V1-4 February 2005 Data Sheet Silver TELECOM Ag2410 HIGH PERFORMANCE QUAD TRUNK FEATURES TIP1 RING1 TIP2 RING2 TIP3 RING3 TIP4 RING4 TRUNK 1 TRUNK 2 TRUNK 3 TRUNK 4 VIN1 VOUT 1 VIN2 VOUT 2 • 4 highly featured Trunks (COIC, FXO) in a single Module. • Magnetic isolation providing high common mode rejection (CMRR) for use in un-grounded systems. • Highly integrated with on board loop switch and integral diode bridge. VOUT 3 • Loop Start operation with On-Hook reception and reversal detect (for Caller Line ID and remote metering). VIN4 • Ringing detection detection. VIN3 VOUT 4 Control and Supervision and Loop Current • Meets requirements of EN60950/UL1950, and FCC Pt68. • Minimum number of external components, single +5V system side power supply. • Programmable d.c. mask. • Silver Telecom “design-in” assistance. DESCRIPTION The Silver Telecom Ag2410 comprises four individual Trunk Circuits in a single Module. The combination of features and packaging offers extremely efficient use of board area, saving significantly on system size and cost. The Ag2410 has been designed to work with 600R line impedance and meets international safety and regulatory requirements. In addition to the features shown above the Ag2410 allows flexible programming of many functions, including the dc voltage mask. © Silver Telecom 2005 Each circuit requires a minimum of external components and has been specified for ease of use, to reduce time to market. The system interface has been designed for direct connection to popular Codecs of both the audio and signalling connections. The Ag2410 is designed for applications where there is a high level of common mode interference, such as PABX, long loop applications and systems without a ground. Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK Ag2410 QUAD TRUNK Silver TELECOM Figure 1: Packaging Format Ordering Information Ag2410 High Performance Quad Trunk VCC DMa1 DMb1 Tip1 Ring1 DMa2 DMb2 TRUNK 1 Line Termination & Loop Switch Power Management GND 2-4 Wire Converter Zb1 V ref1 Vout1 Vin1 RS 1 LC 1 Supervision LSC 1 Zb2 V ref2 Vout2 Vin2 TRUNK 2 RS 2 Tip2 Ring2 DMa3 DMb3 LC 2 LSC 2 Zb3 V ref3 Vout3 Vin3 TRUNK 3 RS 3 Tip3 Ring3 DMa4 DMb4 LC 3 LSC 3 Zb4 V ref4 V out4 Vin4 TRUNK 4 RS 4 Tip4 Ring4 LC 4 LSC 4 Figure 2: Block Diagram © Silver Telecom 2005 Page 2 Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK 1.0 Pin Description Pin # Name Description A B C D 1 8 15 22 2 9 16 23 3 10 17 24 nc No connect. This pin can be left open circuit. 4 11 18 25 nc No connect. This pin can be left open circuit. 5 12 19 26 DMa DC Mask a. A resistor is connected between this pin and DMb to adjust the d.c. characteristics of the termination. 6 13 20 27 DMb DC Mask b. A resistor is connected between this pin and DMa to adjust the d.c. characteristics of the termination. 7 14 21 28 nc 71 57 43 29 GND Analog ground. Normally connected to system ground. All four pins must be connected to Analog Ground. 72 58 44 30 VCC +5V supply. All four pins must be connected to +5V. 73 59 45 31 nc No connect. This pin can be left open circuit. 74 60 46 32 nc No connect. This pin can be left open circuit. 75 61 47 33 Zb Balance network. The network balance matching components are connected between this pin, VIN and GND. TIP (A) Tip. Connects to the subscriber line Tip. RING (B) Ring. Connects to the subscriber line Ring. No connect. This pin can be left open circuit. 76 62 48 34 VIN Audio In. This is the analog input signal from the Codec (which is output on Tip and Ring). Connected via a 100nF capacitor. 77 63 49 35 nc No connect. This pin can be left open circuit. 78 64 50 36 VOUT 79 65 51 37 nc No connect. This pin can be left open circuit. 80 66 52 38 LC Loop current. A logic 1 Indicates that loop current is flowing. 