MH88617 Programmable SLIC with Ringing Amplification Advance Information Features • • • • • • • • • • • • • DS5037 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 MH88617AV-PI 21PIN SIL Package MH88617AD-PI 28PIN DIL Package MH88617AS-PI 28PIN SM Package MH88617AT-PI 21PIN 90° L/F Package -40°C to 85°C Description The Mitel 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. Line interface for: • PABX/Key Telephone System • Analog Terminal Adaptors • Pair Gain System • Fibre in the Loop/Wireless Local Loop VCC VEE GND LCA Power Management May 1999 Ordering Information Applications VBAT ISSUE 4 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. LR Reversal GVX TIP TIP / RING Gain Adjust & Programmable Network Balance Constant Current Control 2 - 4 Wire Drive and VR Conversion Sense RING Supervision Ringing Control and Amplifier RC RV DCRI VX Metering Injection Auto Ring Trip SHK ESI ESE Programmable Impedance ZA Relay Driver RDI RDO Figure 1 - Functional Block Diagram 2-157 MH88617 Advance Information TIP 1 IC RING IC LR RC ESE ESI LCA IC IC 2 3 VBAT IC SHK 28 27 26 25 24 23 22 21 20 19 18 17 16 15 4 5 6 7 8 9 10 11 12 13 14 DCRI RDI RDO LR TIP RING VBAT LCA VX GVX VR VCC AGND VEE RV ESE ESI IC SHK RC ZA VX GVX DCRI IC IC IC VCC AGND VEE ZA RV VR RDI RDO 28 Pin DIL 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 21 Pin SIL Name Description 26 1 DCRI 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. 16 2 RDI Relay Driver Input. Relay driver control pin. 15 3 RDO Relay Driver Output. Open collector relay driver output. 5 4 LR 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. 1 5 TIP Tip Lead. Connects to the "Tip" lead of the subscriber line. 3 6 RING Ring Lead. Connects to the "Ring" lead of the subscriber line. 12 7 VBAT Battery Voltage. Battery supply for the subscriber line. Typically -48V DC is applied to this pin. 9 8 LCA 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. 28 9 VX 27 10 GVX 17 11 VR 22 12 VCC 21 13 20 14 2-158 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. AGND Analog Ground. Ground path for the subscriber line and all DC power supplies, normally connected to system ground. VEE Negative Supply Voltage. -5V. MH88617 Advance Information Pin Description (continued) 28 Pin DIL 21 Pin SIL Name Description 18 15 RV 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. 7 16 ESE External Signal Enable. Meter pulse input enable. 8 17 ESI External Signal Input. Meter pulse input. 2, 4,10 11,13 ,23 25,24 18 IC 14 19 SHK 6 20 RC Ringing Control (Input). A logic 1 will cause the ringing voltage to be applied to the line. 19 21 ZA Line Impedance. Connect passive components from ZA to ground to match input and line impedance. Internal Connection. No connection should be made to this pin. Switch Hook Detect (Output). A logic 1 at this pin indicates when the subscriber has gone Off-Hook. 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. External Protection Circuit 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. Battery Feed and Loop Current Adjust 2-4 Wire Conversion 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 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. 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. 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 Tip and Ring consists of both the signal from the The device will operate over a very wide VBAT supply range but care must be taken when programming the constant current that the maximum power dissipation is not exceeded. For the majority 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. 2-159 MH88617 Advance Information 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. 