View HCF4521BEY_1961307.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/12 october 2002 n high noise immunity n voltage supply range 3v to 18v n all stage are presettable n reset disables the rc oscillator for low standby power drain n rc and crystal oscillator output are capable of driving external loads n quiescent current specif. up to 20v n 5v, 10v and 15v parametric ratings n input leakage current i i = 100na (max) at v dd = 18v t a = 25c n 100% tested for quiescent current n meets all requirements of jedec jesd13b "standard specifications for description of b series cmos devices" description hcf4521b is a monolithic integrated circuit fabricated in metal oxide semiconductor technology available in dip and sop packages. hcf4521b has a chain of 24 flip-flops with an input circuit that allows three modes of operation. the input circuit functions as a crystal or rc oscillator or as an input buffer for an external oscillator. each flip-flop preforms a divide-by-two function giving a total count of 2 24 = 16,777,216. the count advances on the negative going edge of the clock. access is available to the final seven stages giving the device added flexibility. hcf4521b 24-stage frequency divider pin connection order codes package tube t & r dip HCF4521BEY sop hcf4521bm1 hcf4521m013tr dip sop
hcf4521b 2/12 iinput equivalent circuit pin description block diagram pin no symbol name and function 10, 11, 12, 13, 14, 15, 1 q18 to q24 outputs counter 2 reset reset input 4 out2 output crystal oscillator 7 out1 output rc oscillator 9 in1 clock input 6 in2 clock input 3 v ss 1 ext. neg. supply voltage 5 v dd 1 ext. pos. supply voltage 8 v ss negative supply voltage 16 v dd positive supply voltage
hcf4521b 3/12 functional test sequence a test function (see functional test circuit) has been included for the reduction of test time required to exercise all 24 coun ter stages. this test function divides the counter into three 8-stage sections and 255 counts are loaded in each of the 8-stage sections in para llel. all flip-flop are now at a logic "1". the counter in now returned to the normal 24-stages in series configuration. one more pulse is entered into input 2 (in2) which will cause the counter to ripple from an all "1" state to an all "0" state. inputs outputs comments reset in 2 out v ss 1 v dd 1 q18 - q24 hll v dd v ss l counter is in three 8-stage sections in parallel mode counter in reset. in 2 and out 2 are tied together lhh v dd v ss l first low-to-high transition at in 2 lll v dd v ss l 255 low-to-high transition are clocked in at in 2 lhh v dd v ss l lhh v dd v ss h the 255th low-to-high transition lll v dd v ss h lll v ss v ss h lhl v ss v dd h counter converted back to 24-stage in series mode lhl v ss v dd h out 2 reverts to output opera- tion llh v ss v dd l counter ripples from an all-high state to an all-low state
hcf4521b 4/12 functional diagram
hcf4521b 5/12 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi ons is not implied. all voltage values are referred to v ss pin voltage. recommended operating conditions symbol parameter value unit v dd supply voltage -0.5 to +22 v v i dc input voltage -0.5 to v dd + 0.5 v i i dc input current 10 ma p d power dissipation per package 200 mw power dissipation per output transistor 100 mw t op operating temperature -55 to +125 c t stg storage temperature -65 to +150 c symbol parameter value unit v dd supply voltage 3 to 20 v v i input voltage 0 to v dd v t op operating temperature -55 to 125 c
