unisonic technologies co., ltd u74hct595 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-666.a 8-bit shift registers with latched 3-state output registers ? description the utc 74hct595 contains an 8-bit register with asynchronous reset input and an 8-bit latch with output enable input. data on the serial data input (ser) will be shi ft into the internal shift register during every low-to-high transition on the shift clock. the latch will latch the 8-bit data from the shift register during the low-to-high transition on the latch clock. the shift register also provides a serial output. ? features * operation voltage range:4.5v~5.5v * high noise immunity * output compatibility with cmos and ttl * 8-bit serial-in, parallel-out shift * inputs are ttl voltage compatiable ? ordering information ordering number lead free halogen free package packing u74hct595l-p16-r U74HCT595G-P16-R tssop-16 tape reel u74hct595l-p16-t u74hct595g-p16-t tssop-16 tube
u74hct595 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-666.a ? pin configuration 7 6 5 4 3 2 1 14 13 12 10 11 15 16 qb qc qd qg vcc 8 9 gnd srclr oe qe qf qh qa ser rclk srclk qh ? function table inputs outputs function srclk rclk oe srclr ser qh? qn a low-level on srclr only affects the shift registers. x x l l x l nc empty shift register loaded into storage register. x l l x l l shift register clear. parallel outputs in high-impedance off-state x x h l x l z logic high level shifted into the first shift register. contents of all shift register stages shifted through, e.g. previous state of stage g(internal qg?) appears on the serial output(qh?). x l h h qg? nc contents of shift register stages (internal qn?) are transferred to the storage register and parallel output stages. x l h x nc qn? contents of shift register shifted through. previous contents of the shift register is transferred to the storage register and the pa rallel output stages. l h x qg? qn? note:h : high voltage level. l : low voltage level. x : don?t care. z : high impedance off-state. nc: no change. : low-to-high transition. : high-to-low transition.
u74hct595 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-666.a ? logic diagram r d q sra r d q srb r d q src r d q srd r d q sre r d q srf r d q srg r d q srh q lra q lrb q lrc q lrd q lre q lrf q lrg q lrh srclk ser rclk qa qb qc qd qe qf qg qh qh d dd d d dd d srclr oe ? timing diagram oe srclr
u74hct595 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-666.a ? absolute maximum rating ( unless otherwise specified ) parameter symbol ratings unit supply voltage v cc -0.5~7.0 v input voltage v in -0.5~vcc+0.5 v output voltage(active mode) v out -0.5~v cc +0.5 v input clamp current (v in < 0) i ik 20 ma output clamp current (v out < 0) i ok 20 ma output current i out 35 ma v cc or gnd current i cc 70 ma storage temperature t stg -65 ~ +150 c notes: 1. absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. the input and output voltage ratings may be ex ceeded if the input and output current ratings are observed. ? recommended operating comditions parameter symbol min typ max unit supply voltage v cc 4.5 5 5.5 v input voltage v in 0 v cc v output voltage v out 0 v cc v operating temperature t opr -40 85 c input transition rise or fall rate v cc =4.5v t r /t f 6.0 500 ns ? electrical characteristics ( t a =25 , unless otherwise specified ) parameter symbol test conditions min typ max unit high-level input voltage v ih v cc =4.5v~5.5v 2.0 1.6 v low-lever output voltage v il v cc =4.5v~5.5v 1.2 0.8 v v cc =4.5v, i oh =-20 a 4.4 4.499 v high-level output voltage,qa-qh v oh v cc =4.5v, i oh =-6ma 3.98 4.3 v v cc =4.5v, i ol =20 a 0.001 0.1 v low-level output voltage,qa-qh v ol v cc =4.5v, i oh =6ma 0.17 0.26 v v cc =4.5v, i oh =-20 a 4.4 4.499 v high-level output voltage,qh? v oh v cc =4.5v, i oh =-4ma 3.98 4.3 v v cc =4.5v, i ol =20 a 0.001 0.1 v low-level output voltage,qh? v ol v cc =4.5v, i oh =4ma 0.17 0.26 v input leakage current i i(leak) v cc =5.5v, v in =v cc or gnd 0.1 100 na output off -state current i oz v cc =5.5v, v out =v cc or gnd 0.01 0.5 a quiescent supply current i cc v cc =5.5v, v in =v cc or gnd, i out =0 8 a a dditional quiescent supply current i cc one input at v cc -2.1v,other inputs at 0 or v cc 100 450 ua input capacitance c in v cc =5.5v, v in =v cc or gnd 3 10 pf
u74hct595 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-666.a ? dynamic characteristics ( t a =25 , cl=50pf,rl=1k ? ,unless otherwise specified ) parameter symbol test conditions min typ max unit maximum clock pulse frequency f (max) v cc =4.5v 30 52 mhz propagation delay from input (rclk) to output(qn) t phl /t plh v cc =4.5v 24 40 ns propagation delay from input (srclk) to output(qh?) t plh /t phl v cc =4.5v 24 42 ns 3-state output enable time from input ( oe ) to output(qn) t pzh /t pzl v cc =4.5v 21 35 ns 3-state output disable time from input ( oe ) to output(qn) t phz /t plz v cc =4.5v 18 30 ns propagation delay from input ( srclr ) to output(qh?) t phl v cc =4.5v 23 40 ns output transition time, qh? t tlh / t thl v cc =4.5v 8 15 ns output transition time, qn t tlh / t thl v cc =4.5v 8 12 ns ? operating characteristics parameter symbol test conditions ratings unit power dissipation capacitance c pd no load 400 pf
u74hct595 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-666.a ? test circuit and waveforms c l (note) from output r l v cc k1 k2 note: c l includes probe and jig capacitance. 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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