81 67 53 39 LSC 82 68 54 40 RS 83 69 55 41 nc 84 70 56 42 VREF © Silver Telecom 2005 Audio Out. This is the analog output signal (from Tip and Ring) to the Codec. Connected via a 100nF capacitor. Loop switch control. Applying a logic 1 closes the integral loop switch. Ringing signal. A logic 0 indicates the presence of ringing voltage on the telephone line. Toggles at twice the ringing frequency. Also RS indicates whether the line polarity has reversed with a pulse. No connect. This pin can be left open circuit. Analog reference. Bias voltage for analog circuitry. Must be de-coupled with 100uF. Page 3 Ag2410 V1.4 February 2005 Data Sheet 2.0 HIGH PERFORMANCE QUAD TRUNK output drive pins of a Codec or from a micro controller device. Line Interfacing The line interfaces on the Ag2410 provide a flexible and robust interface to the telephone line. They are designed to meet regulatory standards whilst providing a space and power efficient solution. 2.1 D.C. Termination. 2.2.2 Ringing Detection and Sensitivity. Any equipment terminating a telephone line must present the correct d.c. resistance to the line. This ensures that the correct current flows to be able to detect the off hook condition, avoids excessive power dissipation in the Subscriber Line Interface (SLIC) and the Subscriber’s equipment and minimises the size of power supply needed to drive the SLIC. The Ag2410 has been designed to meet the requirements of many network operators. This is done by making the d.c. characteristic adjustable. These are controlled by connecting the DM pins on the line side of the circuit. Table 1 shows how these are connected. Table 1 Set Up of the DM Pins Market DMa Europe (CTR21) Connect together through 470K resistor Far East Connect together through 270K resistor The Ag2410 provides an output, RS, which indicates the presence of ringing by switching from a logic 1 to logic 0. The RS output will toggle at twice the ringing frequency. A capacitor to ground can also be added if ringing cadence is needed rather than the ringing frequency. The sensitivity to ringing is set internally to 20Vrms. The ringing detect circuit will also detect DC polarity reversal at Tip/Ring. Since this is AC coupled only a pulse output (15mS min.) is given at the RS output at the instant of reversal. An example of this type of signalling is in Caller Line ID in the United Kingdom, where a battery polarity reversal precedes the transmission of data before the ringing signal is applied to the line. There must be greater than 30V across Tip and Ring for reversal detect to function correctly. This means that there is no detection when off-hook. Signalling and Loop Status. The Ag2410 provides facilities to monitor and control the telephone line. This allows the device to be used with a variety of loop signalling schemes and minimises the number of external components needed to implement a complete line interface. 2.2.1 The On-Board Loop Switch The Ag2410 implements the loop start protocol when initiating and answering a call. This means that a switch must be closed to allow loop current to flow, signalling to the SLIC that the terminating equipment has gone “off-hook”. This has been done historically by a relay. The Ag2410 uses an integral optically isolated switch to do this, eliminating the need for an external relay, so space and cost is saved for the user. The On-Board Loop Switch is controlled by the LSC pin. A logic 1 applied to the pin closes the loop switch. This is done when the terminating equipment wishes to begin a call or in response to the reception of the ringing signal. The LSC pin can be controlled by the © Silver Telecom 2005 The terminal equipment must be capable of detecting and responding to an incoming call in the same way as a telephone set. The termination circuitry must, therefore, detect the presence of the ringing signal. 2.2.3 Reversal Detect DMb North America Connect together (EIA 464, Resistive) through 270K resistor 2.2 Once the Loop Switch has been closed confirmation that loop current is flowing is provided by the LC pin. This can be used for fault detection and for call clear detection. 