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Part Name(s) : MH88500
Mitel
Mitel Networks
Description : Hybrid Subscriber Line Interface Circuit (SLIC)

Description
The Mitel MH88500 Subscriber Line Interface Circuit provides a complete Interface between the telephone Line and a speech switch requiring only single bidirectional switch per crosspoint. The functions provided by the MH88500 include bidirectional differential to single ended conversion in the speech path, Line battery feed, ringing feed and loop and dial pulse detection. The device is fabricated as a thick film Hybrid in a 20-pin ‘single-in-Line’ package allowing optimum Circuit board packing density.

Features
• Differential to single ended conversion
• No transformers required
• Minimum installation space
• Off-Hook detection and LED indicator drive
• Relay drive output
• Battery and ringing feed to Line
• Logic Interface: MUTE, OFHK, RC
• Mute of incoming audio
• Dial pulse detection
• Voltage surge protection

Applications
Line Interface for:
• PABX
• Intercoms
• Key Systems

Part Name(s) : MH88500IN
Mitel
Mitel Networks
Description : Hybrid Subscriber Line Interface Circuit (SLIC)

Description
The Mitel MH88500IN Subscriber Line Interface Circuit provides a complete Interface between the telephone Line and a speech switch requiring only single bidirectional switch per crosspoint. The functions provided by the MH88500IN include bidirectional differential to single ended conversion in the speech path, Line battery feed, ringing feed and loop and dial pulse detection. The device is fabricated as a thick film Hybrid in a 20-pin ‘single-inLine’ package allowing optimum Circuit board packing density.

Features
• Differential to single ended conversion
• No transformers required
• Minimum installation space
• Off-Hook detection and LED indicator drive
• Relay drive output
• Battery and ringing feed to Line
• Logic Interface: MUTE, OFHK, RC
• Mute of incoming audio
• Dial pulse detection
• Voltage surge protection

Applications
Line Interface for:
• PABX
• Intercoms
• Key Systems

Part Name(s) : MH88500
ZARLINK
Zarlink Semiconductor Inc
Description : Hybrid Subscriber Line Interface Circuit (SLIC)

Description
The Zarlink MH88500 Subscriber Line Interface Circuit provides a complete Interface between the telephone Line and a speech switch requiring only single bidirectional switch per crosspoint. The functions provided by the MH88500 include bidirectional differential to single ended conversion in the speech path, Line battery feed, ringing feed and loop and dial pulse detection. The device is fabricated as a thick film Hybrid in a 20-pin ‘single-inLine’ package allowing optimum Circuit board packing density.

Features
• Differential to single ended conversion
• No transformers required
• Minimum installation space
• Off-Hook detection and LED indicator drive
• Relay drive output
• Battery and ringing feed to Line
• Logic Interface: MUTE, OFHK, RC
• Mute of incoming audio
• Dial pulse detection
• Voltage surge protection

Applications
Line Interface for:
• PABX
• Intercoms
• Key Systems

Part Name(s) : MH88500IN
ZARLINK
Zarlink Semiconductor Inc
Description : Hybrid Subscriber Line Interface Circuit (SLIC)

Description
The Zarlink MH88500IN Subscriber Line Interface Circuit provides a complete Interface between the telephone Line and a speech switch requiring only single bidirectional switch per crosspoint. The functions provided by the MH88500IN include bidirectional differential to single ended conversion in the speech path, Line battery feed, ringing feed and loop and dial pulse detection. The device is fabricated as a thick film Hybrid in a 20-pin ‘single-inLine’ package allowing optimum Circuit board packing density.

Features
• Differential to single ended conversion
• No transformers required
• Minimum installation space
• Off-Hook detection and LED indicator drive
• Relay drive output
• Battery and ringing feed to Line
• Logic Interface: MUTE, OFHK, RC
• Mute of incoming audio
• Dial pulse detection
• Voltage surge protection

Applications
Line Interface for:
• PABX
• Intercoms
• Key Systems

Part Name(s) : MH88612
Mitel
Mitel Networks
Description : Subscriber Line Interface Circuit (SLIC)

Description
The SLIC provides a complete Interface between a switching system and a Subscriber loop. Functions provided include battery feed and ringing feed to the Subscriber Line, 2-Wire to 4-Wire Hybrid interfacing, constant current feed and dial pulse detection. The device is fabricated using thick film Hybrid technology in a 20-pin single in-Line package.

Features
• Transformerless 2-wire to 4-wire conversion
• Battery and ringing feed to Line
• Off-hook and dial pulse detection
• Ring ground over-current protection
• Adjustable constant current feed
• Relay drive output
• Power VBat Denial
• Wide operating range

Applications
Line Interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems

Part Name(s) : MH88612B MH88612BV-2
ZARLINK
Zarlink Semiconductor Inc
Description : Subscriber Line Interface Circuit (SLIC)

Description
The SLIC provides a complete Interface between a switching system and a Subscriber loop. Functions provided include battery feed and ringing feed to the Subscriber Line, 2-Wire to 4-Wire Hybrid interfacing, constant current feed and dial pulse detection. The device is fabricated using thick film Hybrid technology in a 20-pin single in-Line package.

