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| MH88435-P Data Access Arrangement Preliminary Information Features * * * * * * * * * * * * * * FAX and Modem interface V.34(33k6) Externally programmable line and network balance impedances Programmable DC termination characteristics IEC950 recognised component Transformerless 2-4 Wire conversion Integral Loop Switch Dial Pulse and DTMF operation Accommodates parallel phone detection Line state detection outputs:loop current/ringing voltage/line voltage Single +5V operation, low on-hook power (35mW) Full duplex voice and data transmission On-Hook reception from the line Approvable to UL1950 Industrial temperature range available DS5132 ISSUE 8 July 1999 Package Information MH88435AD-P 28 Pin DIL Package MH88435AS-P 28 Pin SM Package 0C to +70C MH88435AS-PI 28 Pin SM Package MH88435AD-PI 28 Pin DIL Package -40C to +85C Description The Mitel MH88435 Data Access Arrangement (D.A.A.) provides a complete interface between audio or data transmission equipment and a telephone line. All functions are integrated into a single thick film hybrid module which provides high voltage isolation, very high reliability and optimum circuit design, needing a minimum of external components. The impedance and network balance are externally programmable, as are the DC termination characteristics, making the device suitable for most countries worldwide. Applications Interface to Central Office or PABX line for: * FAX/Modem (including software modems) * Electronic Point of Sale * Security System * Telemetry * Set Top Boxes Isolation Barrier VCC VBIAS AGND LC TIP RING Input Buffer & Line Termination Isolation Analog Buffer VR+ VRNB1 NB2 THL cancellation and line impedance matching circuit VX ZA RV LCD LOOP RS Network Connections User Connections OptoIsolation Logic Input Buffer Isolation VLOOP1 VLOOP2 Isolation Analog Buffer Ring & Loop Buffer Figure 1 - Functional Block Diagram 2-39 MH88435-P NB1 NB2 VR+ VRVX LC ZA AGND VCC VBIAS LOOP IC RS IC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 TIP RING IC VLOOP1 VLOOP2 IC SC SC IC NP NP IC RV LCD Preliminary Information Figure 2 - Pin Connections Pin Description Pin # 1 2 3 4 5 6 Name NB1 NB2 VR+ VRVX LC Description Network Balance 1. External passive components must be connected between this pin and NB2. Network Balance 2. External passive components must be connected between this pin and NB1. Differential Receive (Input). Analog input from modem/fax chip set. Differential Receive (Input). Analog input from modem/fax chip set. Transmit (Output). Ground referenced (AGND) output to modem/fax chip set, biased at +2.0V. Loop Control (Input). A logic 1 applied to this pin activates internal circuitry which provides a DC termination across Tip and Ring. This pin is also used for dial pulse application. Line Impedance. Connect impedance matching components from this pin to Ground (AGND). Analog Ground. 4-Wire ground. Connect to earth. Positive Supply Voltage. +5V. Internal Reference Voltage. +2.0V reference voltage. This pin should be decoupled externally to AGND, typically with a 10F 6.3V capacitor. Loop (Output). The output voltage on this pin is proportional to the line voltage across Tip - Ring, scaled down by a factor of 50. Internal Connection. No connection should be made to this pin externally. 7 8 9 10 11 12, 14, 17, 20, 23, 26 13 15 16 ZA AGND VCC VBIAS LOOP IC RS LCD RV Ringing Sensitivity. Connecting a link or resistor between this pin and LOOP (pin 11) will vary the ringing detection sensitivity of the module. Loop Condition Detect (Output). Indicates the status of loop current. Ringing Voltage Detect (Output). The RV output indicates the presence of a ringing voltage applied across the Tip and Ring leads. 