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vitesse semiconductor corporation page 1 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 features general description this vsc851 is a 32 x 32 crosspoint switch intended for high speed digital data communications applica- tions. this product has 32 data inputs and 32 data outputs. any input can be multiplexed to any, some, or all out- puts. high speed digital data up to 1.6gb/s can be switched with less than 150ps pulse width distortion. in broadcast mode, any two outputs will exhibit less than 250ps of skew relative to one another. signals in data paths are fully differential to minimize duty cycle distortion. the vsc851 requires both -2v and 3.3v power supplies. the address signals that control traffic patterns for data paths are double buffered. the lstrobe signal load individual addresses for each output. the g strobe signal is used to update addresses for all 32 outputs simul- taneously. this method allows users to configure any, some or all switches independently without disrupting data flow of the data paths. broadcast and flow through functionality are controlled via broadcast and flowthru inputs. this product is ideal for high speed digital applications including gigabit ethernet and atm switch cores, data distribution for telecommunications, fiber channel networking, computer networking, multiprocessor switching, and test equipment. in a telecommunications sonet application, for example, the vsc851 can be used as an sts-12 protection switch. the vsc851 is packaged in a 256 pin thermally enhanced ldcc package. this product is fabricated using vitesse's e/d gaas mesfet process which achieves high speed coupled with low power dissipation. functional description the vsc851 may be used to connect any one of 32 inputs to any one or combination of 32 output channels, according to a user defined bit pattern stored in each output channel's control latches (see figure 1). for data path operation, signals flow transparently from inputs i+/i-[0:31] to output channels z+/z-[0:31] through thirty-two 32:1 multiplexers. the traffic pattern is controlled by data previously stored in thirty-two 5-bit con- trol latches each corresponding to an output channel. value of these 5-bit control latches is a binary numerical representation of the input channel selected. d[4:0] = 00000 corresponds to i[0] , d[4:0] = 00001 corresponds to i[1] , etc. similarly, a [4:0] = 00000 selects path to output z [0] , a [4:0] = 00001 to z [1] , etc. to configure the switch, at rising edge of lstrobe , the bank of holding registers for a particular channel is updated by input addresses d[4:0] which describes a new path for that channel. after some or all holding registers are pro- grammed, a high pulse is applied to gstrobe to transfer the information from holding registers into all control latches. by this method, the entire crosspoint switch can be reconfigured simultaneously. ? 1.6gb/s operation ? non-blocking architecture ? duty-cycle distortion: 150ps ? 2ns propagation delay for data path ? 250ps output to output skew in broadcast mode ? power supply: -2 v and 3.3 v ? ecl differential data paths ? 3.3 v ttl control signals ? low power dissipation ? package: 256-pin ldcc
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 2 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 32 x 32 switch matrix gstrobe input buffers output buffers 32 x 32 control latches 32 x 5 holding registers lstrobe a [4:0] 5 to 32 decode broadcast flowthru d [4:0] 0,1......31 160 64 64 32 32 5 z + [0:31] z - [0:31] i + [0:31] i - [0:31] the vsc851 can be configured in broadcast mode. in broadcast mode, at the rising edge of lstrobe , all holding registers are updated by input addresses d[4:0] . if a high pulse is applied to gstrobe , the entire cros- spoint is configured and the selected data are broadcasted to all of the outputs. in flowthru mode, at the rising edge of lstrobe , all holding registers are set to the numerical representa- tion of the output which they control, (i.e., 00000 is loaded for output z[0] , 00001 is loaded for output z[1] etc.). if a high pulse is then applied to gstrobe , these values are passed to the control latches. in this mode, data from i[0] is switched to z[0] data from i[1] is switched to z[1] , etc. the input address values at d[4:0] and the output address values at a[4:0] are ignored in flowthru mode. all data input and output signals ( i+/i- [0:31] , z+/z-[0:31] ) are differential ecl levels. all other signals are ttl levels. if both broadcast and flowthru inputs are asserted, the flowthru mode overrides the broadcast mode. vsc851 block diagram
