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| (R) MH88632B Central Office Interface Circuit Preliminary Information Features * * * * * * * * Supports Loop Start and Ground Start protocols 2-4 Wire conversion Programmable Input Impedance, Network Balance Impedance and gains Three relay drivers Line state detection outputs 15mA operation allowing long line length capability On-hook reception for Caller Line Identification Meets FCC Part 68 Leakage Current Requirements ISSUE 3 September 1997 Ordering Information MH88632B 40 Pin SIL Package MH88632BT 40 Pin 90 Package 0C to 70C Description The Mitel MH88632B Central Office Interface Circuit provides a complete analog and signalling link between audio switching equipment and a subscriber line. The device is available in a single in line package for high packing densities or in a 90 package for reduced card clearance. The device is fabricated using thick film hybrid technology for optimum circuit design and very high reliability. Applications Interface to Central Office telephone line for * * * * * PBX Key Telephone System Terminal Equipment Digital Loop Carrier Wireless Local Loop RV FL RL RG TG VCC VEE AGND GRD GRC BRD BRC LRD LRC Status Detection VRLY Relay Driver Circuit RGND RING Line Termination 2-4 Wire Hybrid Receive Gain Dummy Ringer RX GRX1 GRX0 Transmit Gain TIP Network Balance TX GTX1 GTX0 Impedance Matching XLA XLB XLC XLD Z1 Z2 Z600 Z900 NS N1 N2 NATT Figure 1 - Functional Block Diagram 2-239 MH88632B Preliminary Information TIP RING XLA XLB XLC XLD IC GRD IC IC RGND VRLY LRD BRD LRC BRC GRC AGND NATT N1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 N2 Z900 Z1 Z2 TX RX GTX0 GTX1 GRX0 GRX1 IC Z600 NS TG RL RV FL RG VEE VCC 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Figure 2 - Pin Connections Pin Description Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Name TIP RING XLA XLB XLC XLD IC GRD IC IC RGND VRLY LRD BRD LRC Description Tip Lead. Connects to the Tip lead of a telephone line usually via an external protection circuit. Ring Lead. Connects to the Ring lead of a telephone line usually via an external protection circuit. Loop Relay Contact A. Connects to XLB through relay contacts (K1A) when the relay is energized. Loop Relay Contact B. Connects to XLA through relay contacts (K1A) when the relay is energized. Loop Relay Contact C. Connects to XLD through relay contacts (K1B) when the relay is energized. Loop Relay Contact D. Connects to XLC through relay contacts (K1B) when the relay is energized. Internal Connection. No connection should be made to this pin. Ground Ring Lead Relay Drive (Output). Connects to the Ground Ring Lead Relay coil (K3) and is controlled by GRC. Internal Connection. No connection should be made to this pin. Internal Connection. No connection should be made to this pin. Relay Ground. Return path for relay supply voltage. Relay Positive Supply Voltage. Normally +5V. Connects to all relay coils and the relay supply voltage. Loop Relay Drive (Output). Connects to the Loop Relay coil (K1) and is controlled by LRC. Bias Relay Drive (Output). Connects to the Bias Relay coil (K2) and is controlled by BRC. Loop Relay Control (Input). A logic 1 activates LRD. The Loop Relay (K1) is used for placing the Line Termination across Tip and Ring. 2-240 Preliminary Information Pin Description (continued) 16 BRC MH88632B Bias Relay Control (Input). A logic 1 activates BRD. The Bias Relay (K2) is used to connect Tip and Ring to -48V via bias resistors. This input should be connected to logic 0 when not used. Ground Ring Relay Control (Input). A logic 0 activates GRD. The Ground Ring Lead Relay (K3) is used to connect Ring to AGND via a bias resistor. This input should be connected to logic 1 when not used. Analog Ground. 