3.0 The 2-4 Wire (Hybrid) Conversion. Each circuit on the Ag2410 module transmits and receives balanced 2-wire analog signals at the Tip and Ring connections. These are converted to a ground referenced output at VOUT and from a ground referenced signal at VIN. VOUT and VIN are normally connected to a Codec (via d.c. blocking capacitors) for conversion to and from a Pulse Code Modulated (PCM) stream. 3.1 Transmit and Receive Gain. The gain in both the transmit and receive directions is set at 0dB. Any gain adjustments can be made using the Codec functionality. This is either by hardware or software depending upon the Codec used. Page 4 Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK Example 2-wire Impedance Network Balance Impedance Zbal1 Zbal2 Zbal3 C3 Notes 1 600Ω 600Ω 51K 36K 0Ω 47pF Far East, Middle East 2 600Ω AT&T compromise 33K 33K 15K 2700pF North America 3 Other Other 51K 36K 0Ω 47pF Program impedance using “intelligent” codec (e.g. SICOFI or QSLAC) Table 2: Line and Network Balance Impedance Examples 3.2 The 2 Wire Impedance 3.3 Network Balance Impedance The input impedance, ZIN, of each circuit is set internally to 600R. To provide other impedances, use a codec where the internal filter characteristics can be programmed to provide the correct matching. In order to generate the filter coefficients a model of the Ag2410 must be used. This file, in .CIR format is available on request from Silver Telecom or one of our representatives. The setting of the network balance can be done by programming of the Codec, using the .CIR file, or it can be done by hardware components. If the hardware technique is used a network must be connected between Zb and Vin. Common examples are shown in Table 2. 3.4 Full details on how the Codec is programmed must be obtained from the Codec manufacturer. On-Hook Reception The need to provide the facility for data exchange +5V For 600Ω application: R1 = 270K Zbal1 = 51K Zbal2 = 36K Zbal3 = 0Ω C1, C2, C4 = 100nF C3 = 47pF C5 = 10uF, 6.3V C6 – 100uF, 6.3V PTC = TR600-150 Thyristor = TVB270SA Zbal2 C5 Zbal3 + C3 C4 GND Zbal1 VCC DMa C1 V IN Ag2410 (1 channel) VOUT R1 GND Zb C2 DMb Codec PTC TIP RS LC LSC Thyristor Silver VREF TELECOM Protection Network RING + C6 GND GND Figure 3: A Single Channel Showing Impedance and Protection Components © Silver Telecom 2005 Page 5 Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK On-Hook is becoming increasingly common, whether for Caller Line I.D. or for telemetry purposes. The Ag2410 can receive signals On-Hook, presenting a high impedance to the line, i.e. while drawing a very small current (5µA approx) from the line. 3.5 4.1 Ringer Load Networks The “dummy ringer” is usually a capacitive/resistive load which is connected across TIP/RING. During a call it is of sufficiently high impedance not to affect the operation of the interface. The dummy ringer is integral to the Ag2410, and is suitable for CTR21 (Europe), USA and Asia. For other dummy ringer requirements not covered in this datasheet, please contact Silver Telecom, or their local representative. 4.0 by the Ag2410 the device protection is dependent upon regulatory standards in the market in which the equipment is deployed. Some examples are given below, but these are not exhaustive. Device Protection. FCC Pt 68 Requirements. To withstand the FCC Pt68 longitudinal voltage surge of 1500V no protection is required as the barrier will withstand 1500V peak voltage to GND. To withstand the FCC Pt68 metallic surges at 800V requires a 130V AC varistor (which clamps at 300V which is the rating of the loop switch transistor). A 14mm device should be used to withstand the two 100A 10/560us surges. Examples of suitable devices are:Joyin JVR-14N201K; Walsin VZ14D201KBS