le79231 Zarlink Semiconductor, le79231 Datasheet
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le79231
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le79231 Summary of contents
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... NOTE: On August 3, 2007, Zarlink Semiconductor acquired the products and technology of Legerity Holdings. Intelligent Subscriber Line Interface Circuit DESCRIPTION The Le79231 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 ...
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... Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Ordering Information Description Related Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Le79231 ISLIC Device Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Features of the VE790 Series Chip set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Chip set Block Diagram - Four Channel Line Card Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Thermal Resistance ...
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... This enables it to have full control over the subscriber loop. The Le79231 ISLIC device is designed to be used exclusively with the VE790 series ISLAC devices. The Le79231 ISLIC device requires only +5 V power and the battery supplies for its operation. ...
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... Le79231 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 Le79231 ISLIC device using the control bus (P1-P3) and tri-level load signal (LD ) ...
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... LE79231 ISLIC DEVICE INTERNAL BLOCK DIAGRAM IA sense AD IA 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 ...
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... 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 Le79231 ISLIC device – Configurable as test load switches 6 Zarlink Semiconductor Inc. ...
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... CHIP SET BLOCK DIAGRAM - FOUR CHANNEL LINE CARD EXAMPLE Networks and A3 Protection Le79231 7 Le79231 AGND1 AGND2 7 Le79231 3 7 Le79231 R REF R SHB BATH R BATL 7 Zarlink Semiconductor Inc. 4 VCCA LD1 VCCD DGND1 VREF DGND2 4 IO(1-4) LD2 TSCA/G TSCB DRA/DD LD3 ...
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... Figure 1. Le79231JC RYE TMS 9 32-Pin PLCC TMP 10 TMN Figure 2. Le79231QC RYE 32-Pin QFN TMS 5 TMP 6 TMN Exposed Pad Zarlink Semiconductor Inc. ...
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... Connection to low-battery supply used for short loops. When only a single battery is available, this pin can be connected to VBH Power Supply supply for low voltage analog and digital circuits in the Le79231 ISLIC device. Sets the DC longitudinal voltage of the Le79231 ISLIC device the reference for the longitudinal control loop ...
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... Rise time of VBH (dv/dt) must be limited to less than 27 v/µs. Thermal Resistance The junction to air thermal resistance of the Le79231 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). ...
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... REF Test Conditions On-Hook Disconnect On-Hook Standby On-Hook Transmission Le79231 ISLIC device Fixed Longitudinal Voltage On-Hook Active High Battery Le79231 ISLIC device Off-Hook Active Low Battery Le79231 ISLIC device RL = 294 Ω ...
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... 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 mA. DC-feed conditions are normally set by the VE790 series codec. When the Le79231 ISLIC device is tested by itself, its operating conditions must be simulated were connected to an ideal codec. ...
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... 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 3. 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 ...
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... 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 2 – ...
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... This spec is valid from VBL or –50 V, whichever is lower in magnitude. OPERATING MODES The Le79231 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 Le79231 ISLIC device control register. When the LD pin is less than 0.3 V below V (< (V – ...
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... 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 Le79231 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 ...
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... After a power-on reset or hardware reset, the relay outputs from the Le79231 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 ...
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... Le79231 ISLIC device registers are refreshed at 5.33 kHz when used with a Le79Q224x or Le79228 codec the clock or MPI becomes disabled, the LD pins and P1 connection. 6. Not tested in production. Guaranteed by characterization. WAVEFORMS LD P1,P2, VCC VREF LD 0V Previous Relay Data P1,P2,P3 VREF LD VREF t P1,P2,P3 – 3 returns state, thus protecting the Le79231 ISLIC device and the line 187.5 µ ...
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... CBATHi BATL CBATLi RTESTLi RGFD i KRi +5 V Ring Bus +5 V 3.3 V VCC CREF SA RSN 8 CHLbi AD CADi RHLci RTi VSAB CHPi HPA VTX U1 Le79231, Le79R241 HPB or Le79R251 VLB CBDi 5 BD IMT RMTi SB TMS VREF ILG RLGi TMP VREF TMN VREF LD VBH GND P1 VBL P2 ...
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... V Coil 20 Zarlink Semiconductor Inc. Comments codec Transient Voltage Suppressor, Power 80 V Innovations 100 response time 2 W Fusible or PTC protection resistors 1/4 W Sense resistors 1/8 W Impedance control resistor 1/8 W Receive path gain resistor ...
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... 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 21 Zarlink Semiconductor Inc. ...
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... 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 22 Zarlink Semiconductor Inc degrees. ...
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... Updated "Am" OPNs (Ordering Part Numbers) to "Le" throughout document • The following changes were made to the "Ordering Information" section: – Removed chip graphic – Added entries for Le79231JC and Le79231QC – Added notes • In "Features," added bullet for space savings feature • ...
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... 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. ...