INTEGRATED CIRCUITS 74LV123 Dual retriggerable monostable multivibrator with reset Product specification Supersedes data of 1997 Feb 04 IC24 Data Handbook 1998 Apr 20 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset FEATURES 74LV123 DESCRIPTION * Optimized for Low Voltage applications: 1.0 to 5.5V * Accepts TTL input levels between VCC = 2.7V and VCC = 3.6V * Typical VOLP (output ground bounce) 0.8V @ VCC = 3.3V, The 74LV123 is a low-voltage Si-gate CMOS device and is pin and function compatible with the 74HC/HCT123. The 74LV123 is a dual retriggerable monostable multivibrator with output pulse width control by three methods. The basic pulse time is programmed by selection of an external resistor (REXT) and capacitor (CEXT). They are normally connected as shown in Figure 1. Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD, which also inhibits the triggering. Figures 1 and 2 illustrate pulse control by retriggering and early reset. The basic output pulse width is essentially determined by the values of the external timing components REXT and CEXT. For pulse width when CEXT <10000pF, see Figure 5. When CEXT 10,000pF, the typical output pulse width is defined as: tW = 0.45 REXT CEXT (typ.), where tW = pulse width in ns; REXT = external resistor in K; and CEXT = external capacitor in pF. Schmitt-trigger action in the nA and nB inputs makes the circuit highly tolerant of slower input rise and fall times. Tamb = 25C * Typical VOHV (output VOH undershoot) 2V @ VCC = 3.3V, Tamb = 25C * DC triggered from active HIGH or active LOW inputs * Retriggerable for very long pulses up to 100% duty factor * Direct reset terminates output pulses * Schmitt-trigger action on all inputs except for the reset input * Output capability: standard (except for nREXT/CEXT) * ICC category: MSI QUICK REFERENCE DATA GND = 0V; Tamb = 25C; tr = tf 2.5 ns SYMBOL PARAMETER CONDITIONS CL = 15pF VCC = 3.3V REXT = 5K CEXT = 0pF tPHL/tPLH Propagation delay nA, nB to nQ, nQ nRD to nQ, nQ CI Input capacitance CPD Power dissipation capacitance per monostable VCC = 3.3V, VI = GND to VCC1 TYPICAL UNIT 25 20 ns ns 3.5 pF 60 pF NOTES: 1. CPD is used to determine the dynamic power dissipation (PD in W) PD = CPD VCC2 fi (CL VCC2 fo) where: fi = input frequency in MHz; CL = output load capacitance in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL VCC2 fo) = sum of the outputs. ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. # 16-Pin Plastic DIL -40C to +125C 74LV123 N 74LV123 N SOT38-1 16-Pin Plastic SO -40C to +125C 74LV123 D 74LV123 D SOT109-1 16-Pin Plastic SSOP Type II -40C to +125C 74LV123 DB 74LV123 DB SOT338-1 16-Pin Plastic TSSOP Type I -40C to +125C 74LV123 PW 74LV123PW DH SOT403-1 1998 Apr 28 2 853-1911 19290 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset PIN CONFIGURATION 1A 1B LOGIC SYMBOL 16 1 15 2 14 1CEXT 1Q 4 13 1Q 2Q 5 12 2Q 2CEXT 6 11 2RD 2REXT/CEXT 7 10 2B 9 1,9 1A, 2A 2,10 1B, 2B 3,11 1RD, 2RD 4, 12 1Q, 2Q 7 2REXT/CEXT 15 2REXT/CEXT 7 1Q 13 2Q 5 Q 2A PIN DESCRIPTION SYMBOL 6 1REXT/CEXT S SV00096 PIN NUMBER 1 1A 9 2A 2 1B 10 2B T Q Trigger inputs (negative-edge triggered) 3 1RD 11 2RD Trigger inputs (positive-edge triggered) 4 2Q 12 SV00097 Direct reset LOW and trigger action at positive edge FUNCTIONAL DIAGRAM Outputs (active LOW) 1CEXT 14 2CEXT 6 1REXT/CEXT 15 2REXT/CEXT 7 1Q 13 2Q 5 External resistor/capacitor connection GND 13, 5 1Q, 2Q Outputs (active HIGH) 14, 6 1CEXT, 2CEXT External capacitor connection 15 1REXT/CEXT 16 VCC Ground (0V) S External resistor/capacitor connection