2-40 Preliminary Information Pin Description (continued) 18, 19 21, 22 24 25 27 28 NP SC VLOOP2 VLOOP1 RING TIP No Pin. Isolation barrier, no pin fitted in this position. MH88435-P Short Circuit. These two pins should be connected to each other via a 0 link. Loop Voltage Control Node 2. Used to set DC termination characteristics. Loop Voltage Control Node 1. Used to set DC termination characteristics. Ring Lead. Connects to the "Ring" lead of the telephone line. Tip Lead. Connects to the "Tip" lead of the telephone line. Functional Description The device is a Data Access Arrangement (D.A.A.). It is used to correctly terminate a 2-Wire telephone line. It provides a signalling link and a 2-4 Wire line interface between an analog loop and subscriber data transmission equipment, such as Modems, Facsimiles (Fax's), Remote Meters, Electronic Point of Sale equipment and Set Top Boxes. France's current limit specification and Germany's dial pulse requirements are met by the MH88437. This device is pin for pin compatible with the MH88435. Approval specifications are regularly changing and the relevant specification should always be consulted before commencing design. Line Termination Isolation Barrier The device provides an isolation barrier capable of meeting the supplementary barrier requirements of the international standard IEC 950 and the national variants of this scheme such as EN 60950 for European applications and UL 1950 for North American applications and is classified as a Telecom Network Voltage (TNV) circuit. When Loop Control (LC) is at a logic 1, a line termination is applied across Tip and Ring. The device is off-hook and DC loop current will flow. The line termination consists of both a DC line termination and an AC input impedance. It is used to terminate an incoming call, seize the line for an outgoing call, or if it is applied and disconnected at the required rate, can be used to generate dial pulses. The DC termination is approximately 300 resistance, which is loop current dependent. It can be programmed to meet different national requirements. For normal operation Pin 22 and Pin 21 should be linked, and a resistor (R2) should be fitted between VLOOP1 and VLOOP2 as shown in Figure 5. The approval specification will give a DC mask characteristic that the equipment will need to comply to. The DC mask specifies the amount of current the DAA can source for a given voltage across tip and ring. Figure 3 shows how the voltage across tip and ring varies with different resistors (R2) for a given loop current. The AC input impedance should be set by the user to match the line impedance. External Protection Circuit An External Protection Circuit assists in preventing damage to the device and the subscriber equipment, due to over-voltage conditions. See Application Note, MSAN-154 for recommendations. Suitable Markets The MH88435 has features such as programmable input and network balance impedance, programmable DC termination and a supplementary isolation barrier that makes it ideal for use throughout the world. There are a small number of countries with a 100M leakage requirement that this device does not meet. These are Belgium, Greece, Italy, Luxembourg and Spain. 2-41 MH88435-P 30 Preliminary Information 25 20 (V(t-r) Iloop=26mA Iloop=20mA Iloop=15mA 15 10 5 0 200 600 1000 1400 1800 2200 2600 3000 3400 3800 R2(kOhms) Figure 3 - DC Programming Capabilities Input Impedance The MH88435 has a programmable input impedance set by fitting external components between the ZA pin and AGND. For complex impedances the configuration shown in Figure 4 is most commonly found. ZA R1 R2 Where the input impedance (Z) = 600R the equation can be simplified to: Zext = (10 x Z) - 1k3 Zext = 4k7 Note: A table of commonly used impedances can be found in the DAA Application's document MSAN-154. Zext = external network connected between ZA and AGND, Zint = 1.3k (internal resistance). C1 Network Balance