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1 features ? transformerless 2w to 4w conversion ? controls battery feed to line ? programmable line impedance ? programmable network balance impedance ? off-hook and dial pulse detection ? ring ground over-current protection ? programmable gain ? programmable constant current feed ? -22v to -72v battery operation applications line interface for: ? pabx/ons ? intercoms ? key telephone systems ? control systems description the mitel MT91600 provides an interface between a switching system and a subscriber loop, mainly for short loop slic applications. the functions provided by the MT91600 include battery feed, programmable constant current, 2w to 4w conversion, off-hook and dial pulse detection, user de?nable line and network balance impedances and the capability of programming the audio gain externally. the device is fabricated as a cmos circuit in a 28 pin ssop package. figure 1 - functional block diagram td ring tip drive controller audio gain & network balance circuit 2 w to 4 w conversion & line impedance relay driver line sense over-current protection circuit ring drive controller loop supervision tip tf rf c3a c3b rv rd vr z3 z2 z1 rlyc rlyd vee gnd vdd c2b c2a c1 shk vref ic x3 x2 x1 vx ds5057 issue 7 august 1999 package information MT91600 28 pin ssop package -40 c to +85 c MT91600 programmable slic preliminary information
MT91600 preliminary information 2 figure 2 - pin connections pin description pin # name description 1 vdd positive supply rail, +5v. 2td tip drive (output). controls the tip transistor. 3tf tip feed. connects to the tip transistor and to the tip lead via the tip feed resistor. 4 tip tip. connects to the tip lead of the telephone line. 5 ring ring. connects to the ring lead of the telephone line. 6 vref reference voltage (input). this pin is used to set the subscribers loop constant current. changing the input voltage sets the current to any desired value within the working limits. vref is related to vlc. 7ic internal connection (input). this pin must be connected to gnd for normal operation. 8rf ring feed. connects to the ring lead via the ring feed resistor. 9rv ring voltage and audio feed. connects directly to the ring drive transistor and also to ring feed via a relay. 10 rd ring drive (output). controls the ring transistor. 11 c3a a ?lter capacitor for over-current protection is connected between this pin and gnd. 12 c3b a ?lter capacitor for over-current protection is connected between this pin and gnd. 13 c2b a capacitor for loop current stability is connected between this pin and c2a. 14 c2a a capacitor for loop current stability is connected between this pin and c2b. 15 z1 line impedance node 1 . a resistor of scaled value "k" is connected between z1 and z2. this connection can not be left open circuit. 16 z2 line impedance node 2 . this is the common connection node between z1 and z3. 17 z3 line impedance node 3 . a network either resistive or complex of scaled value "k" is connected between z3 and z2. this connection can not be left open circuit. 18 x1 gain node 1 . this is the common node between z3 and vx where resistors are connected to set the 2w to 4w gain. 19 vx transmit audio (output) . this is the 4w analog signal to the slic. 20 x3 gain node 3 . this is the common node between vr and the audio input from the codec or switching network where resistors are ?tted to sets the 4w to 2w gain 21 vr receive audio (input) . this is the 4w analog signal to the slic. z3 x3 vref rlyd vee rf gnd z2 ic ring tip rv 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 tf vdd td rd c3a c3b c2b c2a rlyc shk c1 x2 vr vx x1 z1
preliminary information MT91600 3 22 x2 gain node 2. networks, either resistive or complex, are connected between this node, vr and gnd to set the network balance impedance for the slic. 23 c1 a ?lter capacitor for ring trip is connected between this pin and gnd. 24 shk switch hook (output). this pin indicates the line state of the subscribers telephone. the output can also be used for dial pulse monitoring. shk is high in off-hook state. 25 rlyc relay control (input). an active high on this pin will switch rlyd low. 26 rlyd inverted output of rlyc. it is used to drive the bipolar transistor that drives the relay (see figure 5.) 27 gnd ground. return path for +5v and -5v. this should also be connected back to the return path for the loop battery, lgnd and relay drive ground rlygnd. 28 vee negative supply rail, -5v. pin description (continued) pin # name description functional description the MT91600 is the analog slic for use in a 4 wire switched system. the slic performs all of the normal interface functions between the codec or switching system and the analog telephone line such as 2w to 4w conversion, constant current feed, ringing and ring trip detection, current limiting, switch hook indication and line and network balance impedance setting using minimal external components. refer to figure 5 for MT91600 components designation. 