Positive supply voltage Q LOGIC SYMBOL (IEEE/IEC) 15 1Q RD FUNCTION 8 14 14 2CEXT 1REXT/CEXT 3 8 1CEXT VCC 1RD GND 74LV123 CX RCX 1 1A 9 2A 2 1B 10 2B T Q 1Q 4 2Q 12 13 1 & RD 2 4 3 6 7 R RCX 5 & 10 12 R SV00098 1998 Apr 28 1RD 2RD SV00099 CX 9 11 3 11 3 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 LOGIC DIAGRAM nREXT/CEXT VCC Q RD Q R R CL VCC CL VCC R CL CL CL A B R It is recommended that Pin 6 (2CEXT) and Pin 14 (1CEXT) by externally grounded to Pin 8 (GND) SV00100 FUNCTION TABLE INPUTS nRD VCC OUTPUTS nA nB nQ nQ L X X L H X H X L* H* L* H* X X L H L H H L H REXT CEXT NOTES: * If the monostable was triggered before this condition was established, the pulse will continue as programmed. H = HIGH voltage level L = LOW voltage level X = don't care = LOW-to-HIGH transition = HIGH-to-LOW transition = one HIGH level output pulse = one LOW level output pulse 1998 Apr 28 to nCEXT (pin 14 or 6) to nREXT/CEXT (pin 15 or 7) SV00101 Figure 1.Timing component connection 4 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 RECOMMENDED OPERATING CONDITIONS SYMBOL VCC PARAMETER CONDITIONS MIN TYP MAX UNIT See Note1 1.0 3.3 5.5 V DC supply voltage VI Input voltage 0 - VCC V VO Output voltage 0 - VCC V +85 +125 C 500 200 100 50 ns/V Tamb Operating ambient temperature range in free air tr, tf Input rise and fall times except for Schmitt-trigger inputs See DC and AC characteristics -40 -40 VCC = 1.0V to 2.0V VCC = 2.0V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V to 5.5V - - - - - - - - NOTE: 1. The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V. ABSOLUTE MAXIMUM RATINGS1, 2 In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0V). SYMBOL PARAMETER CONDITIONS RATING UNIT -0.5 to +7.0 V VCC DC supply voltage IIK DC input diode current VI < -0.5 or VI > VCC + 0.5V 20 mA IOK DC output diode current VO < -0.5 or VO > VCC + 0.5V 50 mA IO DC output source or sink current - standard outputs -0.5V < VO < VCC + 0.5V 25 IGND, ICC Tstg PTOT DC VCC or GND current for types with - standard outputs 50 Storage temperature range Power dissipation per package - plastic DIL - plastic mini-pack (SO) - plastic shrink mini-pack (SSOP and TSSOP) -65 to +150 for temperature range: -40 to +125C above +70C derate linearly with 12 mW/K above +70C derate linearly with 8 mW/K above +60C derate linearly with 5.5 mW/K 750 500 500 mA mA C mW NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 1998 Apr 28 5 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 DC ELECTRICAL CHARACTERISTICS Over recommended operating conditions. Voltages are referenced to GND (ground = 0V). LIMITS SYMBOL PARAMETER -40C to +85C TEST CONDITIONS MIN VIH VIL HIGH level Input voltage LOW level Input voltage TYP1 VOH O VOL VOL O HIGH level output voltage; g STANDARD outputs l l output t t LOW level voltage out uts voltage; all outputs LOW level output voltage; g STANDARD outputs MIN 0.9 0.9 VCC = 2.0V 1.4 1.4 VCC = 2.7 to 3.6V 2.0 2.0 VCC = 4.5 to 5.5V 0.7VCC 0.7VCC UNIT MAX V VCC = 1.2V 0.3 0.3 VCC = 2.0V 0.6 0.6 VCC = 2.7 to 3.6V 0.8 0.8 0.3VCC 0.3VCC VCC = 1.2V; VI = VIH or VIL; -IO = 100A VOH MAX VCC = 1.2V VCC = 4.5 to 5.5 HIGH level l l output t t voltage out uts voltage; all outputs -40C to +125C V 1.2 VCC = 2.0V; VI = VIH or VIL; -IO = 100A 1.8 2.0 1.8 VCC = 2.7V; VI = VIH or VIL; -IO = 100A 2.5 2.7 2.5 VCC = 3.0V; VI = VIH or VIL; -IO = 100A 2.8 3.0 2.8 VCC = 4.5V; VI = VIH or VIL; -IO = 100A 4.3 4.5 4.3 VCC = 3.0V; VI = VIH or VIL; -IO = 6mA 2.40 2.82 2.20 VCC = 4.5V; VI = VIH or VIL; -IO = 12mA 3.60 4.20 3.50 V V