L9500A

L9500A AGERE | Alldatasheet

Document overview

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Technical content

Features

■ Differential ringing and codec interface ■ Onboard ringing generation ■ Three ringing input options: — Sine wave — PWM — Logic level square wave ■ Flexible VCC options: — 5 V or 3.3 V VCC — No –5 V required ■ Battery switch to minimize off-hook power ■ Eight operating states: — Scan mode for minimal power dissipation — Forward and reverse battery active — On-hook transmission states — Ground start — Ring mode — Disconnect mode ■ Ultralow on-hook power: — 27 mW scan mode — 38 mW active mode ■ Loop start, ring trip, and ground start detection ■ Software-controllable dual current limit option ■ 28-pin PLCC package ■ 48-pin MLCC package

Applications

■ Interface to Broadcom : — BCM3351 Cable Modem — BCM3352 Cable Modem — BCM6352 Integrated Multi-Media Adaptor — BCM1101 Residential Gateway ■ Cable Modem ■ Voice over Internet Protocol (VoIP) ■ Voice over DSL ■ Remote Subscriber Units ■ Broadband Wireless ■ Short Loop Access

Description

This device is optimized to provide battery feed, ring- ing, and supervision on short-loop plain old tele- phone service (POTS) loops. This device provides power ring to the subscriber loop through amplification of a low-voltage input. It provides forward and reverse battery feed states, on- hook transmission, a low-power scan state, ground start (tip open), and a forward disconnect state. The device requires a V CC and battery to operate. VCC may be either a 5 V or a 3.3 V supply. The ring- ing signal is derived from the high-voltage battery. A battery switch is included to allow for use of a lower- voltage battery in the off-hook mode, thus minimizing short-loop off-hook power. Ring mode overhead is collapsed, allowing rail-to-rail operation. In this manner, the L9500 can operate from a lower 75 V battery to minimize critical power consumption and at the same time extend subscriber ringing loop lengths to 500 Ω and beyond. Loop closure, ring trip, and ground start detection is available. The loop closure detector has a fixed threshold with hysteresis. The ring trip detector requires a single-pole filter, thus minimizing external components required. The dc current limit is set and fixed by a logic-control- lable pin. Ground or open applied to this pin sets the current limit at the low or high value. The device is offered with differential ringing and receive input, making it ideal for direct interface to DOCSIS compliant cable modem gateway products.

September 2001High-Voltage Ringing SLIC for VoIP Applications L9500A 2 Agere Systems Inc. Table of Contents Contents Page

September 2001High-Voltage Ringing SLIC for VoIP Applications L9500A 4 Agere Systems Inc. ■ On board balanced ringing generation: — No ring relay — No bulk ring generator required — 15 Hz to 70 Hz ring frequency supported — Sine wave input-sine wave output — PWM input-sine wave output — Square wave input-trapezoidal output ■ Power supplies requirements: — V CC talk battery and ringing battery required — No –5 V supply required — No high-voltage positive supply required ■ Flexible Vcc options: — 5 V or 3.3 V V CC operation — 5 V or 3.3 V VCC interchangeable and transparent to users ■ Battery switch via logic control: — Minimize off-hook power dissipation ■ Minimal external components required ■ Eight operating states: — Forward active, V BAT2 applied — Polarity reversal active, VBAT2 applied — On-hook transmission, VBAT1 applied — On-hook transmission polarity reversal, VBAT1 applied — Ground start — Scan — Forward disconnect — Ring mode ■ Unlatched parallel data control interface ■ Ultralow SLIC power: — Scan 38 mW (VCC = 5 V) — Forward/reverse active 54 mW (VCC = 5 V) — Scan 27 mW (VCC = 3.3 V) — Forward/reverse active 41 mW (VCC = 3.3 V) ■ Supervision: — Loop start, fixed threshold with hysteresis — Ring trip, single-pole ring trip filtering, fixed thresh- old as a function of battery voltage — Ground start fixed threshold with hysteresis ■ Adjustable current limit: — 25 mA or 40 mA via ground or open to control input ■ Overhead voltage: — Clamped typically <51 V differentially — Clamped maximum <56.5 V single-ended ■ Thermal shutdown protection with hysteresis ■ Device interfaces: — Differential receive interface — Singled-ended transmit interface — Differential ring input ■ Package options: — 28-pin PLCC — 48-pin MLCC ■ 90 V CBIC-S technology The L9500 is designed to provide battery feed, ringing, and supervision functions on short plain old telephone service (POTS) loops. This device is designed for ultralow power in all operating states. The L9500 offers 8 operating states. The device assumes use of a lower-voltage talk battery, a higher- voltage ringing battery, and a V CC supply. The L9500 requires only a positive VCC supply. No –5 V supply is needed. The L9500 can operate with a V CC of either 5 V or 3.3 V, allowing for greater user flex- ibility. The choice of VCC voltage is transparent to the user; the device will function with either supply voltage connected. Two batteries are used: 1. A high-voltage ring battery (V BAT1 ). VBAT1 is a maximum –75 V. VBAT1 is used for power ring signal amplification and for scan, on-hook transmission, and ground start modes. This supply is current limited to approximately the maximum power ringing current, typically 50 mA. 2. A lower-voltage talk battery (V BAT2 ). VBAT2 is used for active mode powering.

