LE9551CMQCT Microchip

Le9551 Ringing Subscriber Line Interface Circuit VE950 Series Preliminary Data Sheet Document Code PD-000244374 Version 4 May 2019 Features Ordering Information Optimized to work with Broadcom BCM338x/ BCM339x Cable SoCs for short loop EMTA Applications Le9551CMQC 28-pin QFN Tray Le9551DMQC 28-pin QFN Tray Single Channel High Voltage Ringing SLIC that is functionally equivalent to the Le9541 Le9551CMQCT 28-pin QFN Tape and Reel Software equivalent to Le9541 Le9551DMQCT 28-pin QFN Tape and Reel Available in a 4x5 28-pin QFN that is cost optimized for single channel applications All devices are in green package.The green package meets High Voltage High Bandwidth Design Supports RoHS 2 Directive 2011/65/EC of the European Council to 7-kHz Wide Band Applications minimize the environmental impact of electrical equipment. - Up to 145 V ringing battery Le9551D - Up to 100 V ringing battery Le9551C Operation Control and Status Report through Serial Interface with Reset Supports GR909 Testing DC Loop Closure/Ring Trip/Thermal Shutdown Loop Start, Ring Trip, and Ring-Ground RTFLT VBAT Detections with Two Thresholds GAIN = 13.67 RESET LOOP Thermal Shutdown Protection with Hysteresis EN VITR AAC STATUS CLK SERIAL INTERFACE DIN Test Load Switch Supports Integrated Test DOUT TXI BATTERY Algorithms VDD RECTIFIER SUPPLY VTX IREF VCC Description BIAS VREF AX (ITR/432) The Le9551 is cost optimized for a single channel ITR Gain = 8 application. It is offered in a small 4x5 28-pin QFN. RCVP PT AT AC This device provides battery feed, ringing, and + DC CURRENT supervision on voice loops found in short-loop Cable SENSE FEED RN VREF applications. The Le9551 is optimized to interface to + AR PR the Broadcom BCM338x or BCM339x families of RING Cable SoCs. It is software equivalent to the Microsemi RINGP TEST Gain = 150 SWITCH Le9541, so no software change is needed from a TLD DCF current Le9541 design. Operational control and status report are communicated through a serial interface with reset. These devices support wide-band Figure 1 - Block Diagram applications and GR909 testing. 1 Microsemi Corporation Confidential and Proprietary CONFIDENTIALLe9551 Preliminary Data Sheet Table of Contents Features . 1 Description 1 Product Description . 4 Power Supplies . 4 Operating States 4 Communication Interface . 5 Package 5 Protection . 5 Thermal 5 Connection Diagram . 6 Pin Descriptions 7 Absolute Maximum Ratings . 9 Thermal Resistance . 9 Package Assembly 9 Operating Ranges 10 Environmental Ranges 10 Electrical Ranges 10 Electrical Characteristics 11 Supply Currents . 11 Power Dissipation 12 Line Characteristics 13 Serial Interface Characteristics 18 Serial Interface Operations and Definitions . 19 Serial Interface Operations . 19 Bit Assignments . 20 Test Circuit . 23 Applications 26 In-rush Control 26 Loop Closure and Ring Trip Detection Thresholds with Hysteresis 26 Design Examples 27 Application Circuit Parts List 28 Physical Dimensions . 29 28-pin QFN . 29 Revision History . 30 Version 1 30 Version 1 to Version 2 30 Version 2 to Version 3 30 Version 3 to Version 4 30 2 Microsemi Corporation Confidential and Proprietary CONFIDENTIAL