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Номер в каталоге(s) : XRT75L00 XRT75L00IV
Exar
Exar Corporation
Компоненты Описание : E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER Attenuator

GENERAL DESCRIPTION
The XRT75L00 is a single-channel fully integrated Line Interface Unit (LIU) with Jitter Attenuator for E3/DS3/STS-1 applications. It incorporates an independent Receiver, Transmitter and Jitter Attenuator in a single 52 pin TQFP package.

FEATURES
RECEIVER:
• On chip Clock and Data Recovery circuit for high input jitter tolerance.
• Meets E3/DS3/STS-1 Jitter Tolerance Requirements.
• Detects and Clears LOS as per G.775.
• Meets Bellcore GR-499 CORE Jitter Transfer Requirements.
• Receiver Monitor mode handles up to 20 dB flat loss with 6 dB cable attenuation.
• Compliant with jitter transfer template outlined in ITU G.751, G.752, G.755 and GR-499-CORE,1995 standards.
• Meets ETSI TBR 24 Jitter Transfer Requirements.
• On chip B3ZS/HDB3 encoder and decoder that can be either enabled or disabled
• On-chip clock synthesizer provides the appropriate rate clock from a single 12.288 MHz Clock.
• Provides low jitter output clock.

TRANSMITTER:
• Compliant with Bellcore GR-499, GR-253 and ANSI T1.102 Specification for transmit pulse
• Tri-state Transmit output capability for redundancy applications
• Transmitter can be turned on or off.

JITTER Attenuator:
• On chip advanced crystal-less Jitter Attenuator.
• Jitter Attenuator can be selected in Receive or Transmit paths.
• 16 or 32 bits selectable FIFO size.
• Meets the Jitter and Wander specifications described in T1.105.03b,ETSI TBR-24, Bellcore GR-253 and GR-499 standards.
• Jitter Attenuator can be disabled.

CONTROL AND DIAGNOSTICS:
• 5 wire Serial Microprocessor Interface for control and configuration.
• Supports optional internal Transmit Driver Monitoring.
• PRBS error counter register to accumulate errors.
• Hardware Mode for control and configuration.
• Supports Local, Remote and Digital Loop-backs.
• Single 3.3 V ± 5% power supply.
• 5 V Tolerant I/O.
• Available in 52 pin TQFP.
• -40°C to 85°C Industrial Temperature Range.

APPLICATIONS
• E3/DS3 Access Equipment.
• DSLAMs.
• Digital Cross Connect Systems.
• CSU/DSU Equipment.
• Routers.
• Fiber Optic Terminals.

Номер в каталоге(s) : XRT75L03 XRT75L03IV
Exar
Exar Corporation
Компоненты Описание : THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER Attenuator

GENERAL DESCRIPTION
The XRT75L03 is a three-channel fully integrated Line Interface Unit (LIU) with Jitter Attenuator for E3/DS3/STS-1 applications. It incorporates 3 independent Receivers, Transmitters and Jitter Attenuators in a single 128 pin LQFP package.

FEATURES
RECEIVER:
• On chip Clock and Data Recovery circuit for high input jitter tolerance
• Meets E3/DS3/STS-1 Jitter Tolerance Requirement
• Detects and Clears LOS as per G.775
• Receiver Monitor mode handles up to 20 dB flat loss with 6 dB cable attenuation
• On chip B3ZS/HDB3 encoder and decoder that can be either enabled or disabled
• On-chip clock synthesizer provides the appropriate rate clock from a single 12.288 MHz Clock
• Provides low jitter output clock

TRANSMITTER:
• Compliant with Bellcore GR-499, GR-253 and ANSI T1.102 Specification for transmit pulse
• Tri-state Transmit output capability for redundancy applications
• Each Transmitter can be turned on or off
• Transmitters provide Current Output Drive

JITTER Attenuator:
• On chip advanced crystal-less Jitter Attenuator for each channel
• Jitter Attenuator can be selected in Receive or Transmit paths
• Meets ETSI TBR 24 Jitter Transfer Requirements
• Compliant with jitter transfer template outlined in ITU G.751, G.752, G.755 and GR-499-CORE,1995 standards
• 16 or 32 bits selectable FIFO size
• Jitter Attenuator can be disabled

