INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC • The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC HEF4047B MSI Monostable/astable multivibrator Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator DESCRIPTION The HEF4047B consists of a gatable astable multivibrator with logic techniques incorporated to permit positive or negative edge-triggered monostable multivibrator action with retriggering and external counting options. Inputs include + TRIGGER, − TRIGGER, ASTABLE, ASTABLE, RETRIGGER and MR (Master Reset). Buffered outputs are O, O and OSCILLATOR OUTPUT. In all modes of operation an external capacitor (Ct) must be connected between CTC and RCTC, and an external resistor (Rt) must be connected between RTC and RCTC (continued on next page). Fig.1 Functional diagram. FAMILY DATA, IDD LIMITS category MSI See Family Specifications January 1995 2 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator An external count down option can be implemented by coupling O to an external ‘N’ counter and resetting the counter with the trigger pulse. The counter output pulse is fed back to the ASTABLE input and has a duration equal to N times the period of the multivibrator. A HIGH level on the MR input assures no output pulse during an ON-power condition. This input can also be activated to terminate the output pulse at any time. In the monostable mode, a HIGH level or power-ON reset pulse must be applied to MR, whenever VDD is applied. Astable operation is enabled by a HIGH level on the ASTABLE input. The period of the square wave at O and O outputs is a function of the external components employed. ‘True’ input pulses on the ASTABLE or ‘complement’ pulses on the ASTABLE input, allow the circuit to be used as a gatable multivibrator. The OSCILLATOR OUTPUT period will be half of the O output in the astable mode. However, a 50% duty factor is not guaranteed at this output. In the monostable mode, positive edge-triggering is accomplished by applying a leading-edge pulse to the + TRIGGER input and a LOW level to the − TRIGGER input. For negative edge-triggering, a trailing-edge pulse is applied to the − TRIGGER and a HIGH level to the + TRIGGER. Input pulses may be of any duration relative to the output pulse. The multivibrator can be retriggered (on the leading-edge only) by applying a common pulse to both the RETRIGGER and + TRIGGER inputs. In this mode the output pulse remains HIGH as long as the input pulse period is shorter than the period determined by the RC components. HEF4047BP(N): 14-lead DIL; plastic (SOT27-1) HEF4047BD(F): 14-lead DIL; ceramic (cerdip) HEF4047BT(D): 14-lead SO; plastic (SOT73) (SOT108-1) ( ): Package Designator North America Fig.2 Pinning diagram. January 1995 3 This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ... Philips Semiconductors Monostable/astable multivibrator January 1995 4 Product specification Fig.3 Logic diagram. HEF4047B MSI (1) Special input protection that allows operating input voltages outside the supply voltage lines. Compared to the standard input protection pin 3 is more sensitive to static discharge; extra handling precautions are recommended. Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator FUNCTIONAL CONNECTIONS PINS CONNECTED TO FUNCTION VDD VSS OUTPUT PULSE INPUT FROM PULSE PINS OUTPUT PERIOD OR PULSE WIDTH astable multivibrator free running 4, 5, 6, 14 7, 8, 9, 12 − 10, 11, 13 at pins 10, 11: true gating 4, 6, 14 7, 8, 9, 12 5 10, 11, 13 complement gating 6, 14 5, 7, 8, 9, 12 4 10, 11, 13 tA = 4,40 RtCt at pin 13: tA = 2,20 RtCt pos. edge-triggering 4, 14 5, 6, 7, 9, 12 8 10, 11 neg. edge-triggering 4, 8, 14 5, 7, 9, 12 6 10, 11 at pins 10, 11: retriggerable 4, 14 5, 6, 7, 9 8, 12 10, 11 tM = 2,48 RtCt 14 5, 6, 7, 8, 9, 12 − 10, 11 monostable multivibrator external count down(1) Notes 1. Input pulse to RESET of external counting chip; external counting chip output to pin 4. 