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PHILIPS 74HC/HCT221 Dual non-retriggerable monostable multivibrator with reset datasheet

1. 10 108 timing uia pF Fig 13 HC HCT typical output pulse width as a function of timing capacitance 4 5 V December 1990 13 Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 7 221 7222016 2 1 __ LLLI H I EP ail d A milii miii eee ee H4 Jt 7 A att ED A aa H HH L LLLI timing PCS pF Fig 14 HC typical output pulse width as a function of timing capacitance 6 V December 1990 14 Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 74HC HCT221 2222014 7222015 2 Fig 15 Typical output pulse width as a function of Fig 16 k factor as a function of supply voltage temperature Cy 0 1 uF Rx 10 Rx 10 Tamb 25 C Voc 5 V Power down consideration PACKAGE OUTLINES A large capacitor Cx may cause problems when See 74HC HCT HCU HCMOS Logic Package Outlines powering
2. HERE HHH ii m aa HH HHA Hi MDZ TS P an H 102 4 LA LU LE EL 17111 ae oot ee UNE LL Fr 10 103 108 timing capacitance pF Fig 12 HC typical output pulse width as a function of timing capacitance 2 V December 1990 12 Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 7 221 7222017 1 pulse aoc se 0 ee FLA width Eii i BM BP FERE T TIU 557 4 i t ERER A 4L ______ 74 Coon DEL LAU E ee el 141 L I LII iilii Al du LL 1 A ERR RG A EN B G E EL uL 111 HT
3. Tamb C Product specification 74HC HCT221 TEST CONDITIONS 74HCT 40 to 85 40 to 125 WAVEFORMS propagation delay trigger nB to nQ propagation delay trigger nA to nQ propagation delay trigger nB to nQ propagation delay trigger nRp to nQ propagation delay reset nRp to nQ 0 pF Rext 5 Fig 11 propagation delay reset nRp to nQ 0 pF Rext 5 Fig 11 output transition time trigger pulse width nA LOW Fig 10 trigger pulse width nB HIGH pulse width nRp LOW tw output pulse width 630 700 770 1602 798 595 805 5 5 0 100 nF LOW RExr 10 nQ HIGH Fig 10 tw trigger pulse width 140 ns 4 5 28 pF nQ or nQ Rgxr 2 Fig 10 tw trigger pulse width 1 5 us 45 1 nQ or nQ Rext 2 Fig 10 December 1990 9 Philips Semiconductors Product specification Dual non retriggerable monostable FAHC HCT221 multivibrator with reset TEST CONDITIONS PARAMETER WAVEFORMS 40 to 85 40 to 125 min max min max trigger pulse width 1 nF nQ or nQ Rext 10 Fig 10 removal time Fig 9 nRp to nA or nB external timing resistor external timing capacitor no limits December 1990 10 Philips Semiconductors Dual non retriggerable
4. 40 to 125 V max in max output pulse width 2 0 28 nF nQ 4 5 Rext 2 6 0 10 output pulse width 2 0 1 nF nQ or nQ 4 5 Rext 2 6 0 10 output pulse width 2 0 1 nF nQ or 4 5 10 6 0 10 pulse width match 45 1000 pF between circuits 10 in the package 5 5 removal time 2 0 Fig 9 nRp to nA 4 5 or nB 6 0 external timing resistor 2 0 Fig 12 5 0 Fig 13 external timing capacitor no limits 2 0 Fig 12 5 0 Fig 13 December 1990 7 Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 7 221 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see 74HC HCT HCU HCMOS Logic Family Specifications Output capability standard except for Icc category MSI Note to HCT types The value of additional quiescent supply current Alcc for a unit load of 1 is given in the family specifications To determine Alcc per input multiply this value by the unit load coefficient shown in the table below INPUT UNIT LOAD COEFFICIENT nB 0 30 nA 0 50 nRp 0 50 December 1990 8 Philips Semiconductors Dual non retriggerable monostable multivibrator with reset AC CHARACTERISTICS FOR 74HCT GND 0 V 6 ns Cj 50 pF PARAMETER propagation delay trigger nA nRp to