vitesse semiconductor corporation page 3 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 ac characteristics (over recommended operating conditions. ecl output load 50 w to v tt. ) table 1: data flow mode . (1) duty cycle distortion = duty cycle out - duty cycle in (ps). with 8b/10b encoded data. ac timing waveforms figure 1: normal data flow timing parameters description min typ max units conditions t pw minimum input pulse width 640 ps worst case 60/40 input duty cycle t dly propagation delay 600 2000 ps tduty duty cycle distortion 150 ps at 1.6 gb/s note(1) tskew output to output skew 250 ps on a given part broadcast mode tpskew data path skew 500 ps for any 2 paths from i+/i- to z+/z- on a given part minimum input pulse width & propagation delay t dly t pw i+ [0:31] i-[0:31] z+ [0:31] z-[0:31] t dly t skew t skew
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 4 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 table 2: configuration, broadcast, flowthru mode . figure 2: configuration mode timing parameters description min typ max units conditions t lsw lstrobe pulse width 5 ns t gsw gstrobe pulse width 5 ns t gsz gstrobe to z+/z- outputs delay 1.5 5.0 ns t lsz lstrobe to z+/z- outputs delay 2 6.0 ns gstrobe high t alssu a[4:0] to lstrobe setup time 3.5 ns t alsh a[4:0] to lstrobe hold time 1 ns t dlssu d[4:0] to lstrobe setup time 3.5 ns t dlsh d[4:0] to lstrobe hold time 1 ns t glsu gstrobe to lstrobe setup time 2.5 ns t glh gstrobe to lstrobe hold time 2 ns t blssu broadcast to lstrobe setup time 4 ns t blsh broadcast to lstrobe hold time 1 ns t flssu flowthru to lstrobe setup time 4 ns t flsh flowthru to lstrobe hold time 1 ns i+ [0:15] i- [0:15] z+ [0:31] z- [0:31] a[0:4] t lsw t dlssu t dlsh t alssu t alsh t glsu t gsz t glh (output address) d[0:4] (input address) lstrobe gstrobe t lsw t lsz t dly t gsw
vitesse semiconductor corporation page 5 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 figure 3: broadcast and flowthru timing dc characteristics (over recommended operating conditions. ecl output load 50w to v tt. ) parameters description min typ max units conditions v odif differential ecl output voltage 600 1100mv50 w to v tt v ocm common mode ecl output voltage -1.5 -1.0 v 50 w to v tt v idif differential ecl input voltage 200 1200 mv v icm common mode ecl input voltage -1.5 -0.5 v i ihe input high ecl current +200 m av in = -0.7v i ile input low ecl current -50 m av in = -2.0v v iht input high voltage (ttl) 2.0 4.3 v v ilt input low voltage (ttl) 0 0.8 v i iht input high current (ttl) 50 m a 2.0v < v in < 4.3v i ilt input low current (ttl) -500 m a -0.5v < v in < 0.8v i vttl vttl supply current 20 ma i vtt vtt supply current 3600 ma outputs open p d power dissipation 7500 mw t blssu t blsh flowthru gstrobe broadcast lstrobe t flssu t flsh t glsu
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 6 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 absolute maximum ratings (1) ecl power supply voltage , v tt potential to gnd.......................................................................-2.5v to +0.5v ttl power supply voltage , v ttl potential to gnd.....................................................................-0.5v to +4.3v ecl input voltage applied, v eclin .......................................................................................v tt -0.5v to +0.5v ttl input voltage applied, v ttlin ..................................................................................... -0.5v to v ttl +1.0v output current, i out ,(dc, output hi)......................................................................................................... 50 ma case temperature under bias, tc. ............................................................................................... ..-55 to +125 c storage temperature (ambient), tstg. ....................................................................................... -65 c to +150 c recommended operating conditions ecl supply voltage, v tt ......................................................................................................................-2.0v 5% ttl supply voltage, v ttl .....................................................................................................................3.3v 5% commercial operating temperature range, t(2).................................................................................. 0 to 70 c notes: (1) caution: stresses listed under "absolute maximum ratings" may be applied to devices one at a time without caus- ing permanent damage. functionality at or above the values listed is not implied. exposure to these values for extended periods may affect device reliability. (2) lower limit of specification is ambient temperature and upper limit is case temperature.
