? 2004 california micro devices corp. all rights reserved. 10/29/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 1 cm3403 micropower supply vo ltage supervisor (svs) features ? precision voltage sensor ? two threshold options: 2.93v or 4.63v ? stable over temperature ? valid output logic while v cc = 0v. ? power-on reset pulse width of 140ms (min.) to 460ms (max.) ? low quiescent current (40a typ.) ? no external components required ? 3-pin sot23 package ? "809" compatible pinout ? lead-free versions available applications ? critical p and c power monitoring ? pci applications ? memory integrity during "brownouts" product description the cm3403 is a micropower low voltage supply supervisor designed to provide the necessary power- on reset control for microprocessors and memory applications. an internal pull-down resistor on the reset output ensures the output remains valid under all supply conditions. during either a cold-start power-up or a complete power-down seque nce, the reset output will remain at 0v while the v cc input voltage is between the threshold level and ground. when the v cc input exceeds the preset threshold volt- age, an internal timer is triggered and the reset out- put remains active for a mi nimum of 140ms, at which point the output is taken inactive. in the event of a "brown-out" condition and the v cc voltage collapses below the threshold the reset out- put is immediately asserted. both the trigger threshold and the precision delay pulse are internally controlled elim inating the requirement for external components. the cm3403 is housed in a 3-pin sot23 package and is available with optional lead-free finishing. simplified electrical schematic typical application circuit v cc threshold + gnd - rising edge reset delay reference r pulldown v cc reset gnd microprocessor v in v cc reset gnd cm3403
? 2004 california micro devices corp. all rights reserved. 2 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 10/29/04 cm3403 ordering information note 1: parts are shipped in tape & reel form unless otherwise specified. pin descriptions pin(s) name description 1 gnd negative reference for all signals. 2 reset active low reset output. when the sense threshold has been exceeded, the reset signal will remain active for an additional 140ms (min.) after which it becomes inactive. during a "brownout" condition, reset will immediately beco me active. internal circuitry ensures reset will remain active even when the supply voltage is as low as 0v. 3v cc supply input signal which is monitored by the sense comparator. this input is compared to the 2.93v (cm3403-29st/so) or 4.63 (c m3403-46st/so) reference to de termine the state of the out- put. package / pinout diagram note: this drawing is not to scale. 3-pin sot23 gnd reset v cc 1 2 3 top view 17xx part numbering information pins threshold voltage package standard finish lead-free finish ordering part number 1 part marking ordering part number 1 part marking 3 2.93v sot23-3 cm3403-29st 172y cm3403-29so 172r 3 4.63v sot23-3 CM3403-46ST 174y cm3403-46so 174r
? 2004 california micro devices corp. all rights reserved. 10/29/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 3 cm3403 specifications note 1: electrical operating characterist ics are specified over the standard operat ing conditions unless specified otherwise. absolute maximum ratings parameter rating units pin voltages v cc reset [gnd - 0.5] to +6.5 [gnd - 0.5] to [v cc + 0.5] v v storage temperature range -40 to +150 c operating temperature range ambient -40 to +125 c standard operat ing conditions parameter value units v cc 0 to 6.0 v ambient operating temperature range 0 to +70 c electrical operat ing characteristics (see note 1) symbol parameter conditions min typ max units v th sense threshold cm3403-29, t a =25c 2.89 2.93 2.96 v cm3403-29 2.85 2.93 3.00 v cm3403-46, t a =25c 4.56 4.63 4.7 v cm3403-46 4.5 4.63 4.75 v i cc supply current no load, v cc =5v 40 80 a t delay reset release delay 140 460 ms t phl propagation delay when assert- ing reset v cc < (v th - 50mv) 0.2 5 s r pulldown reset pull-down resistance v cc > 1.5v 0.5 3 k ? r pullup reset pull-up resistance v cc > v th and t > t delay 0.5 3 k ?
? 2004 california micro devices corp. all rights reserved. 4 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 10/29/04 cm3403 performance information cm3403 typical characteristics (nominal conditions unless specified otherwise) reset response with overdrive 0 1 2 3 4 0 50 100 150 200 reset threshold overdrive [mv] transient duration [us] ground current vs. voltage 0 10 20 30 40 50 012345 supply voltage [v] ground current [ua] below trigger reset* pull-down 0 1 10 100 1000 0123 supply voltage [v] pull down resistance [k ? ] above trigger reset* pull-up 0.0 0.1 0.2 0.3 0.4 0.5 0.6 23456 supply voltage [v] pull up resistance [k ? ]
? 2004 california micro devices corp. all rights reserved. 10/29/04 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 5 cm3403 performance information (cont?d) cm3403 typical thermal characteristics (nominal conditions unless specified otherwise) reset propagation delay vs. temperature 180 185 190 195 200 205 210 215 220 25 50 75 100 125 temperature [ o c] t phl - reset propogation delay [ns] reset release delay vs. temperature 300 350 400 450 500 550 600 25 50 75 100 125 temperature [ o c] t delay - reset release delay [ms] ground current vs. temperature 0 5 10 15 20 25 30 35 40 25 50 75 100 12 5 temperature [ o c] i gnd [ua] threshold variation vs. temperature -20 -15 -10 -5 0 5 10 15 20 25 50 75 100 12 5 temperature [ o c] reset threshold change [mv]
? 2004 california micro devices corp. all rights reserved. 6 430 n. mccarthy blvd., milpitas, ca 95035-5112 tel: 408.263.3214 fax: 408.263.7846 www.calmicro.com 10/29/04 cm3403 mechanical details sot23-3 mechanical specifications dimensions for cm3403 devices packaged in 3-lead sot23 packages are presented below. for complete information on the sot23-3 package, see the california micro devices sot23 package information document. package dimensions for sot23-3. package dimensions package sot23-3 jedec no. to-236 (var. ab) pins/leads 3 dimensions millimeters inches min max min max a 0.89 1.12 0.0350 0.0441 a1 0.01 0.10 0.0004 0.0039 b 0.30 0.50 0.0118 0.0197 c 0.08 0.20 0.0031 0.0079 d 2.80 3.04 0.1102 0.1197 e 2.10 2.64 0.0827 0.1039 e1 1.20 1.40 0.0472 0.0551 e 0.95 bsc 0.0374 bsc e1 1.90 bsc 0.0748 bsc l 0.40 0.60 0.0157 0.0236 l1 0.54 ref 0.0213 ref # per tape and reel 3000 pieces controlling dimension: millimeters mechanical package diagrams top view e e1 e a side view l1 end view d a1 c 12 e1 b l 3
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