5. down the monostable due to the energy stored in this capacitor When a system containing this device is powered down or a rapid decrease of Vcc to zero occurs the monostable may substain damage due to the capacitor discharging through the input protection diodes To avoid this possibility use a damping diode Dx preferably a germanium or Schottky type diode able to withstand large current surges and connect as shown in Fig 17 Ox v Cx 4 2222440 Fig 17 Power down protection circuit December 1990 15
6. monostable multivibrator with reset AC WAVEFORMS nB INPUT I pm INPUT onm nQ OUTPUT tw MN tw l 7222009 Fig 7 Output pulse control nRp HIGH nB INPUT INPUT nQ OUTPUT tw C 7222177 ty el Fig 8 Output pulse control using reset input nRp nA LOW Product specification 74HC HCT221 nA INPUT 7222012 1 tw 07 RC 1 Vy 5096 GND to Voc HCT 1 3 V Vj GND to 3 V Fig 10 Waveforms showing the triggering of One Shot by input nA or input nB for one period tw and minimum pulse widths of the trigger inputs nA and nB input level tw trem nB INPUT trem nA INPUT 722201 1 1 1 Vy 5096 GND to HCT 1 3 V Vj GND to 3 V Fig 9 Waveforms showing the removal times nRp to nA or nB December 1990 tPLH 7222010 1 HC Vu Vu 50 Vi GND to Voc 1 3 V GND to 3 V Fig 11 Waveforms showing the reset to nQ and output propagation delays Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 7 221 7222018 1 AS SS e EL H an tw us mamenn OADD D ee ee EA EEE H LLL
7. INTEGRATED CIRCUITS DATA SHEET For a complete data sheet please also download e The IC06 74HC HCT HCU HCMOS Logic Family Specifications e The IC06 74HC HCT HCU HCMOS Logic Package Information e The IC06 74HC HCT HCU HCMOS Logic Package Outlines 221 Dual non retriggerable monostable multivibrator with reset Product specification December 1990 Supersedes data of April 1988 File under Integrated Circuits 06 Philips PHILIPS Semiconductors LI Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 221 5 Pulse width variance is typically less than 5 Pin out identical to 123 Overriding reset terminates output pulse inputs have hysteresis for improved noise immunity Output capability standard except for Icc category MSI GENERAL DESCRIPTION The 7 221 are high speed Si gate CMOS devices and are pin compatible with low power Schottky TTL LSTTL They are specified in compliance with JEDEC standard no 7A The 74HC HCT221 are dual non retriggerable monostable multivibrators Each multivibrator features an active LOW going edge input nA and an active HIGH going edge input nB either of which can be used as an enable input Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the in
8. NCTION TABLE INPUTS OUTPUTS nRp nA nB nQ L X X L H x H X LO X X L LO H L 7 STL ul H apl dl T L H m alar Notes 7293297 Fig 4 Functional diagram December 1990 4 1 HIGH voltage level L LOW voltage level X care T LOW to HIGH level HIGH to LOW level Ll HIGH level output pulse LI one LOW level output pulse If the monostable was triggered before this condition was established the pulse will continue as programmed For this combination the reset input must be LOW and the following sequence must be used pin 1 or 9 must be set HIGH or pin 2 or 10 set LOW then pin 1 or 9 must be LOW and pin 2 or 10 set HIGH Now the reset input goes from LOW to HIGH and the device will be triggered Philips Semiconductors Product specification Dual non retriggerable monostable multivibrator with reset 74HC HCT221 7222013 2 Fig 5 Logic diagram Note It is recommended to ground pins 6 2 and 14 1 externally to pin 8 GND 7293290 T Cext to nCgxT tonRext Cext pin 14 of 6 pin 15 or 7 Fig 6 Timing component connections December 1990 5 Philips Semiconductors Dual non retriggerable monostable multivibrator with reset DC CHARACTERISTICS FOR 74HC For the DC characteristics see 74HC HCT HCU HCMOS Logic Family Specifica
