scd8521 rev b features ? 16 kelvin measurement ch annels provided by tw o 16-channel multiplexers ? radiation performance - total dose: 300 krads(si), do se rate = 50 - 300 rads(si)/s - seu: immune up to 120 mev-cm 2 /mg - sel: immune by process design ? full military temperature range ? low power consumption < 30mw ? one address bus a 0 ~a 3 , and one enable line ? all channel inputs protected by 20v nominal transorbs ? fast access time 1500ns typical ? break-before-make switching ? high analog input impedance (power on or off ) ? designed for aerospace and high reliability space applications ? packaging ? hermetic ceramic - 56 leads, 0.80"sq x 0.20"ht quad flat pack - typical weight 6 grams mux8521 16-channel analog multiplexer module radiation tolerant & esd protected general description aeroflex?s mux8521 is a radiatio n tolerant, 16 channel multiple xer mcm (multi chip module) with electrostatic discharge (esd) protection on all channel inputs. the mux8521 has been specifically desi gned to meet exposure to radia tion environments. it is available in a 56 lead high temperature co-fired ceramic (htcc) quad flatpack (cqfp). it is guaranteed operational from -55c to +125c. available scr eened in accordance with mil-prf-38534, the mux8521 is ideal for demanding military and space applications. organization and application the mux8521 consists of two 16 channel multiplexers arranged as shown in the block diagram, addressable by bus a 0 ~a 3 including enable which connects the ad dressed channel to two separate outputs, "output" and "current". this technique enables selecti ng and reading a remote resistive sensor without the mux resistance being part of the me asurement. for grounded sensors, th is is done by passing current to the sensor by means of the "current" pin and readin g the resultant voltage (p roportional to the sensor resistance) at the "output" pin. standard products may 17, 2011 www.aeroflex.com/mux kelvin measurement configured
2 scd8521 rev b 5/17/11 aeroflex plainview mux8521: 16 kelvin me asurement channel analog mux block diagram ch 0 ch 15 ? ? ? en (0-15) current (0-15) a0 a1 a2 a3 output (0-15) mux 1 mux 2 16 16 16 vr +v ee -v ee v ref gnd
3 scd8521 rev b 5/17/11 aeroflex plainview absolute maxi mum ratings 1 / parameter range units case operating temperature range -55 to +125 c storage temperature range -65 to +150 c supply voltage +v ee (pin 18) -v ee (pin 46) v ref (pin 39) +16.5 -16.5 +16.5 v v v digital input overvoltage v en (pin 13), v a (pins 14, 15, 16, 17) < v ref +4 > gnd -4 v v analog input over voltage v in 18v v notes: 1 / all measurements are made with respect to ground. notice: stresses above those listed under "a bsolute maximums rating" may cause perm anent damage to the device. these are stress rating only; functional operation beyond the "operat ion conditions" is not recommended and ex tended exposure beyond the "operation con ditions" may affect device reliability. recommended operat ing conditions 1 / symbol parameter typical units +v ee +15v power supply voltage +15.0 v -v ee -15v power supply voltage -15.0 v v ref reference voltage +5.00 v v al logic low level +0.8 v v ah logic high level +4.0 v 1 / power supply turn-on sequence shall be as follows: +v ee , -v ee , followed by v ref . dc electrical performa nce characteristics 1 / (t c = -55c to +125c, +v ee = +15v, -v ee = -15v, v ref = +5.0v -- u nless otherwise specified ) parameter symbol conditions min max units supply current +i ee v en (0-15) = v a (0-3) = 0 0.1 1 ma -i ee v en (0-15) = v a (0-3) = 0 -1 -0.1 ma +i sby v en (0-15) = 4v, v a (0-3) = 0 6 / 0.1 1 ma -i sby v en (0-15) = 4v, v a (0-3) = 0 6 / -1 -0.1 ma address input current i al (0-3) a v a = 0v -2 2 ? a i ah (0-3) a v a = 5v -2 2 ? a enable input current i enl (0-15) v en (0-15) = 0v -2 2 ? a i enh (0-15) v en (0-15) = 5v -2 2 ? a
4 scd8521 rev b 5/17/11 aeroflex plainview positive input leakage current (ch0-ch15) +i soffoutput ( all ) v in = +10v, v en = 4v, output and all unused mux inputs under test = -10v 2 /, 3 / -100 +700 na negative input leakage current (ch0-ch15) -i soffoutput ( all ) v in = -10v, v en = 4v, output and all unused mux inputs under test = +10v 2 /, 3 / -100 +700 na positive output leakage current outputs (pins 12,45) +i doffoutput ( all ) v out = +10v, v en = 4v, output and all unused mux inputs under test = -10v 3 /, 4 / -100 +100 na negative output leakage current outputs (pins 12,45) -i doffoutput ( all ) v out = -10v, v en = 4v, output and all unused mux inputs under test = +10v 3 /, 4 / -100 +100 na input clamped voltage (ch0-ch15) +v clmp v en = 4v, all unused mux inputs under test are open. 3 / +25c +125c -55c 18.0 18.0 17.5 23.0 23.5 22.5 v v v input clamped voltage (ch0-ch15) -v clmp +25c +125c -55c -23.0 -23.5 -22.5 -18.0 -18.0 -17.5 v v v switch on resistance outputs (pins 12,45) r ds ( on )(0-15) a v in = +15v, v en = 0.8v, i out = -1ma 2 /, 3 /, 5 / 500 3000 ? r ds ( on )(0-15) b v in = +5v, v en = 0.8v, i out = -1ma 2 /, 3 /, 5 / 500 3000 ? r ds ( on )(0-15) c v in = -5v, v en = 0.8v, i out = +1ma 2 /, 3 /, 5 / 500 3000 ? notes: 1 / measure inputs sequentially. ground all unused inputs of the device under test. v a is the applied input voltage to the address lines a(0-3). 