2 wire to 4 wire conversion the hybrid performs 2 wire to 4 wire conversion by taking the 4 wire signal from an analog switch or voice codec, a.c. coupled to v r , and converting it to a 2 wire differential signal at tip and ring. the 2 wire signal applied to tip and ring by the telephone is converted to a 4 wire signal, a.c. coupled to vx which is the output from the slic to the analog switch or voice codec. gain control it is possible to set the transmit and receive gains by the selection of the appropriate external components. the gains can be calculated by the formulae: 2w to 4w gain: gain 2 - 4 = 20*log [ r13 / r12] 4w to 2w gain: gain 4 - 2 = 20*log [0.891 * (r14 / r15)] impedance programming the MT91600 allows the designer to set the devices impedance across tip and ring, (z tr ), and network balance impedance, (z nb ), separately with external low cost components. for a resistive load, the impedance (z tr ) is set by r11 and r18. for a complex load, the impedance (z tr ) is set by r11, r18, r19 & c8 (see figure 5.) the network balance, (z nb ), is set by r16, r17 & c3 (see figure 5.) the network balance impedance should be calculated once the 2w - 4w gain has been set. line impedance for optimum performance, the characteristic impedance of the line, (z o ), and the devices impedance across tip and ring, (z tr ), should match. therefore: z o = z tr the relationship between z o and the components that set z tr is given by the formula: z o / ( r1+r2) = kz o / r11 where kz o =z lz z lz = r18, for a resistive load. z lz = [r18 + (r19 // c8)], for a complex load.
MT91600 preliminary information 4 the value of k can be set by the designer to be any value between 20 and 250. three rules to ensure the correct operation of the circuit: (a) r18 + r19 > 50k w (b) r1 = r2. (c) r11 > =50k w it is advisable to place these components as close as possible to the slic. network balance impedance the network balance impedance, (z nb ), will set the transhybrid loss performance for the circuit. the balance of the circuit is independent of the 4 - 2 wire gain but is a function of the 2 - 4 wire gain. the method of setting the values for r16 and r17 is given by the formula: r17 = [1.782 * z o / ( z o +z nb ) * ( r13 / r12 )] r17 + r16 [1 + r13 / r12] where z nb is the network balance impedance of the slic and z o is the line impedance. (r16 + r17) >= 50k w it is advisable to place these components as close as possible to the slic. loop supervision & dial pulse detection the loop supervision circuit monitors the state of the phone line and when the phone goes "off hook" the shk pin goes high to indicate this state. this pin reverts to a low state when the phone goes back "on hook" or if the loop resistance is too high for the circuit to continue to support a constant current. the shk output can also be monitored for dialing information when used in a dial pulse system. constant current control the slic employs a feedback circuit to supply a constant feed current to the line. this is done by sensing the sum of the voltages across the feed resistors, r1 and r2, and comparing it to the input reference voltage, vref, that determines the constant current feed current. the MT91600s programmable current range is between 18ma to 32ma. line drivers & overcurrent protection the line drivers control the external battery feed circuit which provide power to the line and allows bi- directional audio transmission. the loop supervision circuitry provides bias to the line drivers to feed a constant current while the over- current protection circuitry prevents the ring driver from causing the ring transistor to overload. the line impedance presented by the line driver circuitry is determined by the external network, which may be purely resistive or complex, allowing the circuit to be con?gured for use in any application. the impedance can also be ?xed to one value and modi?ed to look like a different value by re?ecting an impedance through the slic from an intelligent codec or dsp module. there is long term protection on the ring output against accidental short circuits that may be applied either across tip/ring to gnd or ring to gnd. this high current will be sensed and limited to a value that will protect the circuit. in situations where an accidental short circuit occurs either across tip/ring to gnd or ring to gnd, an excessive amount of current will ?ow through the ring drive transistor, q3. although the MT91600 will sense this high current and limit it, if the power rating of q3 is not high enough, it may suffer permanent damage. in this case, a power sharing resistor, r23, can be inserted (see figure 5) to dissipate some of the power. capacitor c13 is inserted to provide an a.c. ground point. the criteria for selecting a value for the power sharing resistor r23 can be found in the application section of this datasheet. ringing and ring trip detection ringing is applied to the line by disconnecting pin 8, rf, from pin 9, rv, and connecting it to a ringing source which is battery backed. this may be done by use of an electro-mechanical relay. the slic is capable of detecing an off hook condition during ringing by ?ltering out the large a.c. component by use of the external components connected to pin 23. this ?lter allows an off hook condition to be monitored at shk, pin 24.