CONTROL AND DIAGNOSTICS:
• 5 wire Serial Microprocessor Interface for control and configuration
• Supports optional internal Transmit driver monitoring
• Hardware Mode for control and configuration
• Each channel supports Local, Remote and Digital Loop-backs
• Single 3.3 V ± 5% power supply
• 5 V Tolerant digital inputs
• Available in 128 pin LQFP Package
• - 40°C to 85°C Industrial Temperature Range

APPLICATIONS
• E3/DS3 Access Equipment
• DSLAMs
• Digital Cross Connect Systems
• CSU/DSU Equipment
• Routers
• Fiber Optic Terminals

Номер в каталоге(s) : UM9552 UM9552S
Microsemi
Microsemi Corporation
Компоненты Описание : PIN Diode Attenuator

Description
The UM9552 is a very long minority carrier lifetime (70 ms typical) PIN Diode that has been developed for low HF or LF Band Attenuator Applications. They have been evaluated for Attenuator linearity and distortion characteristics in a Bridge Tee Attenuator Circuit at 455 KHz (the common intermediate frequency for AM transmitters and receivers). When the UM9552’s are used as the two variable resistors in the Bridged Tee Circuit, the Third Order Intermodulation Products are below -60 dBc with 0 dBm input power over an attenuation range of 4 dB to 30 dB.
These thicker, longer lifetime PIN Diodes exhibit a more linear forward biased resistance (RS) vs forward bias current (If) relationship, which greatly simplifies the design of the driver circuits that supply the bias currents over the specified attenuation range. This task is simplified if the low attenuation range is truncated and the few dB are compensated by commercially available, inexpensive 4 to 6 dB gain blocks.

Features
● Low Frequency Attenuator
● HF/LF Band Operation
● Long Lifetime (70 ms typ.)
● Very Low Distortion (IP3 @ 455 KHz = < 60 dBm)

Номер в каталоге(s) : RF2421 RF2421PCBA
RFMD
RF Micro Devices
Компоненты Описание : 10dB SWITCHED Attenuator

Product Description
The RF2421 is a monolithic switched Attenuator. The device is built using a Gallium Arsenide process technology and has a single step attenuation of 10dB. The input and output of the device has a low VSWR 50Ω match. The RF output can drive up to +16dBm. This unit is intended for use in systems that require RF power control by digital means. No negative supply voltages are required, and the current consumption is less than 5µA when the Attenuator is off.

Features
• Single 2.7V to 6V Supply
• 10dB Single Step Attenuation
• 1 dB Insertion Loss
• 1-bit Digitally Controlled Attenuation
• Digitally Controlled Power Down Mode
• 500MHz to 3000 MHz Operation

Typical Applications
• Power Control in Communication Systems
• CMOS Compatible Programmable Attenuator
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment

Номер в каталоге(s) : AT002S3-11
Alpha
Alpha Industries
Компоненты Описание : GaAs 35 dB IC Voltage Variable Single Control Attenuator 0.4–2.5 GHz

Description
The AT002S3-11 is a GaAs IC FET absorptive bridged “T” Attenuator.This Attenuator operates from 0.4–2.5 GHz and provides up to 35 dB of attenuation.The key feature of this Attenuator is the requirement of only one “positive” control voltage. Blocking capacitors are required on the RF ports.

Features
■ Single Positive Control Voltage
■ 35 dB Attenuation Range
■ 8 Lead Hermetic Surface Mount Package
■ Capable of Meeting MIL-STD Requirements5

Номер в каталоге(s) : AV850M2-A2
Alpha
Alpha Industries
Компоненты Описание : 18–40 GHz Surface Mount Voltage Variable Attenuator

Description
The AV850M2-A2 is a broadband millimeterwave voltage variable Attenuator in a rugged surface mount package that is compatible with high-volume solder installation.The Attenuator is designed for use in millimeterwave communication and sensor systems as a variable attenuation stage in the receiver or transmitter chain when wide dynamic range and high linearity are required. The robust ceramic surface mount package provides excellent electrical performance and a high degree of environmental protection for long-term reliability. All Attenuators are screened at the operating frequencies prior to shipment for guaranteed performance. Attenuator is targeted for high-volume millimeterwave applications such as point-to-point and point-to-multipoint wireless communications systems. Control voltage VC2 sets the attenuation level while VC1 adjusts return loss for the part.