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). 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. 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. 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. 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 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. -48V 0-100V C2 VCC VEE 1.0Vrms Sinewave (16-68Hz) +5V VBAT DCRI RV 10k MT896x F1 TIP TIP E.G Teccor P2353AB Protection Circuit MH88617 F2 RING RING LR SD3 CA RDI SD2 F1i ESE SD1 CLK RC SD0 VX VX DSTi R1 SHK SHK Relay Drive Output Loop Current Adjust Input RDO GVX Notes: 1) For Resistor and Impedance values see Table 1 2) C1 and C2 are 100nF decoupling capacitors T Z2 VR VR LCA AGND DSTo ZA ESI R2 Z1 3) F1 and F2 Slow Blow Fuses Figure 3 - Typical Application Circuit 2-160 1.0Vrms Sinewave (12/16kHz) MH88617 Advance Information ILOOP VBAT @ -48V LCA O/C 24mA 14mA Constant Voltage Constant Current RLOOP 0Ω ≈1800Ω ≈2800Ω 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. 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. 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 600Ω and a 200Ω 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. 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. Reversal If the system wants to initiate a call the AGND must be removed from the LCA before the ringing signal is transmitted. 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 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. 2-161 MH88617 Advance Information Relay Driver Mechanical Data 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. See Figure 11, 12, 13, and 14 for details of the mechanical specification. The DC resistance of the relay coil must exceed 230Ω Line Conditions Programming Components Line Impedance Balance Impedance VX Gain VR Gain Z1 Z2 R1 R2 600Ω 600Ω 0dB 0dB 30k 18k + 18k T 470pF 36k 110k 600Ω 600Ω 4dB -4dB 30k 28k5 + 28k5 T 330pF 57k 180k 600Ω 350Ω+1KΩ //210nF 0dB 0dB 60k//30k 18k + 18k T (10k3+5.3nF) 36k 110k 370Ω+620Ω/ /310nF 370Ω+620Ω //310nF 0dB 0dB 40k//(1.2nF+ 32k5) 18k + 18k T 100pF 36k (124k//1.5nF) + 64k 220Ω+820Ω/ /115nF 220Ω+820Ω //115nF 0dB 0dB 41k//(630pF+3k) 36k 36k (164k//550pF) + 34k 900Ω 900Ω 0dB 0dB 38k9 18k+18k T 330pF 36k 174k 270Ω+750Ω/ /150nF 270Ω+750Ω //150nF 0dB 0dB 40k3//(11k5+730pF) 18k+18k T 100pF Table 1 - External Programming Components 36k (150k//760pF) + 48k5 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. 2-162 MH88617 Advance Information Absolute Maximum Ratings* - All voltages are with respect to AGND unless otherwise specified. Parameter Sym Min Max Units 1 DC Supply Voltage VCC VEE -0.3 -6 6 0.3 V V 2 DC Battery Voltage VBAT -75 0.3 V 3 DC Ringing Voltage VDCRI -0.7 150 V 4 DC Reference Voltage LCA -0.3 6 V 5 Relay Driver Voltage RDO -0.3 15 V 6 Relay Driver Coil Resistance 7 Ringing Input Voltage 8 Maximum Power Handling Capacity (Off-hook) 9 Ω 230 RV @ 25˚C @ 70˚C @ 85˚C Storage Temperature 0 PD TS -55 3 Vrms Note 1 2250 1530 1290 mW mW mW +125 ˚C *Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. . Recommended Operating Conditions Parameter 1 DC Supply Voltages Sym Min Typ‡ Max Units VCC VEE 4.75 -5.25 5.0 -5.0 5.25 -4.75 V -48 -20 V 110 V 2.5 Vrms Note 1 mW @ 25˚C 2 DC Battery Voltage VBAT -72 3 DC Ringing Voltage VDCRI 5 4 Ringing Input Voltage RV 5 Ringing Output Power PR 6 Operating Temperatures TOP 2250 -40 25 85 Test Conditions V ˚C ‡ Typical figures are at 25˚C 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. 