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M3493B2 june 1998 cmos 12 x 8 crosspoint with control memory ? . low on resistance (typ. 60 w at v dd = 10 v) . internal control latches . analog signal swing capability equal to power supply voltage applied . less than 1 % total distort. at 0 dbm . less than C 95 db cross-talk at 1 khz 1 v pp . very low power consumption . pin-to-pin compatible with m093 description the m3493 contains a 12 x 8 array of crosspoint to- gether with a 7 to 96 line decoder and latch circuits. anyone of the 96 switches can be addressed by se- lecting the appropriate 7 input bits. the selected switch can be turned on or off by applying a logical one or zero to the data in and the strobe input at logi- dip40 ordering number : M3493B2 (*) (*) it substitutes the obsolete m3493b1. cal one. a reset signal can be used to turn off all the switches together when is switched at logical one. m3493 is available in 40 lead dual in-line plastic package. block diagram 1/12
input/output description i/o symbol pin description power iv dd 40 positive power supply iv ss 20 negative power supply address i ax0-ax3 4, 5, 22, 23 x address lines. these 4 pins are used to select one of the 12 rows of switches. refer to the truth table for legal address. i ay0-ay2 2, 24, 25 y address lines. these 3 pins are used to select one of the 8 columns of switches. refer to the truth table for legal address. control i data 38 this input determines if the selected switch will be turned on (closed) or off (opened). if the pin is held high, the selected switch will be closed. if the pin is held low, the switch will be opened. i strobe 18 this pin enables whatever action is selected by the address and data pins. when the strobe pin is held low, no switch openings or closings take place. when the strobe pin is held high, the switch addressed by the select lines will be opened or closed (depending upon the state of the data pin) i reset 3 master reset. this pin turns off (opens) all 96 switches. the states of the above control lines are irreleant. this pin is active high. data i/o x0-x11 8-13, 28-33 analog input/outputs. these pins are connected to the y0-y7 pins in according to the truth table. i/o y0-y7 1,15,17,19,21 35,37,39 analog input/outputs. these pins are connected to the x0-x15 pins in according to the truth table. pin connection (top view) M3493B2 2/12
absolute maximum ratings symbol parameter value unit v dd dc supply voltage - 0.5, 14 v v in input voltage range - 0.5, v dd + 0.5 v p tot power dissipation 1 w t oper operating temperature range 0, + 70 o c t stg storage temperature range - 50, + 125 o c stresses above those listed under "absolute maximum ratings" may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions in excess of those indicated in the operati onal sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. truth table address connections ax0 ax1 ax2 ax3 ay0 ay1 ay2 0 1 0 1 0 1 0* 1* 0 1 0 1 0 1 0* 1* 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x0 - y0 x1 - y0 x2 - y0 x3 - y0 x4 - y0 x5 - y0 no connection no connection x6 - y0 x7 - y0 x8 - y0 x9 - y0 x10 - y0 x11 - y0 no connection no connection 0 1 0 0 0 1 0 1 1 1 0 0 0 0 x0 - y1 <0> x11 - y1 0 1 0 0 0 1 0 1 0 0 1 1 0 0 x0 - y2 x11 - y2 0 1 0 0 0 1 0 1 1 1 1 1 0 0 x0 - y3 x11 - y3 0 1 0 0 0 1 0 1 0 0 0 0 1 1 x0 - y4 x11 - y4 0 1 0 0 0 1 0 1 1 1 0 0 1 1 x0 - y5 x11 - y5 0 1 0 0 0 1 0 1 0 0 1 1 1 1 x0 - y6 x11 - y6 recommended operating conditions symbol parameter value unit v dd supply voltage 10 v t oper operating temperature 0, + 70 o c v in (logic signal) 0, v dd v M3493B2 3/12