September 2001 High-Voltage Ringing SLIC for VoIP Applications L9500A Agere Systems Inc. 5 Description (continued) Forward and reverse battery active modes are used for off-hook conditions. Since this device is designed for short-loop applications, the lower-voltage V BAT2 is applied during the forward and reverse active states. Battery reversal is quiet, without breaking the ac path. Rate of battery reversal may be ramped to control switching time. The magnitude of the overhead voltage in the forward and reverse active modes has a typical default value of

7.0 V, allowing for an on-hook transmission of an undis-

torted signal of 3.14 dBm into 900 Ω . Additionally, this allows sufficient overhead for 500 mV of meter pulse if desired. This overhead is fixed. The ring trip detector is turned off during active modes to conserve power. Because on-hook transmission is not allowed in the scan mode, an on-hook transmission mode is defined. This mode is functionally similar to the active mode, except the tip ring voltage is derived from the higher V BAT1 rather than VBAT2 . In the on-hook transmission modes with a primary bat- tery whose magnitude is greater than a nominal

51 V, the magnitude of the tip-to-ground and ring-to-

ground voltage is clamped at less than 56.5 V. To minimize on-hook power, a low-power scan mode is available. In this mode, all functions except off-hook supervision are turned off to conserve power. On-hook transmission is not allowed in the scan mode. In the scan mode with a primary battery whose magni- tude is greater than a nominal 51 V, the magnitude of the tip-to-ground and ring-to-ground voltage is clamped at less than 56.5 V. A forward disconnect mode is provided, where all cir- cuits are turned off and power is denied to the loop. The device offers a ring mode, in which a power ring signal is provided to the tip/ring pair. During the ring mode, a user-supplied, low-voltage ring signal is differ- entially input to the device’s RING IN input. This signal is amplified to produce the power ring signal. This signal may be a sine wave or filtered square wave to produce a sine wave on trapezoidal output. Ring trip detector and common-mode current detector are active during the ring mode. With maximum V BAT1 and a sine wave input, the L9500 has sufficient power to ring a 5 REN (1386 Ω + 40 µF) ringing load into 500 Ω of physical resistance. This feature eliminates the need for a separate external ring relay, associated external circuitry, and a bulk ring- ing generator. See the Applications section of this data sheet for more information. Both the ring trip and loop closure supervision func- tions are included. The loop closure has a fixed typical 10.5 mA on- to off-hook threshold in the active mode and a fixed 11.5 mA on- to off-hook threshold from the scan mode. In either case, there is a 2 mA hysteresis. The ring trip detector requires only a single-pole filter at the input, minimizing external components. The ring trip threshold at a given battery voltage is fixed. Typical ring trip threshold is 42.5 mA for a –70 V V BAT1. The device offers a ground start mode. In this mode the tip drive amplifier is turned off. The device presents a high impedance (>100 kΩ ) to PT and a current limited battery (V BAT1 ) to PR. VBAT1 is clamped to less than 56.5 V in this mode at PR. The NSTAT loop current detctor is used for ring ground detection. In the ground start mode, since the loop current is common mode, the loop closure threshold is reduced in half, thus main- taining loop supervision at specified levels. Upon reaching the thermal shutdown temperature, the device will enter an all off mode. Upon cooling, the device will re-enter the state it was in prior to thermal shutdown. Hysteresis is built in to prevent oscillation. Data control is via a parallel unlatched control scheme. The dc current limit is fixed to either 25 mA or 40 mA depending if ground or open is applied to the V PROG current limit programming pin. Programming accuracy is ±8%. Circuitry is added to the L9500 to minimize the inrush of current from the V CC supply and to the battery supply during an on- to off-hook transition, thus saving in power supply design cost. See the Applications section of this data sheet for more information. The L9500 uses a voltage feed-current sense architec- ture; thus the transmit gain is a transconductance. The L9500 transconductance is set via a single external resistor, and this device is designed for optimal perfor- mance with a transconductance set at 300 V/A. This interface is single ended. The L9500 offers a differen- tial receive interface with a gain of 8. The L9500 is internally referenced to 1.5 V. This refer- ence voltage is output at the V REF output of the device. The SLIC output VITR is also referenced to 1.5 V. The SLIC inputs RCVP/RCVN are floating inputs. The L9500 is packaged in a 28-pin PLCC or a 48-pin MLCC package.