preliminary information MT91600 5 when using dtmf signalling only i.e. pulse dialling is not used, the capacitor, c7, can be permanently connected to ground and does not require to be switched out during dialling. power up sequence the circuit should be powered up in the following order: agnd, vee, vdd, v bat. application the following application section is intended to demonstrate to the user the methods used in calculating and selecting the external programming components in implementing the MT91600 as an analog line interface in a communication system. the programming component values calculated below results in the optimum performance of the device. refer to figure 5 for MT91600 components designation. component selection feed resistors (r1, r2) the selection of feed resistors, r1 and r2, can signi?cantly affect the performance of the MT91600. it is recommended that their values fall in the range of: 200 w <= r1 <= 250 w where, r1 = r2 the resistors should have a tolerance of 1% (0.15% matched) and a power rating of 1 watt. loop current setting (r3, r4, c9) by using a resistive divider network, (figure 3), it is possible to maintain the required voltage at vref to set i loop . the loop current programming is based on the following relationship: i loop = - [ f * v lc + g * v bat ] * k o * h (r1 +r2) where, f = r4 / (r4 + r3) g = r3 / (r4 +r3) k o = 200000 / (200000 + (r4//r3) ) h = 1.07 i loop is in ampere from figure 3 with r1 = r2 = 220 w for i loop = 25ma, v lc = 0v, vbat=-48v figure 3 - resistor divider c9 is inserted to ensure pin 6, vref, remains at a.c. ground. 100nf is recommended. i loop can also be set by directly driving vref with a low impedance voltage source. (see figure 4). it is recommended that a small resistor be placed in series with the vref pin. in this case: i loop = 1.07 * vs where, vs < 0 (r1 +r2) figure 4 - direct voltage calculating component values for ac transmission there are ?ve parameters a designer should know before starting the component calculations. these ?ve parameters are: 1) characteristic impedance of the line z o 2) network balance impedance z nb 3) value of the feed resistors (r1 and r2) 4) 2w to 4w transmit gain 5) 4w to 2w receive gain the following example will outline a step by step procedure for calculating component values. given: r3 43k w v lc v ref 6 MT91600 r4 130k w v bat c9 100nf 2k w v ref 6 MT91600 c9 100nf vs
MT91600 preliminary information 6 z o = 600 w , z nb = 600 w , r1=r2= 220 w gain 2 - 4 = -1db, gain 4 - 2 = -1db step 1: gain setting (r12, r13, r14, r15) gain 2 - 4 = 20 log [ r13 / r12] -1 db = 20 log [r13 / r12] \ r12 = 112.2k w , r13 = 100k w . gain 4 - 2 = 20 log [0.891 * [r14 / r15)] -1 db = 20 log [0.891 * [r14 / r15)] \ r14 = 100k w , r15 = 100k w . step 2: impedance matching (r11, r18, r19, c8) a) z o / ( r1+r2) = kz o / r11 600/(220+220) = (k*600)/r11 let k = 125 \ r11 = 55k w. b) in general, kz o =z lz where: z lz = r18, for a resistive load. z lz = [r18 + (r19 // c8)], for a complex load. since we are dealing with a resistive load in this example z lz = r18, and therefore: kz o = r18 (125 * 600)= r18 \ r18 = 75k w. step 3: network balance impedance (r16, r17) r17 = [1.782 * z o / ( z o +z nb ) * ( r13 / r12 )] r17 + r16 [1 + r13 / r12)] r17 = 0.4199 r17 + r16 set r17 = 100k w , r16 becomes 138k w . \ r16 = 138k w , r17 = 100k w . complex line impedance, z o in situations where the characteristic impedance of the line z o is a complex value, determining the component values for impedance matching (r11, r18, r19, c8) is as follows: given z o = 220 w + (820 w // 120nf) z o / ( r1+r2) = kz o / r11 (equation 