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Agere Systems

L9310 Datasheet Preview

L9310 Datasheet

Line Interface and Line Access Circuit Full-Feature SLIC/Ringing Relay and Test Access Device

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Data Sheet
July 2001
L9310 Line Interface and Line Access Circuit
Full-Feature SLIC, Ringing Relay, and Test Access Device
Introduction
The Agere Systems Inc. L9310 is a combination full-
feature, ultralow-power SLIC, solid-state ringing
access relay, and line test matrix. It is part of a pin-
for-pin compatible family of devices designed to
serve a wide variety of applications. The L9310 is
optimized for European Access applications and
North American access where per-line testing and
GR-909 longitudinal balance are required.
Features
SLIC
s 5 V and battery operation
s Optional automatic battery switch
s 15 operational and test modes
s Appropriate for 46 dB longitudinal balance applica-
tions
s Minimal external components required at all inter-
faces
s Ultralow power dissipation
s Software/hardware adjustable dc parameters and
supervision thresholds
s Meter pulse compatible
s Ground start/ground key compatible
Solid-State Ring Relay
s Low impulse noise
s Current-limited switches/thermal protection
Line Test Matrix
s Single-ended or differential measurements
s Current or voltage sense
s ac or dc measurements
s Dedicated analog input and output
Applications
s Pair Gain
s Digital Loop Carrier (DLC)
s Central Office (CO)
s Fiber-in-the-Loop (FITL)
Description
The L9310 electronic line interface and line access
circuit (LILAC) provides all the functions that are nec-
essary to interface a codec to the tip and ring of a
subscriber loop, integrating the battery feed and ring-
ing access relay and line test access in one low-
power, low-cost package.
The L9310 requires a 5 V and battery supply to oper-
ate. Included is an automatic battery switch. The bat-
tery feed offers forward and reverse battery, on-hook
transmission, ground start, ground key, and meter
pulse operational modes. It also has a low-power
scan and a disconnect mode.
In all operating states, this IC is designed for minimal
power dissipation. This device is designed to mini-
mize the number of external components required at
all interfaces.
The dc template, current limit, and overhead voltage
and loop supervision threshold are programmable via
an applied voltage source. The voltage source may
be an external programmable voltage source or
derived from the VREF SLIC output.
The integrated solid-state switch offers power ringing
access. Impulse noise is minimized, thus eliminating
the need for external zero-cross switching circuitry.
The L9310 provides line test capability. The differen-
tial or single-ended ac and dc line voltage or current
may be measured by the L9310.




Agere Systems

L9310 Datasheet Preview

L9310 Datasheet

Line Interface and Line Access Circuit Full-Feature SLIC/Ringing Relay and Test Access Device

No Preview Available !

L9310 Line Interface and Line Access Circuit
Full-Feature SLIC, Ringing Relay, and Test Access Device
Data Sheet
July 2001
Table of Contents
Contents
Page Contents
Page
Introduction ..................................................................1
Features ....................................................................1
SLIC .......................................................................1
Solid-State Ring Relay ...........................................1
Line Test Marix.......................................................1
Applications...............................................................1
Description ................................................................1
Features ......................................................................4
Description...................................................................4
Architecture .................................................................9
Pin Information ..........................................................10
Operating States........................................................14
Input State Coding ..................................................14
State Definitions ........................................................16
Primary Control Modes ...........................................16
Powerup, Forward Battery....................................16
Powerup, Reverse Battery ...................................16
Scan .....................................................................16
Ground Start.........................................................16
Ringing .................................................................17
Disconnect—Break Before Make .........................17
Tip Amp ................................................................17
Ring Amp .............................................................17
Tip and Ring Amp.................................................17
Reset ....................................................................17
Secondary Control Mode States .............................17
Voltage: Tip to Ground .........................................17
Voltage: Ring to Ground.......................................17
Voltage: Tip to Ring..............................................17
Current: Tip to Ring—VTX ...................................18
Current: Tip to Ring—VITR ..................................18
Reference Voltage ...............................................18
PPM On................................................................18
PPM Off/TEST Off................................................18
Special States .........................................................18
Thermal Shutdown ...............................................18
Battery Out of Range ...........................................19
Absolute Maximum Ratings ......................................19
Electrical Characteristics ...........................................20
Ring Trip Detector ...................................................21
PPM ........................................................................21
Test ........................................................................22
SLIC Two-Wire Port ................................................23
Analog Pin Characteristics ......................................25
ac Feed Characteristics ..........................................26
Logic Inputs and Outputs, VDD = 5.0 V ...................27
Timing Requirements ..............................................27
Switch Characteristics.............................................28
On-State Switch I-V Characteristics........................29
Test Configurations ...................................................30
Applications ...............................................................32
dc Characteristics ...................................................32
Power Control.......................................................32
Power Derating.....................................................32
Automatic Battery Switch .....................................33
Power Control Resistor ....................................... 34
dc Loop Current Limit .......................................... 34
Overhead Voltage ............................................... 35
Loop Range......................................................... 36
Battery Feed ........................................................ 36
Battery Reversal Rate ......................................... 37
Longitudinal to Metallic Balance.......................... 37
Supervision ............................................................... 37
Loop Closure.......................................................... 37
Ring Trip ............................................................... 38
Tip or Ring Ground Detector.................................. 38
Switching Behavior................................................. 38
Make-Before-Break Operation ............................... 38
Break-Before-Make Operation ............................... 39
Protection ................................................................. 39
External Protection................................................. 39
Active Mode Response at PT/PR........................... 40
Ring Mode Response at PT/PR ............................. 41
Internal Tertiary Protection..................................... 41
Diode Bridge........................................................ 41
Battery Out of Range Detector: High
(Magnitude) ................................................. 41
Battery Out of Range Detector: Low
(Magnitude) ................................................. 41
Special Functions ..................................................... 42
Periodic Pulse Metering (PPM) .............................. 42
Line Test ................................................................ 42
ac Applications ......................................................... 44
ac Parameters........................................................ 44
Codec Types .......................................................... 44
ac Interface Network .............................................. 44
Design Tools .......................................................... 45
First-Generation Codec ac Interface Network........ 45
First-Generation Codec ac Interface
Network: Resistive Termination ................... 46
Example 1, Real Termination .............................. 47
Hybrid Balance....................................................... 47
First-Generation Codec ac Interface
Network: Complex Termination ................... 50
Complex Termination Impedance Design .......... 50
ac Interface Using First-Generation Codec ......... 50
Set ZTG—Gain Shaping ....................................... 50
Transmit Gain ...................................................... 51
Receive Gain....................................................... 52
Hybrid Balance .................................................... 52
Blocking Capacitors............................................. 53
Basic Loop Start Application Using T7504
Type Codec ................................................. 54
Third-Generation Codec ac Interface
Network: Complex Termination ................... 57
Outline Diagram........................................................ 59
44-Pin PLCC .......................................................... 59
Ordering Information................................................. 60
2 Agere Systems Inc.


Part Number L9310
Description Line Interface and Line Access Circuit Full-Feature SLIC/Ringing Relay and Test Access Device
Maker Agere Systems
Total Page 30 Pages
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