hcf4521b 6/12 dc specifications the noise margin for both "1" and "0" level is: 1v min. with v dd =5v, 2v min. with v dd =10v, 2.5v min. with v dd =15v symbol parameter test condition value unit v i (v) v o (v) |i o | ( m a) v dd (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. i l quiescent current 0/5 5 0.04 5 150 150 m a 0/10 10 0.04 10 300 300 0/15 15 0.04 20 600 600 0/20 20 0.08 100 3000 3000 v oh high level output voltage 0/5 <1 5 4.95 4.95 4.95 v 0/10 <1 10 9.95 9.95 9.95 0/15 <1 15 14.95 14.95 14.95 v ol low level output voltage 5/0 <1 5 0.05 0.05 0.05 v 10/0 <1 10 0.05 0.05 0.05 15/0 <1 15 0.05 0.05 0.05 v ih high level input voltage 0.5/4.5 <1 5 3.5 3.5 3.5 v 1/9 <1 10 7 7 7 1.5/13.5 <1 15 11 11 11 v il low level input voltage 4.5/0.5 <1 5 1.5 1.5 1.5 v 9/1 <1 10 3 3 3 13.5/1.5 <1 15 4 4 4 i oh output drive current 0/5 2.5 <1 5 -1.36 -3.2 -1.1 -1.1 ma 0/5 4.6 <1 5 -0.44 -1 -0.36 -0.36 0/10 9.5 <1 10 -1.1 -2.6 -0.9 -0.9 0/15 13.5 <1 15 -3.0 -6.8 -2.4 -2.4 i ol output sink current 0/5 0.4 <1 5 0.44 1 0.36 0.36 ma 0/10 0.5 <1 10 1.1 2.6 0.9 0.9 0/15 1.5 <1 15 3.0 6.8 2.4 2.4 i i input leakage current 0/18 any input 18 10 -5 0.1 1 1 m a c i input capacitance any input 5 7.5 pf
hcf4521b 7/12 dynamic electrical characteristics (t amb = 25c, c l = 50pf, r l = 200k w , t r = t f = 20 ns) (*) typical temperature coefficient for all v dd value is 0.3 %/c. symbol parameter test condition value (*) unit v dd (v) min. typ. max. t plh output rise time 5 100 200 ns 10 50 100 15 40 80 t phl output fall time 5 100 200 ns 10 50 100 15 40 80 t phl , t plh propagation delay time clock to q18 54.59.0 m s 10 1.7 3.5 15 1.3 2.7 t phl , t plh propagation delay time clock to q24 56.012 m s 10 2.2 4.5 15 1.7 3.5 t phl propagation delay time reset to qn 5 1300 2600 ns 10 500 1000 15 375 750 t wh(d) clock pulse width 5 385 140 ns 10 150 55 15 120 40 f cl clock pulse frequency 5 3.5 2 mhz 10 9 5 15 12 6.5 t thl , t tlh clock rise and fall time 5 15 m s 10 15 15 15 t w(r) reset pulse width 5 1400 700 ns 10 600 300 15 450 225
hcf4521b 8/12 rc oscillator circuit functional test circuit
hcf4521b 9/12 typical data for crystal oscillator circuit * complete oscillator includes crystal, capacitors and resistors. crystal oscillator circuit characteristic 500 khz circuit 50 khz circuit unit crystal characteristics resonant frequency 500 50 khz equivalent resistance, rs 1 6.2 k w external resistor/capacitor values r o 47 750 k w c t 82 82 pf c s 20 20 pf frequency stability frequency change as a function of v dd (t a = 25c v dd change from 5v to 10v 6 2 ppm v dd change from 10v to 15v 2 2 ppm frequency change as a function of temperature v dd = 10v t a change from -55c to 25c hcf4521b only -4 -2 ppm complete oscillator * 100 120 ppm t a change from 25c to 125c hcf4521b only -2 -2 ppm complete oscillator * 160 -560 ppm
hcf4521b 10/12 dim. mm. inch min. typ max. min. typ. max. a1 0.51 0.020 b 0.77 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 d 20 0.787 e 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 f 7.1 0.280 i 5.1 0.201 l 3.3 0.130 z 1.27 0.050 plastic dip-16 (0.25) mechanical data p001c
hcf4521b 11/12 dim. mm. inch min. typ max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45? (typ.) d 9.8 10 0.385 0.393 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.62 0.024 s ? (max.) so-16 mechanical data po13h 8
hcf4521b 12/12 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no res ponsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devi ces or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com

▲Up To Search▲

Price & Availability of HCF4521BEY

	To Download HCF4521BEY Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .