le79r241 Zarlink Semiconductor, le79r241 Datasheet

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le79r241

Manufacturer Part Number
le79r241
Description
Intelligent Subscriber Line Interface Circuit
Manufacturer
Zarlink Semiconductor
Datasheet

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APPLICATIONS
FEATURES
A
NOTE: On August 3, 2007, Zarlink Semiconductor acquired the products and
technology of Legerity Holdings.
Enables a cost effective voice solution for long or short
loop applications providing POTS and integrated test
capabilities
— CO
— DLC
— PBX/KTS
— Pair gain
Monitor of two-wire interface voltages and currents
supports
— Voice transmission
— Internal chip ring generation
— Programmable DC feed characteristics
— Selectable off-hook and ground-key thresholds
— Subscriber line diagnostics
— Power cross and fault detection
Supports internal short loop or external ringing
+5 V and battery supplies
Dual battery operation for system power saving
— Automatic battery switching
— Intelligent thermal management
Compatible with inexpensive protection networks
— Accommodates low tolerance fuse resistors or PTC
Metering capable
— 12 kHz and 16 kHz
— Smooth polarity reversal
Tip-open state supports ground start signaling
Integrated test load switches/relay drivers
5 REN with DC offset trapezoid.
— For US standard:
— drives ring up to 4.4 kft of 26 gauge wire.
— drives ring up to 7 kft of 24 gauge wire.
— For European (British) standard:
— drives ring up to 1.7 km of 0.5 mm copper cable.
Space Saving Package Options (8x8 QFN)
thermistors
– Independent of battery
– Current limited
Leakage resistance
Loop resistance
Line capacitance
Bell capacitance
Foreign voltage sensing
Voice Solution
Intelligent Subscriber Line Interface Circuit
ORDERING INFORMATION
1.
2.
3.
DESCRIPTION
The Le79R241 Intelligent Subscriber Line Interface Circuit
(ISLIC™) device, in combination with a VE790 series ISLAC™
device, implements the telephone line interface function. This
enables the design of a low cost, high performance, fully
software programmable line interface for multiple country
applications worldwide. All AC, DC, and signaling parameters
are fully programmable via microprocessor or GCI interfaces
on the VE790 series ISLAC device. Additionally, the Le79R241
ISLIC device has integrated self-test and line-test capabilities
to resolve faults to the line or line circuit. The integrated test
capability is crucial for remote applications where dedicated
test hardware is not cost effective.
RELATED LITERATURE
A VE790 series ISLAC™ device must be used with this part.
Le79R241JC
Le79R241DJC
Le79R241QC
Le79R241FQC
080248 Le79231 ISLIC™ Device Data Sheet
080253 Le79R251 ISLIC™ Device Data Sheet
080250 Le79Q224x Quad ISLAC™ Device Data Sheet
081065 Le79228 Quad ISLAC™ Device Data Sheet
080262 VE790 Series Evaluation Board User’s Guide
080804 Le79R2xx/Le79Q224x Chip Set User’s Guide
080923 Le79R2xx/Le79228 Chip Set User’s Guide
081103 Le79610 PacketSLAC™ Device Data Sheet
Due to size constraints, QFN devices are marked by omitting the
“Le” prefix and the performance grade dash character. For
example, Le79R241QC is marked 79R241QC.
The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of
electrical equipment.
For delivery using a tape and reel packing system, add a "T" suffix
to the OPN (Ordering Part Number) when placing an order.
Device
32-pin PLCC
32-pin PLCC (Green)
32-pin QFN
32-pin QFN (Green)
Package Type
Document ID# 080249
Rev:
Distribution:
1, 2
Le79R241
O
Public Document
VE790 Series
Tube
Tray
Date:
Version: 2
Packing
Sep 19, 2007
3

Related parts for le79r241

le79r241 Summary of contents

Page 1

... All AC, DC, and signaling parameters are fully programmable via microprocessor or GCI interfaces on the VE790 series ISLAC device. Additionally, the Le79R241 ISLIC device has integrated self-test and line-test capabilities to resolve faults to the line or line circuit. The integrated test capability is crucial for remote applications where dedicated test hardware is not cost effective ...

Page 2

... TABLE OF CONTENTS Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Ordering Information Description Related Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Le79R241 ISLIC™ Device Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Features of the VE790 series Chip set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Chip set Block Diagram - Four Channel Line card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Thermal Resistance ...

