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| MH88617 Programmable SLIC with Ringing Amplification Advance Information Features * * * * * * * * * * * * * Fully programmable line impedance,network balance impedance and gains Programmable loop current with long loop capability 2-4 Wire conversion Power down and wake up Battery feed to line with wide operating range Off-hook and dial pulse detection Over-current protection Integral ringing amplifier with auto ring trip Tip/Ring reversal Meter pulse injection On-hook transmission to the line capability Relay driver Short loop ringing capability with low voltage DC supply DS5037 ISSUE 5 October 2001 Ordering Information MH88617AV-PI 21PIN SIL Package -40C to 85C Description The Zarlink MH88617 is a highly featured, low cost Subscriber Line Interface Circuit (SLIC). It provides a total analog transmission and signalling link between a CODEC and a subscriber line. All functions are integrated into a single thick film hybrid module, which provides high reliability and optimum circuit design needing a minimum of external components. The line impedance, network balance impedance, gain and loop current are all externally programmable, making the device suitable for a wide range of applications worldwide. Applications Line interface for: * PABX/Key Telephone System * Analog Terminal Adaptors * Pair Gain System * Fibre in the Loop/Wireless Local Loop VBAT VCC VEE GND LCA LR Power Management Reversal GVX Constant Current Control 2 - 4 Wire Conversion Supervision Programmable Impedance ZA Gain Adjust & Programmable Network Balance TIP VX VR TIP / RING Drive and RING Sense Ringing Control and Amplifier Auto Ring Trip Metering Injection Relay Driver RDI RC RV DCRI SHK ESI ESE RDO Figure 1 - Functional Block Diagram 1 MH88617 DCRI RDI RDO TIP IC RING IC LR RC ESE ESI LCA IC IC VBAT IC SHK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 Pin DIL 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VX GVX DCRI IC IC IC VCC AGND VEE ZA RV VR RDI RDO LR TIP RING VBAT LCA VX GVX VR VCC AGND VEE RV ESE ESI IC SHK RC ZA Advance Information 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 21 Pin SIL Figure 2 - Pin Connections Pin Description 28 Pin DIL 26 16 15 5 1 3 12 9 21 Pin SIL 1 2 3 4 5 6 7 8 Name DCRI RDI RDO LR TIP RING VBAT LCA Description DC Ringing Voltage Input. A continuous DC voltage is applied to this pin. This voltage is the positive supply rail for the internal ringing amplifier. Relay Driver Input. Relay driver control pin. Relay Driver Output. Open collector relay driver output. Line Reversal. Setting this pin to a logic 0 will perform a line reversal. This pin must be connected to logic 1 for normal operation. Tip Lead. Connects to the "Tip" lead of the subscriber line. Ring Lead. Connects to the "Ring" lead of the subscriber line. Battery Voltage. Battery supply for the subscriber line. Typically -48V DC is applied to this pin. Loop Current Adjust. The loop current is programmed by connecting a resistor between this pin and the VCC or AGND pins. Leaving this pin open circuit defaults the loop current to 24mA. Setting this pin to 0V will apply power down. Transmit Signal (Output). 4-wire analog signal from the SLIC. Transmit Gain Adjust. The transmit gain can be programmed by connecting a resistor between this pin and VX. The Network Balance Impedance can also be programmed by connecting external matching components from this pin to VR. Receive Signal (Input). 4-wire analog signal to the SLIC. Positive Supply Voltage. +5V. 28 27 9 10 VX GVX 17 22 21 20 11 12 13 14 VR VCC AGND Analog Ground. Ground path for the subscriber line and all DC power supplies, normally connected to system ground. VEE Negative Supply Voltage. -5V. 2 Advance Information Pin Description (continued) 28 Pin DIL 18 21 Pin SIL 15 Name RV Description MH88617 Ringing Voltage. A low level AC sinusoid is applied to this pin. This signal is amplified and output from TIP/RING to the line as the ringing signal, when RC is at logic 1. This pin should be driven with a low impedance AGND centred source. External Signal Enable. Meter pulse input enable. External Signal Input. Meter pulse input. Internal Connection. No connection should be made to this pin. 7 8 2, 4,10 11,13 ,23 25,24 16 17 18 ESE ESI IC 14 6 19 19 20 21 SHK RC ZA Switch Hook Detect (Output). A logic 1 at this pin indicates when the subscriber has gone Off-Hook. Ringing Control (Input). A logic 1 will cause the ringing voltage to be applied to the line. Line Impedance. Connect passive components from ZA to ground to match input and line impedance. Tip and Ring consists of both the signal from the device to the line and the signal from the line to the device. The signal input at VR being sent to the line, must not appear at the output VX. In order to prevent this, the device has an internal cancellation circuit, the measure of this attenuation is Transhybrid Loss (THL). The MH88617 has the ability to transmit analog signals from VR through to Tip and Ring when onhook. This can be used when sending caller line identification information. Functional Description The MH88617 is a Subscriber Line Interface Circuit (SLIC) used to provide an analog interface between the 4-wire connection and the 2-wire subscriber line of a communications system. It provides powering of the subscriber line along with signalling, control and status circuits. This combines to provide a comprehensive line and interface solution in applications such as PABX, Key Systems, Analog Terminal Adapters, Pair Gain Systems, Fibre in the Loop and Wireless Local Loop. Battery Feed and Loop Current Adjust The MH88617 has an active feedback circuit to regulate the DC current to the subscriber line. This current is programmable over a wide range via the LCA pin. With LCA open circuit the current will be set to 24mA. This can be increased up to 55mA by connecting a resistor between LCA and VCC or reduced down to 14mA by connecting a resistor between LCA and AGND. MSAN-156 shows a table of resistor values and loop current. The line driver stage is biased between +5V and -48V DC. Therefore it should be noted that loop current will flow in the +5V supply, this must be taken into consideration when choosing the +5V supply. The device will operate over a very wide VBAT supply range but care must be taken when programming the constant current that the maximum External Protection Circuit An External Protection Circuit assists in preventing damage to the device and the subscriber equipment, due to over-voltage conditions (see Figure 3). Also reference MSAN-156. 2-4 Wire Conversion The SLIC converts the balanced 2-Wire input at Tip and Ring to a ground referenced signal at VX. The device converts the ground referenced signal input at VR to a balanced 2-Wire signal across Tip and Ring. Normally the VX and VR pins connect to a Codec that interfaces the analog signal to a digital network.During full duplex transmission, the signal at 3 MH88617 power dissipation is not exceeded. For the majority of applications this will not be a problem, however the device could be damaged if used to drive a very short line with the maximum battery voltage and maximum programmable loop current. For very long loops the constant current drive reverts to a constant voltage source. A graph of loop current versus line resistance is shown in Figure 4. Under fault conditions, Tip or Ring are protected from short circuits to ground when the current exceeds the protection trip threshold. Under these circumstances, the SLIC will go into a power down mode and periodically check the line status until the fault has been removed. Thereby minimizing power dissipation. The SLIC will revert to an operational state once the fault is removed. Advance Information The SLIC also has the ability to provide ringing on short loops without the need for a high voltage DCRI supply. This is achieved by connecting the DCRI pin to a low voltage supply such as +5V or +12V providing the subscriber equipment ringing detector has a low enough sensitivity threshold. In this application the input at RV needs to be a square wave (refer MSAN-156). The SLIC has an automatic ring-trip circuit that ensures the ringing is removed when the subscriber goes off-hook. However the user must still insure RC is taken to logic 0 when SHK signals the subscriber has gone off-hook. Programmable Input Impedance By connecting external passive components between ZA and ground (AGND) the device's input impedance can be set to match the line impedance. As shown in Figure 3 and Table 1. A more comprehensive list is given in MSAN-156. Ringing Amplification The MH88617 incorporates an internal ringing amplifier circuit. A balanced ringing signal is applied across Tip and Ring, when a DC voltage is connected to the DCRI pin, a low level sinusoidal signal is applied to RV and RC is set to logic 1. The ringing voltage is approximately 50 times the signal at RV. The gain depends on the ringer load and impedance at ZA. If an absolute gain is required, a transistor can be fitted across ZA to give 42. +5V -5V C1 -48V 0-100V C2 Programmable Network Balance The network balance of the device can be programmed by connecting external passive components between GVX and VR, as shown in Figure 3 and Table 1. +5V 10k SD3 SD2 SD1 SD0 VX R1 1.0Vrms Sinewave (16-68Hz) VCC VEE F1 TIP E.G Teccor P2353AB VBAT DCRI RV LR RDI MT896x CA F1i CLK DSTi DSTo TIP Protection Circuit F2 RING MH88617 ESE RC VX RING SHK Relay Drive Output Loop Current Adjust Input SHK RDO LCA AGND ZA GVX T Z2 VR ESI R2 VR Notes: 1) For Resistor and Impedance values see Table 1 2) C1 and C2 are 100nF decoupling capacitors 3) F1 and F2 Slow Blow Fuses Z1 1.0Vrms Sinewave (12/16kHz) Figure 3 - Typical Application Circuit 4 Advance Information ILOOP MH88617 VBAT @ -48V LCA O/C 24mA 14mA Constant Current Constant Voltage RLOOP 0 1800 2800 Figure 4 - Loop Current vs. Line Resistance Table 1 gives table of values for some common applications. A more comprehensive list is given in MSAN-156. for optimum performance forward operation is recommended. Meter-Pulse Injection Programmable Transmit and Receive Gain The transmit gain from Tip and Ring to VX can be programmed by connecting a resistor between GVX and VX. Similarly the Receive Gain from VR to Tip and Ring can be programmed by connecting an impedance in series with VR as shown in Figure 3 and Table 1. Refer to MSAN-156 for additional impedances. If the External Signal Enable (ESE) is taken to logic 1 and a 12kHz or 16kHz Meter Pulse signal is applied to the ESI pin then this signal will be amplified and output across Tip and Ring. This is used for calculating the cost of a telephone call. The gain of the meter pulse signal