCB Design Considerations for CX2833i 3-4 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

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Appendix A A.1 Applicable Standards The applicable standards documents are as follows: • ANSI T1.102-1993 (DS3 and STS-1 standard) • ANSI T1.404a-1996 (DS3 metallic interface) • ITU Recommendation G.703 (DS3 and E3 standard) • ITU Recommendation G.823 and G.824 (jitter ...

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... Appendix A A.1 Applicable Standards A-2 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985A ...

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Appendix B B.1 Evaluation Module Schematic 100985A B Conexant B-1 ...

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... RNEG1/RLCV1 RNEG3/RLCV3 69 32 REQH1/TMUXDAT REQH3/TMUXA1 70 31 XOE1 XOE3 71 30 LBO1 LBO3 72 29 DVDD2 DVSS2 73 28 LLOOP1 LLOOP3 74 27 RLOOP1 RLOOP3 75 26 PDB1 PDB3 76 25 TMUXIO2 RVSS3 77 24 TMUXIO1 RLINE3M 78 23 VGG RLINE3P 79 22 RBIAS RVDD3 80 21 Conexant CX28331/CX28332/CX28333 100985_017 100985A ...

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... CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Figure B-2. Recommended Schematic for the CX2833i-3x Device ( 100985A B.1 Evaluation Module Schematic Conexant Appendix B 100985_010 B-3 ...

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... Appendix B B.1 Evaluation Module Schematic Figure B-3. Recommended Schematic for the CX2833i-3x Device ( B-4 CX28331/CX28332/CX28333 Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit Conexant 100985_011 100985A ...

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... Shimomoto Building 1-46-3 Hatsudai, Shibuya-ku, Tokyo 151-0061 Japan Phone: (81 3) 5371 1567 Fax: (81 3) 5371 1501 Taiwan Headquarters Conexant Systems, Taiwan Co., Ltd. Room 2808 International Trade Building 333 Keelung Road, Section 1 Taipei 110, Taiwan, ROC Phone: (886 2) 2720 0282 Fax: (886 2) 2757 6760 ...

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