4-Wire Ground. Normally connects to system ground. This pin must be connected to the system ground in Ground Start applications. Network Balance AT&T Node. Used when setting the Network Balance Impedance to AT&T compromise network. Network Balance Node 1. Used when a Network Balance Impedance which differs from the Input Impedance is required or when NATT is used. Network Balance Node 2. Used when a Network Balance Impedance which differs from the Input Impedance is required. Input Impedance 900 Node. Connects to Z1 when selecting an Input Impedance of 900. Input Impedance Node 1. Used when setting the Input Impedance. Input Impedance Node 2. Used when a user defined Input Impedance is required. Transmit (Output). 4-Wire ground (AGND) referenced analog output. Receive (Input). 4-Wire ground (AGND) referenced analog input. Transmit Gain Node 0. Connects to GTX1 for 0dB transmit gain. Transmit Gain Node 1. Connects to GTX0 for 0dB transmit gain or via a resistor to AGND for transmit gain programming. Receive Gain Node 0. Connects to GRX1 for 0dB receive gain. Receive Gain Node 1. Connects to GRX0 for 0dB receive gain or via a resistor to AGND for receive gain programming. Internal Connection. No connection should be made to this pin. Loop Impedance 600 Node. Connects to Z1 when selecting an Input Impedance of 600. Network Balance Setting (Input). Used to select the Network Balance impedance. Tip Lead Ground Detect (Output). A logic 0 output indicates that the Tip lead is at ground (AGND) potential. Reverse Loop Detect (Output). In the on-hook state, a logic 0 output indicates that reverse loop battery is present. In the off-hook state, a logic 0 output indicates that reverse loop current is present. Ringing Voltage Detect (Output). A logic low indicates that ringing voltage is across the Tip and Ring leads. Forward Loop Detect (Output). In the on-hook state, a logic 0 output indicates that forward loop battery is present. In the off-hook state, a logic 0 output indicates that forward loop current is present. Ring Lead Ground Detect (Output). A logic 0 output indicates that the Ring lead is at ground (AGND) potential. Negative Supply Voltage. -5V DC Positive Supply Voltage. +5V DC 17 GRC 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 AGND NATT N1 N2 Z900 Z1 Z2 TX RX GTX0 GTX1 GRX0 GRX1 IC Z600 NS TG RL 36 37 RV FL 38 39 40 RG VEE VCC 2-241 MH88632B Functional Description The MH88632B is a Central Office Interface Circuit (COIC). It is used to correctly terminate a Central Office 2-Wire telephone line. The device provides a signalling link and a 2-4 Wire line interface between the telephone line and subscriber equipment. The subscriber equipment can include Private Branch Exchanges (PBX's), Key Telephone Systems, Terminal Equipment, Digital Loop Carriers and Wireless Local Loops. All descriptions assume that the device is connected as in the application circuit shown in Figure 3. Preliminary Information at a logic 0, the Line Termination is removed from across Tip and Ring. An internal Dummy Ringer is permanently connected across Tip and Ring which is a series AC load of (17k+330nF). This represents a mechanical telephone ringer and allows ringing voltages to be sensed. This load can be considered negligible when the line has been terminated. Depending on the Network Protocol being used the line termination can seize the line for an outgoing call, terminate an incoming call, or if applied and disconnected at the correct rate can be used to generate dial pulse signals. The DC line termination circuitry provides the line with an active DC load which is equivalent to a DC resistance of between 190 and 290 dependant on the loop current. Isolation Barrier The MH88632B provides an isolation barrier which is designed to meet FCC Part 68 (November 1987) Leakage Current Requirements. AC Input Impedance External Protection An external