VCC = 1.2V; VI = VIH or VIL; IO = 100A 0 VCC = 2.0V; VI = VIH or VIL; IO = 100A 0 0.2 0.2 VCC = 2.7V; VI = VIH or VIL; IO = 100A 0 0.2 0.2 VCC = 3.0V; VI = VIH or VIL; IO = 100A 0 0.2 0.2 VCC = 4.5V; VI = VIH or VIL; IO = 100A 0 0.2 0.2 VCC = 3.0V; VI = VIH or VIL; IO = 6mA 0.25 0.40 0.50 VCC = 4.5V; VI = VIH or VIL; IO = 12mA 0.35 0.55 0.65 V V Input leakage current VCC = 5.5V; VI = VCC or GND 1.0 1.0 A ICC Quiescent supply current; MSI VCC = 5.5V; VI = VCC or GND; IO = 0 20.0 160 A ICC Additional quiescent supply current VCC = 2.7V to 3.6V; VI = VCC - 0.6V 500 850 A II NOTES: 1. All typical values are measured at Tamb = 25C. 1998 Apr 28 6 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 AC CHARACTERISTICS GND = 0V; tr = tf 2.5ns; CL = 50pF; RL =1 K SYMBOL PARAMETER WAVEFORM VCC(V) tPHL tPLH tPHL tPLH tW tW tW Propagation delay nRD, nA, nB, to nQ Propagation delay nRD, nA, nB, to nQ Propagation delay nRD to nQ (reset) Propagation delay nRD to nQ (reset) Trigger gg pulse width nA = LOW Trigger gg pulse width nB = HIGH Reset pulse width nRD = LOW Figure 3 CEXT = 0pF REXT = 5K Figure 3 CEXT = 0pF REXT = 5K Figure 3 CEXT = 0pF REXT = 5K Figure 3 CEXT = 0pF REXT = 5K Figure 3 Figure 3 Figure 2 tW tW trtt 1998 Apr 28 Output pulse width nQ = HIGH nQ Q = LOW Retrigger gg time nA, nB Figures 1, 2 CEXT = 100nF REXT = 10K Figures 1, 2 CEXT = 0 0pF F REXT = 5K Figure 1 CEXT = 0 0pF F REXT = 5K -40 to +85C MIN TYP1 -40 to +125C MAX MIN 120 2.0 40 76 92 2.7 30 56 68 3.0 to 3.6 252 48 57 4.5 to 5.5 182 40 46 1.2 120 2.0 40 76 92 2.7 30 56 68 3.0 to 3.6 252 48 57 4.5 to 5.5 182 40 46 1.2 100 2.0 30 57 68 2.7 23 43 51 3.0 to 3.6 202 38 45 4.5 to 5.5 142 31 36 1.2 100 2.0 30 57 68 2.7 23 43 51 3.0 to 3.6 202 38 45 4.5 to 5.5 142 31 2.0 30 ns ns ns ns 36 5 40 2.7 25 3.5 30 3.0 to 3.6 20 3.02 25 4.5 to 5.5 15 2.52 20 2.0 30 13 40 2.7 25 8 30 3.0 to 3.6 20 72 25 4.5 to 5.5 15 52 20 2.0 35 6 45 2.7 30 5 40 3.0 to 3.6 25 42 30 4.5 to 5.5 20 32 25 ns ns ns 470 2.7 460 3.0 to 3.6 4502 4.5 to 5.5 4302 2.0 100 2.7 90 3.0 to 3.6 802 4.5 to 5.5 702 2.0 70 2.7 55 3.0 to 3.6 452 4.5 to 5.5 402 7 UNIT MAX 1.2 2.0 Output pulse width nQ = HIGH nQ Q = LOW LIMITS CONDITION s ns ns Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 AC CHARACTERISTICS (Continued) GND = 0V; tr = tf 2.5ns; CL = 50pF; RL =1 K SYMBOL REXT PARAMETER External timing resistor LIMITS CONDITION WAVEFORM -40 to +85C VCC(V) MIN 1.2 10 1000 2.0 5 1000 2.7 3 1000 3.0 to 3.6 2 1000 4.5 to 5.5 2 1000 Figure 5 TYP UNIT -40 to +125C MAX MIN MAX 1.2 2.0 CEXT External timing capacitor ca acitor Figure 53 2.7 No limits pF 3.0 to 3.6 4.5 to 5.5 NOTES: 1. Unless otherwise stated, all typical values are at Tamb = 25C. 2. Typical value measured at VCC = 3.3V. 3. Typical value measured at VCC = 5.0V. 4. For other REXT and CEXT combinations see Figure 5. if CEXT > 10 nF, the next formula is valid: tW = K x REXT x CEXT (typ.) where, tW = output pulse width in ns; REXT = external resistor in K; CEXT = external capacitor in pF; K = constant = 0.45 for VCC = 5.0V and 0.48 for VCC = 2.0V. The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is approximately 7 pF. 5. The time to retrigger the monostable multivibrator depends on the values of REXT and CEXT. The output pulse width will only be extended when the time between the active-going edges of the trigger pulses meets the minimum retrigger time. If CEXT > 10 pF, the next formula (at VCC = 5.0V) for the set-up time of a retrigger pulse is valid: trt = 30 + 0.19R x C-9 + 13 x R1.05 (typ.) = retrigger time in