static electrical characteristics (t amb = 0 to 70 o c, v dd = 10v, unless otherwise specified symbol parameter test conditions min. typ. max. unit i s supply current reset = v dd 1ma crosspoint on resistance v idc = 4.75v, v odc = 4.5v, see figure 1 60 100 w on resistance variation 10 20 w off-leakage * all switches off v os = v is = 0 to v dd 3 m a controls v il 0.8 v v ih 2.4 v input leakage * v in = 0 to v dd 3 m a * the device is guaranteed with such limits up to 70c. at 25c these limits become 100na. dynamic electrical characteristics (t amb = 25 o c, c l = 50pf all input square wave rise and fall times = 10ns, v dd = 10v) symbol parameter test conditions min. typ. max. unit fig. crosspoint t phl , t plh propagation delay time (switch on) signal input to output r h = 1k w , v is = 2v pp 30 100 ns 2 frequency response (any switch on) 20 log (v os /v is ) = -3db r h = 81 w , v is = 2v pp , c l = 3pf 50 mhz sine wave distortion f q = 1khz, r h = 0.6k w , v is = 8v pp 1% feed through (any switches off) f q = 10khz, r h = 1k w , v is = 2v pp -80 db 3 frequency for signal crosstalk attenuation of 40db attenuation of 110db r h = 1k w , v is = 2v pp 1 5 mhz khz 4 c capacitance xn to ground vn to ground feed through f q = 1mhz, v is = 0.1v pp 15 15 0.4 pf c capacitance logic input to ground f q = 1mhz, v is = 0.1v pp 5pf controls (t r , t f = 10ns) t psn propagation delay time strobe to output (switch turn-on to high level) r l = 1k w , c l = 50pf 150 200 ns 5 t pzh data-in to output (turn-on to high level) 150 200 ns 6 t pan address to output (turn-on to high level) 150 200 ns 7 t psf propagation delay time strobe to output (switch turn-off) 150 200 ns 5 t pzl data-in to output (turn-on to low level) 150 200 ns 6 t paf address to output (turn-off) 150 200 ns 7 t s set-up time data-in to strobe 40 ns 5 10 t h hold time data-in to strobe 120 ns 5 10 t o switching frequency 1 mhz t w strobe pulse width 100 ns 10 t wr reset pulse width 150 ns 9 t phz reset turn-off to output delay 150 200 ns 9 t as address set-up time address to strobe 120 ns 10 t ah address hold time address to strobe 120 ns 10 control crosstalk data-in, address or strobe to output square wave input, v in = 3v, r l = 10k w 75 mv 8 M3493B2 4/12
test circuits figure 1 : r on measurement. figure 2 : propagation delay time and wave- forms (signal input to signal output switch on). figure 3 : off isolation measurement (feed through). M3493B2 5/12
figure 4 : crosstalk measurements. figure 5 : propagation delay time and waveforms (strobe to signal output switch turn-on or turn-off). figure 6 : propagation delay time and waveforms (data-in signal output, switch turn-on to high or low level). M3493B2 6/12
figure 7 : propagation delay time and waveforms (address to signal output switch turn-on or turn-off). figure 8 : waveforms for crosstalk (control input to signal output). M3493B2 7/12
figure 9 : propagation delay time and waveforms (reset to output delay). figure 10 : propagation delay time and waveforms (strobe and c/s to signal output switch). M3493B2 8/12
figure 11 : typical r on versus v is . figure 12 : peak to peak voltage capability versus total harmonic distortion. figure 13 : v rms capability versus v dd . M3493B2 9/12
typical applications the figures 14, 15 and 16 show the system configuration for expanded matrices (16 x 16, 8 x 64, 32 x 32). figure 14 : (16 x 16 non blocking matrix). figure 15 : (8 x 64 matrix). figure 16 : (32 x 32 non blocking matrix). M3493B2 10/12
dip40 package mechanical data dim. mm inch min typ max min typ max a1 0.63 0.025 b 0.45 0.018 b1 0.23 0.31 0.009 0.012 b2 1.27 0.050 d 52.58 2.070 e 15.2 16.68 0.598 0.657 e 2.54 0.100 e3 48.26 1.900 f 14.1 0.555 i 4.445 0.175 l 3.3 0.130 M3493B2 11/12
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nse- quences of use of such information nor for any infringement of patents or other rights of third parties which may result from i ts use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specification mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmi- croelectronics products are not authorized for use as critical components in life support devices or systems without express wr itten approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 1998 stmicroelectronics C printed in italy C all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - france - germany - italy - japan - korea - malaysia - malta - mexico - morocco - the neth erlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. M3493B2 12/12

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