protection circuit may be required to assist in preventing overvoltage damage to the device and the subscriber equipment in which it is incorporated. The type of protection required is dependant on the application and the regulatory standards. Please contact the governing regulatory body and local approvals testing houses for more assistance. This protection is shown in block form in Figure 3. The Input Impedance (Zin) is the AC impedance that the MH88632B places across Tip and Ring in order to terminate the telephone line. It can be user defined, set to 600 or set to 900. To select a 600 Input Impedance, Z1 should be connected directly to Z600. No connection should be made to Z2 or Z900. To select a 900 Input Impedance, Z1 should be connected directly to Z900. No connection should be made to Z2 or Z600. In order to user define the Input Impedance an impedance network should be placed between Z1 and Z2. This should be equivalent to 10 times the required Input Impedance and must be greater than 100 at 3.4kHz. No connection should be made to Z600 or Z900. For example, to implement an Input Impedance of 220+(820//115nF) an impedance network of 2200+(8200//11.5nF) should be connected between Z1 and Z2 as shown below. 2200 Z1 8200 Suitable Markets The programmability offered by the MH88632B enhances its suitability for use throughout the world. However, care should be taken that all regulatory requirements, e.g. isolation and DC termination, are being fulfilled for the particular application in which the device is intended to be used. Line Termination When LRC is at a logic 1, LRD is taken to a logic 0 which energizes the Loop Relay (K1), connecting XLA to XLB and XLC to XLD. This places a line termination across Tip and Ring. The device can be considered to be in an off-hook state and DC loop current will flow. The line termination consists of a DC resistance and an AC impedance. When LRC is Z2 11.5nF 2-242 Preliminary Information User defined Input Impedances can be used to satisfy most national requirements. See Table 1. All connections should be kept as short as possible. MH88632B The 4-Wire side (TX and RX) can be interfaced to a filter/codec, such as the Mitel MT896X, for use in digital voice switched systems. During full duplex transmission, the signal at 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 RX, being sent to the line, must not appear at the output TX. In order to prevent this, the device has an internal cancellation circuit. The measure of attenuation is Transhybrid Loss (THL). Network Balance Impedance The MH88632B's Network Balance Impedance can be selected to mirror the Input Impedance, to be AT&T compromise or set to a user defined value. Thus, the Network Balance Impedance can comply with most national requirements. With NS at logic 0, the Network Balance Impedance is selected to mirror the Input Impedance of the device. No connection should be made to NATT, N1 and N2. To select a Network Balance Impedance equal to AT&T Compromise (i.e. 350+(1k//210nF) ), NS should be set to a logic 1 and a direct connection made between NATT and N1. No connection should be made to N2. To set a user defined Network Balance Impedance NS is set to a logic 1. An impedance network which is 10 times the required Network Balance Impedance must be placed between N1 and AGND. Another impedance network must be placed between N1 and N2 which is 10 times the selected input impedance of the device. For example, to implement a Network Balance Impedance of 220+(820//115nF), an impedance network of 2200+(8200//11.5nF) must be connected between N1 and AGND. An impedance network equal to 10 times the selected Input Impedance must be connected between N1 and N2. See Table 2. All connections should be kept as short as possible. Programmable Transmit and Receive Gain The Transmit Gain (GTX) of the MH88632B is the gain from the balanced signal across Tip and Ring to the ground referenced signal at TX. It is programmed by making a connection to GTX1. A direct connection from GTX1 to GTX0 selects a gain of 0dB. A direct connection from GTX1 to AGND selects a gain of +6dB. Other gains can be programmed by connecting a resistor (RTX) between GTX1 and AGND. The value of resistor is selected using the following formulae. RTX = 10 5000 (-GTX/20) - 0.5 GTX = - 20 log(0.5+5000) RTX The Receive Gain (GRX) of the MH88632B is the gain from the ground referenced signal at RX to the balanced signal across Tip and Ring. It is programmed by making a connection to GRX1. A direct connection from GRX1 to GRX0 selects a gain of 0dB. A direct connection from GRX1 to AGND selects a gain of +6dB. Other gains can be programmed by connecting a resistor (RRX) between GRX1 and AGND. The value of resistor is selected using the following formulae. RRX = 5000 10(-GRX/20) - 0.5 2-4 Wire Conversion The device converts the balanced 2-Wire input, presented by the line at Tip and Ring, to a ground referenced signal at TX. This circuit operates with or without loop current; signal reception with no loop current is required for on-hook reception enabling the detection of Caller Line Identification signals. Conversely the device converts the ground referenced signal input at RX, to a balanced 2-Wire signal across Tip and Ring. GRX = -20 log(0.5+5000) RRX For the correct programming of Transmit and Receive Gains the selected Input Impedance must match the specified telephone line characteristic impedance. 2-243 MH88632B Both Gains are programmable in the range -12dB to +6dB. This wide range is capable of accommodating most system loss plans. See Tables 3 and 4. Preliminary Information 3. Tip Ground and Ring Ground Detect Outputs (TG & RG) The TG output provides a logic 0 when the Tip pin is at ground (AGND) potential. The RG output provides a logic 0 when the Ring pin is at ground (AGND) potential. Control Inputs The MH88632B accepts control signals from the system controller at the inputs Loop Relay Control (LRC), Bias Relay Control (BRC) and Ground Ring Relay Control (GRC). These energize the relay drive outputs Loop Relay Drive (LRD), Bias Relay Drive (BRD) and Ground Ring Relay Drive (GRD) respectively. Each output is active low and has an internal clamp diode to VRLY. The intended use of each of these relay drivers is shown in Figure 3. LRC is being used to add and remove the Line Termination from across Tip and Ring. BRC is used to connect Tip and Ring to -48V via external bias resistors. GRC is controlling the connection of Ring to AGND via an external bias resistor. If these Control Features and the Supervisory Features are used as intended they can be used to implement common Network Protocols such as Loop-Start Signalling and Ground-Start Signalling. Caller Line Identification Caller Line Identification (CLI) provides the called party with the calling party telephone number. The Central Office will utilise the voice path of a regular loop-start telephone line when the MH88632B is in the on-hook state. The CLI information is typically a Frequency Shift Keyed (FSK) data signal which is output at TX. Supervisory Features Line Status Detection Outputs The MH88632B supervisory circuitry provides the signalling status outputs which are monitored by the system controller. The supervisory circuitry is capable of detecting: ringing voltage; forward and reverse loop battery; forward and reverse loop current; grounded tip lead; and grounded ring lead. If these Supervisory Features and the Control Features are used as indicated in Figure 3 they can implement common Network Protocols such as Loop-Start Signalling and Ground-Start Signalling. 