ns; where, trt CEXT = external capacitor in pF; REXT = external resistor in K. The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is approximately 7 pF. 6. When the device is powered up, initiate the device via a reset pulse, when CEXT < 50pF. AC WAVEFORMS VM = 1.5V at VCC 2.7V; VM = 0.5 VCC at VCC 2.7V; VOL and VOH are the typical output voltage drop that occur with the output load. nB INPUT nB INPUT tW nA INPUT nRD INPUT trt tW tW nQ OUTPUT nQ OUTPUT tW tW tW tW tW SV00139 SV00140 Figure 1.Output pulse control using retrigger pulse; nRD = HIGH. 1998 Apr 28 Figure 2.Output pulse control using reset input nRD; nA = LOW. 8 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset nB INPUT (nA LOW) 74LV123 VM tW nA INPUT (nB HIGH) tW VM nRD INPUT tPLH Q OUTPUT tPLH tW VM tTLH tTHL tPHL tW Q OUTPUT tPLH tW VM tTHL tTLH tPLH tPHL SV00197 Figure 3. Input (nA, nB, nRD) to output (nQ, nQ) propagation delays, the output transition times, and the input and output pulse widths. 1998 Apr 28 9 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 APPLICATION INFORMATION 0.8 Power-up considerations When the monostable is powered-up it may produce an output pulse, with a pulse width defined by the values of RX and CX. This output pulse can be eliminated using the circuit shown in Figure 6. `K' factor CX RX VCC 0.4 nCEXT nREXT/CEXT Q A B "123" Q 0 0 2 1 4 3 6 5 VCC (V) SV00185 RESET VCC Figure 4. HCT typical "k" factor as a function of VCC; CX = 10 nF; RX = 10 KW to 100 KW. SV00152 Figure 6. Power-up output pulse elimination circuit 106 REXT = 100kW Power-down considerations A large capacitor (CX) may cause problems when powering-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 sustain damage, due to the capacitor discharging through the input protection diodes. To avoid this possibility, connect a damping diode (DX) preferably a germanium or Schottky type diode able to withstand large current surges as shown in Figure 7. 105 50kW 104 tW ns 10kW 103 2kW DX 102 VCC 0 1 10 102 103 104 CX CEXT (pF) RX SV00141 nREXT/CEXT Figure 5.Typical output pulse width as a function of the external capacitor values at VCC = 3.3V and Tamb = 25C. 1998 Apr 28 SV00154 Figure 7. Power-down protection circuit 10 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset TEST CIRCUIT Vcc VO Vl PULSE GENERATOR D.U.T. 50pF RT RL= 1k CL Test Circuit for Outputs DEFINITIONS RL = Load resistor CL = Load capacitance includes jig and probe capacitiance RT = Termination resistance should be equal to ZOUT of pulse generators. TEST VCC tPLH/tPHL VI < 2.7V VCC 2.7-3.6V 2.7V 4.5 V VCC SV00902 Figure 8. Load circuitry for switching times 1998 Apr 28 11 74LV123 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset DIP16: plastic dual in-line package; 16 leads (300 mil); long body 1998 Apr 28 12 74LV123 SOT38-1 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset SO16: plastic small outline package; 16 leads; body width 3.9 mm 1998 Apr 28 13 74LV123 SOT109-1 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm 1998 Apr 28 14 74LV123 SOT338-1 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm 1998 Apr 28 15 74LV123 SOT403-1 Philips Semiconductors Product specification Dual retriggerable monostable multivibrator with reset 74LV123 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product Specification Full Production This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product. Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 print code Document order number: 1998 Apr 28 16 Date of release: 05-96 9397-750-04418