Figure 1. Architecture Diagram

Table 1. Pin Descriptions 14 3 N S T A T O Loop Closure Detector Output—Ring Trip Detector Output. exists or ringing is tripped or a ring ground has occurred. 24 5 V I T R O Transmit ac Output Voltage. Output of internal AAC amplifier. applied continuously, even during nonringing states. applied continuously, even during nonringing states. portional to the absolute value of the differential tip/ring current. This is used to set ring trip threshold. 88 C F 2 — Filter Capacitor. Connect a capacitor from this node to ground. 91 0 C F 1 — Filter Capacitor. Connect a capacitor from this node to CF2. spurious responses. A single-pole filter is needed. 12 15 AGND GND Analog Signal Ground. 14 19 V BAT1 PWR Battery Supply 1. High-voltage battery. 15 21 V BAT2 PWR Battery Supply 2. Lower-voltage battery. 16 23 BGND GND Battery Ground. Ground return for the battery supplies.

Table 1. Pin Descriptions (continued) Table 2. Control States Table 3. Supervision Coding tery reversal is not desired, this pin is left open. tery reversal is not desired, this pin is left open. u State Control Input. These pins have an internal 100 kΩ pull-up. 24 34 B1 I u State Control Input. These pins have an internal 100 kΩ pull-up. 25 35 B0 I u State Control Input. These pins have an internal 100 kΩ pull-up. with a network from this node to VTX. this pin is directly proportional to the differential tip/ring current. 0.1 µF capacitor from this pin to VTX.

100 S c a n

101 R i n g

0 = off-hook or ring trip or thermal shutdown or ring ground. 1 = on-hook and no ring trip and no thermal shutdown and no ring ground.