9. Pp Cpp x Voc x fi x Vec x fo 0 33 x Cext x Voc x fo D x28 x Voc where f input frequency MHz fy output frequency in MHz CL x Vec x fo sum of outputs timing capacitance in pF C output load capacitance in pF Vcc supply voltage in V D duty factor in 96 2 For HC the condition is Vj GND to Vcc For the condition is Vj GND to Vcc 1 5 V December 1990 2 Product specification Philips Semiconductors Dual non retriggerable monostable 7 221 multivibrator with reset ORDERING INFORMATION See 74HC HCT HCU HCMOS Logic Package Information PIN DESCRIPTION SYMBOL NAME AND FUNCTION 1A 2A 1B 2B 1Rp 2Rp 10 20 2Rext Cext GND 10 20 1 2Cgxr 1Rext Cext trigger inputs negative edge triggered trigger inputs positive edge triggered direct reset inputs active LOW outputs active LOW external resistor capacitor connection ground 0 V outputs active HIGH external capacitor connection external resistor capacitor connection positive supply voltage Fig 1 Pin configuration 14 2 6 tRext Cext 15 2 7 7293295 7296923 Fig 2 Logic symbol Fig 3 IEC logic symbol December 1990 Philips Semiconductors Dual non retriggerable monostable Product specification 3 221 multivibrator with reset FU
10. put pulse Schmitt trigger input circuitry for the nB inputs allow QUICK REFERENCE DATA 0 V Tamb 25 C tr tt 6 ns jitter free triggering from inputs with slow transition rates providing the circuit with excellent noise immunity Once triggered the outputs nQ nQ are independent of further transitions of nA and nB inputs and are a function of the timing components The output pulses can be terminated by the overriding active LOW reset inputs nRp Input pulses may be of any duration relative to the output pulse Pulse width stability is achieved through internal compensation and is virtually independent of Vcc and temperature In most applications pulse stability will only be limited by the accuracy of the external timing components The output pulse width is defined by the following relationship tw CextRextine tw 0 7 Pin assignments for the 221 are identical to those of the 123 so that the 221 can be substituted for those products in systems not using the retrigger by merely changing the value of Rgxr and or TYPICAL SYMBOL PARAMETER CONDITIONS propagation delay C 15 pF Voc 5 V Rext 5 0 pF nA nB nRp to nQ nA nB nRp to nQ nQ input capacitance power dissipation capacitance per package notes 1 and 2 Notes 1 Cpp is used to determine the dynamic power dissipation uW
11. tions Output capability standard except for lcc category MSI AC CHARACTERISTICS FOR 74HC GND 0 V tr 6 ns 50 pF Product specification 74HC HCT221 PARAMETER propagation delay trigger nA nB to nQ Tamb C TEST CONDITIONS 74HC WAVEFORMS 40 to 85 1 2 0 Cgxr 0 pF 4 5 Rext 5 6 0 Fig 10 propagation delay trigger nRp to nQ 2 0 Cgxr 0 pF 45 5 6 0 10 propagation delay trigger nA nB to nQ 2 0 Cgxr 0 pF 4 5 Rext 5 6 0 Fig 10 propagation delay trigger nRp to nQ propagation delay reset nRp to nQ propagation delay reset nRp to nQ 2 0 Cgxr pF 45 Rext 5 6 0 Fig 10 2 0 Cext 0 pF 4 5 Rext 5 6 0 Fig 11 2 0 pF 4 5 Rext 5kQ 6 0 Fig 11 output transition time 2 0 Fig 10 trigger pulse width nA LOW trigger pulse width nB HIGH trigger pulse width nRp LOW tw output pulse width 630 700 770 602 798 595 805 LOW nQ HIGH 2 0 Fig 7 2 0 Fig 7 2 0 Fig 8 5 0 100 nF 10 Fig 10 December 1990 6 Philips Semiconductors Product specification Dual non retriggerable monostable e 74 221 multivibrator with reset TEST CONDITIONS PARAMETER Vcc WAVEFORMS 40 to 85

PHILIPS 74HC/HCT221 Dual non-retriggerable monostable multivibrator with reset datasheet

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