1) where, kz o = [r18 + (r19 // c8)] choose a standard value for c8 to ?nd a suitable value for k. since 1nf exists, let c8 = 1nf then, k = 120nf / c8 k = 120nf / 1nf \ k =120 r18 = k * 220 w r18 = 120 * 220 w r18 = 26400 r19 = k * 820 w r19 = 120 * 820 r19 = 98400 \ r18 = 26k4 w , r19 = 98k4 w from (equation 1) r11 = k * (r1 + r2) r11 = 120 * (220 w + 220 w ) \ r11 = 52k8 w power sharing resistor (r23) to determine the value of r23, use the following equations: r23(max)= | vbat(min)| - 100 - (2*r2 + lr + dcrp) 30ma r23(min)= | vbat(max)| - pd(max) - r2 40ma 1.6ma where, vbat(min/max) = the expected variation of vbat. r2 = the feed resistor. lr = maximum dc loop resistance. dcrp = dc resistance of the phone set. pd(max) = the maximum power dissipation of the ring drive transistor q3. if r23(max) > r23(min), then set r23 to be the geometric center: r23 = square root (r23(max) * r23(min))
preliminary information MT91600 7 if r23(max) < r23(min), then a violation has occurred. pd(max) will have to be increased. a numerical example: given: r2 = 220 w lr = 325 w (2.5km of 28 gauge wire, averaged at 65 w /km) dcrp = 200 w pd(max) = 1.5w vbat = -48v +/- 10% (i.e. -43v to -53v) therefore: r23(max) = (43/30ma) - 100 - (2 * 220 + 325 + 200) = 1433.3 - 100 - 965 r23(max) = 368.3 w r23(min) = (53/40ma) - (1.5/1.6ma) - 220 = 1325 - 937.5 - 220 r23(min) = 167.5 w r23 = square root ( 368.3 * 167.5 ) r23 = 248.4 w
MT91600 preliminary information 8 figure 5 - typical application MT91600 shk rlyc vrly q4 c4 24 25 26 vee vdd v lc r3 k1 d1 7 27 28 1 6 r4 v bat c9 2 3 q1 d2a r1 d2b 4 r21 tip r20 ring 5 r2 8 ~ v bat d3a d3b 9 r9 r7 vdd c5 r6 r5 90 vrms q3 v bat=-48v r8 10 q2 15 16 14 13 12 11 c10 c2 c1 17 18 19 c8 r18 r13 vx r15 vrin 20 21 r14 r16 r17 k1b 22 c3 c7 c6 23 pr1 k1a c11 r19 r22 r10 c12 v bat v bat r11 r12 z lz r18 impedance z lz resistive load z o complex load z o vdd td tf tip ring vref rf rv rlyc shk rlyd vee gnd ic c1 x2 vr x3 vx x1 z3 z2 z1 rd c3a c3b c2b c2a r23 c13
preliminary information MT91600 9 note: all resistors are 1/4 w, 1% unless otherwise indicated. *assumes z o = z nb = 600 w , gain 2 - 4 = -1db, gain 4 - 2 = -1db. decoupling capacitors, (1uf, 100v, 20%), can be added to v dd , v ee , v bat and v rly to provide improved psrr performance. k1 = electro-mechanical relay, 5v, dpdt/2 form c pr1 = this device must always be ?tted to ensure damage does not occur from inductive loads.for simple applications, pr1 can be replaced by a single tvs, such as 1.5ke220c, across tip and ring. for applications requiring lightning and mains cross protection further circuitry will be required and the following protection devices are suggested: p2353aa, p2353ab (teccor), thbt20011, thbt20012, thbt200s (sgs- thomson), tisp2290, tssp8290l (t.i.) component list* for a typical application with a resistive 600 w line impendance - refer to figure 5 for component designation and recommended con?guration resistor values r1 220 w 1% (0.15% matched), 1w r2 220 w 1% (0.15% matched), 1w r3 43k w r4 130k w r5 220 w r6 75k w r7 3k w r8 1k w r9 1k w r10 560k w r11 55k w r12 112k w r13 100k w r14 100k w r15 100k w r16 138k w r17 100k w r18 75k w r19 0 w r20 2k w r21 2k w r22 1k w r23 248 w capacitor values c1 100nf, 5% c2 300nf, 5% c3 100pf, 5% c4 33nf, 20% c5 3.3nf, 5% c6 1uf, 20%, 16v c7 100nf, 20% c8 0f c9 100nf, 20% c10 100nf, 5% c11 47pf, 20% c12 33nf, 10% c13 100nf 20% diodes and transistors d1 bas16 or equivalent d2a/b bav99 dual diode or equivalent d3a/b bav99 dual diode or equivalent q1 2n2222 or mpsa42 or mmbta42 q2 2n2907 or mpsa92 or mmbta92 q3 2n2222 or mpsa42 or mmbta42 q4 2n2907 or mpsa92 or mmbta92