1. Ringing Voltage Detect Output (RV) The RV output provides a logic 0 when ringing voltage is detected across Tip and Ring. This detector includes a filter which ensures that the output toggles at the ringing cadence and not at the ringing frequency. Typically this output switches to a logic 0 after 50ms of applied ringing voltage and remains at a logic 0 for 50ms after ringing voltage is removed. 2. Forward Loop and Reverse Loop Detect Outputs (FL & RL) The FL output provides a logic 0 when either forward loop battery or forward loop current is detected, that is the Ring pin voltage is negative with respect to Tip pin voltage. The RL output provides a logic 0 when either reverse loop battery or reverse loop current is detected, that is the Tip pin voltage is negative with respect to Ring pin voltage. Mechanical Information See Figure 9 for mechanical specifications for the MH88632B and Figure 10 for mechanical specifications for the MH88632BT. 2-244 Preliminary Information MH88632B R1 R2 K2A K2B 48V Battery MH88632B Tip Ring Protection Circuit 1 2 40 28 RING GTX1 GTX0 +5V K1 K2 K3 12 11 15 LRC 16 Bias Relay Control 17 Ground Relay Control K1A 3 4 K1B GRC XLA XLB TG RL RV FL RG XLD AGND 18 C2 VEE 39 38 34 35 36 BRC NS 33 VRLY RGND Z1 Z600 13 14 8 LRD BRD GRD TX GRX1 GRX0 RX 27 25 30 29 26 23 32 +5V C1 TIP VCC R3 K3 Analog Out Analog In Loop relay Control Tip Ground Detect Reverse Loop Detect Ringing Voltage Detect 5 XLC 6 37 Forward Loop Detect Ring Ground Detect NOTES: 1) Configured for 0dB Gain, 600 Input Impedance and 600 Network Balan ce Impedance 2) K1, K2 are E/M FORM C 3) K3 is E/M 1 FORM C 4) R1 = R2 = 30.9k, 1%, 5W 5) R3 = 470, 5%, 5W 6) K2, K3, R1, R2, R3 are required for Ground Start only 7) C1, C2 are decoupling capacitors -5V Figure 3 - Typical Combined Loop Start and Ground Start Appliation Circuit 2-245 MH88632B Input Impedance Settings Z2 NA NA Z1 Z600 Z900 NA Connect Z1 to Z900 NA Preliminary Information Resulting input impedance (Zin) 600 900 0.1 x impedance between Z1 & Z2 Connect Z1 to Z600 Connect Z1 NA to Z900 Connect network from Z1 to Z2 NA Note: NA indicates high impedance (10k) connection to this pin does not effect the resulting Input Impedance Network Balance Settings NS (Input) Low High High N2 NA NA N1 NATT Resulting input impedance (Zin) Equivalent to Zin AT&T compromise (350 + 1k // 210nF) Zin must be 600 0.1 x impedance between N1 & N2 NA NA Connect N1 to NATT NA Connect network from N1 to AGND equivalent to 10 x NETBAL. Connect network from N1 to N2 equivalent to 10 x Zin. Notes: NA indicates high impedance (10k) connection to this pin does not effect the resulting Network Balance Impedance. Low indicates Logic 0. High indicates Logic 1. Transmit Gain Programming Transmit Gain (dB) +6.0 +4.0 +3.7 0.0 -3.0 -6.0 -12.0 RTX Resistor Value () No Resistor 38.3k 32.4k GTX0 to GTX1 5.49k 3.32k 1.43k Notes Results in 0dB overall gain when used with Mitel A-law codec (i.e. MT8967) Results in 0dB overall gain when used with Mitel -law codec (i.e. MT8966) Note: Overall gain refers to the receive path of PCM to 2-Wire. Receive Gain Programming Receive Gain (dB) +6.0 0.0 -3.0 -3.7 -4.0 -6.0 -12.0 RRX Resistor Value () No Resistor GRX0 to GRX1 5.49k 4.87k 4.64k 3.32k 1.43k Notes Results in 0dB overall gain when used with Mitel A-law codec (i.e. MT8967) Results in 0dB overall gain when used with Mitel -law codec (i.e. MT8966) Note: Overall gain refers to the transmit path of 2-wire to PCM. 2-246 Preliminary Information Absolute Maximum Ratings* Parameter 1 2 3 4 DC Supply Voltage DC Relay Voltage Storage Temperature Ring Trip Current Sym VCC VEE VRLY TS ITRIP MH88632B * Min -0.3 0.3 -0.3 -55 Max 7 -7 20 +125 180 Units V V V C mArms Comments 250ms 10% duty cycle or 500ms single shot *Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. Recommended Operating Conditions Parameter 1 2 3 DC Supply Voltage DC