The network balance impedance of the device can be programmed by adding external components between NB1 and NB2. For countries where the balance impedance matches the line impedance, a 15k resistor should be added between NB1 and NB2. Figure 4 - Complex Impedances To find the external programming components for configuration 4, the following formula should be used: Zext = [(10 x R1)-1k3]+ [10 x R2)//(C1/10)] Ringing Voltage Detection e.g. If the required input impedance = 220 + (820//115nF), the external network to be connected to ZA will be: Zext = 900 + (8k2//12nF) The sensitivity of the ringing voltage detection circuitry can be adjusted by applying an external resistor between the RS and LOOP pins. With a short circuit, the threshold sensitivity is ~10Vrms R7 can be calculated using the equation: 2-42 Preliminary Information R7 = 30 k x (Desired Threshold Voltage - 10Vrms) Therefore, 300k k gives ~ 20Vrms and 600k k gives ~ 30Vrms An AC ringing voltage across Tip and Ring will cause RV to output TTL pulses at the ringing frequency, with an envelope determined by the ringing cadence. MH88435-P 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 VX, biased at 2.0V. This simplifies the interface to a modem chip set. Conversely, the device converts the differential signal input at VR+ and VR- to a balanced 2-Wire signal across Tip and Ring. The device can also be used in a single ended mode at the receive input, by leaving VR+ open circuit and connecting the input signal to VR- only. Both inputs are biased at 2.0V. 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 VR+ and 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 MH88435 has the ability to transmit analog signals from Tip and Ring through to VX when onhook. This can be used when receiving caller line identification information. Parallel Phone and Dummy Ringer An external parallel phone or dummy ringer circuit can be connected across Tip and Ring as shown in Figure 5. A dummy ringer is an AC load which represents a telephone's mechanical ringer. In normal circumstances when a telephone is onhook and connected to the PSTN, its AC (Ringer) load is permanently presented to the network. This condition is used by many PTT's to test line continuity by placing a small AC current onto the line and measuring the voltage across tip (A) and ring (B). Today's telecom equipment may not have an AC load present across tip and ring (e.g. modems), therefore any testing carried out by the PTT will see an open circuit across tip and ring. In this instance the PTT assumes that the line continuity has been damaged. To overcome this problem many PTT's specify that a "Dummy Ringer" is presented to the network at all times. Ideally its impedance should be neglible in the audio band, and high at the ringing frequencies (e.g. 25Hz). Note that the requirement for the "Dummy Ringer" is country specific. Parallel phone detection is used mostly in set-top box applications. This is when a modem call will need to be disconnected from the central office by the equipment when the parallel phone is in the offhook state. This is so that a call can be made to the emergency services. To detect this state, additional circuitry will be required and can be found in the application note, MSAN-154. Transmit Gain The Transmit Gain of the MH88435 is the gain from the differential signal across Tip and Ring to the ground referenced signal at VX. The internal Transmit Gain of the device is fixed as shown in the AC Electrical Characteristics table. For the correct gain, the Input Impedance of the MH88435, must match the specified line impedance. By adding an external potential divider to VX, it is possible to reduce the overall gain in the application. The output impedance of VX is approximately 10 and the minimum resistance from VX to ground should be 2k. Example: If R3 = R4 = 2k, in Figure 5, the overall gain would reduce by 6.0dB. 2-43 MH88435-P Receive Gain The Receive Gain of the MH88435 is the gain from the differential signal at VR+ and VR- to the differential signal across Tip and Ring. The internal Receive Gain of the device is fixed as shown in the AC Electrical Characteristics table. For the correct gain, the Input Impedance of the MH88435 must match the specified line impedance. With an internal series input resistance of 47k at the VR+ and VR- pins, external series resistors can be used to reduce the overall gain. Overall Receive Gain = 0dB + 20log (47k / (47k+R5)). For differential applications R6 must be equal to R5 in Figure 5. Example: If R5 = R6 = 47k in Figure 5, the overall gain would reduce by 6.0dB. Preliminary Information Mechanical Data See Figure 12, 13 and 14 for details of the mechanical specification. Supervisory Features The device is capable of monitoring the line conditions across Tip and Ring, this is shown in Figure 5. The Loop Condition Detect pin (LCD), indicates the status of the line. The LCD output is at logic 1 when loop current flows, indicating that the MH88435 is in an off-hook state. LCD will also go high if a parallel phone goes off-hook while the DAA is on-hook. Therefore, line conditions can be determined with the LC and the LCD pins. The LOOP pin output voltage, VLoop, is proportional to the line voltage across Tip and Ring, V (t-r), scaled down by a factor of 50 and offset by VBias which is approximately 2V. With the aid of a simple external detector the LC, LCD and LOOP pins can be used to generate the signals necessary for parallel phone operation with a Set Top Box. Refer to MSAN-154. If Tip is more positive than ring VLoop < VBias If Tip is more negative than ring VLoop > VBias V (t-r) (VLoop - VBias) * 50 When the device is generating dial pulses, the LCD pin outputs TTL pulses at the same rate. The LCD output will also pulse if a parallel phone is used to pulse dial and also when ringing voltage is present at Tip and Ring. 2-44 Preliminary Information MH88435-P +5V C2 + 9 25 24 VLOOP1 VLOOP2 VCC R2 22 21 13 11 LOOP RS R7 R4 5 4 3 16 15 6 1 2 ZB R3 R5 R6 C3 C4 C5 Analog Output Analog Input Analog Input Ringing Voltage Detect Output Loop Current Detect Output Loop Control Input TIP R1 D2 D1 L2 28 TIP VX VRMH88435 VR+ RV C1 C8 L1 RING 27 LCD LC RING AGND VBIAS 10 8 C6 + ZA 7 NB1 NB2 C7 Zext = Ground (Earth) Notes: 1) R1 & C1: Dummy Ringer, country specific typically 0.39F, 250V & 3k 2) R2: DC Mask Resistor typical 360k 3) R3 & R4: Transmit Gain Resistors 2k2 4) R5 = R6: Receive Gain Resistors typically 100k 5) ZB: Network Balance Impedance 6) C2, C6 = 10F 6V 7) C7 & C8 = 39nF for 12kHz filter and 22nF for 16KHz filter. These can be left off if meter pulse filtering not required. 8) Zext: External Impedance 9) D1 Zener Diode 6V2 10) L1, L2 = 4m7H 80mA. These can be left off if meter pulse filtering not required. 11) C3, C4 & C5 = 1F coupling capacitors 12) R7 = 620k (30V RMS ringing sensitivity) 13) D2 = Teccor P3100SB Figure 5 - Typical Application Circuit 2-45 MH88435-P Preliminary Information . Absolute Maximum Ratings* - All voltages are with respect to AGND unless otherwise specified. Parameter 1 2 3 4 5 6 DC Supply Voltage Storage Temperature DC Loop Voltage Ringing Voltage Loop Current Ring Trip Current Sym VCC TS VBAT VR ILoop ITRIP Min -0.3 -55 -110 Max 6 +125 +110 150 90 180 Units V C V Vrms mA mArms 250ms 10% duty cycle or 500ms single shot VBAT = -56V Comments *Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. Recommended Operating Conditions Parameter 1 2 DC Supply Voltages Operating Temperatures Industrial Temperature Sym VCC TOP Min 4.75 0 -40 Typ 5.0 25 Max 5.25 70 +85 90 Units V Test Conditions C Vrms 3 Ringing Voltage VR 75 Typical figures are at 25C with nominal +5V supply and are for design aid only Loop Electrical Characteristics Characteristics 1 2 3 4 Ringing Voltage threshold Ringing Frequency Operating Loop Current Off-Hook DC Voltage Tip/Ring Sym VR 7 15 15 10 14 68 80 6.0 6.0 7.8 10 7 9 ON OFF 0 0 5 +2 +2 10 +4 +4 16 V Vrms Hz mA V V V A mA rms A ms ms Voltage across tip and ring Note 3 Test circuit as Fig. 4 ILoop=15mA )Note 1 ILoop=20mA )where R2 =ILoop=26mA ) 360k 100V DC Note 2. 