Features
• Transformerless 2-wire to 4-wire conversion
• Battery and ringing feed to Line
• Off-hook and dial pulse detection.
• Ring ground over-current protection
• Adjustable constant current feed.
• Relay driver
• Power Denial
• Wide Operating Range

Applications
Line Interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems

Part Name(s) : MH88610
Mitel
Mitel Networks
Description : Subscriber Line Interface Circuit (SLIC)

Description
The Mitel MH88610 Subscriber Line Interface Circuit provides a complete Interface between a switching system and a Subscriber loop. Functions provided include battery feed and ringing feed to the Subscriber Line, 2-Wire to 4-Wire Hybrid interfacing, constant current, loop length and dial pulse detection. The device is fabricated using thick film Hybrid technology in a 20-pin single in-Line package.

Features
• Transformerless 2-wire to 4-wire conversion
• Battery and ringing feed to Line
• Off-hook and dial pulse detection
• Ring ground over-current protection
• Loop length detection
• Constant current feed

Applications
Line Interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems

Intersil
Intersil
Description : SLIC Subscriber Line Interface Circuit

Description
The HC4P5509A1R3060 telephone Subscriber Line Interface Circuit integrates most of the BORSCHT functions on a monolithic IC. The device is manufactured in a Dielectric Isolation (DI) process and is designed for use as a high voltage Interface between the traditional telephone Subscriber pair (Tip and Ring) and the low voltage filtering and coding/decoding functions of the Line card. Together with a secondary protection diode bridge and “feed” resistors, the device will withstand 1000V lightning induced surges, in plastic packages. The SLIC also maintains specified transmission performance in the presence of externally induced longitudinal currents. The BORSCHT functions that the SLIC provides are:
    • Battery Feed with Subscriber Loop Current Limiting
    • Overvoltage Protection
    • Ring Relay Driver
    • Supervisory Signaling Functions
    • Hybrid Functions (with External Op Amp)
    • Test (or Battery Reversal) Relay Driver

Features
• DI Monolithic High Voltage Process
• Compatible with Worldwide PBX and CO Performance Requirements
• Controlled Supply of Battery Feed Current with Programmable Current Limit
• Operates with 5V Positive Supply (VB+)
• Internal Ring Relay Driver and a Utility Relay Driver
• High Impedance Mode for Subscriber Loop
• High Temperature Alarm Output
• Low Power Consumption During Standby Functions
• Switch Hook, Ground Key, and Ring Trip Detection
• Selective Power Denial to Subscriber
• Voice Path Active During Power Denial
• On Chip Op Amp for 2-Wire Impedance Matching

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Applications
• Solid State Line Interface Circuit for PBX or Central Office Systems, Digital Loop Carrier Systems
• Hotel/Motel Switching Systems
• Direct Inward Dialing (DID) Trunks
• Voice Messaging PBXs
• High Voltage 2-Wire/4-Wire, 4-Wire/2-Wire Hybrid
• Related Literature
    - AN9607, Impedance Matching Design Equations
    - AN9628, AC Voltage Gain
    - AN9608, Implementing Pulse Metering
    - AN549, The HC-5502S/4X Telephone Subscriber Line Interface Circuits (SLIC)

Mitel
Mitel Networks
Description : Subscriber Line Interface Circuit (SLIC)

Description
The SLIC provides a complete Interface between a switching system and a Subscriber loop. Functions provided include battery feed and ringing feed to the Subscriber Line, 2-Wire to 4-Wire Hybrid interfacing, constant current feed with constant voltage foldback, and dial pulse detection. The device is fabricated using thick film Hybrid technology in a 20-pin single in-Line package.

Features
• Transformerless 2-wire to 4-wire conversion
• Battery and ringing feed to Line.
• Off-hook and dial pulse detection.
• Ring ground over-current protection.
• Constant current feed with constant voltage foldover.
• Relay driver.
• Power Denial.
• Wide Operating Range.
• Pin for pin compatible 600R and 900R variants.

Applications
Line Interface for:
 • PABX
 • Intercoms
 • Key Telephone Systems
 • Control Systems
 

 

Description : SLIC Subscriber Line Interface Circuit

The Intersil SLIC incorporates many of the BORSHT function on a single IC chip. This includes DC battery feed, a ring relay driver, supervisory and Hybrid functions. This device is designed to maintain transmission performance in the presence of externally induced longitudinal currents. Using the unique Intersil dielectric isolation process, the SLIC can operate directly with a wide range of station battery voltages.

Features
• Low Cost Version of HC-5502B
• Capable of 12V or 5V (VB+) Operation
• Monolithic Integrated Device
• DI High Voltage Process
• Compatible With Worldwide PBX Performance Requirements
• Controlled Supply of Battery Feed Current for Short Loops (30mA)
• Internal Ring Relay Driver
• Low Power Consumption During Standby
• Switch Hook, Ground Key and Ring Trip Detection Functions
• Selective Denial of Power to Subscriber Loops

Applications
• Solid State Line Interface Circuit for Analog and Digital PBX Systems
• Direct Inward Dial (DID) Trunks
• Voice Messaging PBXs
• Related Literature
    - AN549, The HC-5502S/4X Telephone Subscriber Line Interface Circuits (SLIC)
    - AN571, Using Ring Sync with HC-5502A and HC-5504 SLICs

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