Features
■ Surface Mount Package
■ 30 dB Attenuation Range
■ +10 dBm P1 dB All Attenuation States
■ Low Insertion Loss
■ 100% RF and DC Testing

Номер в каталоге(s) : TGL8784-SCC 8784 TGL8784-SCC TGL8784
TriQuint
TriQuint Semiconductor
Компоненты Описание : Analog Attenuator

2 - 20 GHz Analog Attenuator

Description
The TriQuint TGL8784-SCC is a monolithic variable Attenuator which operates from 2 to 20-GHz. This analog Attenuator can operate from a single +2.5 volt power supply if used with an external variable voltage divider circuit. Typical RF performance at 10-GHz is: Insertion Loss 2-dB, Maximum attenuation: 15-dB at 10-GHz, input and output return loss: better than 10-dB. DC blocking capacitors are provided on-chip.

Key Features and Performance
 • 2 to 20 GHz Frequency Range
 • 2-dB Insertion Loss at Midband
 • 10-dB Input/Output Return Loss
 • 13-dB Variable Attenuation Range
 • Single Polarity Power Supply Required
 • 1.702 x 1.219 x 0.152 mm (0.067 x 0.048 x 0.006 in.)

Номер в каталоге(s) : AA106-86
Alpha
Alpha Industries
Компоненты Описание : GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.5–2.0 GHz

Description
The AA106-86 is a 5 bit, single positive control GaAs IC FET digital Attenuator in a low cost MSOP-10 package.This Attenuator has an LSB of 0.5 dB and a total attenuation of 15.5 dB. The Attenuator requires external DC blocking capacitors, positive supply voltage (VS) and five individual bit control voltages (V1–V5). The AA106-86 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include cellular radio, wireless data, and wireless local loop gain level control circuits.

Features
■ Attenuation 0.5 dB Steps to 15.5 dB with High Accuracy
■ Single Positive Control (+3 to +5 V) for Each Bit
■ Low DC Power Consumption
■ Miniature Low Cost MSOP-10 Plastic Package

Номер в каталоге(s) : AA102-80
Alpha
Alpha Industries
Компоненты Описание : GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.5–2.5 GHz

Description
The AA102-80 is a 5 bit, single positive control GaAs IC FET digital Attenuator in a low cost SSOP-16 package. This Attenuator has an LSB of 0.5 dB and a total attenuation of 15.5 dB. The Attenuator requires external DC blocking capacitors, positive supply voltage (VS) and five individual bit control voltages (V1–V5). It is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include base station, wireless data, and wireless local loop gain level control circuits.

Features
■ Attenuation 0.5 dB Steps to 15.5 dB with High Accuracy
■ Single Positive Control (+3 to +5 V) for Each Bit
■ Low DC Power Consumption
■ Small Low Cost SSOP-16 Plastic Package

Номер в каталоге(s) : AA101-80
Alpha
Alpha Industries
Компоненты Описание : GaAs IC 5 bit digital Attenuator 1dB LSB positive control 0.5-2.5 GHz

Description
The AA101-80 is a 5 bit, single positive control GaAs IC FET digital Attenuator in a low cost SSOP-16 package. This Attenuator has an LSB of 1 dB and a total attenuation of 31 dB. The Attenuator requires external DC blocking capacitors, positive supply voltage (VS) and five individual bit control voltages (V1–V5).The AA101-80 is particularly suited where high attenuation accuracy, low insertion loss and low intermodulation products are required. Typical applications include base station, wireless data, and wireless local loop gain level control circuits.

Features
■ Attenuation 1 dB Steps to 31 dB with High Accuracy
■ Single Positive Control (+3 to +5 V) for Each Bit
■ Low DC Power Consumption
■ Small Low Cost SSOP-16 Plastic Package

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