? 2007 california micro devices corp. all rights reserved. 6/05/07 490 n. mccarthy blvd., milpitas, ca 95035-5112 l tel: 408.263.3214 l fax: 408.263.7846 l www.cmd.com 1 cm1249 preliminary low capacitance transient voltage suppressors / esd protectors features ? low i/o capacitance at 5pf typical ? in-system esd protection to 8kv contact discharge, per the iec 61000-4-2 international standard ? four channels of esd protection ? compact sot-953 package saves board space and facilitates layout in space-critical applications ? each i/o pin can withstand over 1000 esd strikes ? rohs (restriction of hazard substances) compli- ant applications ? high-speed consumer electronic ports ? esd protection of pc ports, including usb ports, serial ports, parallel ports, ieee1394 ports, docking ports, proprietary ports, etc. ? protection of interface ports or ic pins which are exposed to high esd levels electrical schematic v n 3 cm1249-04 sot-953 54 2 1 package / pinout diagram note: this drawing is not to scale. 5-lead sot-953 1 2 5 3 4 part to p v i ew marking ch1 ch2 ch3 ch4 v n v n
? 2007 california micro devices corp. all rights reserved. 2 490 n. mccarthy blvd., milpitas, ca 95035-5112 l tel: 408.263.3214 l fax: 408.263.7846 l www.cmd.com 6/05/07 cm1249 preliminary ordering information note 1: parts are shipped in tape & reel form unless otherwise specified. specifications pin descriptions leads name description (refer to package / pinout diagrams) chx the cathode of the respective tvs diode, which should be connected to the node requiring transient voltage protection. (refer to package / pinout diagrams) v n the anode of the tvs diodes. part numbering information leads package lead-free finish ordering part number 1 part marking 5 sot953 CM1249-04S9 l9 absolute maximum ratings parameter rating units storage temperature range ?65 to +150 c package power dissipation 0.2 w sot953-5 0.225 w standard operating conditions parameter rating units operating temperature ?40 to +85 c
? 2007 california micro devices corp. all rights reserved. 6/05/07 490 n. mccarthy blvd., milpitas, ca 95035-5112 l tel: 408.263.3214 l fax: 408.263.7846 l www.cmd.com 3 cm1249 preliminary note 1: all parameters specified at t a = ? 40c to +85c unless otherwise noted. note 2: these parameters guaranteed by design and characterization. note 3: human body model per mil-std-883, method 3015, c discharge = 100pf, r discharge = 1.5k , v n grounded. note 4: standard iec 61000-4-2 with c discharge = 150pf, r discharge = 330 , v n grounded. note 5: these measurements performed with no external capacitor on ch x . electrical operat ing characteristics (note 1) symbol parameter conditions min typ max units c in channel input capacitance t a = 25c, 0vdc, 1mhz; note 2 5 7 pf c in differential channel i/o to gnd capacitance t a = 25c, 2.5vdc, 1mhz; note 2 0.14 pf i leak leakage current v in = 3.5vdc, t a = 25c 0.75 a v sig small signal clamp voltage positive clamp negative clamp i = 5ma, t a = 25c i = ?5ma, t a = 25c 6.1 ?1.5 8.5 ?0.4 v v v esd esd withstand voltage contact discharge per iec 61000- 4-2 standard human body model, mil-std-883, method 3015 notes 2, 4 & 5; t a = 25c notes 2, 3 & 5; t a = 25c 8 15 kv kv r d diode dynamic resistance forward conduction reverse conduction t a = 25c; note 2 0.7 2.1
? 2007 california micro devices corp. all rights reserved. 4 490 n. mccarthy blvd., milpitas, ca 95035-5112 l tel: 408.263.3214 l fax: 408.263.7846 l www.cmd.com 6/05/07 cm1249 preliminary performance information diode capacitance typical diode capacitance with respect to positive tvs cath ode voltage (reverse voltage across the diode) is given in figure 1 . figure 1. diode capacitance vs. reverse voltage typical high current diode characteristics measurements are made in pulsed mode with a nominal pulse width of 0.7ms. capacitance (normalized) dc voltage typical input vi characteristics (pulse-mode measurements, pulse width = 0.7ms nominal) -1.6 -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 -3-2-10123456789 input voltage (v) input current (a) r d = 1 slope r d = 1 slope
? 2007 california micro devices corp. all rights reserved. 6/05/07 490 n. mccarthy blvd., milpitas, ca 95035-5112 l tel: 408.263.3214 l fax: 408.263.7846 l www.cmd.com 5 cm1249 preliminary mechanical details sot-953 mechanical specifications dimensions for the cm1249, supplied in a 5-pin sot- 953 package are presented below. package dimensions for sot-953 package dimensions package sot-953 leads 5 dim. millimeters inches min nom max min nom max a 0.40 0.45 0.50 0.016 0.018 0.020 b 0.10 0.15 0.20 0.004 0.006 0.008 c 0.05 0.10 0.15 0.002 0.004 0.006 d 0.95 1.00 1.05 0.037 0.039 0.041 e 0.75 0.80 0.85 0.029 0.031 0.033 e1 0.95 1.00 1.05 0.037 0.039 0.041 e 0.35 bsc 0.014 bsc l 0.05 0.10 0.15 0.002 0.004 0.006 l1 0.125 0.150 0.175 0.005 0.006 0.007 # per tape and reel 5000 pieces controlling dimension: millimeters mechanical package diagrams top view e e1 b a side view d l1 end view c 13 seating e 1 0.10 c c plane 2 54 pin 1 marking ab m 0.10 m c l
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