1 of 5 041002 features automatically restarts a microprocessor after power failure maintains reset for 150ms after v cc returns to an in-tolerance condition reduces need for discrete components precision temperature-compensated voltage reference and voltage sensor accurate 5%, 10% or 20% power monitoring low-cost to-92 or space saving surface- mount sot-23 packages available push-pull output for low current operation operating temperature -40 c to +85 c pin assignment pin description to-92 1 rst active low reset output 2 v cc power supply 3 gnd ground sot-23 1 rst active low reset output 2 v cc power supply 3 gnd ground description the ds1815 econoreset uses a precisi on temperature reference and comparator circuit to monitor the status of the power supply (v cc ). when an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces reset to the active state. when v cc returns to an in-tolerance condition, the reset signal is kept in the active state fo r approximately 150ms to allow the power supply and processor to stabilize. ds1815 3.3v econoreset with push-pull output www.maxim-ic.com 12 3 top view sot-23 package see mech. drawings section on website 1 2 3 1 2 3 bottom view to-92 package see mech. drawings section on website dallas ds1815 econo reset
ds1815 2 of 5 operation ? power monitor the ds1815 provides the functions of detecting out-o f-tolerance power supply conditions and warning a processor-based system of imp ending power failure. when v cc is detected as out of tolerance, the rst signal is asserted. on power-up, rst is kept active for approximately 150ms after the power supply has reached the selected tolerance. this allows the power supply and microprocessor to stabilize before rst is released. block diagram (cmos output) figure 1 application example figure 2 application diagram: rst valid to 0 volts v cc on the ds1815 figure 3
ds1815 3 of 5 timing diagram: power-up figure 4 timing diagram: power-down figure 5
ds1815 4 of 5 absolute maximum ratings* voltage on v cc pin relative to ground -0.5v to +7.0v voltage on rst relative to ground -0.5v to +5v cc +0.5v operating temperature -40c to +85c storage temperature -55c to +125c soldering temperature 260c for 10 seconds * this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. recommended dc operating conditions (-40 c to +85 c) parameter symbol min typ max units notes supply voltage v cc 0.0 5.5 v 1 dc electrical characteristics (-40 c to +85 c; v cc = 1.2v to 5.5v) parameter symbol min typ max units notes output voltage @ -500 a v oh v cc -0.5v v cc -0.1v v1 output current @ 2.4v i oh 350 a 2 output current @ 0.4v i ol +10 ma 2 operating current v cc < 5.5 i cc 28 35 a 3 v cc trip point (ds1815-5) v cctp 2.98 3.06 3.15 v 1 v cc trip point (ds1815-10) v cctp 2.80 2.88 2.97 v 1 v cc trip point (ds1815-20) v cctp 2.47 2.55 2.64 v 1 output capacitance c out 10 pf ac electrical characteristics (-40 c to +85 c; v cc = 1.2v to 5.5v) parameter symbol min typ max units notes reset active time t rst 100 150 250 ms 4 v cc detect to rst t rpd 25 s v cc slew rate (v cctp (max) to v cctp (min)) t f 300 s 6 v cc slew rate (v cctp (min) to v cctp (max)) t r 0ns v cc detect to rst t rpu 100 150 250 ms 4, 5
ds1815 5 of 5 notes: 1. all voltages are referenced to ground. 2. measured with v cc 2.7v. 3. measured with rst output open. 4. measured with 2.7v v cc 3.3v. 5. t r = 5 s. 6. the t f value is for reference in defining values for t rpd and should not be considered a requirement for proper operation or use of the device. part marking codes ?a?, ?b?, &?c? represent the device type. 810 . . . . ds1810 811 . . . . ds1811 812 . . . . ds1812 813 . . . . ds1813 815 . . . . ds1815 816 . . . . ds1816 817 . . . . ds1817 818 . . . . ds1818 ?d? represents the device tolerance. a . . . . . . 5% b . . . . . . 10% c . . . . . . 15% d . . . . . . 20%
ds1815 part number table english ? ? ?Z ? ??? what's new products solutions design appnotes support buy company members notes: 1. see the ds1815 quickview data sheet for further information on this product family or download the ds1815 full data sheet (pdf, 128kb). 2. other options and links for pu rchasing parts are listed at: http://www.maxim-ic.com/sales . 3. didn't find what you need? ask our applications engi neers. expert assistance in finding parts, usually within one business day. 4. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free ; # = rohs/lead-exempt. more: see full data sheet or part naming conventions . 5. * some packages have variations, listed on the drawing. "pkgcode/variation" te lls which variation the product uses. part number notes free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis ds1815r-5-u+ sample buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/va riation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815r-20+t&r 3.3v- 20% buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/va riation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815r-5+t&r 3.3v-5% buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/va riation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis DS1815R-20-U 3.3v- 20% sample buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815r-10-u 3.3v- 10% sample buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815r-5-u 3.3v-5% sample buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis pa g e 1 of 3 ds1815 - part number table - maxim/dallas 01-au g -2007 mhtml:file://c:\temp\maxm\ds1815 r -10-t& r -c02.mht
ds1815r-20/t&r 3.3v- 20% tolerance buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815r-10/t&r 3.3v- 10% tolerance buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815r-5/t&r 3.3v-5% buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815r-10-u+ sample buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/va riation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis DS1815R-20-U+ sample buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/va riation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815r-10+t&r 3.3v- 10% buy sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/va riation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815-10+t&r 3.3v- 10% buy to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815-20+t&r 3.3v- 20% buy to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815-5+t&r 3.3v-5% buy to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1815-20/t&r 3.3v- 20% buy to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815-10/t&r 3.3v- 10% buy to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815-5/t&r 3.3v-5% buy to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1815-20 3.3v- 20% monitor sample buy to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3-1 * -40c to +85c rohs/lead-free: no materials analysis ds1815-10 3.3v- 10% monitor sample buy to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3-1 * -40c to +85c rohs/lead-free: no materials analysis ds1815-5 3.3v-5% to92;3 pin;185 -40c to +85c rohs/lead-free: no pa g e 2 of 3 ds1815 - part number table - maxim/dallas 01-au g -2007 mhtml:file://c:\temp\maxm\ds1815 r -10-t& r -c02.mht
didn't find what you need? monitor sample buy dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3-1 * materials analysis ds1815-5+ sample buy to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3+1 * -40c to +85c rohs/lead-free: yes materials analysis ds1815-10+ sample buy to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3+1 * -40c to +85c rohs/lead-free: yes materials analysis ds1815-20+ sample buy to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3+1 * -40c to +85c rohs/lead-free: yes materials analysis contact us: feedback, questions rate this page mail this page copyright ? 2007 by maxim integrated products, dallas semiconductor ? legal notices ? privacy policy pa g e 3 of 3 ds1815 - part number table - maxim/dallas 01-au g -2007 mhtml:file://c:\temp\maxm\ds1815 r -10-t& r -c02.mht
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