September 2001High-Voltage Ringing SLIC for VoIP Applications L9500A 10 Agere Systems Inc. State Definitions Forward Active ■ Pin PT is positive with respect to PR. ■ VBAT2 is applied to tip/ring drive amplifiers. ■ Loop closure and common-mode detect are active. ■ Ring trip detector is turned off to conserve power. ■ Overhead is set to nominal 6.0 V for undistorted transmission of 3.14 dBm into 900 Ω . Reverse Active ■ Pin PR is positive with respect to PT. ■ VBAT2 is applied to tip/ring drive amplifiers. ■ Loop closure and common-mode detect are active. ■ Ring trip detector is turned off to conserve power. ■ Overhead is set to nominal 6.0 V for undistorted transmission of 3.14 dBm into 900 Ω . Scan ■ Except for loop closure, all circuits (including ring trip and common-mode detector) are powered down. ■ On-hook transmission is disabled. ■ Pin PT is positive with respect to PR, and VBAT1 is applied to tip/ring. ■ The tip to ring on-hook differential voltage will be typ- ically between –44 V and –51 V with a –70 V primary battery. On-Hook Transmission— Forward Battery ■ Pin PT is positive with respect to PR. ■ VBAT1 is applied to tip/ring drive amplifiers. ■ Supervision circuits, loop closure, and common- mode detect are active. ■ Ring trip detector is turned off to conserve power. ■ On-hook transmission is allowed. ■ The tip-to-ring on-hook differential voltage will be typ- ically between –41 V and –49 V with a –70 V primary battery. On-Hook Transmission— Reverse Battery ■ Pin PR is positive with respect to PT. ■ VBAT1 is applied to tip/ring drive amplifiers. ■ Supervision circuits, loop closure, and common- mode detect are active. ■ Ring trip detector is turned off to conserve power. ■ On-hook transmission is allowed. ■ The tip-to-ring on-hook differential voltage will be typ- ically between –41 V and –49 V with a –70 V primary battery. Disconnect ■ The tip/ring amplifiers and all supervision are turned off. ■ The SLIC goes into a high-impedance state. ■ NSTAT is forced high (on-hook). ■ Device will power up in this state. Ring ■ Power ring signal is applied to tip and ring. ■ Input waveform at RINGIN is amplified. ■ Ring trip supervision and common-mode current supervision are active; loop closure is inactive. ■ Overhead voltage is reduced to typically 4 V. ■ Current is limited by saturation current of the amplifi- ers themselves, typically 100 mA at 125 °C. Ground Start ■ Tip drive amplifer is turned off. ■ Device presents a high impedance (>100 kΩ ) to pin PT. ■ Device presents a clamped (<56.5 V) current-limited battery (VBAT1 ) to PR. ■ Output pin RGDET indicates current flowing in the ring lead. Thermal Shutdown ■ Not controlled via truth table inputs. ■ This mode is caused by excessive heating of the device, such as may be encountered in an extended power-cross situation. NSTAT output is forced low or off hook during a thermal shutdown event.

periods can adversely affect device reliability. Table 4. Recommended Operating Characteristics Table 5. Thermal Characteristics

1. This parameter is not tested in production. It is guaranteed by design and device characterization.
2. Airflow, PCB board layers, and other factors can greatly affect this parameter.

28 PLCC Thermal Resistance Junction to Ambient (θJA)1, 2:

48 MLF Thermal Resistance Junction to Ambient (θ

September 2001High-Voltage Ringing SLIC for VoIP Applications L9500A 12 Agere Systems Inc.

Electrical Characteristics

Table 6. Environmental

1. Not to exceed 26 grams of water per kilogram of dry air.

Table 7. 5 V Supply Currents Table 8. 5 V Powering

Table 9. 3.3 V Supply Currents Table 10. 3.3 V Powering

Table 11. 2-Wire Port

Table 11. 2-Wire Port (continued) Table 12. Analog Pin Characteristics

300 Hz to 600 Hz

200 Hz to 1000 Hz

100 Hz to 4000 Hz

Table 13. ac Feed Characteristics

1. Set externally either by discrete external components or a third- or fourth-generation codec. Any complex impedance R1 + R2 || C between

150 Ω and 1400 Ω can be synthesized.

1. This parameter is not tested in production. It is guaranteed by design and device characterization.
2. VITR transconductance depends on the resistor from ITR to VITR. This gain assumes an ideal 4750 Ω , the recommended value. Positive cur-

rent is defined as the differential current flowing from PT to PR.

1004 Hz, 1020 Hz reference:

200 Hz—300 Hz

Table 14. Logic Inputs and Outputs (VCC = 5 V) Table 15. Logic Inputs and Outputs (VCC = 3.3 V) Table 16. Ground Start

Table 17. Ringing Specifications Table 18. Ring Trip ■ 10 kΩ resistor in parallel with a 6 µF capacitor applied across tip and ring. Ring frequency = 17 Hz to 23 Hz. ■ 100 Ω resistor in series with a 2 µF capacitor applied across tip and ring. Ring frequency = 17 Hz to 23 Hz.