MT91600 preliminary information 10 . * exceeding these values may cause permanent damage. functional operation under these conditions is not implied. note 1: voltage at vref pin set by vlc and potential divider. note 2: tip and ring must not be shorted together and to ground at the same time. note 3: the device contains circuitry to protect the inputs from static voltage up to 500v. however, precautions should be taken to avo id static charge build up when handling the device. ? typical ?gures are at 25?c with nominal supply voltages and are for design aid only ? electrical characteristics are over recommended operating conditions unless otherwise stated. ? typical ?gures are at 25 c with nominal + 5v supplies and are for design aid only. note 4: 16 to 68 hz superimposed on a v bat . absolute maximum ratings* parameter sym min max units comments 1 dc supply voltages v dd v ee v bat -0.3 -6.5 -80 +6.5 +0.3 +0.3 v v v limited by the drive transistor, q3. 2 ringing voltages vring 100 vrms superimposed on v bat 3 voltage setting for loop current v ref -20 +0.3 v note 1 4 overvoltage tip/gnd ring/gnd, tip/ring 200 v max 1ms (with power on) 5 ringing current iring 30 ma. rms 6 ring ground over-current 45 ma note 2 7 storage temp tstg -65 +150 ?c 8 package power dissipation pdiss 0.10 w +85?c max, v bat = -48v 9 esd rating 500 v human body model note 3 recommended operating conditions parameter sym min typ ? max units test conditions 1 operating supply voltages v dd v ee v bat 4.75 -5.25 -72 5.00 -5.00 -48 5.25 -4.75 -22 v v v 2 ringing voltage vring 0 50 v rms note 4 3 voltage setting for loop current vref -10.3 v i loop = 25ma, r1=r2=220 w v bat = -48v 4 operating temperature to -40 +25 +85 ?c
preliminary information MT91600 11 ? electrical characteristics are over recommended operating conditions unless otherwise stated. ? typical ?gures are at 25 c with nominal +5v and are for design aid only. note 5: off hook detection is related to loop current. dc electrical characteristics ? characteristics sym min typ ? max units test conditions 1 supply current i dd i ee i bat 25 11 8.5 45 ma ma ma 2 power consumption pc 60 90 mw standby/active 3 constant current line feed i loop 22 25 28 ma v ref = -10.3v test circuit as fig. 6 v bat = -48v 4 programmable loop current range i loop 18 32 ma 5 operating loop (inclusive of telephone set) r loop 1200 450 w w i loop = 18ma v bat = -48v i loop = 18ma v bat = -22v 6 off hook detection threshold shk 20 ma v ref = -10.3v v bat = -48v see note 5. i loop = 25ma 7rlyc input low voltage input high voltage vil vih 2.0 0.4 0.7 v v lil = 50 m a lih = +50 m a 8 shk output low voltage output high voltage vol voh 2.7 0.4 v v lol = 8ma loh = -0.4ma 8 dial pulse distortion on off +4 +4 ms ms
MT91600 preliminary information 12 ? electrical characteristics are over recommended operating conditions unless otherwise stated. ? typical ?gures are at 25 c with nominal +5v and are for design aid only. note 6: assumes z o = z nb = 600 w and both transmit and receive gains are programmed externally to -1db, i.e. gain 2-4 = -1db, gain 4-2 = -1db . mechanical information refer to the latest copy of the mitel data book for details of the outline for the 28 pin ssop package. ac electrical characteristics ? characteristics sym min typ ? max units test conditions 1 ring trip detect time tt 100 300 ms 2 output impedance at vx 10 w 3 gain 4-2 @ 1khz -1.3 -1 -0.8 db note 6 test circuit as fig. 8 4 gain relative to 1khz 0.15 db 300hz - 3400hz 5 transhybrid loss thl 20 25 db note 6 300hz - 3400hz test circuit as fig. 8 6 gain 2-4 @ 1khz -1.3 -1 -0.8 db note 6 test circuit as fig. 7 