2. In all cases, external resistor between pins 2 and 3, external capacitor between pins 1 and 3. DC CHARACTERISTICS VSS = 0 V; inputs at VSS or VDD Tamb (°C) VDD V SYMBOL −40 + 25 + 85 MAX. MIN. MAX. MAX. 0,3 − 0,3 1 Leakage current pin 3; output 15 I3 transistor OFF January 1995 5 µA pin 3 at VDD or VSS Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns VDD V SYMBOL MIN. TYP. MAX. TYPICAL EXTRAPOLATION FORMULA Propagation delays ASTABLE, ASTABLE → OSC. OUTPUT HIGH to LOW 95 190 68 ns + (0,55 ns/pF) CL 45 90 43 ns + (0,23 ns/pF) CL 30 60 22 ns + (0,16 ns/pF) CL 85 170 58 ns + (0,55 ns/pF) CL 40 80 29 ns + (0,23 ns/pF) CL 30 60 22 ns + (0,16 ns/pF) CL 150 300 123 ns + (0,55 ns/pF) CL 65 130 54 ns + (0,23 ns/pF) CL 50 100 42 ns + (0,16 ns/pF) CL 130 260 103 ns + (0,55 ns/pF) CL 60 120 49 ns + (0,23 ns/pF) CL 45 90 37 ns + (0,16 ns/pF) CL 160 320 133 ns + (0,55 ns/pF) CL 65 130 54 ns + (0,23 ns/pF) CL 15 50 100 42 ns + (0,16 ns/pF) CL 5 155 310 128 ns + (0,55 ns/pF) CL 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 ASTABLE, ASTABLE → O, O HIGH to LOW 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 +/− TRIGGER → O, O HIGH to LOW LOW to HIGH + TRIGGER, RETRIGGER → O HIGH to LOW + TRIGGER, RETRIGGER → O LOW to HIGH MR → O HIGH to LOW MR → O LOW to HIGH Output transition times HIGH to LOW LOW to HIGH 5 10 tPHL 65 130 54 ns + (0,23 ns/pF) CL 15 50 100 42 ns + (0,16 ns/pF) CL 5 65 130 38 ns + (0,55 ns/pF) CL 10 tPLH 30 60 19 ns + (0,23 ns/pF) CL 15 25 50 17 ns + (0,16 ns/pF) CL 5 95 190 68 ns + (0,55 ns/pF) CL 10 tPHL 40 80 29 ns + (0,23 ns/pF) CL 15 30 60 22 ns + (0,16 ns/pF) CL 5 100 200 83 ns + (0,55 ns/pF) CL 10 tPLH 45 90 34 ns + (0,23 ns/pF) CL 15 35 70 27 ns + (0,16 ns/pF) CL 5 100 200 83 ns + (0,55 ns/pF) CL 10 tPHL 45 90 34 ns + (0,23 ns/pF) CL 15 35 70 27 ns + (0,16 ns/pF) CL 5 60 120 10 ns + (1,0 ns/pF) CL 30 60 10 10 tPLH tTHL 6 ns + (0,28 ns/pF) CL 15 20 40 5 60 120 30 60 9 ns + (0,42 ns/pF) CL 20 40 6 ns + (0,28 ns/pF) CL 10 tTLH 15 January 1995 9 ns + (0,42 ns/pF) CL 6 10 ns + (1,0 ns/pF) CL Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator VDD V Minimum MR pulse 5 width; HIGH 10 SYMBOL MIN. TYP. MAX. tWMRH 15 60 30 30 15 20 10 Minimum input pulse width; any 5 input exept MR 10 tW 15 APPLICATION INFORMATION General features: • Monostable (one-shot) or astable (free-running) operation • True and complemented buffered outputs • Only one external R and C required Monostable multivibrator features: • Positive- or negative-edge triggering • Output pulse width independent of trigger pulse duration • Retriggerable option for pulse-width expansion • Long pulse width possible using small RC components by means of external counter provision • Fast recovery time essentially independent of pulse width • Pulse-width accuracy maintained at duty cycles approaching 100% Astable multivibrator features: • Free-running or gatable operating modes • 50% duty cycle • Oscillator output available January 1995 7 220 110 100 50 70 35 TYPICAL EXTRAPOLATION FORMULA Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator 1. Astable mode design information a. Unit-to-unit transfer-voltage variations The following analysis presents worst-case variations from unit-to-unit as a function of transfer-voltage (VTR) shift for free running (astable) operation. Fig.4 Astable mode waveforms. V TR t 1 = – R t C t In ---------------------------V DD + V TR V DD – V TR t 2 = – R t C t In ------------------------------2V DD – V TR ( V TR ) ( V DD – V TR ) t A = 2 ( t 1 + t 2 ) = – 2R t C t In ------------------------------------------------------------------------- , where t A = Astable mode pulse width. ( V DD + V TR ) ( 2V DD – V TR ) Values for tA are: VDD = 5 or 10 V VDD = 15 V typ. : VTR = 0,5 VDD; tA = 4,40 RtCt min. : VTR = 0,3 VDD; tA = 4,71 RtCt max.: VTR = 0,7 VDD; tA = 4,71 RtCt min. : VTR = 4 V; tA = 4,84 RtCt max.: VTR = 11 V; tA = 4,84 RtCt thus if tA = 4,40 RtCt is used, the maximum variation will be (+ 7,0%; −0,0%) at 10 V. January 1995 8 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator b. Variations due to changes in VDD In addition to variations from unit-to-unit, the astable period may vary as a function of frequency with respect to VDD. Typical variations are presented graphically in Figs 5 and 6 with 10 V as a reference. Fig.5 Typical O and O period accuracy as a function of supply voltage; astable mode; Tamb = 25 °C. CURVE A fO kHz 10 Ct pF Rt kΩ 100 220 B 5 100 470 C 1 1000 220 January 1995 9 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator Fig.6 Typical O and O period accuracy as a function of supply voltage; astable mode; Tamb = 25 °C. CURVE fO kHz Ct pF Rt kΩ A 500 10 47 B 225 100 10 C 100 100 22 D 50 100 47 January 1995 10 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator 2. Monostable mode design information The following analysis presents worst case variations from unit-to-unit as a function of transfer-voltage (VTR) shift for one-shot (monostalbe) operation. Fig.7 Monostable waveforms. V