Page 3

... This enables it to have full control over the subscriber loop. The Le79R241 ISLIC device is designed to be used exclusively with the VE790 series ISLAC devices. The Le79R241 ISLIC device requires only +5 V power and the battery supplies for its operation. ...

Page 4

... Le79R241 ISLIC device functions with programmable parameters. System-level parameters under programmable control include active loop current limits, feed resistance, and feed mode voltages. The VE790 series ISLAC devices supply complete mode control to the Le79R241 ISLIC device using the control bus (P1-P3) and tri-level load signal (LD ) ...

Page 5

... LE79R241 ISLIC™ DEVICE INTERNAL BLOCK DIAGRAM IA sense 600 SA Fault Meas. HPA TMS BGND HPB Fault Meas sense BD IB 600 TMN Thermal Management Control TMP VBH High Neg. Bat. sel. VBL R3 RYE R2 R1 Power amplifiers positive supply BGND A Amplifier ...

Page 6

... Line and ringer capacitance – Loop resistance • Integrated self-test features – Echo gain, distortion, and noise • Guaranteed performance over commercial and industrial temperature ranges. • three relay drivers per Le79R241 ISLIC device – Configurable as test load switches 6 Zarlink Semiconductor Inc. ...

Page 7

... CHIP SET BLOCK DIAGRAM - FOUR CHANNEL LINE CARD Networks and A3 Protection Le79R241 7 Le79R241 AGND1 AGND2 7 Le79R241 3 7 Le79R241 BATH BATL 7 Zarlink Semiconductor Inc. 4 VCCA LD1 VCCD DGND1 VREF DGND2 4 IO(1-4) LD2 TSCA/G TSCB DRA/DD LD3 DRB Le79Q224x P1-P3 DXB ...

Page 8

... Figure 2. Le79R241DJC RYE TMS 9 32-Pin PLCC TMP 10 TMN Figure 3. Le79R241FQC RYE 32-Pin QFN TMS 5 TMP 6 TMN Exposed Pad Zarlink Semiconductor Inc. ...

Page 9

... VBH. Positive supply for low voltage analog and digital circuits in the Le79R241 ISLIC device. Sets the DC longitudinal voltage of the Le79R241 ISLIC device the reference for the longitudinal control loop. When the VLB pin is greater than VREF, the Le79R241 ISLIC device sets the longitudinal voltage to a voltage approximately half-way between the positive and negative power supply battery rails ...

Page 10

... Rise time of VBH (dv/dt) must be limited to less than 27 v/ms. Thermal Resistance The junction to air thermal resistance of the Le79R241 ISLIC device in a 32-pin PLCC package is 45° C/W and in a 32-pin QFN package is 25° C/W (measured under free air convection conditions and without external heat sinking). ...

Page 11

... Test Conditions On-Hook Disconnect On-Hook Standby On-Hook TransmissionLe79R241 ISLIC device Fixed Longitudinal Voltage On-Hook Active High Battery Le79R241 ISLIC device Off-Hook Active Low Battery Le79R241 ISLIC device RL = 294 Ω On-Hook Disconnect On-Hook Standby On-Hook Transmission ...

Page 12

... BATL = –36 V, RRX = 150 kΩ 600 Ω, RSA = RSB = 200 kΩ, RFA = RFB = 50 Ω, CHP = 22 nF, CAD = CBD = 22 nF, IRSN = 50 µA, Active low battery. DC-feed conditions are normally set by the 790 series codec. When the Le79R241 ISLIC device is tested by itself, its operating conditions must be simulated were connected to an ideal 790 series codec. ...

Page 13

... R2,R3 Off Leakage Zener Break Over Zener On Voltage R2 Condition Min 25 mA/relay sink 40 mA/relay sink R2,R3 = BGND RYE = VBH Iz = 100 µA 6 Figure 4. Relay Drivers RYE A. Relay Driver Configuration R1 BGND B. Ring Relay 13 Zarlink Semiconductor Inc. Typ Max Unit Note 0.4 0 0.8 1.0 0 100 µA 7 ...

Page 14

... 3400 kHz 50 to 3400 kHz Active mode 20 Freq = 12 kHz 2.8 Vrms Freq = 16 kHz 40 metering load = 200 Ω 14 Zarlink Semiconductor Inc. Typ Max Unit Note 1 2. Ω Ω 70 135 –13.98 –13.83 – ...