1000V AC VBAT = -50V Min Typ Max Units Test Conditions Externally Adjustable 5 Leakage Current (Tip or Ring to AGND) Leakage Current on-hook (Tip to Ring) Dial Pulse Delay Loop Condition Detect Threshold Off-Hook 6 7 8 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. Note 1: Refer to EIA/TIA 464 section 4.1.1.4.4. Note 2: This is equivalent to 10M leakage Tip/Ring to Ground. For countries requiring 100M leakage use the MH88436 with an enhanced leakage specification. Note 3: Operation at low loop currents depends on the DC programming resistor between VLoop1/2. The recommended 360K value will support V34 operation down to 20mA. Voice operation is supported down to 15mA. 2-46 Preliminary Information Variations from Standard Loop Electrical Characteristics (MH88435AD-PI/MH88435AS-PI) Characteristics 1 2 Ringing Voltage Threshold Operating Loop Current Sym VR Min 17 22 80 Typ Max Units Vrms mA MH88435-P Test Conditions -40C to 0C -40C to 0C +70C to +85C DC Electrical Characteristics Characteristics 1 2 3 RV, LCD LC Supply Current Low Level Output Voltage High Level Output Voltage Low Level Input Voltage High Level Input Voltage Low Level Input Current High Level Input Current Sym ICC VOL VOH VIL VIH IIL IIH 2.4 0.8 2.0 Min Typ 7 Max Units mA Test Conditions VCC = 5.0V, On-hook IOL = 4mA IOH = 0.4mA 0.4 V V V V A A 0 350 10 400 VIL = 0.0V VIH = 5.0V 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 3 4 5 Input Impedance Output Impedance at VX Receive Gain (VR to 2-Wire) Frequency Response Gain (relative to Gain @ 1kHz) Signal Output Overload Level at 2-Wire at VX Signal/Noise & Distortion at 2-Wire at VX 7 Power Supply Rejection Ratio at 2-Wire at VX Transhybrid Loss 2-Wire Input Impedance Return Loss at 2-Wire (Reference 600) PSRR 25 25 THL Zin RL 14 20 18 20 24 24 dB dB dB 16 40 40 25 Note 3 dB dB dB SINAD Sym VRVR+ Min Typ 47k 94k 10 Max Units Test Conditions -1 -0.5 -0.5 0 +0.4 0 0 0 70 70 1 +0.5 +0.5 dB dB dB dBm dBm dB dB Test circuit as Fig. 8 Input 0.5V at 1kHz 300Hz 3400Hz THD < 5% @ 1kHz ILOOP = 25-75mA Input 0.5V at 1kHz 6 ILOOP = 25-75mA 300-3400Hz Ripple 0.1Vrms 1kHz on VCC Test circuit as Fig.8 300-3400Hz at VR @1kHz Test circuit as Fig. 9 200-500Hz 500-2500Hz 2500-3400Hz 8 9 10 2-47 MH88435-P AC Electrical Characteristics Characteristics 11 Longitudinal to Metallic Balance 46 46 Metallic to Longitudinal Balance 60 40 12 Idle Channel Noise at 2-Wire at VX at 2-Wire at VX 13 Transmit Gain (2-Wire to VX) (Terminated gain) Off-Hook (Voltage gain) 14 15 On-Hook -1 -1 IMD Preliminary Information Sym Min Typ 65 65 68 62 10 10 -80 -80 Max Units dB dB dB dB Test Conditions Test circuit as Fig. 10 300-1000Hz 1000-3400Hz Test circuit as Fig.11 200-1000Hz 1000-4000Hz Cmess filter 300-3400Hz filter Test circuit as Fig. 7 Input 0.5V @ 1kHz LC = 0V 300Hz 3400Hz ILOOP = 25-75mA F1 = 1kHz at -6dBm F2 = 800Hz at -6dBm Total signal power = -3dBm ILOOP = 25-75mA F1 = 1kHz at -6dBm F2 = 800Hz at -6dBm Total signal power = -3dBm Test circuit as Fig. 10 1-100Hz. Note 4 Test circuit as Fig. 10. Note 4 Nc 20 20 dBrnC dBrnC dBm dBm dB dB +1 +1 dB dB dB -1 0 0 +0.3 +0.2 60 +1 Frequency Response Gain (relative to Gain @ 1kHz) Intermodulation Distortion products at VX and 2W 16 Distortion at VX due to near end echo (300Hz - 3400Hz bandwidth) 75 dB 17 18 Common Mode Rejection on 2 wire at VX Common Mode overload level CMRR CMOL 56 7 dB Vrms Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. Typical figures are at 25C with nominal +5V and are for design aid only. 