2-163 MH88617 Advance Information DC Electrical Characteristics† Characteristics 1 Sym Min Max Units Supply Current ICC ICC IEE IBAT IDCRI IDCRI 12 ILoop + 12 -12 -3 100 100 PC 40 270 24 2 Power Consumption 3 Constant current feed to line ILoop 4 Adjustable loop current range ILoop 14 5 Maximum operating loop resistance RLoop 2000 6 Tip or Ring to Gnd, OverCurrent Protection 7 Low Level Output Voltage High Level Output Voltage 8 Relay driver current sink capability 9 Low Level Input Voltage High Level Input Voltage Low Level Input Current High Level Input Current Switch Hook detect threshold mA mA mA mA µA mA 80 55 VOL 2.4 20 mA LCA O/C, Vbat = -48V RLoop = 300Ω, VCC = 5V mA V IOH = 0.4mA V IIL 0.1 mA IIH 0.5 mA 13 RDI = 5V V 5.0 8.5 Vbat = -48V IOL = 4mA VIH 4 ILoop = 18mA, Vbat = -48V includes telephone set V mA 0.8 VIL 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 mA 0.4 Test Conditions mW mW Ω 100 VOH 10 Typ‡ mA Vbat = -48V † Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. ‡Typical figures are at 25°C 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 2-164 MH88617 Advance Information AC Electrical Characteristics † Characteristics 1 Ringing drive capability 2 AC Ringing Amplifier Gain (Note 5) Output Voltage (Note 3) Frequency Range 3 Sym Min Typ‡ Max 5 ARING VRING FRING 50 60 16 68 Units Test Conditions REN 5 REN=1400 Ω @ 20Hz RLOOP = 1800Ω V@Load=35Vrms (@25˚C) DCRI=100VDC Vbat=-48V Vrms Hz Auto Ring Trip & SHK detect time Ring Trip SHK 200 40 mS mS 4 Input Impedance at VR 10 kΩ 5 Output Impedance at VX 6 Receive Gain (VR to 2-Wire) Off-Hook VBAT = -48V DC VDCRI = 100V DC RV = 1.2Vrms sinewave, REN 5 Test circuit as Fig 5 -0.2 Programmable Range On-Hook (relative to Off-Hook) 0 -12 RV = 16Hz, RC = 1 RC at logic 0 10 Ω 0.2 dB Test circuit as Fig 7 Input 0.5V at 1kHz 6 dB dB T-R Load > 10kΩ, Output<2.25V @ 1kHz 6 7 Frequency Response Gain (relative to Gain @ 1kHz) -0.25 0 0.25 dB Test circuit as Fig 7 300 - 3400Hz 8 Transmit Gain (2-Wire to VX) -0.2 0 0.2 dB Test circuit as Fig 6 Input 0.5V @ 1kHz Programmable Range -12 0.25 dB Test circuit as Fig 6 300 - 3400Hz 1 % Test circuits as Fig 6&7 Output 0dBm @ 1kHz 5 % Test circuits as Fig 6&7 Output +3dBm @ 1kHz dB Test circuit as Fig. 9 200 - 3400Hz 9 Frequency Response Gain (relative to Gain @ 1kHz) 10 Total Harmonic Distortion at VX and 2-Wire. 11 Overload at VX and 2-Wire. 12 Common Mode Rejection Ratio CMRR 13 Idle Channel Noise at VX Nc 12 dBrnC Test circuit as Fig. 7 Input 0V 14 Idle Channel Noise at 2-Wire Nc 12 dBrnC Test circuit as Fig. 7 Input 0V 15 Power Supply Rejection Ratio at VX and 2-Wire VX 2-Wire 16 17 Transhybrid Loss Return Loss at 2-Wire -0.25 6 0 THD 48 PSRR 25 25 dB dB Test circuit as Fig. 7 Ripple 0.1Vrms 1kHz @ VCC/ VEE / VBAT / VDCRI 18 21 dB Test circuit as Fig 7 300 - 3400Hz 500 - 2500Hz 18 dB THL RL Test circuit as Fig 8 300 - 3400Hz 2-165 MH88617 Advance Information AC Electrical Characteristics † (continued) Characteristics 18 Sym Longitudinal to Metallic Balance Metallic to Longitudinal Balance 19 Meter Pulse output level (Note 5) 20 Audio settling time after reversal Min Typ‡ 55 48 60 53 Max dB dB 60 40 ESO 1.75 Units dB dB 2 2.25 Vrms 50 mS Test Conditions Test circuit as Fig. 9 200-1000Hz 1000-3400Hz Test circuit as Fig. 10 200-1000Hz 1000-4000Hz ZA= 30K (600R config) T-R AC Load = 200Ω, ESI = 1Vrms † Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. ‡Typical figures are at 25°C with nominal power supplies unless otherwise stated and are for design aid only. Test conditions shown in Figures 7-12 are programmed for 600Ω. 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 600Ω 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. 