le79555 Zarlink Semiconductor, le79555 Datasheet - Page 22

• Manufacturer Part Number: le79555
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

REVISION HISTORY
Revision A to B
•
•
•
•
•
•
•
•
•
•
•
•
•
Revision B to C
•
•
•
•
•
•
•
•
•
•
Updated document format.
In the "Features" section, the following changes were made:
–
–
–
In "Related Literature", added the "Introduction to the SLIC Family" application note.
Added the 32-pin PLCC information to the Ordering Information and Absolute Maximum Ratings sections and added the
connection diagram.
Updated the Connection Diagram.
Updated the Pin Description table to correct inconsistencies; added range for CHCLK.
In the Electrical Characteristics table:
–
–
In "Specifications", the following changes were made:
–
–
–
–
–
–
–
In the "DC Feed Characteristics" section, revised equations in notes and updated DC Feed Characteristics graphic.
Changed the equation for Z
Updated Engineering Test Circuit and Application Circuit graphics; added graphic for U4/Am79Q063
Added Linecard Parts List page
The physical dimension (PQT044) was added to the Physical Dimension section.
Removed current gain feature from the "Features" section
Updated "Related Literature" section to include the QLSLAC data sheets
In the "Ordering Information" table, added dashes before performance grades
Removed package graphic from "Ordering Information" section
Added OPNs for the QFN package in "Ordering Information"; added note regarding markings on QFN packages
Edited "Block Descriptions" section
In "Connection Diagrams," added pinout diagram for 32-pin QFN package; added notes regarding exposed pad and RSVD
pin
In the "Pin Descriptions" table, the following edits were made:
–
–
–
–
–
–
In "Electrical Characteristics", "Absolute Maximum Ratings" table, the following was added:
–
–
Added a note regarding maximum power dissipation values under the Absolute Maximum Ratings table
Removed "(45 mW)" from Low standby power (since it’s already in the specification).
Changed battery voltage range from −16 V to −58 V to −40 V to −58 V.
Removed "(6.5 V)" from Low Off-Hook Active Overhead Voltage.
Updated the information in the Line Characteristics section on the Long Loops row and the VDC Accuracy row.
Deleted the Disconnect state information in the Power Dissipation and Supply Currents sections.
Added a column for performance grade in the Longitudinal Capability and Insertion Loss and Balance Return Signal
tables.
Changed test circuit reference in the Longitudinal Capability table
Updated the Insertion Loss and Balance Return Signal table.
In the Line Characteristics table, I
In the Line Characteristics table, added spec for Overhead Voltage.
Made changes to test conditions for I
the Line Characteristics table.
Added value for CHCLK in Note 1.
Updated the Pin Description table to correct inconsistencies
Edited the description of the RSN pin
Added range for CHCLK
Made minor edits to RSVD description
Added a sentence to the description for VDC
Added a row to describe the exposed pad
Max power dissipation of 3.0 W for 32-pin QFN package
Thermal data for 32-pin QFN package
RX
in the User-Programmable table
L
Standby state test conditions, changed the equation to R
L
, Long Loops, Active State; KDC (V
Zarlink Semiconductor Inc.
22
DC
Accuracy); VAB, Open Circuit voltage in
L
= 2.5 k.