Relay Voltage Operating Temperature Sym VCC VEE VRLY TOP Min 4.75 -4.75 0 Typ 5 -5 5 25 Max 5.25 -5.25 15 70 Units V V V C Comments Typical figures are at 25 C with nominal 5V supplies and are for design aid only. DC Electrical Characteristics Characteristics 1 2 3 Supply Current Power Consumption Low Level Output Voltage High Level Output Voltage Sym IDD IEE PC Min Typ 14 10 120 Max 15 13 147 0.5 Units mA mA mW V V Test Conditions FL RL RG TG RV 4 LRD BRD GRD 5 NS LRC BRC GRC 6 NS LRC BRC GRC VOL VOH 2.4 IOL = 4mA IOH = 0.4mA Sink Current, Relay to VCC Clamp Diode Current Low Level Input Voltage High Level Input Voltage IOL ICD VIL VIH 100 150 0.8 2 mA mA V V VOL = 0.35V High Level Input Current Low Level Input Current IIH IIL 1 1 A A Electrical Characteristics are over recommended operating conditions unless otherwise stated. Typical figures are at 25C with nominal 5V supplies and are for design aid only. 2-247 MH88632B Loop Electrical Characteristics Characteristics 1 2 4 5 6 7 Ringing Voltage Ringing Frequency Operating Loop Current Off-Hook DC Resistance Leakage Current (Tip-Ring to AGND) FL Threshold Tip-Ring Voltage Detect (On-hook) Tip-Ring Current Detect (Off-hook) RL Threshold Tip-Ring Voltage Detect (On-hook) Tip-Ring Current Detect (Off-hook) TG and RG Detect Threshold Sym VR Min 20 17 15 190 Typ 90 20 275 Max 130 68 90 290 7 Preliminary Information Units Vrms Hz mA mArms Test Conditions @1000VAC 12 6 -12 -6 -12 21 12 -21 -12 -14 V mA V mA V LRC = 0V LRC = 5V LRC = 0V LRC = 5V 8 9 |Electrical Characteristics are over recommended operating conditions unless otherwise stated. Typical figures are at 25C with nominal 5V supplies and are for design aid only. AC Electrical Characteristics Characteristics 1 2-wire Input Impedance Note 1 2 Return Loss at 2-Wire (Zin = 600) RL Sym Zin Min Typ 600 900 Ext. Max Units dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB k dB dB Test Conditions 3 Return Loss at 2-Wire (Zin = 900) Longitudinal to Metallic Balance RL 20 26 20 22 26 24 58 58 55 53 51 60 40 18 21 18 21 18 21 40 48 46 4 Note 2 5 Metallic to Longitudinal Balance Note 2 6 7 8 9 10 11 Transhybrid Loss (Zin = Net = 600) Note 2 & 3 Transhybrid Loss (Zin = Net = 900) Note 2 & 3 Transhybrid Loss (Zin =600, Net = AT&T) Note 2 & 3 Input Impedance At RX Output Impedance at TX Transmit Gain, (2-Wire/TX): Default Gain(0dB) Programmable Range THL THL THL 64 63 61 57 54 62 62 25 33 Test Circuit Fig. 6 200-500 Hz 500-1000 Hz 1000-3400 Hz 200-500 Hz 500-1000 Hz 1000-3400 Hz Test Circuit Fig. 8 200 Hz 1000 Hz 2000 Hz 3000 Hz 4000 Hz Test Circuit Fig. 7 200-1000 Hz 1000 -4000 Hz 200-3400 Hz 500-2500 Hz 200-3400 Hz 500 -2500 Hz 200-3400 Hz 500-2500 Hz 30 10 5 -0.2 -12 0 0.2 6 Test Circuit Fig. 5 Input 0.5V 1000Hz 1000Hz 2-248 Preliminary Information AC Electrical Characteristics (continued) Characteristics 12 Frequency response gain (relative to gain at 1kHz) Note 2 -1.3 -0.3 -0.3 -0.7 0 0 0 0 0.1 0.1 0.1 0.1 dB dB dB dB Sym Min Typ Max Units MH88632B Test Conditions Test Circuit Fig. 5 Input 0.5V 200 Hz 300 Hz 3000 Hz 3400 Hz Test Circuit Fig. 4 Input 0.5V 1000Hz 1000Hz Test Circuit Fig. 4 Input 0.5V 200 Hz 300 Hz 3000 Hz 3400 Hz THD < 5% Ref. 600 Ref. 600 Input 0.5V, 1kHz 13 Receive Gain, (RX/2-Wire): Default Gain (0dB) Programmable Range Frequency response gain (relative to gain at 1kHz) Note 2 -0.2 -12 0 0.2 6 dB dB 14 -1.3 -0.3 -0.3 -0.7 4 4 THD 0 0 0 0 0.1 0.1 0.1 0.1 dB dB dB dB dBm dBm 15 Signal Output Overload Level at 2-wire at TX 16 Total Harmonic Distortion at 2-Wire at TX 0.2 0.4 Nc 10 11 1 1 13 13 % % dBrn C dBrn C dB 17 Idle Channel Noise at 2-Wire at TX 18 19 Common Mode Rejection Ratio Power Supply Rejection Ratio at 2-Wire and TX VCC CMRR PSRR 48 65 540Hz Test Circuit Fig. 8 Ripple 0.1V, 1kHz VEE 20 On-Hook Transmit Gain (2-Wire/TX) Default Gain 0dB Programmable