5 REN 1380 Ω , 40 µF Load, 100 Ω Loop — 3 — %

Figure 4. Basic Test Circuit

September 2001 High-Voltage Ringing SLIC for VoIP Applications L9500A Agere Systems Inc. 21 Under normal device operating conditions, power dissi- pation on the device must be controlled to prevent the device temperature from rising above the thermal shut- down and causing the device to shut down. Power dis- sipation is highest with higher battery voltages, higher current limit, and under shorter dc loop conditions. Additionally, higher ambient temperature will also reduce thermal margin. To support required power ringing voltages, this device is meant to operate with a high-voltage primary battery (–65 V to –75 V typically). Thus, power control is nor- mally achieved by use of the battery switch and an aux- iliary lower absolute voltage battery. Operating temperature range, maximum current limit, maximum battery voltage, minimum dc loop length and protection resistors values, airflow, and number of PC board lay- ers will influence the overall thermal performance. The following example illustrates typical thermal design considerations. The thermal resistance of the 28-pin PLCC package is typically 35.5 °C/W, which is representative of the natu- ral airflow as seen in a typical switch cabinet with a multilayer board. The L9500 will enter thermal shutdown at a typical tem- perature of 150°C. The thermal design should ensure that the SLIC does not reach this temperature under normal operating conditions. For this example, assume a maximum ambient operat- ing temperature of 85 °C, a designed current limit of 30 mA, a maximum battery of –75 V, and an auxiliary battery of –21 V. Assume a (worst-case) minimum dc loop of 20 Ω of wire resistance, 30 Ω protection resis- tors, and 200 Ω for the handset. Additionally, include the effects of parameter tolerance. 1. T TSD – TAMBIENT(max) = allowed thermal rise. 2. Allowed thermal rise = package thermal impedance • SLIC power dissipation. 65 °C = 35.5°C/W • SLIC power dissipation SLIC power dissipation (PD ) = 1.83 W. Thus, if the total power dissipated in the SLIC is less than 1.83 W, it will not enter the thermal shutdown state. Total SLIC power is calculated as: Total P D = maximum battery • maximum current limit + SLIC quiescent power. For the L9500A, the worst-case SLIC on-hook active power is 64 mW. Thus, Total off-hook power = (ILOOP )(current-limit tolerance) * (VBATAPPLIED ) + SLIC on-hook power Total off-hook power = (0.030 A)(1.08) * (21) + 75 mW Total off-hook power = 744.4 mW The power dissipated in the SLIC is the total power dis- sipation less the power that is dissipated in the loop. SLIC P D = Total power – loop power Loop off-hook power = (ILOOP * 1.08)2 • (RLOOP(dc) min + 2RPROTECTION + RHANDSET ) Loop off-hook power = ((0.030 A)(1.08))2 • (20 Ω + 60 Ω + 200 Ω ) Loop off-hook power = 293.9 mW SLIC off-hook power = Total off-hook power – loop off-hook power SLIC off-hook power = 744.4 mW – 293.9 mW SLIC off-hook power = 450.5 mW < 1.83 W Thus, under the worst-case normal operating condi- tions of this example, the thermal design, using the auxiliary, is adequate to ensure the device is not driven into thermal shutdown under worst-case operating con- ditions.

current will increase slightly, as loop length decreases. response is given in Table 19. Table 19. Typical Active Mode On- to Off-Hook Tip/ with additional head room for a 500 mV PPM signal.

51 V, the magnitude of the open loop tip-to-ring open

ring mode, overhead is unaffected by VOVH . power conservation and SLIC thermal considerations.

Table 20. FB1 and FB2 Values vs. Typical Ramp 2 mA hysteresis with VCC = 3.3 V. RT is ring trip current in mA. BAT1 is the magnitude of the ring battery in V. There is a 6 mA to 8 mA hysteresis.

Figure 11. RINGIN Operation ance network cancels the unwanted amount of the receive signal that appears at the CODEC input.

designed on the Broadcom BCM93352SV application reference design and board. Figure 12. Reference Schematic with Broadcom BCM Embedded Codec Devices and Agere L9500 SLIC

