1 of 5 rev: 022306 general description the ds1813 econoreset uses a precision 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 conditi on, the reset signal is kept in the active stat e for approximately 150ms to allow the power s upply and processor to stabilize. the ds1813 also monitors a pushbutton on the reset output. if the reset line is pulled low, a reset is generated upon release a nd will be held in reset output low for typically 150ms. features automatically restarts a microprocessor after power failure monitors pushbutton for external override maintains reset for typically 150ms after v cc returns to an in-tolerance condition reduces need for discrete components precision temperature- compensated voltage reference and voltage sensor low-cost to-92 or space-saving surface- mount sot-23 packages available efficient open-drain output with internal 5.5k ? pullup resistor -40 c to +85 c operating temperature pin configurations pin description pin to-92 sot-23 name function 1 1 rst active-low reset output 2 2 v cc power supply 3 3 gnd ground ds1813 5v econoreset with pushbutton www.maxim-ic.com 12 3 top view sot-23 package see mech. drawings section on website 1 2 3 1 2 3 bottom vie w to-92 package see mech. drawings section on website dallas ds1813 econo reset
ds1813 2 of 5 operation?power monitor the ds1813 provides the functions of detecting out -of-tolerance power-supply conditions and warning a processor-based system of im pending 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. operation?push button reset the ds1813 provides for a pushbutton switch for manual reset control. when the ds1813 is not in a reset cycle, a pushbutton reset can be generated by pulling the rst pin low for at least 1s. when the pushbutton is held low, the rst is forced active low and will remain active low for about 150ms after the pushbutton is released. see figure 2 for an applica tion example and figure 3 for the timing diagram. figure 1. block diagram (open-drain output) figure 2. application example
ds1813 3 of 5 figure 3. timing diagram: pushbutton reset figure 4. timing diagram: power-up figure 5. timing diagram: power-down
ds1813 4 of 5 absolute maxi mum ratings voltage range on v cc pin relative to ground?????????????????...-0.5v to +7.0v voltage range on rst relative to ground?????????????.?.??-0.5v to (v cc +0.5v) operating temperature range????????????????????????-40c to +85c storage temperature range????????????????????????.-55c to +125c soldering temperature????????????????.see ip c/jedec j-std-020 specification this is a stress rating only and functional ope ration of the device at these or any ot her conditions above those indicated in t he operation sections of this specification is not implied. exposure to absolute maximum ra ting conditions for extended periods of time may affect reliability. recommended dc oper ating conditions (t a = -40 c to +85 c) parameter symbol min typ max units notes supply voltage v cc 0 5.5 v 1 dc electrical characteristics (v cc = 1.2v to 5.5v, t a = -40 c to +85 c.) parameter symbol min typ max units notes output current at 0.4v i ol 10 ma 2, 3 voltage input low v il 0.4 v 1 voltage input high v ih 0.7 x v cc v 1 operating current v cc < 5.5 i cc 30 40 a 4 ds1813-5 4.50 4.62 4.75 ds1813-10 4.25 4.35 4.49 v cc trip point ds1813-15 v cctp 4.00 4.13 4.24 v 1 internal pullup resistor r p 3.50 5.5 7.5 k ? 6 output capacitance c out 10 pf ac electrical characteristics (v cc = 1.2v to 5.5v, t a = -40 c to +85 c.) parameter symbol min typ max units notes reset active time t rst 100 150 300 ms v cc detect to rst t rpd 2 5 s v cc slew rate (v cctp ( max ) - v cctp(min) ) t f 300 s 7 v cc slew rate (v cctp(min) - v cctp(max) ) t r 0 ns v cc detect to rst t rpu 100 150 300 ms 5 pushbutton detect to rst t pb 1 s pushbutton reset t pbrst 100 150 300 ms
ds1813 5 of 5 maxim/dallas semiconductor cannot assume res ponsibility for use of any circuitry other than circuitry entirely embodied in a ma xim/dallas semiconductor product. no circuit patent licenses are implied. maxi m/dallas semiconductor reserves the right to change the circuitry and specification s without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2006 maxim integrated products ? printed usa the maxim logo is a registered trademark of maxim integrated produ cts, inc. the dallas logo is a registered trademark of dallas semiconductor corporation. notes: 1) all voltages are referenced to ground. 2) measured with v cc 2.7v. 3) a 1k ? external resistor may be required in some applications for proper operation of the microprocessor reset control circuit. 4) measured with rst output open. 5) t r = 5 s. 6) v oh and i oh are a function of the value of r p and the associated output load conditions. 7) this value is for referenc e in defining values for t rpd and should not be consid ered a requirement for proper operation or us e of the device. part marking codes ?a,? ?b,? and ?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%
english ? ???? ? ??? ? ??? what's new products solutions design appnotes support buy company members ds1813 part number table notes: see the ds1813 quickview data sheet for further information on this product family or download the ds1813 full data sheet (pdf, 212kb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. 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 . 4. * some packages have variations, listed on the drawing. "pkgcode/variation" tells which variation the product uses. 5. part number notes free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis ds1813r-10/t&r/c03 sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813r-15+t&r 5v-15% 3000/reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813r-10+t&r 5v-10% 3000/reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813r-15-u 5v-15% partial reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis
ds1813r-10-u 5v-10% partial reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813r-5-u 5v-5% partial reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813r-15/t&r 5v-15% 3000/reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813r-10/t&r 5v-10% 3000/reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813r-5-u+ sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813r-5+t&r 5v-5% 3000/reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813r-15-u+ sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813r-10-u+ sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813r-5/t&r 5v-5% 3000/reel sot23;3 pin;50 dwg: 21-0051g (pdf) use pkgcode/variation: u3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813-5+t&r 5v-5% 2000/reel to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813-10+t&r 5v-10% 2000/reel to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3+4 * -40c to +85c rohs/lead-free: yes materials analysis
ds1813-5+ to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3+1 * -40c to +85c rohs/lead-free: yes materials analysis ds1813-15+t&r 5v-15% 2000/reel to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3+4 * -40c to +85c rohs/lead-free: yes materials analysis ds1813-15/t&r 5v-15% 2000/reel to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813-10/t&r 5v-10% 2000/reel to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813-5/t&r 5v-5% 2000/reel to92;3 pin;185 dwg: 56-g0006-003a (pdf) use pkgcode/variation: q3-4 * -40c to +85c rohs/lead-free: no materials analysis ds1813-15 5v-15% monitor to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3-1 * -40c to +85c rohs/lead-free: no materials analysis ds1813-10 5v-10% monitor to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3-1 * -40c to +85c rohs/lead-free: no materials analysis ds1813-5 5v-5% monitor to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3-1 * -40c to +85c rohs/lead-free: no materials analysis ds1813-10+ to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3+1 * -40c to +85c rohs/lead-free: yes materials analysis ds1813-15+ to92;3 pin;185 dwg: 56-g0006-001a (pdf) use pkgcode/variation: q3+1 * -40c to +85c rohs/lead-free: yes materials analysis didn't find what you need?
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