varies with programmed input impedance e.g. with the input impedance programmed for 600 and a 200 AC load applied across Tip and Ring the ESI signal will be amplified by a factor of 2. Some applications require the 12/16 kHz meter pulse signal to be ramped before being input at ESI. Off-Hook and Dial Pulse Detection The switch hook detect output (SHK) goes to a logic 1, when loop current is above the detect threshold (see DC Electrical Characteristics). This occurs when the subscriber's equipment seizes the line to initiate a call or answer a call. When loop disconnect dialling is being used, SHK pulses to logic 0 to indicate the digits being dialled. This output should be debounced by the system software. During On-hook transmission SHK remains at logic 0. Power Down If AGND is applied to LCA pin the MH88617 will enter a power down mode where the internal circuitry is turned off and the power consumption is reduced. This can be used to conserve power when the line is inactive. If the system wants to initiate a call the AGND must be removed from the LCA before the ringing signal is transmitted. If the subscriber initiates a call by seizing the line, SHK will go to logic 1. The system should monitor this and respond by removing the AGND from LCA causing the device to wake up. Reversal During normal operation i.e. LR connected to logic 1, the DC voltage on Tip is positive with respect to Ring. This can be reversed by applying a logic 0 to the Line Reversal pin (LR). This feature is used for signalling. The SLIC is functional during reversal but 5 MH88617 Relay Driver An open collector output is provided as a driver for an external relay. Applying 5V to the RDI pin will cause the RDO pin to sink current to ground. A flyback diode must be connected across the relay coil to protect this output. The DC load of the relay coil must not exceed 20. Advance Information Mechanical Data See Figure 11, 12, 13, and 14 for details of the mechanical specification. Line Conditions Line Impedance 600 600 600 370+620/ /310nF 220+820/ /115nF 900 270+750/ /150nF Balance Impedance 600 600 350+1K //210nF 370+620 //310nF 220+820 //115nF 900 270+750 //150nF VX Gain 0dB 4dB 0dB 0dB 0dB 0dB 0dB VR Gain 0dB -4dB 0dB 0dB 0dB 0dB 0dB Z1 30k 30k 60k//30k Programming Components Z2 18k + 18k T 470pF 28k5 + 28k5 T 330pF 18k + 18k T (10k3+5.3nF) 18k + 18k T 100pF 36k 18k+18k T 330pF 18k+18k T 100pF R1 36k 57k 36k 36k 36k 36k 36k R2 110k 180k 110k (124k//1.5nF) + 64k (164k//550pF) + 34k 174k (150k//760pF) + 48k5 40k//(1.2nF+ 32k5) 41k//(630pF+3k) 38k9 40k3//(11k5+730pF) Table 1 - External Programming Components Note: The programming component values shown, give the optimum performance in terms of gain accuracy, return loss and THL. A compromise is these values can be made if a reduction in performance is acceptable. 6 Advance Information Absolute Maximum Ratings* - All voltages are with respect to AGND unless otherwise specified. Parameter 1 2 3 4 5 6 7 8 DC Supply Voltage DC Battery Voltage DC Ringing Voltage DC Reference Voltage Relay Driver Voltage Relay Driver Coil Resistance Ringing Input Voltage Maximum Power Handling Capacity (Off-hook) RV Sym VCC VEE VBAT VDCRI LCA RDO Min -0.3 -6 -75 -0.7 -0.3 -0.3 230 0 3 Max 6 0.3 0.3 150 6 15 MH88617 Units V V V V V V (for 5V relay) Vrms Note 1 mW mW mW C @ 25C @ 70C @ 85C PD 2250 1530 1290 -55 +125 9 Storage Temperature TS *Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. . Recommended Operating Conditions Parameter 1 2 3 4 5 DC Supply Voltages DC Battery Voltage DC Ringing Voltage Ringing Input Voltage Ringing Output Power Sym VCC VEE VBAT VDCRI RV PR 2250 Min 4.75 -5.25 -72 5 Typ 5.0 -5.0 -48 Max 5.25 -4.75 -20 110 2.5 Units V Test Conditions V V V Vrms mW Note 1 @ 25C 6 Operating Temperatures TOP -40 25 85 C Typical figures are at 25C with nominal supply voltages and are for design aid only Note 1: Applies to a sinusoidal input. RV can also be driven with a TTL signal (AC coupled) see MSAN-156. 