Table 21. Parts List L9500; Agere L9500 and Broadcom BCM3352 (per Broadcom BCM93552SV Application R PT 50 Ω 1% Fusible or PTC Protection resistor. R PR 50 Ω 1% Fusible or PTC Protection resistor. Protector Agere L7591 — — Secondary protection. C BAT1 0.1 µF 20% 100 V VBAT filter capacitor. C BAT2 0.1 µF 20% 50 V VBAT filter capacitor. |VBAT2 | < |VBAT1 |. D BAT1 1N4004 — — Reverse current. C CC 0.47 µF 20% 10 V Ceramic bypass capacitor. C F1 0.22 µF 20% 100 V Filter capacitor. C F2 0.1 µF 20% 100 V Filter capacitor. C RT 0.1 µF 20% 10 V Ring trip filter capacitor. R RT 383 kΩ 1% 1/16 W Ring trip filter resistor. R GX 4750 Ω 1% 1/16 W Sets T/R to VITR transconductance. C TX 0.47 µF 20% 10 V ac/dc separation. C C1 0.1 µF 20% 10 V dc blocking capacitor. R DET 10 kΩ 1% 1/16 W Control.

September 2001High-Voltage Ringing SLIC for VoIP Applications L9500A 28 Agere Systems Inc. Outline Diagrams 28-Pin PLCC Dimensions are in millimeters. 5-2506r.8(F)

1.27 TYP

0.330/0.533 0.10 SEATING PLANE

0.51 MIN

4.572 MAX 12 18 41 2 6 12.446 ± 0.127 PIN #1 IDENTIFIER ZONE 11.506 ± 0.076 11.506 ± 0.076 12.446 ± 0.127

September 2001 High-Voltage Ringing SLIC for VoIP Applications L9500A Agere Systems Inc. 29 Outline Diagrams (continued) 48-Pin MLCC Dimensions are in millimeters. Notes: The dimensions in this outline diagram are intended for informational purposes only. For detailed schemat- ics to assist your design efforts, please contact your Agere Sales Representative. The exposed pad on the bottom of the package will be at VBAT1 potential. 0195mod PIN #1 IDENTIFIER ZONE 7.00 6.75 SEATING PLANE 0.08 0.65/0.80

0.20 REF

7.00 5.10 ± 0.15 3.50 3.375 6.75 0.00/0.05 SECTION C–C

11 SPACES @

0.50 = 5.50

0.50 BSC

0.18/0.30 0.30/0.45 0.01/0.05

1.00 MAX

12° 0.18/0.30 0.24/0.60 0.24/0.60 VIEW FOR EVEN TERMINAL/SIDE C L EXPOSED PAD

September 2001High-Voltage Ringing SLIC for VoIP Applications L9500A 30 Agere Systems Inc. Outline Diagrams (continued) 48-Pin MLCC, JEDEC MO-220 VKKD-2 Dimensions are in millimeters. Notes:The dimensions in this outline diagram are intended for informational purposes only. For detailed schemat- ics to assist your design efforts, please contact your Agere Sales Representative. The exposed pad on the bottom of the package will be at VBAT1 potential. 0195a INDEX AREA 7.00 3.50 SEATING PLANE

0.080.20 REF

7.00 5.00/5.25 3.50 0.50 = 5.50 0.18/0.30 0.02/0.05 1.00 MAX 0.23 0.30/0.50 (7.00/2 x 7.00/2) PIN #1 IDENTIFIER ZONE TOP VIEW SIDE VIEW DETAIL B 0.23 0.18 0.18 BOTTOM VIEW 2.50/2.625 EXPOSED PAD DETAIL B VIEW FOR EVEN TERMINAL/SIDE C L

September 2001 High-Voltage Ringing SLIC for VoIP Applications L9500A Agere Systems Inc. 31

Ordering Information

Device Part Number Description Package Comcode LUCL9500AGF-D SLIC 28-Pin PLCC, dry-bagged 108955501 LUCL9500AGF-DT SLIC 28-Pin PLCC, dry-bagged, tape and reel 108955519 LUCL9500ARG-D SLIC 48-Pin MLF, dry-bagged 108955485

Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. Copyright © 2001 Agere Systems Inc. All Rights Reserved September 2001 DS01-303ALC (Replaces DS01-081ALC) For additional information, contact your Agere Systems Account Manager or the following: INTERNET: http://www.agere.com E-MAIL: docmaster@agere.com N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286 1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106) ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon Tel. (852) 3129-2000, FAX (852) 3129-2020 CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen) JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei) EUROPE: Tel. (44) 7000 624624, FAX (44) 1344 488 045 Broadcom is a registered trademark of Broadcom Corporation. IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc. Murata is a registered trademark of Murata Manufacturing Company LTD.