Note: If varistors to ground are used for added protection (e.g. more than 1500V may be seen in the As with many of the requirements which must be met For 600R line and balance impedance: (as required by the QSLAC) Protection circuit depends upon precise application DMa1 R1 DMb1 TIP1 RING1 Protection Circuit + V REF1 C15 0V DMa2 R2 DMb2 TIP2 R13 Ag2410 Quad Trunk Circuit + R15 V REF3 C17 0V DMa4 TE L EC OM R12 R16 + V REF4 C18 0V 0V GND V CC C13 R6 0V C8 V OUT4 RS4 LSC4 VIN3 CD13 C33 C12 C7 V IN4 RING4 VOUT3 C6 Zb4 DMb4 TIP4 0V C5 V OUT3 RS3 LSC3 R4 Protection Circuit R7 V IN3 Silver VIN2 CD12 C32 C11 R11 Zb3 + AMD QSLAC CODEC VOUT 2 C4 V OUT2 RS2 LSC2 RING3 0V C3 DMa3 Protection Circuit R6 V IN2 DMb3 TIP3 VIN1 CD11 C31 C10 R10 R14 R3 VOUT1 C2 Zb2 C16 0V 0V C1 V OUT1 RS1 LSC1 V REF2 C9 R5 V IN1 RING2 Protection Circuit R9 Zb1 VOUT4 VIN4 CD14 C34 5V + C14 Figure 4: A 4 Channel Circuit Using the AMD QSLAC © Silver Telecom 2005 R1-4 = 270k R5-R8 = 51k R9-12 = 0Ω R13-16 = 36k C1-8, C13 = 100nF C9-12 = 47pF C14 = 10uF C15-C18 = 100uF Page 6 Processor Interface Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK field) customers should be aware that the FCC test generator for longitudinal tests is rated at up to 1000A. 10Ω 2W wire wound surge limiting resistors will also be needed. 4.2 UL1459 and UL1950 Protection. To meet the UL1459 and UL1950 mains cross test 22Ω 2W wire wound surge resistors and 0.35A special fuses (Bussman C515 or Littelfuse 220003) in a balanced configuration are required. Alternatively a Teccor F1250T fuse may be used without surge limiting resistors. It is also possible to use PTC thermistors to meet these tests. The Raychem TR600-150 is designed for this application. See Raychem application notes for further details. 4.3 5.0 There are some aspects of international standards which are not fully met by the Ag2410. These are shown below. It is Silver Telecom’s policy to bring to the attention of customers all known exceptions. The Ag2410 meets the requirements of EN60950 (1992) paragraph 6.2.1.2 for all countries except Norway and Sweden. Please contact Silver Telecom if the product is needed for Norway or Sweden. User/Network safety from mains power voltage (UL1950/EN60950 paragraphs 2.1.1 and 6.2.1.4) must be provided externally by a power supply with reinforced or double insulation. 6.0 Layout Signal tracks should be kept as short as possible. Special attention should be paid to Dma, DMb and Zb, as these are sensitive nodes. Other Standards. For general mains cross protection (CCITT K21), a 47Ω 2W wire wound surge resistor and a PTC thermistor are sufficient. A suitable device is the Walsin PTD3A350H26. (Metallic protection with a single device is all that is required as the Ag2410 will withstand longitudinal voltages up to 1000Vrms to ground without additional protection). © Silver Telecom 2005 Regulatory Standards Page 7 Ag2410 V1.4 February 2005 Data Sheet 7.0 HIGH PERFORMANCE QUAD TRUNK Absolute Maximum Ratings* All Voltages are with respect to ground unless otherwise stated. Parameter Sym Min Max Units 1 DC supply voltage VCC -0.3 6.0 V 2 DC battery voltage present between Tip and Ring (on-hook) VTR 300 V 6.0 V 0.75 W 3 Maximum voltage on programmable pin, LSC -0.3 PTRU 4 Maximum power dissipation per trunk @ 25°C NK 5 Maximum power dissipation per module @ 25°C PTOT 3.0 W 6 Maximum loop current (continuous) ILOOP 100 mA 7 Maximum ring trip current (for 1 second) IRING 185 mA 8 Storage Temperature TS -40 +100 O C *Exceeding the above ratings may cause permanent damage to the product. Functional operation under these conditions is not implied. Maximum ratings assume free air flow. 8.0 Recommended Operating Conditions* All Voltages are with respect to ground unless otherwise stated. Parameter Symbol Min Typ Max Units VCC 4.75 5.0 5.25 V 1 DC supply voltage 2 DC battery voltage on Tip and Ring (on-hook) VTIP VRING 0 0 0 -48 -120 -120 V V 3 DC loop current ILOOP 0 25 85 mA 4 Operating Temperature TOP 0 25 70 O *Typical figures are at 25°C with nominal +5V supplies and are for design use only. © Silver Telecom 2005 Page 8 C Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK 9.0 DC Electrical Characteristics. Characteristic 1 Supply current (per trunk), on-hook3 2 Sym Min Typ2 Max Units Test Comments1 ICC 4.0 6.0 mA Power consumption, on-hook PTOT 20.0 80.0 mW 3 Loop current range ILOOP 14.0 85.0 mA 4 Status outputs, RS, LC Output low voltage Output high voltage VOL VOH 0.4 3.5 V V Control input, LSC Input low voltage Input high voltage VIL VIH 0.3 4.0 V V 6 Control input, LSC Input low current Input high current IIL IIH 10 2.0 µA mA 7 Off-hook DC voltage 8 Leakage current, Tip and Ring to analog ground ILA 9 Leakage current on-hook, Tip to Ring ILTR 5 @ 50µA @ -50µA V ILOOP = 20mA DMa-DMb=270k 10 µA 100VDC 10 µA 100VDC 5.7 All DC Electrical Characteristics are over the Recommended Operating Conditions with VCC at +5.0V +5%, unless otherwise stated. 1 2 3 For test circuit details please contact Silver Telecom Typical figures are at 25°C with nominal +5V supply and 25mA loop current, unless otherwise stated. These figures are for design aid only. Operating currents are dependant on the users application. © Silver Telecom 2005 Page 9 Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK 10.0 AC Electrical Characteristics. Characteristic 1 2 3 4 5 6 7 8 9 10 Ringing voltage: detect Ringing voltage: no detect Ringing frequency Input Impedance at VIN Output impedance at Vout Absolute voltage gain, 2 Wire to VOUT Absolute voltage gain, VIN to 2 Wire On-hook gain, 2 Wire to VOUT Relative gain, referenced to 1kHz. 2Wire - Vout, Vin - 2Wire Total harmonic distortion @ 2Wire and Vout Overload distortion @2 Wire and Vout Sym VRD FR Min Typ* 28 20 20 15 Max 14 68 100 Units Test Comments1 VRMS Hz kΩ 10 -0.5 +0.5 dB Off-hook -0.5 +0.5 dB Off-Hook -1.5 -0.5 dB -0.5 +0.5 dB 300 - 3400 Hz @0dBm, 1kHz THD 0.1 1.0 % OD 0.5 5.0 % 70 11 Common mode rejection ratio CMRR 12 Common mode overload level CMOL 250 300 VRMS 50 – 60Hz 13 Idle channel noise off-hook NC 0 12 dBrnC @2 Wire & VOUT 14 CMRR on-hook 55 dB 50-500Hz 15 CMOL on-hook 70 40 Vrms Vrms 16 Idle channel noise 17 Power supply rejection ratio at 2 Wire and Vout 18 Return loss 19 Transhybrid loss 20 Metallic to longitudinal balance 21 Polarity reversal detect pulse 22 Crosstalk 23 Leakage current, Tip or Ring to analog ground 40 NC 75 dB @+3dBm, 1kHz 50 – 500Hz VCM = 60VRMS +5V supply +3.3 supply @2 Wire & dBrnC VOUT 12.0 PSRR 25 dB Ripple 0.1V, 1kHz on VCC RL 18 dB 300-3400Hz THL 18 21 60 40 dB dB 300 - 3400Hz 500 - 2500Hz 70 70 dB 200-1000Hz 1000-4000Hz 5 30 mS >30V at T/R -70 dB 1kHz, 0dBm ILA 5 mARMS 1000V ac All AC Electrical Characteristics are over the Recommended Operating Conditions with VCC at +5.0V +5%, unless otherwise stated. *Typical figures are at 25°C with nominal 5V supply and 25mA loop current unless otherwise stated. These figures are for design aid only. 1 For test circuit details please contact Silver Telecom. © Silver Telecom 2005 Page 10 Ag2410 V1.4 February 2005 Data Sheet HIGH PERFORMANCE QUAD TRUNK 11.0 Mechanical Specification and Pin Assignation 3.5mm 75.0 mm 5.0 mm 1 28 7 Bottom View Circuit A 42.0mm Circuit B Circuit C Circuit D 54.0 mm Not To Scale 2.0mm 84 83 72 71 2.0mm NC LSC NC NC Zb NC GND 44 43 30 29 83 84 71 72 83 84 V ref RS LC V OUT V IN NC V CC V CC NC V IN V OUT LC RS V ref 11.00 mm Pin Names Bottom View 1 Circuit A 7 Pin Names Top View 7 Circuit A 1 Silver Telecom recom mends the use of 2m m sockets, especially on prototype and pre-production boards . Recom mended PCB hole diameter = 0.9 ± 0.05 mm © Silver Telecom 2005 5.0 mm 6.0mm 71 72 GND NC Zb NC NC LSC NC 58 57 Page 11 Tip (A) Ring (B) NC NC DMa DMb NC NC DMb DMa NC NC Ring (B) Tip (A)