7 MH88617 DC Electrical Characteristics Characteristics 1 Supply Current ICC ICC IEE IBAT IDCRI IDCRI 2 Power Consumption PC 12 ILoop + 12 -12 -3 100 100 40 270 24 14 2000 55 80 mA mA mA mA A mA mW mW mA mA Sym Min Typ Max Units Advance Information Test Conditions Test circuit as Fig 7 On-Hook Off-Hook Note On-Hook On-Hook RC at logic 0 RC at logic 1 Power down, On-hook = -48V Idle LCA O/C, Vbat = -48V RLoop = 300, VCC = 5V 3 4 5 Constant current feed to line Adjustable loop current range Maximum operating loop resistance Tip or Ring to Gnd, OverCurrent Protection Low Level Output Voltage High Level Output Voltage Relay driver current sink capability Low Level Input Voltage High Level Input Voltage Low Level Input Current High Level Input Current ILoop ILoop RLoop ILoop = 18mA, Vbat = -48V includes telephone set Vbat = -48V IOL = 4mA IOH = 0.4mA For SV Relay 6 7 100 VOL VOH 2.4 20 VIL VIH IIL IIH 5.0 0.1 0.5 4 8.5 13 0.8 0.4 mA V V mA V V mA mA mA 8 9 10 Switch Hook detect threshold Vbat = -48V Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. Typical figures are at 25C with nominal supply voltages and are for design aid only. Note: Figure quoted is the +5V supply current plus loop current which flows between -48V (battery supply) and the +5V supply. 8 Advance Information AC Electrical Characteristics Characteristics 1 Ringing drive capability Sym Min 5 Typ Max Units REN MH88617 Test Conditions 5 REN=1400 @ 20Hz RLOOP = 1800 V@Load=35Vrms (@25C) DCRI=100VDC Vbat=-48V VBAT = -48V DC VDCRI = 100V DC RV = 1.2Vrms sinewave, REN 5 Test circuit as Fig 5 200 40 10 10 -0.2 -12 6 -0.25 -0.2 -12 -0.25 THD 0 0 0 0.25 0.2 6 0.25 1 5 CMRR Nc Nc PSRR 25 25 THL 18 21 dB dB dB 48 12 12 dB % % dB dBrnC dBrnC Test circuit as Fig 6 300 - 3400Hz Test circuits as Fig 6&7 Output 0dBm @ 1kHz Test circuits as Fig 6&7 Output +3dBm @ 1kHz Test circuit as Fig. 9 200 - 3400Hz Test circuit as Fig. 7 Input 0V Test circuit as Fig. 7 Input 0V Test circuit as Fig. 7 Ripple 0.1Vrms 1kHz @ VCC/ VEE / VBAT / VDCRI Test circuit as Fig 7 300 - 3400Hz 500 - 2500Hz Test circuit as Fig 8 300 - 3400Hz 0 0.2 6 mS mS k dB dB dB dB dB Test circuit as Fig 7 Input 0.5V at 1kHz T-R Load > 10k, Output<2.25V @ 1kHz Test circuit as Fig 7 300 - 3400Hz Test circuit as Fig 6 Input 0.5V @ 1kHz RV = 16Hz, RC = 1 RC at logic 0 2 AC Ringing Amplifier Gain (Note 5) Output Voltage (Note 3) Frequency Range Auto Ring Trip & SHK detect time Ring Trip SHK Input Impedance at VR Output Impedance at VX Receive Gain (VR to 2-Wire) Off-Hook Programmable Range On-Hook (relative to Off-Hook) ARING VRING FRING 50 60 16 68 Vrms Hz 3 4 5 6 7 8 Frequency Response Gain (relative to Gain @ 1kHz) Transmit Gain (2-Wire to VX) Programmable Range 9 10 11 12 13 14 15 Frequency Response Gain (relative to Gain @ 1kHz) Total Harmonic Distortion at VX and 2-Wire. Overload at VX and 2-Wire. Common Mode Rejection Ratio Idle Channel Noise at VX Idle Channel Noise at 2-Wire Power Supply Rejection Ratio at VX and 2-Wire VX 2-Wire Transhybrid Loss 16 17 Return Loss at 2-Wire RL 18 dB 9 MH88617 AC Electrical Characteristics Characteristics 18 Longitudinal to Metallic Balance Sym Min 55 48 ESO 1.75 Typ 60 53 2 2.25 Max Units