microsemi scottsdale division 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503 page 1 copyright ? 2001 msc1378.pdf 9-4 2001 rev i www. microsemi . com sm03 thru sm36 bidirectional/unidirectional tvsarray ? product preview scottsdale division tvsarray ? series applications ? eia-rs232 data rate 19.6kbs ? eia-rs422 data rate 10mbs ? eia-rs423 data rate 100kbs features ? protects 3.0/3.3 up through 36v components ? protects 2 undirectional or 1 bidirectional line ? provides electrically isolated protection ? sot-23 packaging maximum ratings ? operating temperature: -55c to +150c ? storage temperature: -55c to +150c ? peak pulse power 300 watts (8/20 s figure 1) ? pulse repetition rate: < .01% mechanical ? molded sot-23 surface mount ? weight 0.014 grams (approximate) ? body marked with device number packaging ? tape & reel per eia standard 481 ? 7 inch reel 3,000 pieces (standard) description description (300 watt) this 3 pin transient voltage suppressor offers 2 unidirectional or 1 bidirectional protection at the board level from voltage transients caused by electrostatic discharge (esd) as defined by iec 61000-4-2, electrical fast transients (eft) per iec 61000-4-4. unidirectional protection can be accomplished by connecting the input/output lines to pins 1 and 2 and pin 3 to common ground. in a bidirectional configuration pin 1 or pin 2 is connected to common or ground. pin 3 is not connected. the sm03 thru sm36 product provides board level protection from static electricity and other induced voltage surges that can damage sensitive circuitry. these transient voltage suppressor (tvs) diode arrays protect 3.0/3.3 volt components such as dram?s, sram?s, cmos, hcmos, hsic, and low voltage interfaces up to 36 volts. because of the physical size, weight and protection capabilities, this product is ideal for use in but not limited to miniaturized electronic equipment such as hand held instruments, computers, computer peripherals and cell phones. important: for the most current data, consult microsemi ?s website: http://www.microsemi.com electrical characteristics per line @ 25c unless otherwise specified stand off voltage v wm volts breakdown voltage v br @1 ma volts clamping voltage v c @ 1 amp (figure 2) volts clamping voltage v c @ 5 amp (figure 2) volts standby current i d @ v wm a capacitance @0v 1 mhz) c pin 1-3 or 2-3 pf capacitance @0v 1 mhz) c pin 1-2 p f part number device marking ma x min ma x ma x ma x ma x ma x sm03 m03 3.3 4 7 9 200 600 300 SM05 m05 5.0 6.0 9 .8 11 20 400 200 sm12 m12 12.0 13.3 1 9 2 4 0 .1 160 80 sm15 m15 15.0 16.7 2 4 3 0 0 .1 130 65 sm24 m24 24.0 26.7 4 3 5 5 0 .1 80 40 s m 36 m 36 36 . 0 40 . 0 6 0 7 5 0 . 1 50 28 note: transient voltage suppressor (tvs) product is normally selected based on its stand off voltage v wm . product selected voltage should be equal to or greater than the continuous peak operating voltage of the circuit to be protected.
microsemi scottsdale division 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503 page 2 copyright ? 2001 msc1378.pdf 9-4 2001 rev i www. microsemi . com sm03 thru sm36 bidirectional/unidirectional tvsarray ? product preview scottsdale division symbols & definitions symbol definition v wm rated stand off voltage: maximum dc voltage that can be applied over the operating temperature range. vwm must be selected to be equal or be greater than the operating voltage of the line to be protected v br minimum breakdown voltage: the minimum voltage the device will exhibit at a specified current v c clamping voltage: maximum clamping voltage across the tvs device when subjected to a given current at a pulse time of 20 s. i d standby current: leakage current at v wm. c capacitance: capacitance of the tvs as defined @ 0 volts at a frequency of 1 mhz and stated in pico farads. graphs packaging and schematic figure 2 pulse wave form schematic .1 1 10 100 1000 10000 10000 1000 100 10 8/20s 300w pulse ppp peak pulse power watts figure 1 peak pulse power vs pulse time t=sec graphs package data
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