2-166 MH88617 Advance Information +5V -48V +5V -5V +90V 1K LCA SHK VBAT VCC VEE DCRI LR VX I TIP SW1 R1 10uF 1 DUT GVX 2 300R 3 1.6k Z2 R2 VR ZA RDO RDI ESI ESE GND 100Ω Z1 RING RV RC Ringing Source 1.2Vrms 20Hz 1K Z1 = 30kΩ Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Figure 5 - DC Condition Test +5V 1K LCA LR -48V +5V -5V +90V VBAT VCC VEE DCRI VX 100uF SHK TIP + R1 10H 1kΩ DUT GVX Z2 I=24mA VR R2 ZA Z1 RDI RDO 100Ω ESI ESE GND 1K RC RING RV Vs Impedance = 600Ω 100uF + Ringing Source 1.2Vrms Z1 = 30kΩ Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Gain = 20 * Log (VX / Vs) Figure 6 - 2-4 Gain Wire Test Circuit 2-167 MH88617 Advance Information +5V 1K LCA -48V +5V -5V +90V 100uF SHK VBAT VCC VEE DCRI LR VX TIP + R1 10H 1kΩ DUT GVX Zin (600Ω) I=24mA Z2 VR R2 ZA RDI RDO ESI ESE GND 100uF RING RV RC + Vs 100Ω Z1 Ringing Source 1.2Vrms 20Hz 1K Z1 = 30kΩ Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k Gain = 20 * Log (V(Zin) / Vs) Figure 7 - 4-2 Wire Gain Test Circuit +5V 1K VX LCA LR -48V +5V -5V +90V VBAT VCC VEE DCRI 100uF SHK TIP + R1 GVX R2 I=24mA VR ZA RDI RDO Z1 100Ω ESI ESE GND 1K RC RING RV Ringing Source 1.2Vrms 20Hz Return Loss = 20 * Log (2V1/Vs) Figure 8 - Return Loss 2-168 V1 10H 1kΩ DUT Z2 Zin 300Ω Vs 100uF 300Ω + Z1 = 30kΩ Z2 = 18k + 18K T 470pF R2 = 110k R1 = 36k MH88617 Advance Information +5V 1K LCA VX -48V +5V -5V +90V VBAT VCC VEE DCRI LR 100uF SHK TIP + R1 10H 1kΩ DUT GVX V2 Z2 I=24mA R2 VR ZA RDI RDO ESI ESE GND 100Ω Z1 RC 300Ω V1 300Ω 100uF RING RV Vs + Ringing Source 1.2Vrms 20Hz 1K Z1 = 30kΩ 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 +5V 1K LCA VX LR -48V +5V -5V +90V VBAT VCC VEE DCRI 100uF SHK TIP + 300Ω R1 10H 1kΩ DUT GVX Z2 R2 Vs 300Ω I=24mA VR RDI ZA RDO 100Ω Z1 ESI ESE GND 1K RC RING RV V1 510Ω + 100uF Ringing Source 1.2Vrms 20Hz Met. to Long. Balance = 20 * Log (V1 / Vs) Z1 = 30kΩ Z2 = 18k + 18k T 470pF R2 = 110k R1 = 36k Figure 10 - Metallic to Longitudinal Balance 2-169 MH88617 Advance Information 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) * 0.05 + 0.01 (1.3 + 0.25) * 0.100 + 0.010 (2.54 + 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: 260˚C for 10 secs. * Dimensions to centre of pin. Figure 11 - Mechanical Data for 21 Pin SIL Hybrid 0.162 Max (4.12 Max) 0.27 Max (6.9 Max) 0.080 Max (2.0 Max) 0.08 Typ (2 Typ) 1.01 Typ * (25.8 Typ) * 0.100+0.010 (2.54+0.25) 0.020 + 0.005 (0.5 + 0.13) 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˚C for 10 secs. * Dimensions to centre of pin. 1 1.42 Max (36.1 Max) Figure 12 - Mechanical Data for 28 Pin DIL Hybrid 2-170 * 0.05 Typ (1.27 Typ) 0.260+0.015 (6.6+0.38) MH88617 Advance Information 0.162 Max (4.11 Max) 0.287 Max (7.29 Max) 0.08 Max (2.0 Max) 0.110+0.015 (2.80+0.38) 1.00 Typ (25.40 Typ) 0.020 + 0.005 (0.5 + 0.13) * 0.05 Typ (1.27 Typ) * 0.100+0.010 (2.54+0.25) 0.060 Typ (1.52 Typ) Notes: 1.15 Max (29.2 Max) 1) Not to scale 2) Dimensions in inches. (Dimensions in millimetres) 1 3) Pin tolerances are non-accumulative. 4) Recommended soldering conditions: Max reflow temp: 220˚C for 10 secs. * Dimensions to centre of pin. 1.42 Max (36.1 Max) Figure 13 - Mechanical Data for 28 Pin SMT 2.12 Max (53.85 Max) 0.75 + 0.02 (19.0 + 0.51) 1 0.080 + 0.020 (2.03 + 0.51) 0.170 Max (4.32 Max) 0.080 Max (2.03 Max) Notes: 0.260 + 0.015 (6.60 + 0.38) 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. * 0.05 + 0.01 (1.3 + 0.25) * 0.100 + 0.010 (2.54 + 0.25) 0.020 + 0.005 (0.51 + 0.13) Figure 14 - Mechanical Data for 28 Pin T Bend 2-171 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. 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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