dB dB Vrms Advance Information Test Conditions Test circuit as Fig. 9 200-1000Hz 1000-3400Hz Test circuit as Fig. 10 ZA= 30K (600R config) T-R AC Load = 200, ESI = 1Vrms 19 Meter Pulse output level (Note 5) Audio settling time after reversal 20 50 mS Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. Typical figures are at 25C with nominal power supplies unless otherwise stated and are for design aid only. Test conditions shown in Figures 7-12 are programmed for 600. Note 1: All of the above test conditions use a test source impedance which matches the device's impedance. Note 2: dBm is referenced to 600 unless otherwise stated. Note 3: The typical output voltage from the ringing amplifier assumes the output is unloaded. Note 4: The test shown is for 600R impedance for other impedance use the programming components as shown in Table 1. Note 5: The gain will change depending on the programming components at ZA. For amplifier gain MSAN156 describes a circuit where the gain can be guaranteed to be 42. 10 Advance Information MH88617 +5V -48V +5V -5V +90V 1K LCA VX R1 GVX Z2 R2 VR ZA RDI LR VBAT VCC VEE DCRI SHK TIP I SW1 1 10uF DUT 2 300R RING RV 3 1.6k RDO ESI ESE GND RC Z1 100 1K Ringing Source 1.2Vrms 20Hz Z1 = 30k Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Figure 5 - DC Condition Test +5V -48V +5V -5V +90V 1K LCA VX R1 GVX Z2 VR R2 ZA RDI LR VBAT VCC VEE DCRI SHK TIP 100uF + 10H 1k I=24mA 100uF + Vs Impedance = 600 DUT RDO ESI ESE GND RC RING RV Z1 100 1K Ringing Source 1.2Vrms Z1 = 30k Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k 4-2 Wire Gain = 20 * Log (VX / Vs) Figure 6 - 2-4 Gain Wire Test Circuit 11 MH88617 Advance Information +5V -48V +5V -5V +90V 1K LCA VX R1 GVX Z2 VR R2 Vs Z1 ZA LR VBAT VCC VEE DCRI SHK TIP 100uF + 10H 1k I=24mA 100uF + DUT Zin (600) RDI RDO ESI ESE GND RC RING RV 100 1K Ringing Source 1.2Vrms 20Hz Z1 = 30k Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Gain = 20 * Log (V(Zin) / Vs) Figure 7 - 4-2 Wire Gain Test Circuit +5V -48V +5V -5V +90V 1K VX R1 GVX Z2 R2 VR LCA LR VBAT VCC VEE DCRI SHK TIP 100uF + 10H 1k I=24mA 100uF + V1 Zin 300 Vs 300 DUT ZA RDI RDO ESI ESE GND RC RING RV Z1 100 1K Ringing Source 1.2Vrms 20Hz Return Loss = 20 * Log (2V1/Vs) Z1 = 30k Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Figure 8 - Return Loss 12 Advance Information MH88617 +5V -48V +5V -5V +90V 1K VX R1 V2 Z2 R2 VR ZA GVX LCA LR VBAT VCC VEE DCRI SHK TIP 100uF + 300 10H 1k I=24mA 100uF + DUT V1 300 Vs RDI RDO ESI ESE GND RC RING RV Z1 100 1K Ringing Source 1.2Vrms 20Hz Z1 = 30k Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Long. to Met. Balance = 20 * Log (V1 / Vs) CMRR = 20 * Log (V2/Vs) Figure 9 - Longitudinal to Metallic Balance & CMRR Test Circuit 0.1 Max 0.14 Max (2.5 Max) (3.5 Max) 2.120 Max (53.85 Max) 0.75 + 0.02 (19.0 +0.51) 1 0.180 + 0.020 (4.57 + 0.51) 0.020 + 0.005 (0.5 + 0.13) 0.010 + 0.002 (0.25 + 0.05) Notes: 1) Not to scale 2) Dimensions in inches. (Dimensions in millimetres) 3) Pin tolerances are non-accumulative. 4) Recommended soldering conditions: wave soldering max. temp: 260C for 10 secs. * Dimensions to centre of pin. * 0.05 + 0.01 (1.3 + 0.25) * 0.100 + 0.010 (2.54 + 0.25) Figure 10 - Mechanical Data for 21 Pin SIL Hybrid 13 For more information about all Zarlink products visit our Web Site at www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request. Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2002, Zarlink Semiconductor Inc. All Rights Reserved. TECHNICAL DOCUMENTATION - NOT FOR RESALE |
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