Page 15

... The Le79R241 ISLIC device receives multiplexed control data on the P1, P2 and P3 pins. The LD pin then controls the loading of P1, P2, and P3 values into the proper bits in the Le79R241 ISLIC device control register. When the LD pin is less than 0.3 V below VREF (< (VREF – 0.3 V)), P1–P3 must contain data for relay control bits RD1, RD2 and RD3. These are latched into the first three bits in the Le79R241 ISLIC device control register. When the LD pin is more than 0.3 V above VREF, P1– ...

Page 16

... This mode disconnects both A and B output amplifiers from the AD and BD outputs. The A and B amplifiers are shut down and the Le79R241 ISLIC device selects the low battery voltage at the VBL pin. In the Disconnect state, the currents on IMT and ILG represent the voltages on the SA and SB pins, respectively. These currents ...

Page 17

... After a power-on reset or hardware reset, the relay outputs from the Le79R241 ISLIC device turn all relays off. An unassuming state is to place the relay control pins, which are level triggered reset state for all relays. Any noise encountered only raises the levels toward the register lock state ...

Page 18

... Relay Data P1,P2,P3 VREF LD VREF t P1,P2,P3 187.5 µ State Data Relay Data DETAIL A tr SLD t SLDPW SDXSU t SDXD 18 Zarlink Semiconductor Inc. S Write State Register Lock Registers Write Relay Register New State Data Write State Register tf SLD Write Relay Register t SDXHD Relay driver response R ...

Page 19

... DLHi BATL CBATLi CBATPi BATP Figure 5. Internal Ringing Line Schematic +5V 3.3V VCC CREF RRXi SA RSN AD CHLbi RHLci RTi CADi VSAB CHPi HPA VTX HPB U1 Le79R241 or Le79R251 BD VLB IMT SB CBDi TMS RMTi VREF ILG TMP RLGi TMN VREF VREF VBH VBL LD GND ...

Page 20

... LINE CARD PARTS LIST- INTERNAL RINGING The following list defines the parts and part values required to meet target specification limits for channel i of the line card (i = 1,2,3,4). Item Le79R241 ISLIC U1 device VE790 series ISLAC U2 device U3, U4, U5, U6 B1100CC DT1 , DT2 Diode ...

Page 21

... CBATLi RGFDi KRi +5 V Ring Bus +5 V 3.3 V VCC CREF RRXi SA RSN RHLai CHLbi AD CADi RHLci VREF RTi VSAB CHPi HPA VTX U1 Le79231, Le79R241 HPB or Le79R251 VLB CBDi BD IMT RMTi SB TMS VREF ILG RLGi TMP VREF TMN VREF LD VBH GND P1 VBL P2 P3 ...

Page 22

... LINE CARD PARTS LIST - EXTERNAL RINGING The following list defines the parts and part values required to meet target specification limits for channel i of the line card ( 4). Item U1 Le79R241 ISLIC device VE790 series ISLAC U2 device U5 TISP61089 1 2 DLH , DT1 ...

Page 23

... Exact shape of this feature is optional. 0.550 0.553 0.255 REF 5 Details of pin 1 identifier are optional but must be located -- 10 deg within the zone indicated. 6 Sum of DAM bar protrusions to be 0.007 max per lead. 7 Controlling dimension : Inch. 8 Reference document : JEDEC MS-016 32-Pin PLCC 23 Zarlink Semiconductor Inc. ...

Page 24

... The Terminal #1 identifier may be either a mold or marked feature. 5.90 5. Coplanarity applies to the exposed pad as well as the terminals. 6. Reference Document: JEDEC MO-220. 0.63 7. Lead width deviates from the JEDEC MO-220 standard. 0.05 32-Pin QFN 24 Zarlink Semiconductor Inc degrees. ...

Page 25

... Added QFN package data to “Connection Diagram,” “Absolute Maximum Ratings,” and “Physical Dimensions.” • Updated "Am" OPNs (Ordering Part Numbers) to "Le" throughout document • In "Ordering Information" the following changes were made: – Added entries for Le79R241JC and Le79R241QC – Removed the chip graphic – Added notes • ...

Page 26

... Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007 > 5 mA, deleted the last sentence in the Description section L Application Circuits, on page 19 Ordering Information, on page and I /I LOOP MT LONG LG Physical Dimensions, on page 23 26 Zarlink Semiconductor Inc. for min. typ and max. ...

Page 27

... I C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo are trademarks, and Legerity, the Legerity logo and combinations thereof are registered trademarks of Zarlink Semiconductor Inc. All other trademarks and registered trademarks are the property of their respective owners. © 2007 Zarlink Semiconductor Inc. All Rights Reserved. ...

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