7 gain relative to 1khz 0.15 db 300hz to 3400hz 8 return loss at 2-wire rl 20 30 db note 6 300hz - 3400hz test circuit as fig. 10 9 total harmonic distortion @2w @vx thd 0.3 0.3 1.0 1.0 % % 3dbm, 1khz @ 2w 1vrms, 1khz @ 4w 10 common mode rejection 2 wire to vx cmr 35 42 db input 0.5vrms, 1khz test circuit as fig. 9 11 longitudinal to metallic balance lcl 55 db 200hz to 3400hz test circuit as fig. 9 12 metallic to longitudinal balance 58 48 db db 200hz to 1000hz 1000hz to 3400hz 13 idle channel noise @2w @vx nc 12 12 dbrnc dbrnc cmessage filter cmessage filter 14 power supply rejection ratio at 2w and vx vdd vee psrr 23 23 db db 0.1vp-p @ 1khz
preliminary information MT91600 13 test circuits figures 6,7,8,9,10 are for illustrating the principles involved in making measurements and do not necessarily re?ect the actual method used in production testing. figure 6 - loop current programming figure 7 - 2-4 wire gain figure 8 - 4-2 wire gain & transhybrid loss slic 6 i loop tip ring z o v lc r3 r4 v bat c9 slic 19 tip ring z o 2 __ z o 2 __ ~ v tr v s v x gain = 20*log(v x /v tr ) r12 17 18 r13 20 r15 slic 20 tip ring z o ~ v tr v s gain = 20*log(v tr /v s ) r15 r14 r16 r17 c3 c11 21 22 v x 19 thl = 20*log(v x /v s )
MT91600 preliminary information 14 figure 9 - longitudinal balance & cmr figure 10 - return loss slic long. bal. = 20*log(v tr /v s ) v x 19 cmr = 20*log(v x /v s ) tip ring z o 2 __ z o 2 __ ~ v tr v s r15 20 slic tip ring r ~ v s gain = 20*log(2*v z /v s ) 20 r15 z o r v z c8 r18 r19 r11 17 16 15
package outlines small shrink outline package (ssop) - n suf?x pin 1 a 1 b e d e a l h c a 2 dim 20-pin 24-pin 28-pin 48-pin min max min max min max min max a 0.079 (2) - 0.079 (2) 0.079 (2) 0.095 (2.41) 0.110 (2.79) a 1 0.002 (0.05) 0.002 (0.05) 0.002 (0.05) 0.008 (0.2) 0.016 (0.406) b 0.0087 (0.22) 0.013 (0.33) 0.0087 (0.22) 0.013 (0.33) 0.0087 (0.22) 0.013 (0.33) 0.008 (0.2) 0.0135 (0.342) c 0.008 (0.21) 0.008 (0.21) 0.008 (0.21) 0.010 (0.25) d 0.27 (6.9) 0.295 (7.5) 0.31 (7.9) 0.33 (8.5) 0.39 (9.9) 0.42 (10.5) 0.62 (15.75) 0.63 (16.00) e 0.2 (5.0) 0.22 (5.6) 0.2 (5.0) 0.22 (5.6) 0.2 (5.0) 0.22 (5.6) 0.291 (7.39) 0.299 (7.59) e 0.025 bsc (0.635 bsc) 0.025 bsc (0.635 bsc) 0.025 bsc (0.635 bsc) 0.025 bsc (0.635 bsc) a 2 0.065 (1.65) 0.073 (1.85) 0.065 (1.65) 0.073 (1.85) 0.065 (1.65) 0.073 (1.85) 0.089 (2.26) 0.099 (2.52) h 0.29 (7.4) 0.32 (8.2) 0.29 (7.4) 0.32 (8.2) 0.29 (7.4) 0.32 (8.2) 0.395 (10.03) 0.42 (10.67) l 0.022 (0.55) 0.037 (0.95) 0.022 (0.55) 0.037 (0.95) 0.022 (0.55) 0.037 (0.95) 0.02 (0.51) 0.04 (1.02) notes: 1) not to scale 2) dimensions in inches 3) (dimensions in millimeters) 4) ref. jedec standard m0-150/m0118 for 48 pin 5) a & b maximum dimensions include allowable mold flash general-11
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 documen t a tion - n o t for resale world headquarters - canada tel: +1 (613) 592 2122 fax: +1 (613) 592 6909 north america asia/paci?c europe, middle east, tel: +1 (770) 486 0194 tel: +65 333 6193 and africa (emea) fax: +1 (770) 631 8213 fax: +65 333 6192 tel: +44 (0) 1793 518528 fax: +44 (0) 1793 518581 http://www.mitelsemi.com 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 noti?ed 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 speci?cations, 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 speci?c piece of equipment. it is the users 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 signi?cant injury or death to the user. all products and materials are sold and services provided subject to mitels conditions of sale which are available on request.

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