Range On-Hook frequency Response Gain (relative to off-hook gain) 20 20 -1 -12 -1 42 28 0 1 6 1 dB dB dB dB dB 1000Hz 1000Hz Input 0.5V, 1kHz 21 0 |Electrical Characteristics are over recommended operating conditions unless otherwise stated Typical figure are at 25C with nominal 5V supplies and are for design aid only *All test conditions use a test source impedance which matches the device's input impedance dBm is referenced to 600 unless otherwise stated Notes: Impedance set by external network equal to 10 times the required input impedance Test conditions use a transmit and receive gain set to 0dB default "Net" indicates network balance impedance 2-249 MH88632B +5V -5V -V Preliminary Information 10H 650 VCC Z1 Z600 GRX0 XLA GRX1 XLB GTX0 XLC GTX1 TX + RX NS AGND TIP 100F 10H 650 Gain = 20 x Log (Vtx/Vs) XLD RING I = 15mA VEE 100F + ~ Vs = 0.5V 600 Figure 4 - 2-4 Wire Gain Test Circuit +5V -5V -V 10H 650 VCC Z1 Z600 GRX0 XLA GRX1 XLB GTX0 XLC GTX1 TX + RX Vs = 0.5V TIP NS AGND 100uF 10H 650 XLD Z = 600 RING I = 15mA VEE 100F + ~ Gain = 20 x Log (Vz/Vs) Figure 5 - 4-2 Wire Test Circuit 2-250 Preliminary Information MH88632B -V +5V -5V 10H 650 VCC Z1 Z600 GRX0 XLA GRX1 XLB GTX0 XLC GTX1 TX + RX NS AGND TIP 100F 10H 650 Return Loss = 20 x Log (V1\Vs) XLD 368 Vs = 0.5V V1 RING I = 15mA VEE 100F + 368 600 ~ Figure 6 - Return Loss Test Circuit +5V -5V -V 10H 650 VCC Z1 Z600 GRX0 XLA GRX1 XLB GTX0 XLC GTX1 TX + RX NS AGND TIP 100F 10H 650 Met to Long. Balance = 20 x Log (V1/Vs) XLD 510 V1 368 RING I = 15mA VEE 100F + 368 ~ Vs = 0.5V Figure 7 - Metallic to Longitudinal Balance Test Circuit 2-251 MH88632B Preliminary Information +5V -5V -V 10H 650 VCC Z1 Z600 GRX0 XLA GRX1 XLB GTX0 XLC GTX1 TX + RX NS AGND TIP 100F 10H 650 Long. to Met. Balance = 20 * Log (V1/Vs) CMRR = 20 * Log (Vtx/Vs) 368 XLD V1 Vs = 0.5V RING I = 15mA VEE 100F + 368 ~ Figure 8 - Longitudinal to Metallic Balance and CMRR Test Circuit 4.23 Max (107.5 Max) 1 0.125 Max (3.18 Max) 0.125 Max (3.18 Max) 0.64 +0.02 (16.25 +5.1) 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 at pins 260 for 10 secs. * Dimensions to centre of pin. * 0.100 +0.010 (2.54 +0.25) 1 0.180 +0.020 (4.57 +0.51) * 0.250 +0.020 (6.35 +0.51) 0.020 +0.005 (0.5 +0.13) 0.010 +0.002 (0.25 +0.05) Figure 9 - MH88632B Mechanical Information 2-252 Preliminary Information MH88632B 4.23 Max (107.5 Max) 0.62 Max (15.75 Max) 1 0.080 +0.020 (2.03 +0.51) 0.170 Max (4.32 Max) 0.080 Max (2.03 Max) Notes: 1) No t to scale 2) Dimensions in inches. (Dimensions in millimetres) 3) Pin tolerances are non-accumulative. 4) Recommended soldering conditions: Wave Soldering Max temp at pins 260 for 10 secs. * Dimensions to centre of pin. * 0.250 +0.020 (6.35 +0.51) * 0.100 +0.010 (2.54 +0.25) 0.260 +0.015 (6.60 +0.38) 0.020 +0.005 (0.51 +0.13) Figure 10 - MH88632BT Mechanical Information 2-253 MH88632B Notes: Preliminary Information 2-254 http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively "Mitel") is believed to be reliable. However, Mitel 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 Mitel or licensed from third parties by Mitel, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Mitel, or non-Mitel furnished goods or services may infringe patents or other intellectual property rights owned by Mitel. This publication is issued to provide information only and (unless agreed by Mitel 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 Mitel 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 Mitel's conditions of sale which are available on request. M Mitel (design) and ST-BUS are registered trademarks of MITEL Corporation Mitel Semiconductor is an ISO 9001 Registered Company Copyright 1999 MITEL Corporation All Rights Reserved Printed in CANADA TECHNICAL DOCUMENTATION - NOT FOR RESALE |
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