v0.3 1(7) ultra-small package built-in delay high-precision voltage detector ce8809 series ? introduction ? application ? block diagrams ultra-small built-in delay high-precision voltage detector LR8809 series the LR8809 series is a series of high-precision voltage detectors with a built-in delay time generator of fixed time. developed using cmos process. the detection voltage is fixed internally, with an accuracy of 2.0 %. internal oscillator and counter timer can delay the release signal without external parts, delay times 200 ms two output forms, nch pen-drain and cmos output are available. ? features ? ultra-low current consumption: 1.0 a@3.5v(typ) ? high-precision detec tion voltage: 2.0 % ? hysteresis characteristics: -v det 5%(typ) ? operating voltage range: 0.95 v to 8.0 v ? detection voltage: 1.5v to 6.0 v (0.1 v step) ? delay time: 200 ms(typ) ? output forms: nmos open-drain output (active low) cmos output (active low) ? memory battery back-up circuits ? power-on reset circuits ? power failure detection ? power monitor for portable equipment such as notebook computers, digital cameras, pda, and cellular phones. ? constant voltage power monitors for cameras, video equipment and communication devices. ? power monitor for microcomputers and reset for cpus. ? ordering information ce8809 ??? designator symbol description c cmos n nch open drain ? integer output voltage(1.5v~6.0v) e.g. 3.0v= :3, :0 m/ma package sot23-3 n/na package sot343(sc-82) p package sot89-3 t/ta package to-92 e package sot23-6 nch open-drain cmos output note:*1-parasitic diode lr c leshan radio company,ltd. LR8809
v0.3 2(7) ? pin configurations table 1 LR8809 series sot-23-3 pin no. m ma functions 1 v dd v dd voltage input pin v out - voltage detection output pin 2 - v ss gnd pin v ss - gnd pin 3 - v out voltage detection output pin table 2 LR8809 series sot-89-3 pin no p functions 1 v out voltage detection output pin 2 v dd voltage input pin 3 v ss gnd pin table 4 LR8809 series sot343 pin no t ta functions v out - voltage detection output pin 1 - v dd voltage input pin v dd - voltage input pin 2 - v ss gnd pin v ss - gnd pin 3 - v out voltage detection output pin pin no n na functions v out - voltage detection output pin 1 - v dd voltage input pin v dd - voltage input pin 2 v ss gnd pin 3 nc - no connection v ss - gnd pin 4 - v out voltage detection output pin table 3 LR8809 series to-92 lr c leshan radio company,ltd.
v0.3 3(7) ? absolute maximum ratings (ta=25c unless otherwise specified) item symbol absolute maximum ratings unit power supply voltage v dd v ss 0.3 ~ v ss 10 v output voltage v out v ss 0.3 ~ v ss 10 v sot-23-3 250 mw sot-89 500 mw to-92 500 mw power dissipation sot343 pd 250 mw operating ambient temperature topr 40 ~ 85 c storage temperature tstg 40 ~ 125 c ? electrical characteristics (ta=25c unless otherwise specified) item symbol condition min. typ. max. unit detection voltage *1 ? v det ? ? v det(s) 0.98 ? v det(s) ? v det(s) 1.02 v hysteresis width v hys ? 0.02 ? v det(s) 0.05 ? v det(s) 0.08 ? v det(s) v ce8809c/n20 26 ? 1.0 2.0 ua ce8809 c/n 26 39 ? 1.2 2.5 ua current consumption i ss v dd = v det 0.5v ce8809 c/n 39 60 ? 1.5 3.0 ua operating voltage v dd ? 0.95 ? 8 v pin no e functions 1 nc no connection 2 v ss gnd pin 3 v out voltage detection output pin 4 v dd voltage input pin 5 nc no connection 6 nc no connection table 5 LR8809 series sot23-6 lr c leshan radio company,ltd.
v0.3 4(7) ce8809 c/n 20 26 3.0 13.0 ? ma ce8809 c/n 26 39 3.0 15.0 ? ma nmos v out =0.5 v v dd = v det 0.5 v ce8809 c/n 39 60 3.0 18.0 ? ma ce8809 c/n 20 26 1.5 4.0 ? ma ce8809 c/n 26 39 1.5 6.0 ? ma output current i out pmos v dd v out =0.5 v v dd = v det 0.5 v ce8809 c/n 39 60 1.5 8.0 ? ma leakage current i leak only for nmos open-drain output products, v dd =8.0 v, v out =8.0 v ? 0.1 ua temperature coefficient ta= ? 40c ~ +85c ? 120 360 ppm/ c delay time t d 200 ms *1. ? vdet: actual detection voltage value, ? vdet(s): specified detection voltage value ? functional description 1. when a voltage higher t han the release voltage (+v det ) is applied to the voltage input pin (v dd ), the voltage will gradually fall..w hen a voltage higher than the detect voltage (-v det ) is applied to v dd , output (v out ) will be equal to the input at v dd . note that high impedance exists at v out with the n-channel open drain configuration. if the pin is pulled up, v out t will be equal to the pull up voltage. 2. when v dd falls below -v det , v out will be equal to the ground voltage (v ss ) level (detect state). note that this also applies to n-channel open drain configurations. 3. when v dd falls to a level below that of the minimum operating voltage (v min ) output will become unstable. because the output pin is generally pulled up with n-channel open drain configurations, output will be equal to pull up voltage. 4. when v dd rises above the v ss level (excepting levels lower than minimum operating voltage), v out will be equal to v ss until v dd reaches the +v det level. 5 . although v dd will rise to a level higher than +v det , v out maintains ground voltage level via the delay circuit. 6. following transient delay time, v dd will be output at v out . note that high impedance exists with the n-channel open drain c onfiguration and that voltage will be dependent on pull up. notes : 1. the difference between -v det and +v det represents the hysteresis range. 2. propagation delay time (t d ) represents the time it takes for v dd to appear at v out once the said voltage has exceeded the +v det level. lr c leshan radio company,ltd.
v0.3 5(7) ? standard circuits 1 cmos output 2 nch open-drain lr c leshan radio company,ltd. LR8809 LR8809 LR8809
v0.3 6(7) ? package information sot-23-3 to-92 lr c leshan radio company,ltd.
v0.3 7(7) sot-89 dimensions in millimeters symbols min nom max a 1.40 1.50 1.60 b 0.36 0.42 0.48 b1 0.41 0.47 0.53 b2 1.40 1.60 1.75 c 0.38 0.40 0.43 d 4.40 4.50 4.60 e 4.25 e1 2.40 2.50 2.60 1.40 1.50 1.60 l 1.80 l1 0.40 sot343 sc-82 lr c leshan radio company,ltd.
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