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: These parameters need to be taken into consideration when designing or specifying the power supply. Variations from Standard AC Electrical Characteristics (MH88437AD-PI/MH88437AS-PI) (-40C to 0C) Characteristics 1 Frequency Response Gain Sym Min Typ -0.6 -0.65 Max Units dB Test Conditions 300Hz (-40C to 0C) 2-48 Preliminary Information MH88435-P 11 3 4 5 21 22 LOOP VR+ VRMH88435 VX SC SC RING 360K 24 25 VLOOP2 10 VBIAS VLOOP1 LC RV AGND VCC ZA 9 7 6 16 8 4.7K 10uF 27 NB2 2 13 RS 15 LCD 28 TIP NB1 1 15K ILOOP 1K = Ground (Earth) 5V 5V Figure 6 - Test Circuit 1 -V 10H 500 100uF I=20mA + 11 = Ground (Earth) 3 4 5 21 22 LOOP VR+ VR- 13 RS 15 LCD 28 TIP NB1 1 15K NB2 2 MH88435 VX SC SC RING 27 Vs Impedance = Zin 100uF + 10H 500 10uF 360K 24 25 VLOOP2 10 VBIAS VLOOP1 LC RV AGND VCC ZA 7 9 6 16 8 4.7K 1K 5V 5V Gain = [20 * Log (VX / Vs)] + 6.02 dB Figure 7 - Test Circuit 2 2-49 MH88435-P -V = Ground (Earth) 11 LOOP 3 VR+ Vs 4 5 21 22 VRMH88435 VX SC SC RING 360K 24 25 VLOOP2 10 VBIAS VLOOP1 LC RV AGND VCC ZA 9 6 16 8 7 4.7K 10uF 27 NB2 2 15K 13 RS 15 LCD 28 TIP NB1 1 Preliminary Information 10H 500 I=20mA 100uF + Zin 100uF + 10H 500 1K 5V 5V Gain = 20 * Log (V(Zin) / Vs) Figure 8 - Test Circuit 3 -V = Ground (Earth) 11 LOOP 3 VR+ 4 5 21 22 VRMH88435 VX SC SC RING 360K 24 25 VLOOP2 10 VBIAS VLOOP1 LC RV AGND VCC ZA 9 6 16 8 7 4.7K 10uF 27 10H 500 + NB2 2 300 100uF 15K 13 RS 15 LCD 28 TIP NB1 1 V1 300 Vs = 0.5V 10H 500 I=20mA 100uF + Zin 1K 5V 5V Return Loss = 20 * Log (2V1 / Vs) Figure 9 - Test Circuit 4 2-50 Preliminary Information MH88435-P -V = Ground (Earth) 11 3 4 5 21 22 LOOP VR+ VRMH88435 VX SC SC RING 360K 24 25 VLOOP2 VLOOP1 LC RV AGND VCC ZA 9 7 6 16 8 4.7K VBIAS 10 10uF 27 V2 NB2 2 15K 13 RS 15 LCD 28 TIP NB1 1 10H 500 I=20mA 100uF + 300 V1 300 100uF + 10H 500 Vs = 0.5V 1K 5V 5V Long. to Met. Balance = 20 * Log (V1 / Vs) CMR = 20 * Log (VX / Vs) CMOL = V2 Figure 10 - Test Circuit 5 -V = Ground (Earth) 10H 500 11 3 4 5 LOOP VR+ VRMH88435 VX NB2 2 300 SC RING 360K 24 25 VLOOP2 10 VBIAS VLOOP1 LC RV AGND VCC ZA 9 7 6 16 8 4.7K 10uF 27 + 10H 500 100uF 510 V1 15K Vs 13 RS 15 LCD 28 TIP NB1 1 300 I=20mA 100uF + 21 SC 22 1K 5V 5V Met. to Long. Balance = 20 * Log (V1 / Vs) Figure 11 - Test Circuit 6 2-51 MH88435-P Preliminary Information 0.162 Max (4.12 Max) 0.27 Max (6.9 Max) 0.08 Typ (2 Typ) 1.00 Typ * (25.4 Typ) 1.05 Max (26.7 Max) * 0.100+0.010 (2.54+0.25) 0.020 + 0.005 (0.5 + 0.13) 0.063 Max (1.6 Max) 0.260+0.015 (6.6+0.38) * 0.05 Typ (1.27 Typ) * 0.300+0.010 (7.62+0.25) 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 260C for 10 secs. * Dimensions to centre of pin. 1 1.42 Max (36.1 Max) Figure 12 - Mechanical Data for 28 Pin DIL Hybrid 0.162 Max (4.11 Max) 0.287 Max (7.29 Max) 0.063 Max (1.6 Max) 0.99 Typ (25.15 Typ) 0.110+0.015 (2.80+0.38) * 0.100+0.010 (2.54+0.25) 0.020 + 0.005 (0.5 + 0.13) *0.300+0.010 (7.62+0.25) * 0.05 Typ (1.27 Typ) 0.060 Typ (1.52 Typ) Notes: 1) Not to scale 2) Dimensions in inches. (Dimensions in millimetres) 3) Pin tolerances are non-accumulative. 4) Recommended soldering conditions: Max reflow temp: 220C for 10 secs. * Dimensions to centre of pin. 1.42 Max (36.1 Max) 1.15 Max (29.2 Max) 1 Figure 13 - Mechanical Data for 28 Pin Surface Mount Hybrid 2-52 Preliminary Information MH88435-P 0.10 (2.54) * 0.26 (6.60) 0.10 (2.54) 0.99 (25.15) 0.04 (1.02) Notes: 1) Not to scale 2) Dimensions in inches. (Dimensions in millimetres) 3) All dimensions are Typical except where marked with an .This gap is associated with the isolation barrier. 0.06 (1.52) Figure 14 - Recommended Footprint for 28 Pin Surface Mount Hybrid 2-53 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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