TR t 1 ‘ = – R t C t In -------------2V DD t M = ( t 1' + t 2 ) ( V TR ) ( V DD – V TR ) t M = – R t C t In ------------------------------------------------------------ , where t M = Monostable mode pulse width. ( 2V DD – V TR ) ( 2V DD ) Values for tM are: typ. : VTR = 0,5 VDD; tM = 2,48 RtCt VDD = 5 to10 V VDD = 15 V min. : VTR = 0,3 VDD; tM = 2,78 RtCt max.: VTR = 0,7 VDD; tM = 2,52 RtCt min. : VTR = 4 V; tM = 2,88 RtCt max.: VTR = 11 V; tM = 2,56 RtCt Note 1. In the astable mode, the first positive half cycle has a duration of tM; succeeding durations are 1⁄2 tA. thus if tM = 2,48 RtCt is used, the maximum variation will be (+ 12%; −0,0%) at 10 V. January 1995 11 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator 3. Retrigger mode operation The HEF4047B can be used in the retrigger mode to extend the output pulse duration, or to compare the frequency of an input signal with that of the internal oscillator. In the retrigger mode the input pulse is applied to pins 8 and 12, and the output is taken from pin 10 or 11. Normal monostable action is obtained when one retrigger pulse is applied (Fig.8). Extended pulse duration is obtained when more than one pulse is applied. For two input pulses, tRE = t1’ + t1 + 2t2. For more than two pulses, tRE (output O), terminates at some variable time, tD, after the termination of the last retrigger pulse; tD is variable because tRE (output O) terminates after the second positive edge of the oscillator output appears at flip-flop 4. Fig.8 Retrigger mode waveforms. 4. External counter option Time tM can be extended by any amount with the use of external counting circuitry. Advantages include digitally controlled pulse duration, small timing capacitors for long time periods, and extremely fast recovery time. A typical implementation is shown in Fig.9. The pulse duration at the output is: t ext = ( N – 1 ) ( t A ) + ( t M + 1 ⁄ 2 t A ) Where text = pulse duration of the circuitry, and N is the number of counts used. Fig.9 Implementation of external counter option. January 1995 12 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator 5. Timing component limitations The capacitor used in the circuit should be non-polarized and have low leakage (i.e. the parallel resistance of the capacitor should be an order of magnitude greater than the external resistor used). There is no upper or lower limit for either Rt or Ct value to maintain oscillation. However, in consideration of accuracy, Ct must be much larger than the inherent stray capacitance in the system (unless this capacitance can be measured and taken into account). Rt must be much larger than the LOCMOS ‘ON’ resistance in series with it, which typically is hundreds of ohms. The recommended values for Rt and Ct to maintain agreement with previously calculated formulae without trimming should be: Ct ≥ 100 pF, up to any practical value, 10 kΩ ≤ Rt ≤ 1 MΩ. 6. Power consumption In the standby mode (monostable or astable), power dissipation will be a function of leakage current in the circuit. For dynamic operation, the power needed to charge the external timing capacitor Ct is given by the following formulae: Astable mode: P = 2 Ct V2 f (f at output pin 13) P = 4 Ct V2 f (f at output pins 10 and 11) Monostable mode: 2 2, 9 C t V ( duty cycle ) P = --------------------------------------------------------------------- ( f at output pins 10 and 11 ) T Because the power dissipation does not depend on Rt, a design for minimum power dissipation would be a small value of Ct. The value of R would depend on the desired period (within the limitations discussed previously). Typical power consumption in astable mode is shown in Figs 10, 11 and 12. January 1995 13 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator Fig.10 Power consumption as a function of the output frequency at O or O; VDD = 5 V; astable mode. Fig.11 Power consumption as a function of the output frequency at O or O; VDD = 10 V; astable mode. January 1995 14 Philips Semiconductors Product specification HEF4047B MSI Monostable/astable multivibrator Fig.12 Power consumption as a function of the output frequency at O or O; VDD = 15 V; astable mode. January 1995 15 WWW.ALLDATASHEET.COM Copyright © Each Manufacturing Company. All Datasheets cannot be modified without permission. This datasheet has been download from : www.AllDataSheet.com 100% Free DataSheet Search Site. Free Download. No Register. Fast Search System. www.AllDataSheet.com