2 / v in is the applied input voltage to the input channels (ch0-ch15). 3 / v en is the applied input voltage to the enable line en (0-15). 4 / v out is the applied input voltage to the output lines output (0-15), current (0-15) 5 / negative current is the current flowing out of each of the mux pins. positive current is the current flowing into each mux p in. 6 / not tested, guaranteed to the specified limits. switching characteristics (t c = -55c to +125c, +v ee = +15v, -v ee = -15v, v ref = +5.0v -- u nless otherwise specified ) parameter symbol con ditions min max units switching test mux t a hl r l = 10k ? ??? c l = 50pf 10 1500 ns t a lh r l = 10k ? ??? c l = 50pf tc = +25c, +125c tc = - 5 5 c 10 10 2000 5000 ns ns t on en r l = 1k ? ??? c l = 50pf 10 1500 ns t off en 10 1000 ns dc electrical perform ance characteristics 1 / (continued) (t c = -55c to +125c, +v ee = +15v, -v ee = -15v, v ref = +5.0v -- u nless otherwise specified ) parameter symbol conditions min max units
5 scd8521 rev b 5/17/11 aeroflex plainview truth table (ch0 ? ch15) a3 a2 a1 a0 en (0-15) "on" channel 1 / xxxx h none llll l ch0 lllh l ch1 l l h l l ch2 l l h h l ch3 l h l l l ch4 l h l h l ch5 l h h l l ch6 l h h h l ch7 hlll l ch8 h l l h l ch9 h l h l l ch10 h l h h l ch11 h h l l l ch12 h h l h l ch13 h h h l l ch14 hhhh l ch15 1 / between (ch0-ch15) and output (0-15), current (0-15)
6 scd8521 rev b 5/17/11 aeroflex plainview mux8521 switching diagrams 4.0v 50% ~3v to 10.0v 50% 0v t off en t on en definition of t on en and t off en 0.8v 0v 0v 50% 50% 4.0v 0.8v 50% 11.6v min 11.6v min 4.0v address lines t a hl 50% note: f = 10khz, duty cycle = 50%. (a0 - a3) mux output mux output mux output address lines (a0 - a3) en lines t a lh definition of t a hl definition of t a lh 0.8v
7 scd8521 rev b 5/17/11 aeroflex plainview notes: 1. it is recommended that all "nc" or "no connect pin", be gr ounded. this eliminates or minimi zes any esd or static buildup. 2. package lid is internally connected to circuit ground (pins 7, 8, 11, 21, 22, 35, 36, 49, 50). pin numbers & functions mux8521 ? 56 leads ceramic quad flat pack pin # function pin # function 1 ch0 29 nc 2 ch1 30 nc 3 ch2 31 nc 4 ch3 32 nc 5 ch4 33 nc 6 ch5 34 nc 7gnd 35gnd 8gnd 36gnd 9 ch6 37 nc 10 ch7 38 nc 11 case gnd 39 v ref 12 output (0-15) 40 nc 13 en (0-15) 41 nc 14 a0 42 nc 15 a1 43 nc 16 a2 44 nc 17 a3 45 current (0-15) 18 +v ee 46 -v ee 19 ch15 47 nc 20 ch14 48 nc 21 gnd 49 gnd 22 gnd 50 gnd 23 ch13 51 nc 24 ch12 52 nc 25 ch11 53 nc 26 ch10 54 nc 27 ch9 55 nc 28 ch8 56 nc
scd8521 rev b 5/17/11 8 plainview, new york toll free: 800-the-1553 fax: 516-694-6715 se and mid-atlantic tel: 321-951-4164 fax: 321-951-4254 international tel: 805-778-9229 fax: 805-778-1980 west coast tel: 949-362-2260 fax: 949-362-2266 northeast tel: 603-888-3975 fax: 603-888-4585 central tel: 719-594-8017 fax: 719-594-8468 www.aeroflex.com info-ams@aeroflex.com aeroflex microelectronic solutions reserves the right to change at any time without notice the specifications, design, function, or form of its products described herein. all parameters must be validated for each customer's application by engineering. no liability is assumed as a result of use of this product. no patent licenses are implied. our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused export control: export warning: this product is controlled for expor t under the international traffic in arms regulations (itar). a license from the u.s. department of state is required prior to the export of this product from the united states. aeroflex?s military and space pr oducts are controlled for export under the international traffic in arms regulations (itar) and may not be sold or proposed or offered for sale to certain countries. (see itar 126.1 for complete information.) package outline note : outside ceramic tie bars not shown for clarity. contact factory for details. ordering information model dscc smd # screening package mux8521-7 - commercial flow, +25c testing only quad flat pack MUX8521-S - military temperature, -55c to +125c screened in accordance with the individual test methods of mil-std-883 for space applications mux8521-201-1s 5962-0922902kxc in accordance with dscc smd 0.800 sq pin 50 pin 7 pin 35 pin 22 pin 8 pin 21 pin 36 pin 49 pin 1 (13 spaces at .050) tol non-cum 4 sides .0165 .003 0.650 .005 .200 max (.650) .006 .002 .010
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