vitesse semiconductor corporation page 7 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 table 3: package pin identification signal pin i/o level pin description vtt 1 p -2v -2.0v power supply vcc 2 p gnd ground n/c 3 no connection n/c 4 no connection n/c 5 no connection vttl 6 p +3.3v +3.3v power supply n/c 7 no connection n/c 8 no connection n/c 9 no connection n/c 10 no connection vttl 11 p +3.3v +3.3v power supply n/c 12 no connection n/c 13 no connection z15 14 o ecl serial data out zn15 15 o ecl serial data out vtt 16 p -2v -2.0v power supply vcc 17 p gnd ground vttl 18 p +3.3v +3.3v power supply n/c 19 no connection z14 20 o ecl serial data out zn14 21 o ecl serial data out z13 22 o ecl serial data out zn13 23 o ecl serial data out vcc 24 p gnd ground z12 25 o ecl serial data out zn12 26 o ecl serial data out z11 27 o ecl serial data out zn11 28 o ecl serial data out vcc 29 p gnd ground z10 30 o ecl serial data out zn10 31 o ecl serial data out vtt 32 p -2v -2.0v power supply vcc 33 p gnd ground z9 34 o ecl serial data out zn9 35 o ecl serial data out vcc 36 p gnd ground z8 37 o ecl serial data out
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 8 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 zn8 38 o ecl serial data out z7 39 o ecl serial data out zn7 40 o ecl serial data out vcc 41 p gnd ground z6 42 o ecl serial data out zn6 43 o ecl serial data out z5 44 o ecl serial data out zn5 45 o ecl serial data out n/c 46 no connection vcc 47 p gnd ground vtt 48 p -2v -2.0v power supply vcc 49 p gnd ground z4 50 o ecl serial data out zn4 51 o ecl serial data out z3 52 o ecl serial data out zn3 53 o ecl serial data out vcc 54 p gnd ground z2 55 o ecl serial data out zn2 56 o ecl serial data out z1 57 o ecl serial data out zn1 58 o ecl serial data out vcc 59 p gnd ground z0 60 o ecl serial data out zn0 61 o ecl serial data out i0 62 i ecl serial data in vtt 63 p -2v -2.0v power supply vcc 64 p gnd ground in0 65 i ecl serial data in i1 66 i ecl serial data in in1 67 i ecl serial data in vcc 68 p gnd ground vtt 69 p -2v -2.0v power supply vcc 70 p gnd ground n/c 71 no connection i2 72 i ecl serial data in in2 73 i ecl serial data in i3 74 i ecl serial data in in3 75 i ecl serial data in i4 76 i ecl serial data in signal pin i/o level pin description
vitesse semiconductor corporation page 9 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 in4 77 i ecl serial data in i5 78 i ecl serial data in in5 79 i ecl serial data in i6 80 i ecl serial data in in6 81 i ecl serial data in n/c 82 no connection i7 83 i ecl serial data in in7 84 i ecl serial data in i8 85 i ecl serial data in in8 86 i ecl serial data in vtt 87 p -2v -2.0v power supply vcc 88 p gnd ground i9 89 i ecl serial data in in9 90 i ecl serial data in i10 91 i ecl serial data in in10 92 i ecl serial data in i11 93 i ecl serial data in in11 94 i ecl serial data in i12 95 i ecl serial data in in12 96 i ecl serial data in i13 97 i ecl serial data in in13 98 i ecl serial data in i14 99 i ecl serial data in in14 100 i ecl serial data in i15 101 i ecl serial data in in15 102 i ecl serial data in i16 103 i ecl serial data in in16 104 i ecl serial data in vtt 105 p -2.0v -2.0v power supply vcc 106 p gnd ground i17 107 i ecl serial data in in17 108 i ecl serial data in i18 109 i ecl serial data in in18 110 i ecl serial data in n/c 111 no connection i19 112 i ecl serial data in in19 113 i ecl serial data in i20 114 i ecl serial data in in20 115 i ecl serial data in signal pin i/o level pin description
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 10 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 i21 116 i ecl serial data in in21 117 i ecl serial data in i22 118 i ecl serial data in in22 119 i ecl serial data in i23 120 i ecl serial data in in23 121 i ecl serial data in n/c 122 no connection vtt 123 p -2v -2.0v power supply vcc 124 p gnd ground vcc 125 p gnd ground i24 126 i ecl serial data in in24 127 i ecl serial data in i25 128 i ecl serial data in vtt 129 p -2v -2.0v power supply vcc 130 p gnd ground in25 131 i ecl serial data in i26 132 i ecl serial data in in26 133 i ecl serial data in vcc 134 p gnd ground i27 135 i ecl serial data in in27 136 i ecl serial data in i28 137 i ecl serial data in in28 138 i ecl serial data in vcc 139 p gnd ground i29 140 i ecl serial data in in29 141 i ecl serial data in i30 142 i ecl serial data in in30 143 i ecl serial data in vtt 144 p -2v -2.0v power supply vcc 145 p gnd ground vcc 146 p gnd ground n/c 147 no connection i31 148 i ecl serial data in in31 149 i ecl serial data in z31 150 o ecl serial data out zn31 151 o ecl serial data out vcc 152 p gnd ground z30 153 o ecl serial data out zn30 154 o ecl serial data out signal pin i/o level pin description
vitesse semiconductor corporation page 11 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 z29 155 o ecl serial data out zn29 156 o ecl serial data out vcc 157 p gnd ground z28 158 o ecl serial data out zn28 159 o ecl serial data out vtt 160 p -2v -2.0v power supply vcc 161 p gnd ground z27 162 o ecl serial data out zn27 163 o ecl serial data out vcc 164 p gnd ground z26 165 o ecl serial data out zn26 166 o ecl serial data out z25 167 o ecl serial data out zn25 168 o ecl serial data out vcc 169 p gnd ground z24 170 o ecl serial data out zn24 171 o ecl serial data out z23 172 o ecl serial data out zn23 173 o ecl serial data out n/c 174 no connection vttl 175 p +3.3v +3.3v power supply vtt 176 p -2v -2.0v power supply vcc 177 p gnd ground z22 178 o ecl serial data out zn22 179 o ecl serial data out z21 180 o ecl serial data out zn21 181 o ecl serial data out vttl 182 p +3.3v +3.3v power supply z20 183 o ecl serial data out zn20 184 o ecl serial data out z19 185 o ecl serial data out zn19 186 o ecl serial data out vttl 187 p +3.3v +3.3v power supply z18 188 o ecl serial data out zn18 189 o ecl serial data out z17 190 o ecl serial data out vtt 191 p -2v -2.0v power supply vcc 192 p gnd ground zn17 193 o ecl serial data out signal pin i/o level pin description
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 12 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 z16 194 o ecl serial data out zn16 195 o ecl serial data out vcc 196 p gnd ground vtt 197 p -2v -2.0v power supply vcc 198 p gnd ground n/c 199 no connection n/c 200 no connection n/c 201 no connection n/c 202 no connection n/c 203 no connection vscte 204! i -2.0 test enable (tie to -2v) n/c 205 no connection n/c 206 no connection n/c 207 no connection n/c 208 no connection n/c 209 no connection n/c 210 no connection n/c 211 no connection n/c 212 no connection n/c 213 no connection n/c 214 no connection vtt 215 p -2v -2.0v power supply vcc 216 p gnd ground n/c 217 no connection n/c 218 no connection n/c 219 no connection a4 220 i ttl output address a3 221 i ttl output address a2 222 i ttl output address a1 223 i ttl output address a0 224 i ttl output address broadcast 225 i ttl control signal to enable flow thru mode flowthru 226 i ttl control signal to enable flow thru mode lstrobe 227 i ttl load addresses into holding registers d4 228 i ttl input address d3 229 i ttl input address d2 230 i ttl input address d1 231 i ttl input address d0 232 i ttl input address signal pin i/o level pin description
vitesse semiconductor corporation page 13 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 vtt 233 p -2v -2.0v power supply vcc 234 p gnd ground n/c 235 no connection n/c 236 no connection n/c 237 no connection n/c 238 no connection n/c 239 no connection n/c 240 no connection n/c 241 no connection n/c 242 no connection n/c 243 no connection n/c 244 no connection n/c 245 no connection n/c 246 no connection gstrobe 247 i ttl latch enable to transfer holding register data to control latches n/c 248 no connection n/c 249 no connection n/c 250 no connection vtt 251 p -2v -2.0v power supply vcc 252 p gnd ground vcc 253 p gnd ground vscipnc 254* i ttl test input (tie to -2v) vscopnc 255# o ecl test output (leave open) n/c 256 no connection signal pin i/o level pin description
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 14 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1 package information *at package body. notes: 1) drawing not to scale. 2) packages: ceramic (alumina); heat sinks: copper-tungsten; leads: alloy 42 with gold plating item mm (min/max) in (min/max) item mm (min/max) in (min/max) a 36.57/37.59 sq 1.440/1.480 sq f 0.09/0.216 0.004/0.008 b typ 28 sq typ 1.1 sq g 5.08/7.62 0.200/0.300 c* 0.51 typ 0.020 typ h 0.15/0.25 0.006/0.010 d 0.38/0.63 0.015/0.025 i* ref 2.54 typ ref 0.100 typ e 2.16/2.92 0.085/0.115 j* 32.00 typ 1.26 typ h i* c * j * e f g b a d pin 1 heat sink side package is cavity down pin 256 256 ldcc cavity down package
vitesse semiconductor corporation page 15 10/21/99 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 vitesse semiconductor corporation data sheet v sc851 1.6 gb/s 32 x 32 crosspoint switc h g52167-0 rev. 4.1 ordering information vsc851-fx device type: vsc851: 32x32 crosspoint switch package type f: 256 ldcc notice vitesse semiconductor corporation reserves the right to make changes in its products, specifications or other information at any time without prior notice. therefore the reader is cautioned to confirm that this datasheet is current prior to placing any orders. the company assumes no responsibility for any circuitry described other than circuitry entirely embodied in a vitesse product. warning vitesse semiconductor corporations products are not intended for use in life support appliances, devices or systems. use of a vitesse product in such applications without the written consent is prohibited.
vitesse semiconductor corporation data shee t vsc851 1 .6 gb/s 32x32 c rosspoint switch page 16 vitesse semiconductor corporation 741 calle plano, camarillo, ca 93012 ? 805/388-3700 ? fax: 805/987-5896 10/21/99 g52167-0 rev. 4.1

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