unisonic technologies co., ltd USA555 linear integrated circuit www.unisonic.com.tw 1 of 8 copyright ? 2014 unisonic technologies co., ltd qw-r106-005.c precision timers ? description the utc USA555 monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. in the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. in the astable mode of operati on, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. the threshold and trigger levels normally are two-thirds and one-third, respectively, of v cc . these levels can be altered by use of the control-voltage terminal. when the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. if the trigger input is above the tri gger level and the threshold input is above the threshold level, the f lip-flop is reset and the output is low. the reset (reset) input can override all other inputs and can be used to initiate a new timing cycle. when reset goes low, the flip-flop is reset, a nd the output goes low. when the output is low, a low-impedance path is provided between discharge (disch) and ground. the circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200ma. operation is specified for supplies of 5v~15v. ? features * astable or monostable operation * low turn off time * operates in both ast able and monostable modes * timing from microseconds to hours * adjustable duty cycle * ttl-compatible output can sink or source up to 200ma sop-8 dip-8 ? ordering information ordering number package packing lead free halogen free - USA555g-s08-r sop-8 tape reel USA555l-d08-t USA555g-d08-t dip-8 tube note: xx: output voltage, refer to marki ng information.
USA555 linear integrated circuit unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r106-005.c ? marking sop-8 dip-8 ? pin configuration 1 2 3 4 8 7 6 5 gnd trig out reset v cc disch thres cont ? pin description pin no. pin name description 1 gnd ground 2 trig trigger signal 3 out output terminal 4 reset reset terminal 5 cont control voltage 6 thres threshold 7 disch discharge 8 v cc power supply ? function table reset trigger voltage (note) threshold voltage (note) output discharge switch low irrelevant irrelevant low on high < 1/3 v cc irrelevant high off high > 1/3 v cc > 2/3 v cc low on high > 1/3 v cc < 2/3 v cc as previously established note: voltage levels shown are nominal.
USA555 linear integrated circuit unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r106-005.c ? block diagram
USA555 linear integrated circuit unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r106-005.c ? absolute maximum rating (over operating free-air temperature range, unless otherwise noted) parameter symbol ratings unit supply voltage (note 2) v cc 18 v input voltage cont, r eset, thres, trig v i v cc v output current i o 225 ma operating virtual j unction temperature t j 150 c storage temperature t stg -65~150 c note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. all voltage values are with respect to gnd. ? recommended operating conditions over operating free-air te mperature range (unless otherwise noted) parameter symbol ratings unit supply voltage v cc 4.5~16 v input voltage v i v cc v output current i o 200 ma operating free-air temperature t a -40~85 c ? thermal data parameter symbol ratings unit package thermal impedance (note 1, 2) sop-8 ja 97 c/w dip-8 85 c/w notes: 1. maximum power dissipation is a function of t j(max) , ja , and t a . the maximum allowable power dissipation at any allowable ambient temperature is p d =(t j(max) -t a )/ ja . operating at the absolute maximum t j of 150c can affect reliability. 2. the package thermal impedance is calc ulated in accordance with jesd 51-7. ? electrical characteristics (v cc =5v~15v, t a =25c, unless otherwise noted) parameter symbol test conditions min typ max unit thres voltage level v th v cc =15v 8.8 10 11.2 v v cc =5v 2.4 3.3 4.2 v thres current (note) i th 30 250 na trig voltage level v trig v cc =15v 4.5 5 5.6 v v cc =5v 1.1 1.67 2.2 v trig current i trig trig at 0v 0.5 2 a reset voltage level v reset 0.3 0.7 1 v reset current i reset reset at v cc 0.1 0.4 ma reset at 0v -0.4 -1.5 ma disch switch off-state current i disch 20 100 na cont voltage (open circuit) v cont v cc =15v 9 10 11 v v cc =5v 2.6 3.3 4 v low-level output voltage v ol v cc =15v, i ol =10ma 0.1 0.25 v v cc =15v, i ol =50ma 0.4 0.75 v v cc =15v, i ol =100ma 2 2.5 v v cc =15v, i ol =200ma 2.5 v v cc =5v, i ol =5ma 0.1 0.35 v v cc =5v, i ol =8ma 0.15 0.4 v high-level output voltage v oh v cc =15v, i ol =-100ma 12.75 13.3 v v cc =15v, i ol =-200ma 12.5 v v cc =5v, i ol =-100ma 2.75 3.3 v
USA555 linear integrated circuit unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r106-005.c ? electrical characteristics(cont.) parameter symbol test conditions min typ max unit supply current i cc output low, no load v cc =15v 10 15 ma v cc =5v 3 6 ma output high, no load v cc =15v 9 13 ma v cc =5v 2 5 ma note: this parameter influences the maximum value of the timing resistors r a and r b in the circuit of figure 2. for example, when v cc =5v, the maximum value is r=r a +r b 3.4m ? , and for v cc =15v, the maximum value is 10m ? . ? operating characteristics (v cc =5v~15v, t a =25c, unless otherwise noted) parameter symbol test conditions (note 1) min typ max unit initial error of timing interval (note 2) each timer, monostable (note 3) t a =25c 1 3 % each timer, astable (note 4) 2.25 % temperature coefficient of timing interval each timer, monostable (note 3) t a =min~max 50 ppm/c each timer, astable (note 4) 150 ppm/c supply-voltage sensitivity of timing interval each timer, monostable (note 3) t a =25c 0.1 0.5 %/v each timer, astable (note 4) 0.3 %/v output-pulse rise time t r c l =15pf, t a =25c 100 300 ns output-pulse fall time t f c l =15pf, t a =25c 100 300 ns notes: 1. for conditions shown as min or max, use t he appropriate value specified under recommended operating conditions. 2. timing interval error is defined as the difference between the measured value and the average value of a random sample from each process run. 3. values specified are for a device in a monostable ci rcuit similar to figure 1, with the following component values: r a =2k ? ~100k ? , c=0.1f. 4. values specified are for a device in an astable ci rcuit similar to figure 2, with the following component values: r a =1k ? ~100k ? , c=0.1f.
USA555 linear integrated circuit unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r106-005.c ? typical application circuit disch gnd trig thres v cc cont reset out v cc (5v~15v) 5 8 3 r l output r a 4 7 6 2 input 1 figure 1. circuit for monostable operation disch figure 2. circuit for astable operation trig thres v cc cont reset out 3 output 1 r l v cc (5v~15v) r a r b c 58 4 7 6 2 0.01f open (see note 1) notes: 1. decoupling cont voltage to gr ound with a capacitor can improve operation. this should be evaluated for individual applications. 2. t1 = 0.693 (r a +r b )c1 t2 = 0.693 r b c1 f = = 3. formula 0.693 values for reference only. gnd 1 t 1.44 (r a + 2r b ) c1
USA555 linear integrated circuit unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r106-005.c ? typical characteristics c1 (uf) ch1: 1v/div
USA555 linear integrated circuit unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r106-005.c utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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